ICL7107CMH+TD

ADCs/DACs - Special Purpose Overview

The ICL7107CMH+TD is a monolithic 3½-digit analog-to-digital converter (ADC) designed for direct driving of common anode light emitting diode (LED) displays. It integrates polarity and digit drivers, segment decoders, a voltage reference, and a clock circuit on a single CMOS chip. The device utilizes dual-slope conversion to reject industrial interference signals and features true differential inputs and references for ratiometric measurements. Key electrical characteristics include low noise (<15µV P-P), high input impedance, and zero reading drift of less than 1µV/°C. The component operates within a temperature range of 0°C to +70°C.

ADCs/DACs - Special Purpose Feature Summary

• Direct LED Display Drive: Integrates segment decoders and drivers for common anode LED displays without external circuitry.
• Dual-Slope Conversion: Automatically rejects interference signals common in industrial environments.
• High Accuracy: Rollover error is less than one count, with zero reading drift under 1µV/°C.
• True Differential Inputs: Supports precise null detection and ratiometric measurements for bridge transducers.

ADCs/DACs - Special Purpose Applications

• Digital panel meters
• Voltage measurement systems
• Resistance and conductance testing
• Temperature monitoring devices

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific package type associated with the CMH suffix against official documentation, as standard listings often cite PLCC or PDIP variants. Confirm RoHS compliance status indicated by the plus sign (+). Ensure the supplier provides valid traceability for this Analog Devices/Maxim Integrated component before finalizing acquisition.

ADCs/DACs - Special Purpose Selection Notes

Select the ICL7107 variant specifically when a common anode LED display is required, as opposed to the ICL7106 which drives LCDs. Ensure the application requires a 3½-digit resolution and benefits from the integrated clock and reference capabilities. Verify that the power supply constraints align with the specified operating voltages for the LED driver section.

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 later acquired by Maxim Integrated, now part of Analog Devices. The series is known for its high input impedance and ability to eliminate overrange hangover effects through a dedicated zero-integrator phase.

ADCs/DACs - Special Purpose Replacement Considerations

The ICL7106 serves as the functional counterpart for LCD applications. Other members of the family include ICL7107CPL and ICL7107CQH. Verify pin compatibility and display interface requirements when substituting with other packages in the same series.