ICL7126 View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

ICL7126

3 1/2 Digit, Low Power, Single Chip A/D Converter

Renesas Electronics 

ICL7216

Typical Applications (Continued)

O /RANGE

U /RANGE

V+

TO LOGIC

VCC

1 V+

2 D1

3 C1

4 B1

5 A1

6 F1

7 G1

8 E1

9 D2

10 C2

11 B2

12 A2

13 F2

14 E2

15 D3

16 B3

17 F3

18 E3

19 AB4

20 POL

OSC 1 40

OSC 2 39

OSC 3 38

TEST 37

REF HI 36

REF LO 35 TO

CREF

34

LOGIC

GND

CREF 33

COMMON 32

IN HI 31

IN LO 30

A-Z 29

BUFF 28

INT 27

V- 26 V-

G2 25

C3 24

A3 23

G3 22

BP 21

CD4023 OR

74C10

CD4077

FIGURE 17. CIRCUIT FOR DEVELOPING UNDERRANGE AND OVERRANGE SIGNAL FROM ICL7126 OUTPUTS

OSC 1 40

OSC 2 39

OSC 3 38

TEST 37

REF HI 36

REF LO 35

CREF 34

CREF 33

COMMON 32

IN HI 31

IN LO 30

A-Z 29

BUFF 28

INT 27

V - 26

G2 25

C3 24

A3 23

G3 22

BP 21

TO PIN 1

180k

50pF

10F

0.1F

10k

220k

0.22F

750

180k

0.047F

10F

SCALE FACTOR ADJUST

(VREF = 100mV FOR AC TO RMS)

470k

1N914

ICL7611

5F

+

-

2.2M

1F

10k

4.3k

1F 10k 1F

0.22F

9V

100pF

(FOR OPTIMUM

BANDWIDTH)

TO DISPLAY

TO BACKPLANE

Test is used as a common-mode reference level to ensure compatibility with most op amps.

100k

AC IN

FIGURE 18. AC TO DC CONVERTER WITH ICL7126

FN3084 Rev.5.00

Oct 25, 2004

Page 13 of 15

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