Data Sheet

ICL7106, ICL7107, ICL7107S
FN3082 Rev 9.00 Page 14 of 17
October 24, 2014
FIGURE 19. CIRCUIT FOR DEVELOPING UNDERRANGE AND
OVERRANGE SIGNAL FROM ICL7106 OUTPUTS
FIGURE 20. CIRCUIT FOR DEVELOPING UNDERRANGE AND
OVERRANGE SIGNALS FROM ICL7107 OUTPUT
FIGURE 21. AC TO DC CONVERTER WITH ICL7106
Typical Applications (Continued)
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
V+
D1
C1
B1
A1
F1
G1
E1
D2
C2
B2
A2
F2
E2
D3
B3
F3
E3
AB4
POL
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
REF LO
C
REF
C
REF
COMMON
IN HI
IN LO
A-Z
BUFF
INT
V-
G2
C3
A3
G3
BP
O/RANGE
U/RANGE
CD4023 OR
74C10
CD4077
TO LOGIC
V
CC
V+
TO
LOGIC
V-
GND
O/RANGE
U/RANGE
CD4023 OR
74C10
TO LOGIC
V
CC
+5V
V-
33kΩ
The LM339 is required to
ensure logic compatibility
with heavy display loading.
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
V+
D1
C1
B1
A1
F1
G1
E1
D2
C2
B2
A2
F2
E2
D3
B3
F3
E3
AB4
POL
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
REF LO
C
REF
C
REF
COMMON
IN HI
IN LO
A-Z
BUFF
INT
V-
G2
C3
A3
G3
BP
12kΩ
+
-
+
-
+
-
+
-
LM339
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
REF LO
C
REF
C
REF
COMMON
IN HI
IN LO
A-Z
BUFF
INT
V
-
G2
C3
A3
G3
BP
100pF
TO PIN 1
0.1µF
100kΩ
1kΩ 22kΩ
47kΩ
0.22µF
0.47µF
TO BACKPLANE
TO DISPLAY
Test is used as a common-mode reference level to ensure compatibility with most op amps.
10µF
9V
10µF
470kΩ
1µF
4.3kΩ
100pF
(FOR OPTIMUM BANDWIDTH)
1µF
10kΩ
10kΩ
1N914
1µF
0.22µF
5µF
CA3140
2.2MΩ
+
-
100kΩ
AC IN
SCALE FACTOR ADJUST
(V
REF
= 100mV FOR AC TO RMS)
+
-