ICL7621DCSA+

Overview

The ICL7621DCSA+ is a dual-channel monolithic CMOS operational amplifier from the ICL761X–ICL764X family. It features ultra-low input bias current of 50 pA maximum and operates over a wide supply voltage range of ±1V to ±8V or single supplies from 2V to 16V. The device utilizes an 8-pin SOIC surface-mount package with a commercial operating temperature range of 0°C to +70°C. Key electrical characteristics include a unity-gain bandwidth of 44 kHz, a slew rate of 16 mV/µs, and an input offset voltage of 15 mV maximum.

Feature Summary

• Monolithic low-power CMOS design providing ultra-low input bias current for high-impedance source applications
• Wide supply voltage operation supporting both split and single power rails
• Rail-to-rail output swing capability approaching supply voltages under light loads

Applications

• Long time constant integrators
• Picoammeters
• Low droop rate sample/hold amplifiers
• pH meters and photodiode amplifiers

Procurement Notes

Verify that the ordering suffix matches the specific package and temperature grade requirements. Confirm RoHS compliance status as indicated in official documentation. Ensure the component is sourced from authorized distributors to guarantee authenticity. Check for any specific handling instructions related to the CMOS technology used in this operational amplifier series.

Selection Notes

Select this component when extremely low input bias currents are critical for signal integrity. The fixed quiescent current setting suits applications where bandwidth requirements do not exceed 44 kHz. Consider the 8-pin SOIC package constraints for PCB layout. Evaluate if the commercial temperature range meets the environmental conditions of the target system.

Part Context

This part belongs to the ICL761X–ICL764X family of operational amplifiers manufactured by Analog Devices / Maxim Integrated. The family includes single, dual, triple, and quad configurations. The ICL7621 specifically denotes the dual-channel variant within this lineup, designed for general-purpose low-power analog signal processing tasks requiring minimal input current draw.

Replacement Considerations

Check for pin-compatible alternatives within the same manufacturer's portfolio. Verify that substitute parts maintain equivalent input bias current specifications and supply voltage ranges. Ensure the replacement offers compatible packaging dimensions for existing board layouts.