ICL7106CQH+TD

ADCs/DACs - Special Purpose Overview

The ICL7106CQH+TD is a monolithic 3½-digit analog-to-digital converter (ADC) manufactured by Maxim Integrated. It integrates polarity and digit drivers, segment decoders, a voltage reference, and a clock circuit, eliminating the need for external display drive circuitry. Designed for LCD applications, it features high-impedance CMOS differential inputs and dual-slope conversion technology to reject industrial interference. The device guarantees first reading recovery from overrange conditions and minimizes rollover error to less than one count. Operating within a temperature range of 0°C to +70°C, it utilizes a 44-pin PLCC package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated LCD Display Drive: Includes multiplexed backplane drive for non-multiplexed liquid crystal displays without external components.
• Dual-Slope Conversion: Automatically rejects common-mode interference signals typical in industrial environments.
• High Accuracy: Features zero reading drift of less than 1µV/°C and rollover error of less than one count.
• True Differential Inputs: Supports ratiometric measurements for bridge transducers and ohms sensing.

ADCs/DACs - Special Purpose Applications

• Digital Panel Meters
• Precision Null Detection
• Bridge Transducer Measurement
• Ratiometric Resistance Sensing

ADCs/DACs - Special Purpose Procurement Notes

Verify that the suffix 'TD' corresponds to the specific tape-and-reel packaging configuration as defined in the manufacturer's ordering information. Confirm RoHS compliance status associated with the '+' designation. Ensure the 44-pin PLCC footprint matches the target PCB land pattern specifications provided in the package outline document No. 21-0049.

ADCs/DACs - Special Purpose Selection Notes

Select this model for applications requiring direct LCD interfacing rather than LED driving, which requires the ICL7107 variant. The 44-pin PLCC package is suitable for designs prioritizing surface-mount density over through-hole mounting options like PDIP. Verify that the single-supply operation constraints align with the system power architecture, as the device requires specific supply voltage ranges for proper ADC functionality.

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. The ICL7106 specifically targets LCD-based instrumentation, distinguishing itself from the ICL7107 which drives common-anode LEDs. The series is characterized by its high integration level, reducing external passive component counts while maintaining precision measurement capabilities.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible replacements include other ICL7106 variants such as ICL7106CPL+ (PDIP package). Cross-manufacturer equivalents may exist but require verification of electrical characteristics, particularly input leakage current and display drive voltage levels, to ensure functional parity.