icl8068a Intersil Corporation, icl8068a Datasheet - Page 15

• Manufacturer Part Number: icl8068a
• Description: Precision 4 1/2 Digit, A/d Converter
• Manufacturer: Intersil Corporation

300kΩ
INPUT
36kΩ
-15V
100kΩ
0.1µF
1µF
-15V
ANALOG GND
+5V
10kΩ
5kΩ
10
11
12
13
14
1
2
3
4
5
6
7
8
9
-15V
300µF
V+
41/2 / 31/2
POL
R/H
COMP IN
V-
REF
REF. CAP. 1
REF. CAP. 2
INPUT
ANALOG GND
CLOCK
UR
OR
15
10µF
1
2
3
4
5
6
7
ICL71C03
ICL8052A/ICL71C03, ICL8068A/ICL71C03
ICL8052A
8068A
+5V
1.0µF
0V
DIG GND
STROBE
A-Z OUT
A-Z IN
BUSY
D
D
D
D
B
B
B
B
D
1
7
1
2
3
4
8
4
2
1
5
FIGURE 10. DRIVING LCD DISPLAYS
16
14
13
12
11
10
9
8
8
28
27
26
25
24
23
22
21
20
19
18
17
16
15
15
13
CD4054A
0V
0.22µF
14 12 5 3 4
11 10 9 2 6
100kΩ
+15V
CLOCK IN (120kHz = 3 READINGS/SEC)
4
1
/
2
DIGIT LCD DISPLAY
0V
BACKPLANE
5 BP
31 D
32 D
33 D
34 D
30 B
29 B
28 B
27 B
35 V-
ICM7211A
1
2
3
4
3
2
1
0
OSC 36
37 - 40
2, 3, 4
6 - 26
V+ 1
28 SEGMENTS
D
1
- D
CAPACITOR
22-100pF
OPTIONAL
+5V
4
+5V