ICL7621BESA

Overview

The ICL7621BESA is a dual operational amplifier from the ICL761X–ICL764X family, manufactured by Analog Devices Inc./Maxim Integrated. It features a monolithic CMOS design with industry-standard pinouts and an 8-pin Slim SO package. The device operates within a supply voltage range of ±1V to ±8V or single supplies from 2V to 16V. Key electrical characteristics include a typical input bias current of 1pA, a maximum input offset voltage of 5mV, and a unity-gain bandwidth of 0.044MHz at the lowest quiescent current setting.

Feature Summary

• Monolithic low-power CMOS architecture providing ultra-low input bias current
• Wide supply voltage operation supporting both dual and single power rails
• Internal frequency compensation for stable unity-gain performance
• Input offset nulling capability via dedicated terminals

Applications

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

Procurement Notes

Verify the specific suffix 'E' corresponds to the -40°C to +85°C temperature grade and 'SA' indicates the 8-pin Slim SO package configuration. Confirm RoHS compliance status as datasheets may list leaded variants alongside lead-free options. Ensure the ordering code matches the exact dual amplifier variant required for the circuit design.

Selection Notes

Select this component when high input impedance and low bias current are critical for signal integrity. The fixed quiescent current in the dual version simplifies design compared to programmable single amplifiers. Evaluate the trade-off between the low bandwidth at minimum current settings and the power consumption requirements of the target application.

Part Context

This part belongs to the ICL761X–ICL764X series of precision operational amplifiers. The family combines ultra-low input current with low-power operation, making it suitable for battery-powered instruments and high-impedance sensor interfaces like pH meters and photodiode amplifiers.

Replacement Considerations

Direct pin-for-pin second sources exist within the same product family. Verify that any substitute maintains the dual amplifier topology and compatible package dimensions.