Datasheet

Figure 2. Maxim ICL7117 Typical Operating Circuit, 200mV Reference
D
3
E
2
F
2
A
2
B
2
C
2
D
2
E
1
G
1
F
1
B
3
F
3
E
3
AB
4
POL
4
BP/GND [7116/7117]
G
3
A
3
C
3
G
2
V
-
INT
BUFF
A/Z
IN LO
IN H1
COMMON
C
-
REF
C
+
REF
A
1
B
1
C
1
D
1
HLDR
OSC
1
OSC
2
OSC
3
TEST
REF HI
V
+
0.168"
(4.27mm)
0.130"
(3.30mm)
Chip Topography
ANALOG
INPUT
ICL7117
+
-
LCD DISPLAY
V
REF
CLOSED = HOLD
OPEN = RUN
TO ANALOG
COMMON PIN
[PIN 32]
IN HI
31
IN LO
30
32
1MΩ
0.01µF
COMMON
BUFF
28
A-Z
29
INT
29
0.47µF
0.22µF
47kΩ
39
34 33
0.1µF
C+REF C-REF
OSC
2
OSC
3
OSC
1
38
C
OSC
100pF
100kΩ
40
R
OSC
SEGMENT
DRIVE
2–19
22–25
POL
BP
20
21
BACKPLANE
DRIVE
1
V
+
V
-
REF HI
35
36
26
24kΩ
10kΩ
+5V
+5V
Figure 2
ICL7116/ICL7117 3½ Digit ADCs with Display Hold
www.maximintegrated.com
Maxim Integrated │ 6