ICL8052A/ICL71C03, ICL8068A/ICL71C03
+5V
150Ω
5
4
3
2
1
7447
150Ω
150Ω
a
b
c
d
e
f
4.7kΩ
B
1
2
3
B
B
B
4
g
RBI
ICL71C03
+5V
V+
1
BUSY 28
1
2
3
4
5
6
7
47kΩ
1
4 / / 3 /
(LSD) D 27
1
2
2
POLARITY
RUN/HOLD
COMP IN
D
D
D
26
25
24
2
3
4
1.0µF
-15V
V-
(MSB) B 23
8
ICL8068A
INT OUT 14
2 COMP OUT +BUFF IN 13
0.22µF
REFERENCE
REF. CAP. 1
REF. CAP. 2
ANALOG IN
ANALOG GND
CLOCK IN
B
B
22
21
20
4
2
1
10µF
-15V
1 V-
8
10kΩ
SIGNAL
INPUT
9
(LSB) B
300µF
36
kΩ
10
11
12
13
14
(MSD) D 19
5
3 REF CAP
+INT IN 12
0.1µF
STROBE 18
A-Z IN 17
4 REF BYPASS -INT IN 11
10
kΩ
100
kΩ
5 GND
-BUFF IN 10
UNDER-RANGE
OVER-RANGE
16
A-Z OUT
10µF
1kΩ
6 REF OUT
BUFF OUT
V++
9
8
300
kΩ
DIGITAL GND 15
90kΩ
10kΩ
CLOCK
IN
7 REF SUPPLY
-15V
120kHz = 3
READINGS/SEC
+15V
1
NOTE: For 3 / digit, tie pin 2 low and change clock to 12kHz.
2
1
FIGURE 7. ICL8052A (8068A)/71C03A 4 / DIGIT A/D CONVERTER
2
a
a
V+
+5V
POL
3kΩ
DM8880
PROG
A
g
g
0V
RBI BI D
+5V
HI VOLTAGE BUFFER DI 505
47kΩ
5kΩ
0.02µF
0.02
µF
2.5kΩ
0.02
µF
GATES
ARE
7409
0.02
µF
0.02
µF
POL
D
D
D
D
D
B
B
B
B
5
4
3
2
1
8
4
2
1
8052A/
8068A
71C03A
FIGURE 8. ICL8052A-8068A/71C03A PLASMA DISPLAY CIRCUIT
13
ETC [ ETC ]
