ICL7621ACSA

Overview

The ICL7621ACSA+ is a dual CMOS operational amplifier from the ICL761X–ICL764X family, manufactured by Analog Devices Inc. (formerly Maxim Integrated). It features ultra-low input bias current and low-power operation over a wide supply voltage range. The device operates from ±1V to ±8V power supplies or single supplies from 2V to 16V. Key electrical parameters include a typical bias current of 1pA, a gain-bandwidth product of 480 kHz, and a slew rate of 160 mV/us. It is housed in an 8-pin SOIC package.

Feature Summary

• Monolithic CMOS design combining ultra-low input current with low-power operation
• Wide supply voltage range supporting both dual and single supply configurations
• CMOS outputs swing to within millivolts of the supply voltages

Applications

• Long time constant integrators
• Picoammeters
• Low droop rate sample/hold amplifiers
• Battery-powered instruments

Procurement Notes

Verify the specific suffix against official datasheets, as ordering codes may vary by manufacturer generation. Confirm RoHS compliance status for the exact part number variant. Check availability through authorized distributors, noting that some variants may be discontinued or have limited stock. Ensure the package type matches the PCB footprint requirements before procurement.

Selection Notes

Select this component for applications requiring high input impedance and minimal power consumption. The dual configuration allows for cost-effective implementation of differential circuits. Consider the wide supply voltage flexibility for systems operating on varying battery levels. Verify that the 480 kHz bandwidth meets the signal frequency requirements of the target application.

Part Context

This part belongs to the ICL761X–ICL764X family of monolithic CMOS operational amplifiers originally developed by Maxim Integrated and now managed by Analog Devices. The family is characterized by pin-selectable quiescent currents and industry-standard pinouts, facilitating drop-in replacements for legacy designs requiring low leakage and low power.

Replacement Considerations

Check for pin-compatible second sources within the same family. Verify that substitute parts maintain the 1pA typical bias current specification. Ensure the replacement supports the required ±1V to ±8V supply range.