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Part Name
Description
ICL7126 View Datasheet(PDF) - Intersil
Part Name
Description
Manufacturer
ICL7126
3 1/2 Digit, Low Power, Single Chip A/D Converter
Intersil
ICL7126 Datasheet PDF : 15 Pages
First
Prev
11
12
13
14
15
Typical Applications
(Continued)
O /RANGE
U /RANGE
ICL7126
V+
TO LOGIC
V
CC
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
C
REF
34
LOGIC
GND
C
REF
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
TO PIN 1
180k
Ω
50pF
10
µ
F
REF HI 36
REF LO 35
C
REF
34
C
REF
33
COMMON 32
0.1
µ
F
10k
Ω
220k
Ω
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V - 26
0.22
µ
F
750
Ω
180k
Ω
0.047
µ
F
10
µ
F
SCALE FACTOR ADJUST
(V
REF
= 100mV FOR AC TO RMS)
470k
Ω
1N914
ICL7611
5
µ
F
+
-
100k
Ω
2.2M
Ω
1
µ
F
10k
Ω
4.3k
Ω
1
µ
F 10k
Ω
1
µ
F
0.22
µ
F
9V
100pF
(FOR OPTIMUM
BANDWIDTH)
G2 25
C3 24
A3 23
TO DISPLAY
G3 22
BP 21
TO BACKPLANE
Test is used as a common-mode reference level to ensure compatibility with most op amps.
AC IN
FIGURE 18. AC TO DC CONVERTER WITH ICL7126
13
FN3084.5
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