11

Typical Applications

The ICL7116 and ICL7117 may be used in a wide variety of

configurations. The circuits which follow show some of the

possibilities, and serve to illustrate the exceptional versatil-

ity of these A/D converters.

The

following

application

notes

contain

very

useful

information on understanding and applying this part and

are available from Intersil Corporation.

Application Notes

NOTE #

DESCRIPTION

AnswerFAX

DOC. #

AN016

“Selecting A/D Converters”

9016

AN017

“The Integrating A/D Converter”

9017

AN018

“Do’s and Don’ts of Applying A/D

Converters”

9018

AN023

“Low Cost Digital Panel Meter Designs”

9023

AN032

“Understanding the Auto-Zero and

Common Mode Performance of the

ICL7136/7/9 Family”

9032

AN046

“Building a Battery-Operated Auto

Ranging DVM with the ICL7106”

9046

AN047

“Games People Play with Intersil’ A/D

Converters,” edited by Peter Bradshaw

9047

AN052

Converters”

9052

Typical Applications

FIGURE 11. ICL7116 USING THE INTERNAL REFERENCE

FIGURE 12. ICL7117 USING THE INTERNAL REFERENCE

28

40

39

38

37

36

35

34

33

32

31

30

29

27

26

25

24

23

22

21

OSC 1

OSC 2

OSC 3

TEST

REF HI

V+

COMMON

IN HI

IN LO

A-Z

BUFF

INT

V -

G2

C3

A3

G3

BP

100pF

= 100mV

0.1

µF

0.01

µF

1M

Ω

100k

Ω

1k

Ω

22k

Ω

IN

+

-

9V

47k

Ω

0.22

µF

0.47

µF

TO BACKPLANE

TO DISPLAY

Values shown are for 200mV full scale, 3 readings/sec., floating

supply voltage (9V battery).

+

-

Values shown are for 200mV full scale, 3 readings/sec. IN LO may

be tied to either COMMON for inputs floating with respect to

supplies, or GND for single ended inputs. (See discussion under

Analog COMMON.)

28

40

39

38

37

36

35

34

33

32

31

30

29

27

26

25

24

23

22

21

OSC 1

OSC 2

OSC 3

TEST

REF HI

V+

COMMON

IN HI

IN LO

A-Z

BUFF

INT

V -

G2

C3

A3

G3

GND

100pF

= 100mV

0.1

µF

0.01

µF

1M

Ω

100k

Ω

1k

Ω

22k

Ω

IN

+

-

47k

Ω

0.22

µF

0.47

µF

TO DISPLAY

+5V

-5V

ICL7116, ICL7117