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Electronique pour le Traitement de l’Information Travaux Dirigés - 1A - S5 / Systèmes J. VILLEMEJANE Année universitaire 2017-2018 TD Sys1 - Diodes / LEDs 1 TD Sys2 - Photodétection 10 TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets EITI / 2016-2017 32 1

Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

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Page 1: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

Electronique pour le Traitement de l’Information

Travaux Dirigés - 1A - S5 / Systèmes

J. VILLEMEJANEAnnée universitaire 2017-2018

TD Sys1 - Diodes / LEDs 1

TD Sys2 - Photodétection 10

TD Sys3 - Filtrage actif 17

TD Sys4 - Capteurs 23

TD Sys5 - Projets EITI / 2016-2017 32

1

Page 2: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

1A - S5 - ETI TD Sys1

Diodes / LEDs

FICHES A LIRE— Diode / LED / Photodiode

Préparation1. Tracer la caractéristique du courant traversant une diode en fonction de la différence de potentiel à

ses bornes.

2. Chercher dans les documentations techniques (données en annexe) les points importants de cettecaractéristique ainsi que les valeurs critiques pour :

(a) une diode de signal 1N4148

(b) une diode de redressement 1N4002

(c) une diode Zener 5.1 V - BZX55C5V1

(d) une LED rouge / bleue - WURTH ELECTRONICS

Avez-vous compris ?1. On considère des diodes parfaites et idéales (figure 2a).

(a) Que doivent valoir R1 et R2 pour obtenir la caractéristique tracée dans le graphe I(V) pour l’en-semble dessiné en dessous ?

(b) Que devient cette caractéristique avec des diodes de seuil de 0,7 V , idéale par ailleurs ?

(c) Idem avec des diodes de résistance interne de 50 Ω.

2. On considère à présent le schéma et la caractéristique de la figure 2b. Les diodes ont pour seuil0,6 V. Que doivent valoir R1, R2 et R3 et le nombre de diodes N (N = 2 a été dessiné, mais à vous detrouver N) pour qu’on obtienne la caractéristique tracée dans le graphe I(V) ?

1

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IOGS - Electronique pour le Traitement de l’Information Travaux Dirigés

Montage 1 - Pont à diodesExpliquer le fonctionnement des deux montages suivants. Vous pourrez, par exemple, tracer l’allure du

signal de sortie VS pour une tension d’entrée sinusoïdale Ve = A · sin(ω · t).

Montage 2 - Diode ZenerExpliquer le fonctionnement du montage suivant.

Montage 3 - Diodes en direct et en inverseExpliquer le fonctionnement du montage suivant. Vous pourrez expliquer ce qu’il se passe lorsqu’on

applique en entrée le signal donné ci-dessous.

– 2 –

Page 4: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

IOGS - Electronique pour le Traitement de l’Information Travaux Dirigés

Exercice - Stabilisateur de tensionUne diode usuelle est caractérisée par avec une tension

de seuil Vd = 0, 6 V et une résistance r = 15Ω.Elle est utilisée dans le montage de la figure ci-contre.

1. La valeur moyenne de la tension d’entrée est de E = 4, 5 V. On vise un courant I′ de 30 mA. Quelledoit être la valeur de la résistance R ? Que vaut alors V ′ ?

2. Quelle variation maximale de la tension d’entrée ∆E peut-on autoriser pour que V ′ ne varie pasde plus de 1% ? Que vaut alors ∆E/E ? Justifier le nom de "stabilisateur de tension" de ce type demontage. Illustrer le fonctionnement du circuit à l’aide de la droite de charge de la diode.

3. Quelle est la puissance dissipée dans chaque élément ? Et au total ?

Les diodes ont été montées sur des circuits dont la technologie ne permet qu’une mauvaise évacua-tion thermique : il faut limiter la dissipation thermique à seulement 20 mW dans une diode (pas deproblème côté résistance, en revanche).

4. Quel montage proposez-vous pour absorber néanmoins les 30 mA prévus ? Fournit-il la même ten-sion que précédemment ?

5. Quel courant I′′ peut-on dériver de la source "stabilisée" en tolérant, pour V ′, une variation de -15 mV ? (dans le montage initial et dans celui qui vous avez proposé à la question 4)

– 3 –

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1N41

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tors

Rev

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Num

ber

: 818

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For

tech

nica

l que

stio

ns w

ithin

you

r re

gion

: Dio

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eric

as@

vish

ay.c

om, D

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urop

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ME

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T TO

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hay

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Rev

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Num

ber

: 818

57

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tech

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l que

stio

ns w

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you

r re

gion

: Dio

des

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eric

as@

vish

ay.c

om, D

iod

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sia@

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iod

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urop

e@vi

shay

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ME

NT

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AN

GE

WIT

HO

UT

NO

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Page 6: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

© S

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Page 7: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

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Page 8: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

2.7

2.6

2.5

2.4

2.3

2.2

2.1

REV

2015-0

3-2

3

2014-0

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3

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Max

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alde

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Ger

man

y

Tel.

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2 9

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2.6

2.5

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Max

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h-Str

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alde

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g

Ger

man

y

Tel.

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2 9

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d fo

r us

e in

equ

ipm

ent

whe

re a

hig

her

safe

ty s

tand

ard

and

relia

bilit

y st

anda

rd is

esp

ecia

lly r

equi

red

or w

here

a f

ailu

re o

f th

e pr

oduc

t is

rea

sona

bly

expe

cted

to

caus

e se

vere

per

sona

l inj

ury

or d

eath

, un

less

the

par

ties

have

exe

cute

d an

agr

eem

ent

spec

ifica

lly g

over

ning

suc

h us

e.

Mor

eove

r W

ürth

Ele

ktro

nik

eiSos

Gm

bH &

Co

KG

pro

duct

s ar

e ne

ither

des

igne

d no

r in

tend

ed f

or u

se in

are

as s

uch

as m

ilita

ry, ae

rosp

ace,

avi

atio

n, n

ucle

ar c

ontr

ol, su

bmar

ine,

tra

nspo

rtat

ion

(aut

omot

ive

cont

rol,

trai

n co

ntro

l, sh

ip c

ontr

ol), t

rans

port

atio

n si

gnal

, di

sast

er p

reve

ntio

n, m

edic

al, pu

blic

info

rmat

ion

netw

ork

etc.

. W

ürth

Ele

ktro

nik

eiSos

Gm

bH &

Co

KG

mus

t be

info

rmed

abo

ut t

he in

tent

of

such

usa

ge b

efor

e

the

desi

gn-i

n st

age.

In a

dditi

on, su

ffic

ient

rel

iabi

lity

eval

uatio

n ch

ecks

for

saf

ety

mus

t be

per

form

ed o

n ev

ery

elec

tron

ic c

ompo

nent

whi

ch is

use

d in

ele

ctrica

l circu

its t

hat

requ

ire

high

saf

ety

and

relia

bilit

y fu

nctio

nsor

per

form

ance

.

Page 9: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

2.3

2.2

2.1

2.0

1.0

REV

2013-0

9-1

0

2013-0

4-1

0

2012-1

2-1

0

2012-1

1-0

5

2011-0

9-0

1

DA

TE

SSt

SSt

SSt

SSt

SSt

BY

SSt

SSt

SSt

HO

e

PLD

CH

ECKED

Wür

th E

lekt

roni

k ei

Sos

Gm

bH &

Co.

KG

EMC

& In

duct

ive

Sol

utio

ns

Max

-Eyt

h-Str

. 1

74638 W

alde

nbur

g

Ger

man

y

Tel.

+49 (0) 79 4

2 9

45 -

0

ww

w.w

e-on

line.

com

eiSos

@w

e-on

line.

com

DES

CR

IPTI

ON

WL-S

MC

W S

MD

ch

ip L

ED

to

p v

iew

mo

no-

co

lor

wa

terc

lea

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Ord

er.-

No.

15

00

80

BS

75

00

0

SIZ

E

A4

Siz

e: 0

80

5

A D

imen

sio

ns:

[m

m]

Op

tica

l P

rop

ert

ies:

Pro

pert

ies

Ch

ip T

ech

no

log

y

Em

itti

ng

Co

lor

Len

s T

ype

Va

lue

InG

aN

Blu

e

Chi

p LE

D

B R

eco

mm

en

ded

la

nd

pa

ttern

: [m

m]

C S

ch

em

ati

c:

D A

bso

lute

Ma

xim

um

Ra

tin

gs

(Am

bie

nt

Tem

pera

ture

25

°C):

Pro

pert

ies

Po

wer

dis

sip

ati

on

Pea

k F

orw

ard

Cu

rren

t

Co

nti

nu

ou

s Fo

rwa

rd C

urr

en

t

Reve

rse V

olt

ag

e

ES

D T

hre

sho

ld/

Hu

ma

n B

od

y M

od

ell

Test

co

nd

itio

ns

duty

/10

@1

kHz

PD

iss

I F P

eak

I F

VR

ev

VES

D H

BM

Va

lue

10

5

10

0

30 5

10

00

Un

it

mW

mA

mA V V

E G

en

era

l in

form

ati

on

:•

Ope

ratin

g te

mpe

ratu

re:

-40

°C t

o +

85

°C

•S

tora

ge t

empe

ratu

re (se

aled

bag

): -

40

°C t

o +

85

°C;

60

% R

H m

ax.

This

ele

ctro

nic

com

pone

nt h

as b

een

desi

gned

and

dev

elop

ed f

or u

sage

in g

ener

al e

lect

roni

c eq

uipm

ent

only

. Th

is p

rodu

ct is

not

aut

horize

d fo

r us

e in

equ

ipm

ent

whe

re a

hig

her

safe

ty s

tand

ard

and

relia

bilit

y st

anda

rd is

esp

ecia

lly r

equi

red

or w

here

a f

ailu

re o

f th

e pr

oduc

t is

rea

sona

bly

expe

cted

to

caus

e se

vere

per

sona

l inj

ury

or d

eath

, un

less

the

par

ties

have

exe

cute

d an

agr

eem

ent

spec

ifica

lly g

over

ning

suc

h us

e.

Mor

eove

r W

ürth

Ele

ktro

nik

eiSos

Gm

bH &

Co

KG

pro

duct

s ar

e ne

ither

des

igne

d no

r in

tend

ed f

or u

se in

are

as s

uch

as m

ilita

ry, ae

rosp

ace,

avi

atio

n, n

ucle

ar c

ontr

ol, su

bmar

ine,

tra

nspo

rtat

ion

(aut

omot

ive

cont

rol,

trai

n co

ntro

l, sh

ip c

ontr

ol), t

rans

port

atio

n si

gnal

, di

sast

er p

reve

ntio

n, m

edic

al, pu

blic

info

rmat

ion

netw

ork

etc.

. W

ürth

Ele

ktro

nik

eiSos

Gm

bH &

Co

KG

mus

t be

info

rmed

abo

ut t

he in

tent

of

such

usa

ge b

efor

e

the

desi

gn-i

n st

age.

In a

dditi

on, su

ffic

ient

rel

iabi

lity

eval

uatio

n ch

ecks

for

saf

ety

mus

t be

per

form

ed o

n ev

ery

elec

tron

ic c

ompo

nent

whi

ch is

use

d in

ele

ctrica

l circu

its t

hat

requ

ire

high

saf

ety

and

relia

bilit

y fu

nctio

nsor

per

form

ance

.

2.3

2.2

2.1

2.0

1.0

REV

2013-0

9-1

0

2013-0

4-1

0

2012-1

2-1

0

2012-1

1-0

5

2011-0

9-0

1

DA

TE

SSt

SSt

SSt

SSt

SSt

BY

SSt

SSt

SSt

HO

e

PLD

CH

ECKED

Wür

th E

lekt

roni

k ei

Sos

Gm

bH &

Co.

KG

EMC

& In

duct

ive

Sol

utio

ns

Max

-Eyt

h-Str

. 1

74638 W

alde

nbur

g

Ger

man

y

Tel.

+49 (0) 79 4

2 9

45 -

0

ww

w.w

e-on

line.

com

eiSos

@w

e-on

line.

com

DES

CR

IPTI

ON

WL-S

MC

W S

MD

ch

ip L

ED

to

p v

iew

mo

no-

co

lor

wa

terc

lea

r

Ord

er.-

No.

15

00

80

BS

75

00

0

SIZ

E

A4

Siz

e: 0

80

5

D E

lectr

ica

l &

Op

tica

l P

rop

ert

ies:

Pro

pert

ies

Pea

k W

ave

len

gth

Do

min

an

t w

ave

len

gth

Lu

min

ou

sIn

ten

sity

Fo

rwa

rd v

olt

ag

e

Sp

ectr

al

Ba

nd

wid

th

Reve

rse C

urr

en

t

Vie

win

g a

ng

le

Test

co

nd

itio

ns

20

mA

20

mA

20

mA

20

mA

20

mA

5 V

20

mA

λ Pea

k

λ Dom I V VF

Δλ

I Rev

2θ 5

0%

Va

lue

min

.

90

typ

.

46

5

47

0

14

5

3.2 25

14

0

ma

x.

3.5 10

Un

it

nm nm mcd V nm μA °

This

ele

ctro

nic

com

pone

nt h

as b

een

desi

gned

and

dev

elop

ed f

or u

sage

in g

ener

al e

lect

roni

c eq

uipm

ent

only

. Th

is p

rodu

ct is

not

aut

horize

d fo

r us

e in

equ

ipm

ent

whe

re a

hig

her

safe

ty s

tand

ard

and

relia

bilit

y st

anda

rd is

esp

ecia

lly r

equi

red

or w

here

a f

ailu

re o

f th

e pr

oduc

t is

rea

sona

bly

expe

cted

to

caus

e se

vere

per

sona

l inj

ury

or d

eath

, un

less

the

par

ties

have

exe

cute

d an

agr

eem

ent

spec

ifica

lly g

over

ning

suc

h us

e.

Mor

eove

r W

ürth

Ele

ktro

nik

eiSos

Gm

bH &

Co

KG

pro

duct

s ar

e ne

ither

des

igne

d no

r in

tend

ed f

or u

se in

are

as s

uch

as m

ilita

ry, ae

rosp

ace,

avi

atio

n, n

ucle

ar c

ontr

ol, su

bmar

ine,

tra

nspo

rtat

ion

(aut

omot

ive

cont

rol,

trai

n co

ntro

l, sh

ip c

ontr

ol), t

rans

port

atio

n si

gnal

, di

sast

er p

reve

ntio

n, m

edic

al, pu

blic

info

rmat

ion

netw

ork

etc.

. W

ürth

Ele

ktro

nik

eiSos

Gm

bH &

Co

KG

mus

t be

info

rmed

abo

ut t

he in

tent

of

such

usa

ge b

efor

e

the

desi

gn-i

n st

age.

In a

dditi

on, su

ffic

ient

rel

iabi

lity

eval

uatio

n ch

ecks

for

saf

ety

mus

t be

per

form

ed o

n ev

ery

elec

tron

ic c

ompo

nent

whi

ch is

use

d in

ele

ctrica

l circu

its t

hat

requ

ire

high

saf

ety

and

relia

bilit

y fu

nctio

nsor

per

form

ance

.

Page 10: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

2.3

2.2

2.1

2.0

1.0

REV

2013-0

9-1

0

2013-0

4-1

0

2012-1

2-1

0

2012-1

1-0

5

2011-0

9-0

1

DA

TE

SSt

SSt

SSt

SSt

SSt

BY

SSt

SSt

SSt

HO

e

PLD

CH

ECKED

Wür

th E

lekt

roni

k ei

Sos

Gm

bH &

Co.

KG

EMC

& In

duct

ive

Sol

utio

ns

Max

-Eyt

h-Str

. 1

74638 W

alde

nbur

g

Ger

man

y

Tel.

+49 (0) 79 4

2 9

45 -

0

ww

w.w

e-on

line.

com

eiSos

@w

e-on

line.

com

DES

CR

IPTI

ON

WL-S

MC

W S

MD

ch

ip L

ED

to

p v

iew

mo

no-

co

lor

wa

terc

lea

r

Ord

er.-

No.

15

00

80

BS

75

00

0

SIZ

E

A4

Siz

e: 0

80

5

F V

iew

ing

An

gle

:F S

pectr

al:

This

ele

ctro

nic

com

pone

nt h

as b

een

desi

gned

and

dev

elop

ed f

or u

sage

in g

ener

al e

lect

roni

c eq

uipm

ent

only

. Th

is p

rodu

ct is

not

aut

horize

d fo

r us

e in

equ

ipm

ent

whe

re a

hig

her

safe

ty s

tand

ard

and

relia

bilit

y st

anda

rd is

esp

ecia

lly r

equi

red

or w

here

a f

ailu

re o

f th

e pr

oduc

t is

rea

sona

bly

expe

cted

to

caus

e se

vere

per

sona

l inj

ury

or d

eath

, un

less

the

par

ties

have

exe

cute

d an

agr

eem

ent

spec

ifica

lly g

over

ning

suc

h us

e.

Mor

eove

r W

ürth

Ele

ktro

nik

eiSos

Gm

bH &

Co

KG

pro

duct

s ar

e ne

ither

des

igne

d no

r in

tend

ed f

or u

se in

are

as s

uch

as m

ilita

ry, ae

rosp

ace,

avi

atio

n, n

ucle

ar c

ontr

ol, su

bmar

ine,

tra

nspo

rtat

ion

(aut

omot

ive

cont

rol,

trai

n co

ntro

l, sh

ip c

ontr

ol), t

rans

port

atio

n si

gnal

, di

sast

er p

reve

ntio

n, m

edic

al, pu

blic

info

rmat

ion

netw

ork

etc.

. W

ürth

Ele

ktro

nik

eiSos

Gm

bH &

Co

KG

mus

t be

info

rmed

abo

ut t

he in

tent

of

such

usa

ge b

efor

e

the

desi

gn-i

n st

age.

In a

dditi

on, su

ffic

ient

rel

iabi

lity

eval

uatio

n ch

ecks

for

saf

ety

mus

t be

per

form

ed o

n ev

ery

elec

tron

ic c

ompo

nent

whi

ch is

use

d in

ele

ctrica

l circu

its t

hat

requ

ire

high

saf

ety

and

relia

bilit

y fu

nctio

nsor

per

form

ance

.

2.3

2.2

2.1

2.0

1.0

REV

2013-0

9-1

0

2013-0

4-1

0

2012-1

2-1

0

2012-1

1-0

5

2011-0

9-0

1

DA

TE

SSt

SSt

SSt

SSt

SSt

BY

SSt

SSt

SSt

HO

e

PLD

CH

ECKED

Wür

th E

lekt

roni

k ei

Sos

Gm

bH &

Co.

KG

EMC

& In

duct

ive

Sol

utio

ns

Max

-Eyt

h-Str

. 1

74638 W

alde

nbur

g

Ger

man

y

Tel.

+49 (0) 79 4

2 9

45 -

0

ww

w.w

e-on

line.

com

eiSos

@w

e-on

line.

com

DES

CR

IPTI

ON

WL-S

MC

W S

MD

ch

ip L

ED

to

p v

iew

mo

no-

co

lor

wa

terc

lea

r

Ord

er.-

No.

15

00

80

BS

75

00

0

SIZ

E

A4

Siz

e: 0

80

5

F F

orw

ard

Cu

rren

t vs

. Fo

rwa

rd V

olt

ag

e:

F L

um

ino

us

Inte

nsi

ty v

s. F

orw

ard

Cu

rren

t:

This

ele

ctro

nic

com

pone

nt h

as b

een

desi

gned

and

dev

elop

ed f

or u

sage

in g

ener

al e

lect

roni

c eq

uipm

ent

only

. Th

is p

rodu

ct is

not

aut

horize

d fo

r us

e in

equ

ipm

ent

whe

re a

hig

her

safe

ty s

tand

ard

and

relia

bilit

y st

anda

rd is

esp

ecia

lly r

equi

red

or w

here

a f

ailu

re o

f th

e pr

oduc

t is

rea

sona

bly

expe

cted

to

caus

e se

vere

per

sona

l inj

ury

or d

eath

, un

less

the

par

ties

have

exe

cute

d an

agr

eem

ent

spec

ifica

lly g

over

ning

suc

h us

e.

Mor

eove

r W

ürth

Ele

ktro

nik

eiSos

Gm

bH &

Co

KG

pro

duct

s ar

e ne

ither

des

igne

d no

r in

tend

ed f

or u

se in

are

as s

uch

as m

ilita

ry, ae

rosp

ace,

avi

atio

n, n

ucle

ar c

ontr

ol, su

bmar

ine,

tra

nspo

rtat

ion

(aut

omot

ive

cont

rol,

trai

n co

ntro

l, sh

ip c

ontr

ol), t

rans

port

atio

n si

gnal

, di

sast

er p

reve

ntio

n, m

edic

al, pu

blic

info

rmat

ion

netw

ork

etc.

. W

ürth

Ele

ktro

nik

eiSos

Gm

bH &

Co

KG

mus

t be

info

rmed

abo

ut t

he in

tent

of

such

usa

ge b

efor

e

the

desi

gn-i

n st

age.

In a

dditi

on, su

ffic

ient

rel

iabi

lity

eval

uatio

n ch

ecks

for

saf

ety

mus

t be

per

form

ed o

n ev

ery

elec

tron

ic c

ompo

nent

whi

ch is

use

d in

ele

ctrica

l circu

its t

hat

requ

ire

high

saf

ety

and

relia

bilit

y fu

nctio

nsor

per

form

ance

.

Page 11: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

1A - S5 - ETI TD Sys2

Photodétection

FICHES A LIRE— Diode / LED / Photodiode— Capteurs— Amplificateur Lineaire Integre / Principe et montages de base

Montage 1 - PhotodiodeLa photodiode utilisée est de type SFH206 (voir documentation en annexe).

Montage 2 - Phototransistor / CNY70Le composant utilisé est de type CNY70 (voir documentation en annexe).

10

Page 12: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

IOGS - Electronique pour le Traitement de l’Information Travaux Dirigés

Montage 3 - PhotorésistanceOn souhaite réaliser un détecteur qui allume une LED lorsque la luminosité ambiante diminue. On

propose pour cela le montage suivant qui utilise une cellule photoconductrice CdS. On donne : Vcc = 12 Vet R2 = 100 kΩ.

Le composant qui détecte la luminosité est de type CDS - 8 kΩ pour 10 Lux (voir caractéristique ci-dessous).

Exercice - Transimpédance /Modèle completDans la suite, on choisit R f = 10 MΩ et on place une capacité C f dans la boucle de rétroaction de l’AO.

On modélise les défauts de la diode par une résistance RD = 100 MΩ et une capacité CD = 100 pF commeindiqué sur le schéma suivant.

Afin de modéliser correctement le comportement en fréquence de ce montage, il est nécessaire deprendre en compte le bruit interne de l’AO, que l’on modélisera par une source de tension équivalenteen entre les entrées + et -.

Par ailleurs, on pourra transformer le générateur de Norton formé par la diode et RD en générateur deThévenin (on appellera Ve la source de tension).

1. Exprimer Ve en fonction des éléments du montage.

2. Exprimer Vs en fonction de Ve et de en. En déduire :

(a) la fonction de transfert sans bruit du montage : Vs/Ve (en =0)

– 11 –

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IOGS - Electronique pour le Traitement de l’Information Travaux Dirigés

(b) la réponse au bruit du montage Vs/en (pour Ve=0).

3. On considère que l’AO possède un produit gain x bande passante de 1MHz. Tracer sur un mêmegraphique le diagramme de Bode asymptotique de l’AO seul, la fonction de transfert sans bruit et laréponse au bruit du montage dans les deux cas suivant : C f = 0 et C f = 10 pF.

4. Conclure sur l’utilité de la capacité C f .

– 12 –

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Page 15: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

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Page 16: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

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Page 17: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

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21

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1A - S5 - ETI TD Sys3

Filtrage actifFICHES A LIRE

— Amplificateur Lineaire Integre / Principe et montages de base— Regime Harmonique— Filtrage / Analyse harmonique / Ordre 1— Filtrage actif / Analyse harmonique / Ordre 2

Montage 1 - Cellule de RauchSoit la structure suivante. Décrire son fonctionnement et ses principales caractéristiques.

1. Que se passe-t-il si on remplace les impédances Z2 et Z5 par des condensateurs de valeur respectiveC2 et C5 et les impédances Z1, Z3 et Z4 par des résistances de valeur R ?

2. Que se passe-t-il si on remplace les impédances Z2 et Z5 par des résistances de valeur respective R2

et R5 et les impédances Z1, Z3 et Z4 par des condensateurs de valeur C ?

Montage 2 - Filtre universel UAF42Soit la structure suivante, basée sur un filtre universel UAF42 (void documentation technique en annexe).

Décrire son fonctionnement et ses principales caractéristiques.

17

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IOGS - Electronique pour le Traitement de l’Information Travaux Dirigés

Montage 3 - Filtre à capacité commutée /MAX296Soit la structure de base suivante. Expliquer son fonctionnement (en vous basant sur les charges accu-

mulées).

On insère à présent cette structure de base dans le montage suivant. Donner le fonction de transfert dece bloc.

Expliquer alors le fonctionnement du composant MAX296 (voir documentation technique en annexe).

– 18 –

Page 20: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

UA

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Page 21: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

V(s

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ofac

tive

filte

rs.

The

DO

S-co

mpa

tible

prog

ram

guid

esyo

uth

roug

hth

e(3

)de

sign

proc

ess

and

auto

mat

ical

lyca

lcul

ates

com

pone

ntva

lues

.A

band

-reje

ctre

spon

seis

obta

ined

bysu

mm

ing

the

low

-pas

san

dhi

gh-p

ass

outp

uts,

yiel

ding

the

trans

fer

Low

-pas

s,hi

gh-p

ass,

band

-pas

san

dba

nd-re

ject

func

tion

show

nin

Equa

tion

4:(n

otch

)filt

ers

can

bede

sign

ed.T

hepr

ogra

msu

ppor

tsth

eth

ree

mos

tco

mm

only

-use

dal

l-pol

efil

ter

type

s:Bu

tterw

orth

,Che

bysh

evan

dBe

ssel

.The

less

-fam

iliar

(4)

inve

rse

Che

bysh

evis

also

supp

orte

d,pr

ovid

ing

asm

ooth

pass

band

resp

onse

with

rippl

ein

the

stop

The

mos

tcom

mon

filte

rtyp

esar

efo

rmed

with

one

orba

nd.

mor

eca

scad

edse

cond

-ord

erse

ctio

ns.E

ach

sect

ion

isde

sign

edfo

rw

nan

dQ

acco

rdin

gto

the

filte

rty

peW

ithea

chda

taen

try,

the

prog

ram

auto

mat

ical

ly(B

utte

rwor

th,

Bess

el,

Che

bysh

ev,

etc.

)an

dcu

toff

calc

ulat

esan

ddi

spla

ysfil

ter

perfo

rman

ce.

This

frequ

ency

.W

hile

tabu

late

dda

taca

nbe

foun

din

feat

ure

allo

ws

asp

read

shee

t-lik

ew

hat-i

fde

sign

virtu

ally

any

filte

rde

sign

text

,th

ede

sign

prog

ram

appr

oach

.For

exam

ple,

aus

erca

nqu

ickl

yde

term

ine,

elim

inat

esth

iste

diou

spr

oced

ure.

bytri

alan

der

ror,

how

man

ypo

les

are

requ

ired

fora

desi

red

atte

nuat

ion

inth

est

opba

nd.G

ain/

phas

epl

ots

Seco

nd-o

rder

sect

ions

may

beno

ninv

ertin

gm

aybe

view

edfo

rany

resp

onse

type

.( F

igur

e1)

orin

verti

ng(F

igur

e2)

.D

esig

neq

uatio

nsfo

rth

ese

two

basi

cco

nfig

urat

ions

are

show

nfo

rre

fere

nce.

The

desi

gnpr

ogra

mso

lves

thes

eeq

uatio

ns,

prov

idin

gco

mpl

ete

resu

lts,

incl

udin

gco

mpo

nent

valu

es.

Cop

yrig

ht©

1992

–201

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xas

Inst

rum

ents

Inco

rpor

ated

Subm

itD

ocum

enta

tion

Feed

back

5

Prod

uctF

olde

rLin

k(s)

:UAF

42

A1R

2

50k

A2

A3

R4

50k

11

R1

50k

RF

1R

F2

C1

1000pF

C2

1000pF

3

13

87

14

RQ

LP

Out

BP

Out

HP

Out

112

50k

RG

VIN

2

RR

GQ

Desig

nE

quations

1.

=

n

2R

2

RR

RC

C1

F1

F2

12

2.Q

=

R(R

+R

)4

GQ

1+

R1

R2

1+

RR

C2

F1

1

RR

C1

F2

2

1/2

3.Q

A=

QA LP

HP

RR

C1

F1

1

RR

C2

F2

2

1/2

R1

R2

=A

BP

R2

4.A

=LP

R1

1+

RG

RG1

+R

Q1+

R41

R1

5.A

=H

P

R2

1+

RG

RG1

+R

Q1+

R41

R1

R2

A=

LP

6.A

=B

PR

G

R4

UA

F42

Note

:IfR

=50k

,theexte

rnalg

ain

-settin

g

resis

torc

anbeelim

inate

dbyconnectingV

topin

2.

G

INP

innum

bers

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IP

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isdiffe

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EVIS

EDO

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BER

2010

ww

w.ti

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re1.

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inve

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le-P

air

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umen

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ckC

opyr

ight

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sIn

stru

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orat

ed

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uctF

olde

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k(s)

:UAF

42

Page 22: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

8th

-Ord

er,

Lo

wp

ass

,S

wit

ch

ed

-Ca

pa

cit

or

Fil

ters

ELEC

TRIC

AL C

HARA

CTER

ISTI

CS (c

ontin

ued)

(V+

= 5

V,

V-

= -

5V,

filte

r ou

tput

mea

sure

d a

t O

UT

pin

, 20

kΩlo

ad r

esis

tor

to g

roun

d a

t O

UT

and

OP

OU

T, f

CLK

= 1

00kH

z(M

AX

291/

MA

X29

2) o

r f C

LK=

50k

Hz

(MA

X29

5/M

AX

296)

, TA

= T

MIN

to T

MA

X, u

nles

s ot

herw

ise

note

d.)

IN =

GN

D

V+

= 5

V, V

- =

-5V

, VC

LK=

0V

to 5

VV

- =

0V

, GN

D =

2

VC

LK=

0V

or

5V

T A=

+25

°C, f

CLK

= 1

00kH

z

f CLK

= 1

00kH

z

CO

SC

= 1

000p

F

COND

ITIO

NS

mA

1522

4.75

011

.000

Sin

gle

Sup

ply

2.37

5.50

0S

upp

ly V

olta

ge

Dua

l Sup

ply

µA0.

05In

put

Bia

s C

urre

ntV

±4

Out

put

DC

Sw

ing

mV

±10

±50

Inp

ut O

ffset

Vol

tag

e

dB

0.15

0-0

.15

DC

Inse

rtion

Gai

n E

rror

with

Out

put

Offs

et R

emov

ed

mV

±15

400

4O

utp

ut D

C S

win

gO

utp

ut O

ffset

Vol

tag

e

1.0

Low

V4.

0C

lock

Inp

ut H

igh

(Not

e 1)

µA±

70±

120

Inte

rnal

Osc

illat

or

Cur

rent

Sou

rce/

Sin

k

dB

-70

Tota

l Har

mon

ic D

isto

rtio

np

lus

Noi

se

mV

p-p

6C

lock

Fee

dth

roug

h

kHz

2935

43In

tern

al O

scill

ator

Freq

uenc

y

UNIT

SMI

NTY

PMA

XPA

RAME

TER

V+

= 2

.375

V, V

- =

-2.

375V

, VC

LK=

-2V

to 2

V7

12S

upp

ly C

urre

nt

CLOC

K

UNCO

MMIT

TED

OP A

MP

POW

ER R

EQUI

REME

NTS

V V

Typ

ica

l O

pe

rati

ng

Ch

ara

cte

rist

ics

(V+

= 5

V, V

- =

-5V

, TA

= +

25°C

, fC

LK=

100

kHz

(MA

X29

1/M

AX

292)

or

f CLK

= 5

0kH

z (M

AX

295/

MA

X29

6), u

nles

s ot

herw

ise

note

d.)

0.99

0

1.00

0

1.02

0

1.01

0

1.03

0

2.0

3.5

4.0

2.5

3.0

4.5

5.0

5.5

NORM

ALIZ

ED IN

TERN

AL O

SCIL

LATO

RFR

EQUE

NCY

vs. S

UPPL

Y VO

LTAG

E

MAX291/2/5/6-02

SUPP

LY V

OLTA

GE (V

)

NORMALIZED OSCILLATOR FREQUENCY

1nF

EXTE

RNAL

CAPA

CITO

R CL

K

0

100 50200

150

300

250

350

450

400

500

04

68

210

1214

1618

INTE

RNAL

OSC

ILLA

TOR

PERI

OD v

s.CA

PACI

TANC

E VA

LUE

MAX291/2/5/6-01

CAPA

CITA

NCE

(nF)

OSCILLATOR PERIOD (µs)

0.97

0.94

1.03

1.00

1.06

-60

-20

020

-40

4060

8010

012

014

0

NORM

ALIZ

ED IN

TERN

AL O

SCIL

LATO

RFR

EQUE

NCY

vs. T

EMPE

RATU

RE

MAX291/2/5/6-03

TEM

PERA

TURE

(°C)

NORMALIZED OSCILLATOR FREQUENCY

1nF

EXTE

RNAL

CAPA

CITO

R CL

K

Note

1.G

uara

ntee

d b

y d

esig

n.

MAX291/M

AX292/M

AX295/M

AX296

Max

im In

tegr

ated

3

Page 23: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

8th

-Ord

er,

Lo

wp

ass

, S

wit

ch

ed

-Ca

pa

cit

or

Fil

ters

-0.6

-0.7

-0.5

-0.2

-0.1

-0.3

-0.40

020

040

060

080

01k

MAX

291/

MAX

295

FREQ

UENC

Y RE

SPON

SEMAX291/2/5/6-04

INPU

T FR

EQUE

NCY

(Hz)

GAIN (dB)

MAX

295

F o =

1kH

z

MAX

291

-100

-120-8

0

-200

-40

-6020

01

23

45

MAX

291/

MAX

295

FREQ

UENC

Y RE

SPON

SE

MAX291/2/5/6-05

INPU

T FR

EQUE

NCY

(Hz)

GAIN (dB)

MAX

295

F o =

1kH

z

MAX

291

-100

-120-8

0

-200

-40

-6020

02

46

810

MAX

292/

MAX

296

FREQ

UENC

Y RE

SPON

SE

MAX291/2/5/6-06

INPU

T FR

EQUE

NCY

(Hz)

GAIN (dB)

MAX

296

F o =

1kH

z

MAX

292

69 8 711 1015 14 13 1216

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

SUPP

LY C

URRE

NT

vs. S

UPPL

Y VO

LTAG

E

MAX291/2/5/6-07

SUPP

LY V

OLTA

GE, V

+ OR

|V-|

SUPPLY CURRENT I+ OR |I-|(mA)

100k

Hz E

XTER

NAL

CLOC

K

1013 12 11141516

-60

200

-40

-20

4060

8010

012

014

0

SUPP

LY C

URRE

NT v

s. T

EMPE

RATU

RE

MAX291/2/5/6-10

TEM

PERA

TURE

(°C)

SUPPLY CURRENT (mA)

100k

Hz E

XTER

NAL

CLOC

KI+

OR

| I- |

-60

-70

-50

-20

-10

-30

-400

040

080

01.

2k1.

6k2k

MAX

291/

MAX

295

FREQ

UENC

Y RE

SPON

SEMAX291/2/5/6-08

INPU

T FR

EQUE

NCY

(Hz)

GAIN (dB)

F o =

1kH

z

MAX

291/

MAX

295

-12

-14

-10-4-2 -6 -80

040

080

01.

2k1.

6k2k

MAX

292/

MAX

296

FREQ

UENC

Y RE

SPON

SE

MAX291/2/5/6-09

INPU

T FR

EQUE

NCY

(Hz)

GAIN (dB)

MAX

296

F o =

1kH

z

MAX

292

-480

-560

-400

-160-8

0

-240

-3200

040

080

01.

2k1.

6k2k

MAX

291/

MAX

295

PHAS

E RE

SPON

SE

MAX291/2/5/6-11

INPU

T FR

EQUE

NCY

(Hz)

PHASE SHIFT (Degrees)

MAX

295

F o =

1kH

z

MAX

291

0

040

01.

2k2k

MAX

292/

296

PHAS

E RE

SPON

SE

-300

-350

-100

-150-5

0

INPU

T FR

EQUE

NCY

(Hz)

PHASE SHIFT (Degrees)

800

1.6k

-200

-250

f o =

1kH

z

MAX291/2/5/6-12

Typ

ica

l O

pe

rati

ng

Ch

ara

cte

rist

ics

(co

nti

nu

ed

)(V

+ =

5V

, V-

= -

5V, T

A=

+25

°C, f

CLK

= 1

00kH

z (M

AX

291/

MA

X29

2) o

r f C

LK=

50k

Hz

(MA

X29

5/M

AX

296)

, unl

ess

othe

rwis

e no

ted

.)

MAX291/M

AX292/M

AX295/M

AX296

4M

axim

Inte

grat

ed

erro

r on

its re

spec

tive

pole

s, w

hile

the

sam

e m

ism

atch

in a

ladd

er fi

lter d

esig

n w

ill sp

read

its

erro

r ove

r all

pole

s.

The

MA

X291

/MA

X292

/MA

X295

/MA

X296

inpu

t im

peda

nce

is e

ffect

ivel

y th

at o

f a

switc

hed

-cap

acito

r re

sist

or (

see

equa

tion

belo

w, a

nd T

able

1),

and

it is

inve

rsel

y pr

opor

tion-

al t

o fre

quen

cy.

The

inpu

t im

peda

nce

valu

es d

eter

min

edbe

low

rep

rese

nt a

vera

ge in

put i

mpe

danc

e, s

ince

the

inpu

tcu

rren

t is

not c

ontin

uous

. The

inpu

t cur

rent

flow

s in

a s

erie

sof

pul

ses

that

cha

rge

the

inpu

t ca

paci

tor

ever

y tim

e th

eap

prop

riate

sw

itch

is c

lose

d. A

goo

d ru

le o

f th

umb

is t

hat

the

driv

er’s

inp

ut s

ourc

e re

sist

ance

sho

uld

be

less

tha

n10

% o

f th

e fil

ter’s

inpu

t im

peda

nce.

The

inpu

t im

peda

nce

of th

e fil

ter c

an b

e es

timat

ed u

sing

the

follo

win

g fo

rmul

a:

Z =

1 /

(fC

LK*

C)

whe

re: f

CLK

= C

lock

Fre

que

ncy

The

inp

ut i

mp

edan

ce f

or v

ario

us c

lock

fre

que

ncie

s is

giv

en b

elow

:

Clo

ck

-Sig

na

l R

eq

uir

em

en

tsTh

e M

AX

291/

MA

X29

2/M

AX

295/

MA

X29

6 m

axim

um r

ec-

omm

ende

d cl

ock

frequ

ency

is 2

.5M

Hz,

pro

duci

ng a

cut

off

frequ

ency

of

25kH

z fo

r th

e M

AX2

91/M

AX2

92 a

nd 5

0kH

zfo

r th

e M

AX2

95/M

AX2

96.

The

CLK

pin

can

be

driv

en b

yan

ext

erna

l clo

ck o

r by

the

inte

rnal

osc

illat

or w

ith a

n ex

ter-

nal

cap

acito

r. Fo

r ex

tern

al c

lock

ap

plic

atio

ns,

the

cloc

kci

rcui

try h

as b

een

desi

gned

to

inte

rface

with

+5V

CM

OS

logi

c. D

rive

the

CLK

pin

with

a C

MO

S ga

te p

ower

ed fr

om0V

and

+5V

whe

n us

ing

eith

er a

sin

gle

+5V

sup

ply

or d

ual

+5V

sup

plie

s. T

he M

AX

291/

MA

X29

2/M

AX

295/

MA

X29

6su

pp

ly c

urre

nt i

ncre

ases

slig

htly

(<

3%)

with

inc

reas

ing

cloc

k fre

que

ncy

over

the

clo

ck r

ang

e 10

0kH

z to

1M

Hz.

Vary

ing

the

rate

of

an e

xter

nal c

lock

will

dyn

amic

ally

ad-

just

the

corn

er fr

eque

ncy

of th

e fil

ter.

Idea

lly,

the

MA

X29

1/M

AX

292/

MA

X29

5/M

AX

296

shou

ldb

e cl

ocke

d s

ymm

etric

ally

(50

% d

uty

cycl

e).

MA

X29

1/M

AX

292/

MA

X29

5/M

AX

296

can

be

oper

ated

with

clo

ckas

ymm

etry

of

up t

o 60

/40%

(or

40/

60%

) if

the

cloc

kre

mai

ns H

IGH

and

LO

W fo

r at

leas

t 200

ns. F

or e

xam

ple

,if

the

par

t has

a m

axim

um c

lock

rat

e of

2.5

MH

z, th

en th

ecl

ock

shou

ld b

e hi

gh

for

at l

east

200

ns,

and

low

for

at

leas

t 200

ns.

Whe

n us

ing

the

inte

rnal

osc

illat

or, t

he c

apac

itanc

e (C

OSC

)fro

m C

LK to

gro

und

dete

rmin

es th

e os

cilla

tor f

requ

ency

:

The

stra

y ca

pac

itanc

e at

CLK

sho

uld

be

min

imiz

ed b

e-ca

use

it w

ill a

ffect

the

inte

rnal

osc

illat

or fr

eque

ncy.

____

____

___A

pp

lic

ati

on

In

form

ati

on

Po

we

r S

up

plie

sTh

e M

AX

291/

MA

X29

2/M

AX

295/

MA

X29

6 op

erat

e fr

omei

ther

dua

l or

sing

le p

ower

sup

plie

s. T

he d

ual-s

uppl

y vo

lt-ag

e ra

nge

is +

2.37

5V to

+5.

500V

. The

±2.

5V d

ual s

uppl

y is

equi

vale

nt to

sin

gle-

supp

ly o

pera

tion

(Fig

ure

3). M

inor

per

-fo

rman

ce d

egra

dat

ion

coul

d o

ccur

due

to

the

exte

rnal

resi

stor

div

ider

net

wor

k, w

here

the

GN

D p

in is

bia

sed

tom

id-s

uppl

y.

Inp

ut

Sig

na

l R

an

ge

The

idea

l inp

ut s

igna

l ran

ge is

det

erm

ined

by

obse

rvin

g at

wha

t vo

ltage

leve

l the

tot

al h

arm

onic

dis

torti

on p

lus

nois

e(T

HD

+ N

oise

) ra

tio is

max

imiz

ed f

or a

giv

en c

orne

r fre

-qu

ency

. Th

e Ty

pica

l Ope

ratin

g C

hara

cter

istic

ssh

ow t

heM

AX2

91/M

AX2

92/M

AX2

95/M

AX2

96 T

HD

+ N

oise

resp

onse

as th

e in

put s

igna

l’s p

eak-

to-p

eak

ampl

itude

is v

arie

d.

Un

co

mm

itte

d O

p A

mp

The

unco

mm

itted

op

amp

has

its n

onin

verti

ng in

put

tied

to t

he G

ND

pin

, an

d ca

n be

use

d to

bui

ld a

1st

- or

2nd

-

fkH

zC

pF

OS

CO

SC

()

()

≈10

3

5

8th

-Ord

er,

Lo

wp

ass

,S

wit

ch

ed

-Ca

pa

cit

or

Fil

ters

C2

R1L1

L3L5

L7

V IN

C4C6

C8R2 V O

Fig

ure

2. 8

th-O

rder

Lad

der

Filt

er N

etw

ork

MAX

29_

CLK

1

+1V

TO +

4VIN

PUT

SIGN

ALRA

NGE

5

+5V

OUTP

UT 0V

6

3 4

+5V 0V

8

OUT

GND

V-V+7 2

OP O

UT

OP IN

-

IN

0.1µ

F10

k

10k

0.1µ

F

Fig

ure

3. +

5V S

ing

le-S

upp

ly O

per

atio

n

Table

1. In

put Im

peda

nce f

or V

ariou

s Cloc

kFr

eque

ncies

1000

kHz

(kΩ)

446

305

224

237

100k

Hz(MΩ)

4.46

3.05

2.24

2.37

10kH

z (MΩ)

44.6

30.5

22.4

23.7

C (p

F)

MA

X29

12.

24M

AX

292

3.28

PART

MA

X29

54.

47M

AX

296

4.22

Pin

Con

figur

atio

n is

8-p

in D

IP.

MAX291/M

AX292/M

AX295/M

AX296

Max

im In

tegr

ated

7

Page 24: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

1A - S5 - ETI TD Sys4

Capteurs

FICHES A LIRE— Amplificateur Lineaire Integre / Principe et montages de base— Capteurs

Notions supplémentaires sur les capteurs

Montage 1 - ADXL335

23

Page 25: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

IOGS - Electronique pour le Traitement de l’Information Travaux Dirigés

Montage 2 - TC77

Montage 3 - Capteur PIR - PYD 1788

– 24 –

Page 26: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

IOGS - Electronique pour le Traitement de l’Information Travaux Dirigés

Exercice - Sonde de platine /Montage à ALISonde de platine

On considère une sonde de platine (souvent notée PT100) pour laquelle la variation de températuresur sa plage de fonctionnement (-200˚C à +650˚C) peut être approximée par la formule (en Ohms avec Texprimée en ˚C) :

R(T ) = 100 (1 + 3.908 × 10−3T − 5.802 × 10−7T 2)

1. Que signifie, d’après vous, la valeur 100 dans le terme PT100 ?

2. Donner l’expression de la sensibilité de la sonde de platine. Calculer la variation relative ∆R/Rassociée à une variation de température de 0.1˚C autour de 0˚C. Compléter le tableau suivant :

3. Proposer une méthode simple pour mesurer la température. Quelle est la sensibilité de votre systèmede mesure pour un courant de 1 A injecté dans la résistance ? Un courant de 10 A ?

Montage à amplificateurs opérationnelsLe montage suivant utilise 4 amplificateurs opérationnels (AO) que l’on supposera idéaux. Une sonde

de platine est insérée dans la boucle de réaction de l’AO1. La diode Zener sert à délivrer une tension deréférence constante de valeur VZ = 1.2 V. Les valeurs des autres composants sont : VCC = 15 V, R0 = 10 kΩ,R1 = R3 = 1 kΩ et R2 = 100 Ω.

1. Décomposer ce circuit en différents étages et expliquer le rôle de chacun.

2. Exprimer la tension de sortie Vs en fonction de R(T ). Ce montage peut-il fonctionner avec des AOmonotensions (c’est-à-dire alimentés entre 0 V et VCC) ?

3. On souhaite obtenir en sortie du montage une sensibilité de 10mV/C autour de T = 0C. Quellevaleur faut-il choisir pour R4 ?

4. Dans ces conditions, exprimer la linéarité de ce montage sur une plage de fonctionnement de -100˚Cà +100˚C (on calculera pour cela l’écart maximal à la droite de pente 10 mV/˚C).

– 25 –

Page 27: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

Smal

l, Lo

w Po

wer,

3-Ax

is ±

3 g

Acce

lero

met

erAD

XL33

5

Rev

. B

Info

rmat

ion

furn

ishe

d by

Ana

log

Dev

ices

is b

elie

ved

to b

e ac

cura

te a

nd r

elia

ble.

How

ever

, no

resp

onsib

ility

is a

ssum

ed b

y A

nalo

g D

evic

es fo

r its

use

, nor

for a

ny in

frin

gem

ents

of p

aten

ts o

r oth

er

right

s of t

hird

par

ties t

hat m

ay re

sult

from

its u

se. S

peci

ficat

ions

subj

ect t

o ch

ange

with

out n

otic

e. N

o lic

ense

is g

rant

ed b

y im

plic

atio

n or

oth

erw

ise

unde

r any

pat

ent o

r pat

ent r

ight

s of A

nalo

g D

evic

es.

Trad

emar

ks a

nd re

gist

ered

trad

emar

ks a

re th

e pr

oper

ty o

f the

ir re

spec

tive

owne

rs.

O

ne

Tech

nol

ogy

Way

, P

.O.

Bo

x 91

06,

Nor

wo

od

, M

A 0

2062

-910

6, U

.S.A

.Te

l: 78

1.32

9.47

00

ww

w.a

nal

og.

com

Fa

x: 7

81.4

61.3

113

©20

09–2

010

An

alo

g D

evic

es, I

nc.

All

rig

hts

res

erve

d.

FEA

TUR

ES

3-ax

is s

ensi

ng

Sm

all,

low

pro

file

pac

kag

e 4

mm

× 4

mm

× 1

.45

mm

LFC

SP

Low

pow

er :

350 μ

A (t

ypic

al)

Sin

gle

-su

pp

ly o

per

atio

n: 1

.8 V

to 3

.6 V

10

,000

g s

ho

ck s

urv

ival

Ex

celle

nt t

emp

erat

ure

sta

bili

ty

BW

ad

just

men

t w

ith

a s

ing

le c

apac

ito

r p

er a

xis

Ro

HS/

WEE

E le

ad-f

ree

com

plia

nt

AP

PLI

CA

TIO

NS

Cost

sen

siti

ve, l

ow p

ow

er, m

oti

on

- an

d ti

lt-s

ensi

ng

ap

plic

atio

ns

Mo

bile

dev

ices

G

amin

g s

yste

ms

Dis

k d

rive

pro

tect

ion

Im

age

stab

iliza

tio

n

Spo

rts

and

hea

lth

dev

ices

GEN

ERA

L D

ESC

RIP

TIO

N

The

AD

XL3

35 is

a sm

all,

thin

, low

pow

er, c

ompl

ete

3-ax

is ac

cel-

erom

eter

with

sign

al c

ondi

tione

d vo

ltage

out

puts

. The

pro

duct

m

easu

res a

ccel

erat

ion

with

a m

inim

um fu

ll-sc

ale

rang

e of

±3

g.

It ca

n m

easu

re th

e st

atic

acc

eler

atio

n of

gra

vity

in ti

lt-se

nsin

g ap

plic

atio

ns, a

s wel

l as d

ynam

ic a

ccel

erat

ion

resu

lting

from

m

otio

n, sh

ock,

or v

ibra

tion.

The

user

sele

cts t

he b

andw

idth

of t

he a

ccel

erom

eter

usin

g th

e C

X, C

Y, an

d C

Z cap

acito

rs a

t the

XO

UT,

Y OU

T, an

d Z O

UT p

ins.

Band

wid

ths c

an b

e se

lect

ed to

suit

the

appl

icat

ion,

with

a

rang

e of

0.5

Hz

to 1

600

Hz

for t

he X

and

Y a

xes,

and

a ra

nge

of

0.5

Hz

to 5

50 H

z fo

r the

Z a

xis.

The

AD

XL3

35 is

ava

ilabl

e in

a sm

all,

low

pro

file,

4 m

m ×

4

mm

× 1

.45

mm

, 16-

lead

, pla

stic

lead

fram

e ch

ip sc

ale

pack

age

(LFC

SP_L

Q).

FUN

CTI

ON

AL

BLO

CK

DIA

GR

AM

07808-001

3-A

XIS

SE

NS

OR

AC

AM

PD

EM

OD

OU

TP

UT

AM

P

OU

TP

UT

AM

P

OU

TP

UT

AM

P

VS

CO

MS

T

XO

UT

YO

UT

ZO

UT

+3V

CX

CY

CZ

AD

XL

33

5~

32kΩ

~32

~32

CD

C

Fi

gure

1.

ADXL

335

Rev.

B |

Page

3 o

f 16

SPEC

IFIC

ATIO

NS

T A =

25°

C, V

S = 3

V, C

X =

CY =

CZ =

0.1

μF,

acc

eler

atio

n =

0 g,

unl

ess o

ther

wis

e no

ted.

All

min

imum

and

max

imum

spec

ifica

tions

are

gu

aran

teed

. Typ

ical

spec

ifica

tions

are

not

gua

rant

eed.

Tab

le 1

. Pa

ram

eter

Co

nd

itio

ns

Min

Ty

p

Max

U

nit

SE

NSO

R IN

PUT

Each

axi

s

M

easu

rem

ent R

ange

±3

±3.

6

g

Non

linea

rity

% o

f ful

l sca

le

±

0.3

%

Pa

ckag

e A

lignm

ent E

rror

±

1

Deg

rees

In

tera

xis

Alig

nmen

t Err

or

±0.

1

Deg

rees

C

ross

-Axi

s Se

nsit

ivit

y1

±1

%

SEN

SITI

VITY

(RAT

IOM

ETRI

C)2

Each

axi

s

Se

nsiti

vity

at X

OU

T, Y O

UT,

Z OU

T V S

= 3

V

270

300

330

mV/

g Se

nsiti

vity

Cha

nge

Due

to T

empe

ratu

re3

V S =

3 V

±0.

01

%

/°C

ZERO

g B

IAS

LEVE

L (R

ATIO

MET

RIC

)

0 g

Volta

ge a

t XO

UT,

Y OU

T V S

= 3

V

1.35

1.

5 1.

65

V 0

gVo

ltage

at Z

OU

T V S

= 3

V

1.2

1.5

1.8

V 0

g O

ffse

t vs.

Tem

per

atur

e

±

1

mg/

°C

NO

ISE

PERF

ORM

AN

CE

N

oise

Den

sity

XO

UT,

Y OU

T

15

0

μg/√

Hz

rms

Noi

se D

ensi

ty Z

OU

T

30

0

μg/√

Hz

rms

FREQ

UEN

CY

RESP

ON

SE4

Ba

ndw

idth

XO

UT,

Y OU

T5

No

exte

rnal

filt

er

16

00

H

z

Band

wid

th Z

OU

T5 N

o ex

tern

al fi

lter

550

H

z

R FIL

T Tol

eran

ce

32 ±

15%

Sens

or R

eson

ant F

requ

ency

5.

5

kHz

SELF

-TES

T6

Logi

c In

put L

ow

+0.

6

V Lo

gic

Inpu

t Hig

h

+

2.4

V

ST A

ctua

tion

Cur

rent

+

60

μA

O

utp

ut C

hang

e at

XO

UT

Self-

Test

0 to

Sel

f-Tes

t 1

−15

0 −

325

−60

0 m

V O

utp

ut C

hang

e at

YO

UT

Self-

Test

0 to

Sel

f-Tes

t 1

+15

0 +

325

+60

0 m

V O

utp

ut C

hang

e at

ZO

UT

Self-

Test

0 to

Sel

f-Tes

t 1

+15

0 +

550

+10

00

mV

OU

TPU

T A

MPL

IFIE

R

Out

put

Sw

ing

Low

N

o lo

ad

0.

1

V O

utp

ut S

win

g H

igh

No

load

2.8

V

POW

ER S

UPP

LY

O

per

atin

g Vo

ltag

e Ra

nge

1.

8

3.6

V Su

pp

ly C

urre

nt

V S =

3 V

350

μA

Turn

-On

Tim

e7 N

o ex

tern

al fi

lter

1

m

s TE

MPE

RATU

RE

O

per

atin

g Te

mp

erat

ure

Rang

e

−40

+85

°C

1 D

efin

ed a

s co

uplin

g b

etw

een

any

two

axes

. 2 S

ensi

tivity

is e

ssen

tially

ratio

met

ric to

VS.

3 D

efin

ed a

s th

e ou

tput

cha

nge

from

am

bien

t-to

-max

imum

tem

pera

ture

or a

mbi

ent-

to-m

inim

um te

mpe

ratu

re.

4 Act

ual f

requ

ency

resp

onse

con

trol

led

by

user

-sup

plie

d ex

tern

al fi

lter

cap

acito

rs (C

X, C

Y, C

Z).

5 Ban

dw

idth

with

ext

erna

l cap

acito

rs =

1/(

2 ×

π ×

32

kΩ ×

C).

For C

X, C

Y = 0

.003

μF,

ban

dwid

th =

1.6

kH

z. F

or C

Z = 0

.01 μF

, ban

dwid

th =

500

Hz.

For

CX, C

Y, C

Z = 1

0 μF

, b

andw

idth

= 0

.5 H

z.

6 Sel

f-te

st re

spon

se c

hang

es c

ubic

ally

with

VS.

7 Tur

n-on

tim

e is

dep

ende

nt o

n C

X, C

Y, C

Z and

is a

pp

roxi

mat

ely

160

× C

X o

r CY o

r CZ +

1 m

s, w

here

CX, C

Y, C

Z are

in m

icro

fara

ds (μ

F).

Page 28: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

ADXL

335

Rev.

B |

Page

5 o

f 16

PIN

CONF

IGUR

ATIO

N AN

D FU

NCTI

ON D

ESCR

IPTI

ONS

07808-003

NO

TE

S1.

EX

PO

SE

D P

AD

IS

NO

T I

NT

ER

NA

LL

Y

C

ON

NE

CT

ED

BU

T S

HO

UL

D B

E S

OL

DE

RE

D

F

OR

ME

CH

AN

ICA

L I

NT

EG

RIT

Y.

NC

= N

O C

ON

NE

CT

NC

1

ST

2

CO

M3

NC

4

XO

UT

12

NC

11

YO

UT

10

NC

9

COM

COM

COM

ZOUT

56

78

16

NC

15

VS

14

VS

13

NC

AD

XL

33

5T

OP

VIE

W(N

ot

to S

cale

)

+Z +

X

+Y

Fi

gure

2. P

in C

onfig

urat

ion

Tab

le 3

. Pin

Fun

ctio

n D

escr

iptio

ns

Pin

No.

M

nem

on

ic

Des

crip

tio

n

1 N

C

No

Con

nect

.1 2

ST

Self-

Test

. 3

COM

C

omm

on.

4 N

C

No

Con

nect

.1 5

COM

C

omm

on.

6 CO

M

Com

mon

. 7

COM

C

omm

on.

8 Z O

UT

Z C

hann

el O

utp

ut.

9 N

C

No

Con

nect

.1 10

Y O

UT

Y C

hann

el O

utp

ut.

11

NC

N

o C

onne

ct. 1

12

XO

UT

X C

hann

el O

utp

ut.

13

NC

N

o C

onne

ct. 1

14

V S

Sup

ply

Vol

tage

(1.8

V to

3.6

V).

15

V S

Sup

ply

Vol

tage

(1.8

V to

3.6

V).

16

NC

N

o C

onne

ct. 1

EP

Exp

osed

Pad

N

ot in

tern

ally

con

nect

ed. S

olde

r for

mec

hani

cal i

nteg

rity.

1 NC

pin

s ar

e no

t int

erna

lly c

onne

cted

and

can

be

tied

to C

OM

pin

s, u

nles

s ot

herw

ise

note

d.

ADXL

335

Rev.

B |

Page

11

of 1

6

APPL

ICAT

IONS

INFO

RMAT

ION

PO

WER

SU

PP

LY D

ECO

UP

LIN

G

For m

ost a

pplic

atio

ns, a

sing

le 0

.1 μ

F ca

paci

tor,

CD

C, p

lace

d cl

ose

to th

e A

DX

L335

supp

ly p

ins a

dequ

atel

y de

coup

les t

he

acce

lero

met

er fr

om n

oise

on

the

pow

er su

pply.

How

ever

, in

appl

icat

ions

whe

re n

oise

is p

rese

nt a

t the

50

kHz

inte

rnal

clo

ck

freq

uenc

y (o

r any

har

mon

ic th

ereo

f), a

dditi

onal

car

e in

pow

er

supp

ly b

ypas

sing

is re

quire

d be

caus

e th

is no

ise

can

caus

e er

rors

in

acc

eler

atio

n m

easu

rem

ent.

If ad

ditio

nal d

ecou

plin

g is

need

ed, a

100

Ω (o

r sm

alle

r) re

sisto

r or

ferr

ite b

ead

can

be in

sert

ed in

the

supp

ly li

ne. A

dditi

onal

ly, a

la

rger

bul

k by

pass

cap

acito

r (1 μF

or g

reat

er) c

an b

e ad

ded

in

para

llel t

o C

DC. E

nsur

e th

at th

e co

nnec

tion

from

the

AD

XL3

35

grou

nd to

the

pow

er su

pply

gro

und

is lo

w im

peda

nce

beca

use

nois

e tr

ansm

itted

thro

ugh

grou

nd h

as a

sim

ilar e

ffect

to n

oise

tr

ansm

itted

thro

ugh

VS.

SETT

ING

TH

E B

AN

DW

IDTH

USI

NG

CX, C

Y, A

ND

CZ

The

AD

XL3

35 h

as p

rovi

sions

for b

and

limiti

ng th

e X

OU

T, Y O

UT,

and

Z OU

T pin

s. C

apac

itors

mus

t be

adde

d at

thes

e pi

ns to

impl

e-m

ent l

ow-p

ass f

ilter

ing

for a

ntia

liasi

ng a

nd n

oise

redu

ctio

n. T

he

equa

tion

for t

he 3

dB

band

wid

th is

F −3

dB =

1/(

2π(3

2 kΩ

) × C

(X, Y

, Z))

or m

ore

simpl

y

F –3

dB =

5 μ

F/C (

X, Y

, Z)

The

tole

ranc

e of

the

inte

rnal

resis

tor (

R FIL

T) ty

pica

lly v

arie

s as

muc

h as

±15

% o

f its

nom

inal

val

ue (3

2 kΩ

), an

d th

e ba

ndw

idth

va

ries

acc

ordi

ngly.

A m

inim

um c

apac

itanc

e of

0.0

047 μF

for C

X,

CY,

and

CZ i

s rec

omm

ende

d in

all

case

s.

Tab

le 4

. Filt

er C

apac

itor S

elec

tion,

CX, C

Y, a

nd C

Z B

and

wid

th (H

z)

Cap

acit

or

(μF)

1

4.7

10

0.47

50

0.

10

100

0.05

20

0 0.

027

500

0.01

SELF

-TES

T Th

e ST

pin

con

trol

s the

self-

test

feat

ure.

Whe

n th

is pi

n is

set t

o V

S, an

ele

ctro

stat

ic fo

rce

is ex

erte

d on

the

acce

lero

met

er b

eam

. Th

e re

sulti

ng m

ovem

ent o

f the

bea

m a

llow

s the

use

r to

test

if

the

acce

lero

met

er is

func

tiona

l. Th

e ty

pica

l cha

nge

in o

utpu

t is −1

.08

g (c

orre

spon

ding

to −

325

mV

) in

the

X-a

xis,

+1.0

8 g

(or +

325

mV

) on

the

Y-ax

is, a

nd +

1.83

g (o

r +55

0 m

V) o

n th

e Z-

axis.

Thi

s ST

pin

can

be le

ft op

en-c

ircui

t or c

onne

cted

to

com

mon

(CO

M) i

n no

rmal

use

.

Nev

er e

xpos

e th

e ST

pin

to v

olta

ges g

reat

er th

an V

S + 0

.3 V

. If

this

cann

ot b

e gu

aran

teed

due

to th

e sy

stem

des

ign

(for

in

stan

ce, i

f the

re a

re m

ultip

le su

pply

vol

tage

s), t

hen

a lo

w

VF c

lam

ping

dio

de b

etw

een

ST a

nd V

S is r

ecom

men

ded.

DES

IGN

TR

AD

E-O

FFS

FOR

SEL

ECTI

NG

FIL

TER

C

HA

RA

CTE

RIS

TIC

S: T

HE

NO

ISE/

BW

TR

AD

E-O

FF

The

sele

cted

acc

eler

omet

er b

andw

idth

ulti

mat

ely

dete

rmin

es

the

mea

sure

men

t res

olut

ion

(sm

alle

st d

etec

tabl

e ac

cele

ratio

n).

Filte

ring

can

be

used

to lo

wer

the

nois

e flo

or to

impr

ove

the

reso

lutio

n of

the

acce

lero

met

er. R

esol

utio

n is

depe

nden

t on

th

e an

alog

filte

r ban

dwid

th a

tXO

UT,

Y OU

T, an

d Z O

UT.

The

outp

ut o

f the

AD

XL3

35 h

as a

typi

cal b

andw

idth

of g

reat

er

than

500

Hz.

The

use

r mus

t filt

er th

e sig

nal a

t thi

s poi

nt to

lim

it al

iasin

g er

rors

. The

ana

log

band

wid

th m

ust b

e no

mor

e th

an h

alf t

he a

nalo

g-to

-dig

ital s

ampl

ing

freq

uenc

y to

min

imiz

e al

iasi

ng. T

he a

nalo

g ba

ndw

idth

can

be

furt

her d

ecre

ased

to

redu

ce n

oise

and

impr

ove

reso

lutio

n.

The

AD

XL3

35 n

oise

has

the

char

acte

rist

ics o

f whi

te G

auss

ian

nois

e, w

hich

con

trib

utes

equ

ally

at a

ll fr

eque

ncie

s and

is

desc

ribe

d in

term

s of μ

g/√H

z (t

he n

oise

is p

ropo

rtio

nal t

o th

e sq

uare

root

of t

he a

ccel

erom

eter

ban

dwid

th).

The

user

shou

ld

limit

band

wid

th to

the

low

est f

requ

ency

nee

ded

by th

e ap

plic

a-tio

n to

max

imiz

e th

e re

solu

tion

and

dyna

mic

rang

e of

the

acce

lero

met

er.

With

the

sing

le-p

ole,

roll-

off c

hara

cter

istic

, the

typi

cal n

oise

of

the

AD

XL3

35 is

det

erm

ined

by

)1.

6(

××

=BW

Den

sity

Noi

seN

oise

rms

It is

ofte

n us

eful

to k

now

the

peak

val

ue o

f the

noi

se. P

eak-

to-

peak

noi

se c

an o

nly

be e

stim

ated

by

stat

istic

al m

etho

ds. T

able

5

is us

eful

for e

stim

atin

g th

e pr

obab

ilitie

s of e

xcee

ding

var

ious

pe

ak v

alue

s, gi

ven

the

rms v

alue

.

Tab

le 5

. Est

imat

ion

of P

eak-

to-P

eak

Noi

se

Peak

-to

-Pea

k V

alu

e %

of T

ime

That

No

ise

Exce

eds

No

min

al P

eak-

to-P

eak

Val

ue

2 ×

rms

32

4 ×

rms

4.6

6 ×

rms

0.27

8

× rm

s 0.

006

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2

00

2-2

01

2 M

icro

chip

Te

chn

olo

gy

Inc.

DS

20

09

2B

-pa

ge

1

TC

77

Fe

atu

res

•D

igita

l Te

mp

era

ture

Sen

sin

g in

5-P

in S

OT-

23A

an

d 8

-Pin

SO

IC P

ack

age

s

•O

utp

uts

Te

mpe

ratu

re a

s a

13-B

it D

igita

l Wo

rd

•S

PI a

nd

MIC

RO

WIR

E™

Co

mpa

tible

Inte

rfa

ce

•S

olid

Sta

te T

empe

ratu

re S

en

sing

•±1

°C (

max

.) a

ccu

racy

from

+25

°C to

+65

°C

•±2

°C (

max

.) a

ccu

racy

fro

m -

40°

C to

+85

°C

•±3

°C (

max

.) a

ccu

racy

from

-55

°C to

+12

5°C

•2.

7V

to 5

.5V

Ope

ratin

g R

ang

e

•Lo

w P

ow

er

-25

A (

typ.

) C

ontin

uo

us C

onve

rsio

n M

ode

-0.

A (

typ.

) S

hut

dow

n M

ode

Typ

ica

l Ap

plic

ati

on

s

•T

herm

al P

rote

ctio

n fo

r H

ard

Dis

k D

rive

s a

nd

Oth

er P

C P

erip

hera

ls

•P

C C

ard

Dev

ices

for

No

teb

ook

Com

pute

rs

•Lo

w C

ost T

herm

ost

at C

ont

rols

•In

dust

rial C

ontr

ol

•O

ffice

Equ

ipm

ent

•C

ellu

lar

Ph

one

s

•T

herm

isto

r R

epla

cem

ent

Blo

ck

Dia

gra

m

De

sc

rip

tio

n

The

TC

77

is a

se

rially

acc

ess

ible

dig

ital

tem

per

atu

rese

nso

r pa

rtic

ula

rly

suite

d fo

r lo

w c

ost

and

sm

all

form

-fa

ctor

ap

plic

atio

ns.

Tem

pera

ture

dat

a is

co

nve

rte

d fr

om

the

in

tern

al t

he

rmal

se

nsin

g e

lem

en

t a

nd m

ade

ava

il-a

ble

at

anyt

ime

as

a 1

3-b

it tw

o’s

co

mp

lime

nt

dig

ital

wor

d. C

om

mu

nica

tion

with

th

e T

C7

7 is

acc

ompl

ish

edvi

a a

SP

I an

d M

ICR

OW

IRE

co

mpa

tible

inte

rfa

ce. I

t has

a 1

2-b

it pl

us

sign

te

mp

era

ture

res

olu

tion

of

0.0

625

°Cpe

r L

east

Sig

nifi

cant

Bit

(LS

b). T

he

TC

77 o

ffers

a te

m-

pera

ture

acc

ura

cy o

f ±1

.0°C

(m

ax.)

ove

r th

e te

mp

era

-tu

re r

ange

of

+25

°C t

o +

65

°C.

Wh

en o

pera

ting,

the

TC

77 c

on

sum

es o

nly

250

µA

(ty

p.)

. T

he T

C77

’s C

on-

figu

ratio

n

reg

iste

r ca

n

be

u

sed

to

activ

ate

th

e lo

wp

ower

Shu

tdow

n m

od

e, w

hic

h h

as

a c

urr

ent

con

sum

p-

tion

of o

nly

0.1

µA

(ty

p.)

. Sm

all

size

, lo

w c

ost

an

d ea

seo

f use

ma

ke th

e T

C77

an

ide

al c

hoic

e fo

r im

ple

me

ntin

gth

erm

al m

ana

gem

en

t in

a v

ari

ety

of s

yste

ms.

Pa

ck

ag

e T

yp

es

Typ

ica

l Ap

plic

ati

on

TC

77D

iod

e Te

mpe

ratu

reS

en

sor

VD

D

SC

K

CS

Se

rial

Por

tIn

terf

ace

SI/O

13-

Bit

Sig

ma

Del

taA

/D C

onve

rter

Reg

iste

rTe

mpe

ratu

re

Reg

iste

r

Inte

rnal

Con

figur

atio

n

Man

ufa

ctu

rer

ID R

egis

ter

VS

S

SO

T-2

3-5

1

SO

IC

1V

DD

VS

S

SC

KS

I/O

CS

TC

77T

C77

SC

K

SI/

O

VS

S

NC

CS

VD

D

NC

NC

AN

0

SC

K

SD

I

CS

SC

K

SI/O

TC

77

0.1

µF

VD

D

VS

S

VD

D

PIC

®

MC

U

Th

erm

al S

enso

r w

ith

SP

I In

terf

ace

TC

77

DS

20

09

2B

-pa

ge

2

20

02

-20

12

Mic

roch

ip T

ech

no

log

y In

c.

1.0

EL

EC

TR

ICA

L

CH

AR

AC

TE

RIS

TIC

S

1.1

Ab

so

lute

Ma

xim

um

Ra

tin

gs

VD

D..

.....

.....

.....

.....

......

......

.....

.....

.....

....

......

......

....

...6.

0V

All

inp

uts

an

d o

utp

uts

w.r.

t. V

SS

.....

-0.3

V to

VD

D +

0.3

V

Sto

rag

e te

mp

erat

ure

......

......

.....

.....

....

-65°

C t

o +

150

°C

Am

bien

t te

mp

. with

po

wer

ap

plie

d..

...-

55°C

to

+12

5°C

Junc

tion

Te

mp

era

ture

......

.....

......

.....

......

.....

......

..15

0°C

ES

D p

rote

ctio

n o

n a

ll p

ins:

Hum

an B

ody

Mod

el (

HB

M).

.....

.....

.....

.....

.....

....

>4

kV

Ma

chin

e M

ode

l (M

M).

......

....

.....

......

.....

......

.....

>20

0V

No

tice

: S

tre

sse

s a

bo

ve

tho

se

liste

d

un

de

r "M

axi

mu

mR

atin

gs"

ma

y ca

use

pe

rma

ne

nt d

am

ag

e to

the

de

vice

. Th

is is

a s

tre

ss r

atin

g o

nly

an

d f

un

ctio

na

l o

pe

ratio

n o

f th

e d

evi

ce a

tth

ose

or

an

y o

the

r co

nd

itio

ns

ab

ove

th

ose

in

dic

ate

d i

n t

he

op

era

tion

list

ing

s o

f th

is s

pe

cific

atio

n is

no

t im

plie

d. E

xpo

sure

to m

axi

mu

m r

atin

g co

nd

ition

s fo

r e

xte

nd

ed p

erio

ds

ma

y af

fect

de

vice

re

liab

ility

.

PIN

FU

NC

TIO

N T

AB

LE

Na

me

Fu

nc

tio

n

SI/O

Ser

ial D

ata

Pin

SC

KS

eria

l Clo

ck

VS

SG

roun

d

CS

Chi

p S

ele

ct (

Act

ive-

Low

)

NC

No

Co

nne

ctio

n

VD

DP

ower

Sup

ply

DC

CH

AR

AC

TE

RIS

TIC

SE

lec

tric

al S

pec

ific

atio

ns:

Unl

ess

oth

erw

ise

not

ed,

all

para

me

ters

ap

ply

at V

DD

= 2

.7V

to

5.5

V a

nd

T A =

-5

5°C

to +

125

°C.

Par

amet

ers

Sy

mM

inTy

pM

axU

nit

sC

on

dit

ion

s

Po

wer

Su

pp

ly

Op

era

ting

Vo

ltag

e R

ang

eV

DD

2.7

—5

.5V

No

te1

Op

era

ting

Cur

rent

I DD

—2

5040

AC

ontin

uou

s Te

mp

era

ture

Con

vers

ion

Mo

de

Pow

er-O

n R

ese

t Thr

esho

ldV

PO

R1

.21

.62.

2V

VD

D fa

llin

g o

r ris

ing

ed

ge

Sta

ndby

Sup

ply

Cur

rent

I DD

-

STA

ND

BY

—0

.11

.0µ

AS

hut

do

wn

Mo

de

Tem

per

atu

re t

o B

its

Co

nve

rte

r

Res

olut

ion

—13

—B

itsA

DC

LS

b =

0.0

625°

C/b

it (N

ote

4)

Tem

pera

ture

Con

vers

ion

Tim

et C

T—

300

400

ms

Tem

pera

ture

Acc

urac

y (N

ote

1)T

ER

R-1

.0-2

.0-3

.0

— — —

+1.

0+

2.0

+3.

0

°C+

25°C

< T

A <

+65

°C-4

0°C

< T

A <

+85

°C-5

5°C

< T

A <

+12

5°C

TC

77-3

.3M

XX

: VD

D =

3.3

VT

C77

-5.0

MX

X: V

DD

= 5

.0V

No

te 1

:T

he T

C7

7-3

.3M

XX

an

d T

C77

-5.0

MX

X w

ill o

pera

te fr

om

a s

up

ply

volta

ge

of 2

.7V

to 5

.5V

. Ho

wev

er,

the

tem

-pe

ratu

re a

ccu

racy

of t

he T

C77

-3.3

MX

X a

nd

TC

77-5

.0M

XX

is s

pe

cifie

d a

t the

nom

ina

l op

era

ting

vo

ltage

s o

f 3.

3V a

nd

5.0

V, r

espe

ctiv

ely

. As

VD

D v

arie

s fr

om th

e n

om

ina

l op

era

ting

va

lue,

th

e a

ccur

acy

ma

y be

de

grad

ed

(Ref

er to

Fig

ure

s2-

6 an

d 2

-7).

2:A

ll tim

e m

easu

rem

ent

s a

re m

easu

red

with

re

spec

t to

the

50

% p

oin

t of

the

sig

nal.

3:Lo

ad

Ca

paci

tanc

e, C

L =

80

pF,

is u

sed

for

AC

tim

ing

mea

sure

me

nts

of

outp

ut

sign

als

.4:

Re

solu

tion

= T

em

pera

ture

Ran

ge/N

o. o

f Bits

= (

+2

55°C

– -

256°

C)

/ (2

13 )

Res

olu

tion

= 5

12/8

19

2 =

0.0

625

°C/B

it

Page 30: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

2

00

2-2

01

2 M

icro

chip

Te

chn

olo

gy

Inc.

DS

20

09

2B

-pa

ge

3

TC

77

Dig

ital

Inp

ut/

Ou

tpu

t

Hig

h Le

vel I

nput

Vol

tage

VIH

0.7

VD

D—

VD

D +

0.3

V

Low

Lev

el In

put V

olta

geV

IL-0

.3—

0.3

VD

DV

Hig

h Le

vel O

utpu

t Vol

tage

VO

H2.

4—

—V

I OH

= -

400

µA

Low

Lev

el O

utpu

t Vol

tage

VO

L—

—0.

4V

I OL

= +

2m

A

Inpu

t Cur

rent

I IN(0

),

I IN(1

)

-1.0

-1.0

— —+

1.0

+1.

0µA

VIN

= G

ND

VIN

= V

DD

Inpu

t Hys

tere

sis

0.35

0.8

—V

SI/O

, SC

K

Pin

Cap

acita

nce

CIN

, CO

UT

—20

—pF

Tri-s

tate

Out

put L

eaka

geC

urre

ntI O

_LE

AK

-1.0 —

— —— +1.

0µA

VO

= G

ND

VO

= V

DD

Ser

ial P

ort

AC

Tim

ing

(N

ote

s2,

3)

Clo

ck F

requ

ency

f CLK

DC

—7.

0M

Hz

CS

Fal

l to

Firs

t Ris

ing

SC

K

Edg

e t C

S-S

CK

100

——

ns

CS

Low

to D

ata

Out

Del

ayt C

S-S

I/O—

—70

ns

SC

K F

all t

o D

ata

Out

Del

ayt D

O—

—10

0ns

CS

Hig

h to

Dat

a O

utTr

i-sta

tet D

IS—

—20

0ns

SC

K H

igh

to D

ata

In H

old

Tim

et H

D50

——

ns

Dat

a In

Set

-up

Tim

et S

U30

——

ns

Th

erm

al P

acka

ge

Res

ista

nce

The

rmal

Res

ista

nce,

SO

T23

-5 J

A—

230

—°C

/W

The

rmal

Res

ista

nce,

8L-

SO

IC J

A—

163

—°C

/W

DC

CH

AR

AC

TE

RIS

TIC

S (

CO

NT

INU

ED

)E

lec

tric

al S

pec

ific

atio

ns:

Unl

ess

oth

erw

ise

not

ed,

all

para

me

ters

ap

ply

at V

DD

= 2

.7V

to

5.5

V a

nd

T A =

-5

5°C

to +

125

°C.

Par

am

ete

rsS

ym

Min

Typ

Max

Un

its

Co

nd

itio

ns

No

te 1

:T

he T

C7

7-3

.3M

XX

an

d T

C77

-5.0

MX

X w

ill o

pera

te fr

om

a s

up

ply

volta

ge

of 2

.7V

to 5

.5V

. Ho

wev

er, t

he

tem

-pe

ratu

re a

ccu

racy

of t

he T

C77

-3.3

MX

X a

nd

TC

77-5

.0M

XX

is s

pe

cifie

d a

t the

nom

ina

l op

era

ting

vo

ltage

s o

f 3.

3V a

nd

5.0

V, r

espe

ctiv

ely

. As

VD

D v

arie

s fr

om th

e n

om

ina

l op

era

ting

va

lue,

th

e a

ccur

acy

ma

y be

de

grad

ed

(Ref

er to

Fig

ure

s2-

6 an

d 2

-7).

2:A

ll tim

e m

easu

rem

ent

s a

re m

easu

red

with

re

spec

t to

the

50

% p

oin

t of

the

sig

nal.

3:Lo

ad

Ca

paci

tanc

e, C

L =

80

pF,

is u

sed

for

AC

tim

ing

mea

sure

me

nts

of

outp

ut

sig

nals

.4:

Re

solu

tion

= T

em

pera

ture

Ran

ge/N

o. o

f Bits

= (

+2

55°C

– -

256

°C)

/ (2

13 )

Res

olu

tion

= 5

12/8

19

2 =

0.0

625

°C/B

it

TC

77

DS

20

09

2B

-pa

ge

4

20

02

-20

12

Mic

roch

ip T

ech

no

log

y In

c.

FIG

UR

E 1

-1:

Tim

ing

Dia

gram

s.

CS

SC

K

1/f

CL

K

SI/

O

t DO

LS

bt DIS

HI-

Z

Dat

a O

utp

ut

Tim

ing

MS

b

t CS

-SI/O

t HD

t SU

SI/

O

SC

K

CS

HI-

ZS

I/O

SC

K

CS

HI-

Z

t HD

t SU

HI-

Z

t CS

-SC

K

SI/

O D

ata

Inp

ut

Set

-up

an

d H

old

Tim

ing

(D

ata

is c

lock

ed o

n t

he

risi

ng

ed

ge

of

SC

K)

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2

00

2-2

01

2 M

icro

chip

Te

chn

olo

gy

Inc.

DS

20

09

2B

-pa

ge

9

TC

77

3.1

Tem

pe

ratu

re D

ata

Fo

rma

t

A 1

3-b

it tw

o’s

co

mp

lem

en

t di

gita

l wor

d is

use

d t

o r

ep-

rese

nt t

he

tem

pe

ratu

re. T

he L

east

Sig

nifi

can

t Bit

(LS

b)

is e

qu

al to

0.0

625

°C. N

ote

tha

t th

e la

st tw

o L

Sb

bits

(B

it0

and

1)

are

tri-

sta

ted

an

d a

re r

epre

sent

ed

as

a lo

gic

‘1’

in t

he ta

ble

. B

it 2

is s

et

to lo

gic

‘1’ a

fter

the

com

ple

tion

of t

he

fir

st t

em

per

atu

re c

onv

ersi

on

fo

llow

ing

a p

owe

r-up

or

volta

ge

re

set

eve

nt.

TAB

LE

3-1

:T

C77

OU

TP

UT

An

ove

r-te

mp

era

ture

co

nditi

on

can

be

dete

rmin

ed

byre

adi

ng

onl

y th

e fi

rst f

ew M

ost

Sig

nific

ant B

its (

MS

b) o

fth

e te

mp

era

ture

dat

a. F

or e

xam

ple

, th

e m

icro

pro

cess

or

cou

ld r

ead

on

ly t

he

fir

st f

our

bits

of

the

Te

mp

era

ture

reg

iste

r in

ord

er to

de

term

ine

tha

t an

ove

r-te

mp

erat

ure

con

ditio

n e

xist

s.

3.2

Po

we

r-U

p A

nd

Po

we

r-D

ow

n

The

TC

77 i

s in

the

Con

tinu

ous

Tem

per

atu

re C

onve

r-si

on m

od

e a

t po

wer

-up

. Th

e fir

st v

alid

tem

pe

ratu

re c

on-

vers

ion

will

be

ava

ilabl

e a

ppro

xim

ate

ly 3

00

ms

(ref

er

to“T

em

per

atu

re to

Bits

Co

nver

ter”

sec

tion

liste

d in

the

DC

cha

ract

eri

stic

s ta

ble)

afte

r po

wer

-up.

Bit

2 o

f th

e Te

m-

pera

ture

reg

iste

r is

set

to a

log

ic ‘1

’ afte

r th

e co

mp

letio

nof

th

e f

irst

te

mp

era

ture

co

nver

sio

n f

ollo

win

g a

pow

er-

up o

r vo

ltag

e re

set e

vent

. B

it 2

is s

et

to lo

gic

‘0’ d

uri

ngth

e ti

me

ne

ede

d to

co

mp

lete

the

first

tem

pera

ture

con

-ve

rsio

n. T

hus

, th

e st

atu

s o

f b

it 2

can

be

mo

nito

red

to

ind

icat

e th

e co

mp

letio

n o

f the

firs

t te

mp

era

ture

con

ver-

sion

.

A s

up

ply

volta

ge lo

wer

than

1.6

V (

typ.

) is

co

nsid

ere

d a

pow

er-d

ow

n st

ate

for

the

TC

77.

Th

e d

evic

e w

ill r

ese

tits

elf

and

con

tinu

e its

no

rma

l C

ontin

uou

s C

onve

rsio

nm

ode

of o

per

atio

n w

hen

the

su

ppl

y vo

ltag

e r

ises

ab

ove

the

no

min

al

1.6

V.

A m

inim

al

sup

ply

volta

ge

of

2.7

V i

sre

qu

ired

in

ord

er

to e

nsu

re p

rop

er o

pe

ratio

n o

f th

ede

vice

.

3.3

Se

ria

l B

us

Inte

rfa

ce

The

se

rial

in

terf

ace

con

sist

s of

the

Chi

p S

ele

ct (

CS

),S

eria

l Clo

ck (

SC

K)

and

Ser

ial D

ata

(S

I/O)

sig

nals

. The

TC

77 m

ee

ts t

he S

PI

and

MIC

RO

WIR

E b

us s

pec

ifica

-tio

ns,

with

th

e s

eria

l int

erf

ace

des

ign

ed t

o b

e c

om

pati-

ble

with

the

Mic

roch

ip P

IC®

fam

ily o

f mic

roco

ntr

olle

rs.

The

CS

inp

ut i

s us

ed to

se

lect

the

TC

77

wh

en

mu

ltip

led

evic

es a

re c

onn

ect

ed

to t

he

seria

l cl

ock

and

da

talin

es. T

he

CS

lin

e is

als

o u

sed

to s

ynch

ron

ize

the

da

ta,

wh

ich

is w

ritte

n to

, or

read

from

, the

dev

ice

wh

en

CS

ise

qual

to

a lo

gic

‘0’ v

olta

ge.

Th

e S

CK

inpu

t is

dis

able

dw

hen

CS

is a

logi

c ‘1

’. T

he

fal

ling

edg

e o

f th

e C

S li

nein

itia

tes

com

mu

nica

tion

, w

hile

th

e r

isin

g ed

ge

of

CS

com

ple

tes

the

co

mm

unic

atio

n.

The

SC

K i

np

ut i

s p

rovi

ded

by

the

ext

ern

al m

icro

con

-tr

olle

r a

nd

is u

sed

to s

ynch

roni

ze t

he

dat

a o

n th

e S

I/O

line.

The

Te

mp

era

ture

and

Ma

nuf

act

ure

r ID

re

gis

ters

are

rea

d o

nly

whi

le th

e C

onfig

ura

tion

reg

iste

r is

a r

ead

/w

rite

reg

iste

r.

Fig

ure

3-2

pro

vide

s a

timin

g d

iagr

am o

f a

read

ope

ra-

tion

of t

he T

empe

ratu

re r

egis

ter.

Com

mu

nica

tion

with

the

TC

77 i

s in

itiat

ed

whe

n t

he

CS

goe

s to

a l

ogic

‘0

’.T

he

Ser

ial I

/O s

igna

l (S

I/O)

the

n tr

ansm

its th

e fir

st b

it of

data

. T

he m

icro

cont

rolle

r se

rial

I/O b

us

mas

ter

clo

cks

the

dat

a in

on

the

ris

ing

ed

ge o

f S

CK

. T

he f

allin

g ed

ge

of S

CK

is

then

use

d to

clo

ck o

ut

the

rest

of

the

dat

a.A

fter

14

bits

of d

ata

(th

irte

en te

mpe

ratu

re b

its a

nd B

it 2)

have

be

en tr

ansm

itted

, th

e S

I/O li

ne is

then

tri-s

tate

d.

No

te th

at C

S c

an

be

take

n to

a lo

gic

‘1’ a

t an

y tim

e d

ur-

ing

the

dat

a tr

ansm

issi

on

if o

nly

a p

ortio

n o

f the

tem

per-

atu

re

da

ta

info

rma

tion

is

req

uire

d.

Th

e T

C7

7 w

illco

mp

lete

th

e co

nve

rsio

n,

an

d th

e o

utp

ut

shift

re

gist

er

will

be

up

dat

ed

, if C

S g

oes

to th

e in

activ

e st

ate

whi

le in

the

mid

dle

of a

co

nve

rsio

n.

Fig

ure

3-3

pro

vid

es a

tim

ing

dia

gra

m o

f a

mul

ti-b

yte

com

mun

ica

tion

op

era

tion

co

nsis

ting

of

a r

ead

of t

heTe

mp

erat

ure

Dat

a r

egi

ster

, fo

llow

ed b

y a

writ

e to

the

Con

figu

ratio

n re

gis

ter.

The

fir

st 1

6 S

CK

pu

lse

s ar

eu

sed

to t

rans

mit

the

TC

77's

te

mp

era

ture

dat

a t

o t

hem

icro

con

tro

ller.

Th

e se

con

d g

rou

p o

f 1

6 S

CK

pu

lses

are

use

d t

o re

ceiv

e t

he m

icro

con

trol

ler

com

ma

nd

top

lace

the

TC

77 e

ithe

r in

Sh

utd

own

or

Con

tinu

ous

Tem

-p

era

ture

Co

nve

rsio

n m

ode

. No

te th

at t

he T

C77

is in

the

Con

tinu

ous

Tem

per

atu

re C

onve

rsio

n m

od

e a

t p

owe

r-u

p.

The

da

ta w

ritte

n t

o t

he

TC

77

’s C

onf

igur

atio

n re

gist

er

sho

uld

be

eith

er

all 0

’s o

r a

ll 1

’s,

corr

esp

ond

ing

to

eith

er

the

C

ontin

uo

us

Tem

per

atu

re

Con

vers

ion

o

rS

hutd

own

mo

de,

re

spe

ctiv

ely

. T

he T

C77

is

in S

hut

-d

own

mo

de w

hen

Bits

C0

to C

7 a

re a

ll eq

ual t

o 1

’s. T

heT

C77

will

be

in th

e C

ontin

uou

s C

onve

rsio

n m

ode

if a

‘0’

in a

ny b

it lo

catio

n f

rom

C0

to

C7

is

wri

tten

to

the

Con

figu

ratio

n re

gist

er.

Tem

pe

ratu

reB

inar

yM

SB

/ L

SB

Hex

+12

5°C

0011 1110 1000 0111

3E 8

7h

+25

°C0000 1100 1000 0111

0B 8

7h

+0.

0625

°C0000 0000 0000 1111

00

0F

h

0°C

0000 0000 0000 0111

00

07

h

-0.0

625

°C1111 1111 1111 1111

FF

FF

h

-25°

C1111 0011 1000 0111

F3

87h

-55°

C1110 0100 1000 0111

E4

87

h

TC

77

DS

20

09

2B

-pa

ge

10

2

00

2-2

01

2 M

icro

chip

Te

chn

olo

gy

Inc.

FIG

UR

E 3

-2:

Tem

pera

ture

Rea

d T

imin

g D

iag

ram

- (

Rea

ding

onl

y th

e fir

st 1

3 B

its o

f th

e

Tem

pera

ture

Reg

iste

r).

FIG

UR

E 3

-3:

Tem

pera

ture

Rea

d F

ollo

wed

By

A W

rite

To

The

Con

figu

ratio

n R

egi

ster

Tim

ing

. D

iagr

am.

It is

rec

omm

end

ed

tha

t th

e u

ser

wri

te a

ll ‘0

’s o

r a

ll ‘1

’sto

the

Co

nfig

ura

tion

reg

iste

r. W

hile

the

follo

win

g c

od

esca

n b

e t

ran

smitt

ed t

o th

e T

C77

, a

ny o

ther

cod

e m

aypu

t the

TC

77 in

to a

test

mod

e re

serv

ed b

y M

icro

chip

for

calib

ratio

n a

nd p

rod

uctio

n ve

rific

atio

n t

ests

.

•00

hex

•01

hex

•03

hex

•07

hex

•0F

hex

•1F

hex

•3F

hex

•7F

hex

•F

F h

ex

The

fo

llow

ing

com

mu

nica

tion

ste

ps c

an

be

used

to

obt

ain

the

Man

ufa

ctu

rer's

ID a

nd

pu

t th

e d

evic

e in

to th

eC

ontin

uo

us C

onve

rsio

n m

od

e. T

he M

anu

fact

ure

r’s

IDre

gis

ter

is o

nly

acc

essi

ble

fo

r a

re

ad o

per

atio

n, i

f th

eT

C77

is in

Shu

tdo

wn

mo

de.

1.

CS

go

es

low

to in

itia

te th

e c

om

mun

ica

tion

cyc

le.

2.

Re

ad

16

b

its

of

tem

per

atu

re

da

ta

fro

m

the

Tem

pera

ture

reg

iste

r.

3.

Writ

e 16

bits

of d

ata

(i.e

. XX

FF

hex

) to

the

Con

-fig

urat

ion

regi

ster

to

ente

r S

hutd

own

mo

de.

4.

Rea

d th

e 16

bits

from

the

Man

ufa

ctu

rer's

ID r

eg-

iste

r (C

15:C

8 =

54

he

x) t

o ve

rify

that

the

sen

sor

is a

Mic

roch

ip d

evi

ce.

5.

Wri

te 8

to

16

bits

of

da

ta (00

or 0000

he

x) t

oe

nte

r C

on

tinuo

us

Co

nver

sion

Mo

de.

6.

Ret

urn

CS

hig

h to

term

ina

te t

he c

omm

uni

catio

ncy

cle.

The

tim

e b

etw

een

a c

ompl

ete

te

mp

era

ture

co

nve

rsio

na

nd d

ata

tra

nsm

issi

on

is a

ppro

xim

ate

ly 3

00m

sec.

CS

CL

K

SI/

O

t CS

-SC

K

HI-

ZH

I-Z

TT

T1

211

10

T 9T 7

T 6T 5

T 4T 3

T 2T 1

T 0

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Page 32: Travaux Dirigés - hebergement.u-psud.frhebergement.u-psud.fr/villemejane/IOGS/EITI/S5-ETI/TD/ETI_1A_S5_TD... · TD Sys3 - Filtrage actif 17 TD Sys4 - Capteurs 23 TD Sys5 - Projets

19www.excelitas.com

DIGITAL DUAL ELEMENT PYROSFOR MOTIONSENSINGPYD 1788, PYD 1798 – DigiPyro®

pYroeleCtriC deteCtors For motion sensing

PYD 1788, PYD 1798 – DigiPyro®

Responsivity, min.Responsivity, typ.Match, max. NoiseField of view, horizontalField of view, verticalWLIHeightOptical element locationFilter sizeDigital DataOperating voltageSupply current

Serial interface update timeADC resolutionOutput data formatADC sensitivity ADC output offsetADC output offset, typ.

Parameter Symbol

Rmin

RMmax

N, Nmax

FoVFoV

hhe / hoX / Y

VDD

IDD

IDDmax

tREP

PYD 1798

3.34

10 78/20110°110°***4.2

3.1 / 0.75.2 / 4.2

2.7 … 3.61015

2/1314

2x146 … 7

7000 …92008192

PYD 1788

3.34

10 78/2095°90°**4.2

3 .1/ 0.74.6 / 3.4

2.7 … 3.61015

2/1314

2x146 … 7

7000 …92008192

Unit

kV/WkV/W

% µVpp

mmmmmm

VµAµAmsBitsBits

µV/countCountsCounts

Remark

f = 1 Hzf = 1 Hz

unobstructed unobstructed

Excelitas tester

VDD = 3.3 VVDD = 3.3 V

speed/interrupt

MSB first

* Standard, ** Improved, *** Excellent

applications

• Passive intrusion alarm

• Auto light switch

• Auto lamps

Features and Benefits

• TO-5 metal housing

• Digital direct link

• Different window sizes

• Excellent EMI protection

product descriptionThe DigiPyro® detector range in TO-5 housing includes 3 variations of Dual Element types, each with a different window size. The element configurations are identical, as well as the internal elec-tronic circuits. Whereas the PYD 1778 represents the lower-cost version with a small window, the PYD 1798 is provided as the superior type in terms of White Light Immunity (WLI) performance and field of view. The output signals are communicated in one 15-bit digital bit stream output via a single wire “direct link” connection to a suitable host microprocessor.

All dimensions in mm

0211-741.jb18 XLTS_CAT Infrared Sensing.indd 19 3/22/11 10:49 AM

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1A - S5 - ETI TD Sys5

Projets EITI / 2016-2017

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IOGS - Electronique pour le Traitement de l’Information Travaux Dirigés

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