ICL7137CMH

ADCs/DACs - Special Purpose Overview

The ICL7137CMH is a low-power, 3 1/2 digit analog-to-digital converter (ADC) and display driver manufactured by Analog Devices Inc./Maxim Integrated. It integrates a dual-slope integrating ADC with a multiplexed LCD or LED display driver in a single package. The device operates on a single power supply and features an internal clock, reference voltage source, and high-impedance analog inputs. Key electrical specifications include a typical conversion rate of 3 readings per second and a quiescent supply current of approximately 60 µA. It is housed in a 44-pin QFP surface-mount package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 3 1/2 digit dual-slope integrating ADC with built-in clock and reference
• Multiplexed display driver supporting up to four digits of LCD or LED output
• Low-power operation with 60 µA supply current at 5V
• High-impedance analog input stage requiring minimal external components

ADCs/DACs - Special Purpose Applications

• Battery-powered digital panel meters
• Portable multimeters and test equipment
• Industrial process control instrumentation
• Weighing scales and force measurement systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix for the ICL7137CMH part number against official manufacturer documentation to confirm package type and temperature range. Confirm RoHS compliance status as manufacturing sources may vary. Check for active production status or obsolescence notices from Analog Devices before procurement planning.

ADCs/DACs - Special Purpose Selection Notes

Select the ICL7137CMH when a complete A/D conversion and display driving solution is required in a compact surface-mount form factor. Ensure the application requires a 3 1/2 digit resolution and can accommodate the 44-pin QFP footprint. Verify that the system power budget aligns with the device's low-current specifications.

ADCs/DACs - Special Purpose Part Context

The ICL7137CMH belongs to the ICL7137 series of integrating ADCs, which are widely used in precision measurement applications. This component represents a transition from through-hole DIP packages to surface-mount technology while maintaining the functional compatibility of the original ICL7137 architecture.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible replacements within the same package should be verified via official cross-reference lists. Alternative solutions may require redesigning the display interface if using different ADC architectures.