ICL7126RCPL

Analog To Digital Converters (ADC) Overview

The ICL7126RCPL is a low-power, 3½-digit single-chip analog-to-digital converter (ADC) manufactured by Harris Corporation. It utilizes dual-slope integration technology and operates on a single 9V power supply with guaranteed power dissipation of less than 1mW. The device features true differential inputs and reference voltages, making it suitable for bridge-type transducer measurements. Key electrical parameters include an input bias current of 10pA maximum, zero drift of less than 1µV/°C, and noise levels below 15µV peak-to-peak. It integrates seven-segment decoders, display drivers, a clock, and a reference, allowing direct drive of LCD displays without external active components.

Analog To Digital Converters (ADC) Feature Summary

• Direct LCD Display Drive: Integrates necessary active devices including seven-segment decoders and display drivers, eliminating the need for external display driver circuits.
• Low Power Dissipation: Guaranteed power consumption of less than 1mW, with a typical supply current of 100µA, ideal for 9V battery operation.
• High Accuracy: Features auto-zero to less than 10µV, rollover error of less than one count, and zero reading for 0V input.
• Dual-Slope Conversion: Uses dual-slope integration to automatically reject interference signals common in industrial environments.

Analog To Digital Converters (ADC) Applications

• Digital panel meters for measuring voltage, resistance, and temperature.
• Battery-powered instrumentation systems requiring low power consumption.
• Bridge-type transducer measurements such as load cells and strain gauges.
• Precision null detection applications.

Analog To Digital Converters (ADC) Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and package integrity upon receipt. Check for obsolescence notices as this component may be superseded by newer models like the ICL7136. Ensure storage conditions meet CMOS IC specifications to prevent degradation.

Analog To Digital Converters (ADC) Selection Notes

Select the ICL7126RCPL for designs requiring direct LCD interface and ultra-low power consumption from a single 9V source. It serves as a pin-compatible replacement for the ICL7106, requiring only passive component adjustments. Consider the operating temperature range of 0°C to +70°C and the PDIP-40 package constraints during PCB layout.

Analog To Digital Converters (ADC) Part Context

The ICL7126 series was originally introduced by Intersil and later acquired by Maxim Integrated, which is now part of Analog Devices. The 'R' suffix typically denotes a specific tape-and-reel or packaging variant compared to the standard 'C' version, though functional characteristics remain identical. This component represents a legacy high-performance ADC solution widely used in precision measurement instruments.

Analog To Digital Converters (ADC) Replacement Considerations

The ICL7136 is an officially recommended replacement for new designs. It offers similar functionality but may require verification of pin compatibility and passive component values when substituting into existing ICL7126-based schematics.