icl8068a Intersil Corporation, icl8068a Datasheet - Page 2

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

Functional Block Diagram
10µF
ANALOG
INPUT
ANALOG
GND
10kΩ
0.1µF
10kΩ
REF
300pF
OUT
REF
1kΩ
CAP 1
10
11
7
REF
6
3
+15V
5
4
REF.
INT.
8
10kΩ
8
5
-15V
7
1
10µF (TYP)
1
+BUF IN
CAP 2
10
-BUF IN
BUFFER
2
+
-
+5V
90kΩ
REF
A1
6
1
2
ICL8052A/8068A
13
ICL8052A/ICL71C03, ICL8068A/ICL71C03
9
BUF OUT
9
+INT IN
AZ OUT
100kΩ
ICL71C03
15
11
12
INTEG.
16
SW3
-INT IN
0.22µF
-
+
A2
AZ IN
1µF (TYP)
-15V
-1.2V
6
17
14
INT OUT
COMP IN
COMP.
+
-
CROSSING
DETECTOR
A3
COMP
FIGURE 1.
ZERO
OUT
HOLD
RUN/
2
5
4
LATCH
3
CLOCK
IN
MSD
D
19
12
5
4 1/2 DIGIT/
3 1/2 DIGIT
LATCH
24
D
4
2
CONTROL LOGIC
MULTIPLEXER
LATCH
RANGE
D
25
OVER
3
COUNTERS
14
RANGE
UNDER
26
D
2
LATCH
13
STROBE
D
27
1
18
LSD
LATCH
SEGMENT
DECODER
SEVEN-
BUSY
28
20
21
22
23
B
B
B
B
1
2
3
4