ICL7137CM44

ADCs/DACs - Special Purpose Overview

The Intersil ICL7137CM44 is a high-performance, low-power 3½ digit analog-to-digital converter (ADC) designed for direct interface with light-emitting diode (LED) displays. It integrates seven-segment decoders, display drivers, a precision voltage reference, and an internal clock on a single chip. The device features true differential inputs and references, ensuring accurate data conversion without requiring additional active circuits. Packaged in a 44-pin Quad Flat Package (QFP), it offers enhanced display stability and low noise performance, making it suitable for precision measurement instruments.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 3½ digit ADC with built-in seven-segment decoders and LED display drivers
• Includes on-chip precision voltage reference and clock oscillator
• True differential input and reference capabilities for high accuracy
• Low power dissipation typically less than 10mW

ADCs/DACs - Special Purpose Applications

• Digital panel meters
• Precision industrial process control instruments
• Battery-powered test equipment

ADCs/DACs - Special Purpose Part Context

The ICL7137CM44 belongs to the ICL71xx series of dual-slope integration ADCs. While the ICL7106 targets LCD interfaces with multiplexed backplane drives, the ICL7137 variant is specifically configured for direct LED display driving. This distinction eliminates the need for external driver logic, simplifying circuit design for digital readout applications.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible replacements within the same family include the ICL7107 for similar LED drive functionality. Verify that the substitute component supports the required 44-pin QFP package and meets the specific operating temperature range requirements of the original application.