ICL7109 12-Bit Micro Compatible A/D Converter Datasheet

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Product Details

12-Bit Binary Dual Slope Integrating Analog-to-Digital Converter
Byte-Organized, TTL Compatible Three-State Outputs
RUN/HOLD Input and STATUS Output Can Be Used to Monitor and Control Conversion Timing
True Differential Input and Differential Reference
Operates At Up to 30 Conversions/s

Pin Layout

Pin Description

Pin Number	Description
1	GND - Digital Ground
2	STATUS - Status of Analog Conversion
3	POL - Polarity
4	OR - Overrange
5	B12 - Output Bit (Most Significant)
6	B11 - Output Bit
7	B10 - Output Bit
8	B9 - Output Bit
9	B8 - Output Bit
10	B7 - Output Bit
11	B6 - Output Bit
12	B5 - Output Bit
13	B4 - Output Bit
14	B3 - Output Bit
15	B2 - Output Bit
16	B1 - Output Bit (Least Significant)
17	TEST - Test Function
18	LBEN - Low Byte Enable
19	HBEN - High Byte Enable
20	CE/LOAD - Chip Enable/Load
21	MODE - See Datasheet
22	OSC IN - Oscillator Input
23	OSC OUT - Oscillator Output
24	OSC SEL - Oscillator Select
25	BUF OSC OUT - Buffered Oscillator Output
26	RUN/HOLD - A/D Conversion
27	SEND - Data Send Signal Input
28	V- - Analog Negative Supply
29	REF OUT - Reference Voltage Output
30	BUFFER - Buffer Amplifier Output
31	AUTO-ZERO - Auto-Zero Mode
32	INTEGRATOR - Integrator Output
33	COMMON - Analog Common
34	INPUT LO - Differential Input Low
35	INPUT HI - Differential Input High
36	REF IN + - Differential Input Reference (Positive)
37	REF CAP + - Reference Capacitor (Positive)
38	REF CAP - - Reference Capacitor (Negative)
39	REF IN - - Differential Input Reference (Negative)
40	V+ - Positive Supply Voltage

Dimensional Drawing

Technical Data

Datasheet

Intersil - Datasheet for ICL7109

Application Notes

The Integrating A/D Convertor
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Tips For Using Single Chip 3 1/2 Digit A/D Converters
Overcoming Common Mode Range Issues When Using Intersil Integrating Converters