Product Summary

The ICL7109IJL is a Microprocessor-Compatible A/D Converter. It is a high performance, CMOS, low power integrating A/D converter designed to easily interface with microprocessors. The ICL7109IJL provides the user with the high accuracy, low noise, low drift versatility and economy of the dual-slope integrating A/D converter. Features like true differential input and reference, drift of less than 1μV/oC, maximum input bias current of 10pA, and typical power consumption of 20mW make the ICL7109 an attractive per-channel alternative to analog multiplexing for many data acquisition applications.

Parametrics

ICL7109IJL absolute maximum ratings: (1)Positive Supply Voltage (GND to V+): +6.0V; (2)Negative Supply Voltage (GND to V-): -9V; (3)Analog Input Voltage (Either Input): V+ to V-; (4)Reference Input Voltage (Either Input): V+ to V-; (5)Digital Input Voltage: (V+) +0.3V; (6)Pins 2-27: GND -0.3V.

Features

ICL7109IJL features: (1)12-Bit Binary (Plus Polarity and Over-Range) Dual Slope Integrating Analog-to-Digital Converter; (2)Byte-Organized, TTL Compatible Three-State Outputs and UART Handshake Mode for Simple Parallel or Serial Interfacing to Microprocessor Systems; (3)RUN/HOLD Input and STATUS Output Can Be Used to Monitor and Control Conversion Timing True Differential Input and Differential Reference; (4)Low Noise; (5)Input Current (Typ):1pA; (6)Operates At Up to 30 Conversions/s; (7)On-Chip Oscillator Operates with Inexpensive 3.58MHz TV Crystal Giving 7.5 Conversions/s for 60Hz Rejection. May Also Be Used with An RC Network Oscillator for Other Clock Frequencies.

Diagrams

ICL7109IJL pin configuration

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