ICL7117CMH+D

ADCs/DACs - Special Purpose Overview

The ICL7117CMH+D is a low-power, 3 1/2 digit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. under the Maxim Integrated brand. It integrates a dual-slope integrating ADC core with an LED display driver and controller in a single package. The device operates on a single power supply and features a built-in reference voltage source and clock oscillator. Designed for direct interfacing with seven-segment LED displays, it eliminates the need for external multiplexing logic or separate drivers. The component utilizes a QFP-44 surface-mount package to provide a compact solution for digital panel meters and industrial instrumentation applications requiring high accuracy and low power consumption.

ADCs/DACs - Special Purpose Feature Summary

• Integrates a 3 1/2 digit dual-slope A/D converter with a dedicated LED display driver and controller
• Includes internal precision reference voltage source and system clock oscillator
• Provides direct drive capability for common-anode seven-segment LED displays without external logic

ADCs/DACs - Special Purpose Applications

• Digital panel meters for industrial process control
• Battery-powered portable test equipment
• Low-cost digital multimeters
• Temperature monitoring systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'CMH+D' against the manufacturer's current datasheet to confirm pinout compatibility and RoHS compliance status. Ensure the design accounts for the QFP-44 thermal requirements and moisture sensitivity level during assembly. Cross-reference the base product number ICL7117 with official replacement guides if sourcing from secondary distributors.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a combined ADC and display driver is required to minimize bill of materials and board space. It is suitable for applications where moderate speed and high resolution are prioritized over rapid sampling rates. Consider the single-supply operation and low quiescent current for battery-operated designs. Verify that the target application supports the driving capabilities for the intended LED segment count and brightness levels.

ADCs/DACs - Special Purpose Part Context

This part belongs to the ICL71xx family of integrating ADCs, which are industry standards for high-resolution DC measurements. The ICL7117 variant specifically targets LED display outputs, distinguishing it from LCD variants like the ICL7106. The CMH+D designation indicates a lead-free, halogen-free version housed in a 44-pin plastic quad flat package, aligning with modern environmental manufacturing standards.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers: ICL7137CMH+D.