ICL7107CPL+

ADCs/DACs - Special Purpose Overview

The ICL7107CPL+ is a monolithic 3½-digit analog-to-digital converter (ADC) designed for direct LED display drive. 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 reference, ensuring high accuracy with rollover error less than one count and zero reading drift under 1µV/°C. Operating on a single +5V supply within the commercial temperature range of 0°C to +70°C, it offers low noise (<15µVP-P) and high input impedance.

ADCs/DACs - Special Purpose Feature Summary

• Directly drives common anode LED displays without external driver circuitry
• Dual-slope conversion technique with zero-integrator phase for high accuracy
• True differential input and reference for ratiometric measurements
• Integrated clock and voltage reference reducing external component count

ADCs/DACs - Special Purpose Applications

• Digital panel meters
• Voltage measurement systems
• Resistance and bridge transducer measurements
• Temperature and pressure sensing interfaces

ADCs/DACs - Special Purpose Procurement Notes

Verify the 'Maxim Advantage' status, which indicates upgraded quality levels and tighter test specifications compared to standard sources. Confirm RoHS compliance via the '+' suffix in the part number. Ensure the package type matches the required PCB footprint, as this specific model uses a 40-pin PDIP housing.

ADCs/DACs - Special Purpose Selection Notes

Select the ICL7107 variant specifically for common anode LED displays; use the ICL7106 for LCD applications. This model requires a single +5V supply, whereas other variants may need dual supplies. Verify that the application does not require multiplexed LCD backplane driving, as this function is exclusive to the ICL7106 series.

ADCs/DACs - Special Purpose Part Context

This component belongs to the ICL7106/ICL7107 family of 3½-digit A/D converters originally developed by Intersil and now manufactured by Maxim Integrated (Analog Devices). The ICL7107CPL+ represents the lead-free, RoHS-compliant version of the standard ICL7107CPL in a 40-pin plastic dual in-line package.

ADCs/DACs - Special Purpose Replacement Considerations

Standard replacements include the ICL7107CPL (non-RoHS) or ICL7107CM44Z (MQFP package). Cross-vendor equivalents from Intersil or Renesas are functionally compatible but require verification of pinout orientation and electrical tolerances against the Maxim datasheet.