ICL7621BCPA

Overview

The ICL7621BCPA is a dual, low-power CMOS operational amplifier manufactured by Harris Corporation. It features rail-to-rail output capability and operates from single supplies of 2V to 16V or dual supplies of ±1V to ±8V. Key electrical parameters include a quiescent current of 100µA per amplifier, an input bias current of 1pA, and an input offset voltage of 3mV maximum. The device offers a gain-bandwidth product of 480kHz and a slew rate of 0.016V/µs. It is housed in an 8-pin DIP package and supports an operating temperature range of 0°C to 70°C.

Feature Summary

• Ultra-low input bias current of 1pA suitable for high-impedance circuits
• Rail-to-rail output swing capability within millivolts of supply rails
• Pin-selectable quiescent current options for power optimization

Applications

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

Procurement Notes

Verify the specific suffix 'BCPA' against official Harris or Intersil documentation to confirm pinout compatibility and temperature grade. Confirm if the component is obsolete or available as a new replacement, as legacy Harris part numbers may have been transitioned to Maxim Integrated or Renesas. Ensure the package type matches the required PCB footprint before procurement.

Selection Notes

Select this component for applications requiring minimal power consumption and extremely low input bias currents. The dual configuration allows for cost-effective implementation of differential stages or dual-channel signal conditioning. Verify that the 480kHz bandwidth meets the signal frequency requirements and that the 0.016V/µs slew rate is sufficient for the intended application speed.

Part Context

The ICL7621 belongs to the ICL761X–ICL764X family of monolithic CMOS operational amplifiers originally developed by Harris Corporation and later acquired by Intersil. This family is characterized by combining ultra-low input current with low-power operation over a wide supply voltage range. The ICL7621 specifically provides two amplifiers in a single package, offering a balance between performance and power efficiency for analog signal processing tasks.

Replacement Considerations

Check for equivalents such as the ICL7621ACPA or ICL7621ECPA from Intersil/Renesas, which share the same functional specifications but may differ in temperature ranges or manufacturing lot dates. Verify cross-compatibility with other dual CMOS op-amps in the same family.