ICL7117CMH

ADCs/DACs - Special Purpose Overview

The ICL7117CMH is a low-power, 3 1/2 digit analog-to-digital converter (ADC) with an integrated LCD display driver. Manufactured by Analog Devices Inc./Maxim Integrated, it operates within a supply voltage range of 3V to 5.5V and consumes a maximum supply current of 1.8 mA. The device features a dual-slope integration architecture for high noise rejection and includes a built-in reference voltage source. It is housed in a 40-pin PDIP package and supports an operating temperature range from 0°C to +70°C.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 3 1/2 digit ADC with direct LCD drive capability
• Low power consumption with max supply current of 1.8 mA
• Built-in reference voltage source eliminates external components
• High noise rejection via dual-slope integration technique

ADCs/DACs - Special Purpose Applications

• Portable battery-powered instrumentation
• Digital panel meters
• Industrial process control displays
• Precision measurement equipment

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'CMH' corresponds to the 40-pin PDIP package and commercial temperature grade (0°C to +70°C). Confirm RoHS compliance status through official manufacturer documentation or authorized distributor declarations, as '+D' or other suffixes may indicate lead-free variants. Check for active production status or obsolescence notices directly from Analog Devices.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a monolithic solution combining ADC and LCD driver is required to reduce board space. Ensure the application requires a 3 1/2 digit resolution and can accommodate the 40-pin PDIP footprint. Compare against the ICL7137 series if LED display driving is needed instead of LCD, noting that the ICL7137 typically uses a QFP package.

ADCs/DACs - Special Purpose Part Context

The ICL7117 belongs to the ICL71xx family of precision A/D converters, which are industry standards for low-cost, high-accuracy digital conversion. It serves as a direct replacement for older CMOS equivalents like the ICM7117. The CMH suffix specifically denotes the plastic DIP packaging variant suitable for through-hole assembly.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible substitutes include the ICM7117CPL+ and TC7117. Verify package compatibility (PDIP-40 vs PLCC-44) and temperature range specifications before substitution.