ICL7129_00 Datasheet, PDF (2/10 Pages) Intersil Corporation – 4½ Digit LCD, Single-Chip A/D Converter

Functional Block Diagram
ICL7129
LOW BATTERY CONTINUITY
OSC1
SEGMENT DRIVES
BACKPLANE
DRIVES
ANNUNCIATOR DRIVE
LATCH, DECODE DISPLAY MULTIPLEXER
V_DISP
OSC2
OSC3
UP/DOWN RESULTS COUNTER
SEQUENCE COUNTER/DECODER
CONTROL LOGIC
ANALOG SECTION
RANGE L/H CONT
V+
V- DGND
Typical Application Schematic
LOW BATTERY CONTINUITY
OR UR DP₂ DP₁
DP₃ DP₃
V+
5pF (MICA)
ICL7129
120kHz
560pF
1.2kΩ
0.1µF
+
1.0µF
150kΩ
+
10kΩ
9V
-
20K
0.1µF
100kΩ
-
+
V_IN
ICL8069
270K
10pF (MICA)
V+
6.8µF
2