ICL7621ACPA

Overview

The ICL7621ACPA is a dual low-power CMOS operational amplifier manufactured by Analog Devices Inc./Maxim Integrated. It features a gain-bandwidth product of 44 kHz and a slew rate of 16 mV/us. The input offset voltage is 2 mV, with an input bias current of 50 pA. Operating from single supplies of 2 V to 16 V or dual supplies of ±1 V to ±8 V, it draws 15 uA per amplifier. The device offers a common-mode rejection ratio of 66 dB and operates within a commercial temperature range of 0°C to +70°C in an 8-pin PDIP package.

Feature Summary

• Monolithic CMOS design providing ultra-low input bias current for precision applications
• Wide supply voltage range supporting both single and dual power configurations
• CMOS outputs swing to within millivolts of the supply rails

Applications

• Long time constant integrators
• Picoammeters
• Low droop rate sample/hold amplifiers

Procurement Notes

Verify component authenticity through authorized distributors as this part may be discontinued. Confirm RoHS compliance status and lead-free availability prior to procurement. Ensure the specific suffix matches required packaging and environmental standards. Cross-reference datasheet revisions to confirm pinout and electrical parameter consistency with existing designs.

Selection Notes

Select this component for circuits requiring minimal quiescent current and high input impedance. The dual configuration reduces board space compared to single-channel alternatives. Verify that the 44 kHz bandwidth meets signal frequency requirements. Consider thermal management within the commercial operating range if ambient temperatures approach upper limits.

Part Context

This device belongs to the ICL761X–ICL764X family of monolithic CMOS operational amplifiers. The family combines ultra-low input current with low-power operation across a wide supply voltage range. Pin-selectable quiescent currents allow optimization for specific power constraints while maintaining industry-standard pinouts for compatibility.

Replacement Considerations

Direct substitutes include the ICL7621ACPA+ variant from Analog Devices/Maxim Integrated. Verify pin compatibility and electrical specifications before substitution. Other members of the ICL761X series may offer similar functionality but require validation of channel count and performance metrics.