ICL7107CMH+

ADCs/DACs - Special Purpose Overview

The ICL7107CMH+ is a monolithic 3½-digit analog-to-digital converter (ADC) designed for direct LED display driving. It integrates polarity and digit drivers, segment decoders, a voltage reference, and a clock circuit. Utilizing dual-slope conversion with a zero-integrator phase, it eliminates overrange hangover and hysteresis. The device features true differential inputs and references, ensuring high accuracy with rollover error less than one count and zero reading drift under 1µV/°C. Operating on a single +5V supply, it consumes typically 1.8mA of V+ current. The component is housed in a 44-pin PLCC package and operates within a temperature range of 0°C to +70°C.

ADCs/DACs - Special Purpose Feature Summary

• Directly drives common anode LED displays without external drive circuitry
• True differential input and reference for ratiometric measurements
• Zero-integrator phase eliminates overrange hangover and hysteresis
• Integrated clock and voltage reference reduce external component count

ADCs/DACs - Special Purpose Applications

• Digital panel meters
• Precision null detection applications
• Ratiometric bridge transducer measurements
• Industrial measurement systems requiring low noise performance

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and RoHS compliance status. Confirm availability through authorized distributors as lead times may vary. Ensure the procurement channel provides valid traceability for the Analog Devices Inc./Maxim Integrated product line.

ADCs/DACs - Special Purpose Selection Notes

Select the ICL7107 variant when interfacing with common anode LED displays; use the ICL7106 for LCD applications. This model requires a single positive supply voltage, whereas other variants may require dual supplies. Verify that the required operating temperature range aligns with the commercial grade specification of 0°C to +70°C.

ADCs/DACs - Special Purpose Part Context

This component belongs to the ICL7106/ICL7107 series of 3½-digit A/D converters originally developed by Intersil and later acquired by Maxim Integrated, now part of Analog Devices Inc. The series is characterized by its high input impedance CMOS design and ability to function as a complete measurement system with minimal external passive components.

ADCs/DACs - Special Purpose Replacement Considerations

The datasheet notes an improved second-source device available at no additional cost. Verify if alternative part numbers from the same family, such as those with different suffixes indicating package variations, are suitable substitutes based on pin compatibility.