ICL7611BCSA-T

Overview

The ICL7611BCSA-T is a single-channel monolithic CMOS operational amplifier from the ICL761X–ICL764X family. It features ultra-low input bias current of 1pA typical and low-power operation across a wide supply voltage range of ±1V to ±8V, or single supplies from 2V to 16V. The device offers pin-selectable quiescent currents of 10μA, 100μA, or 1000μA per amplifier. It provides rail-to-rail output swing within millivolts of the supply voltages and includes offset null capability.

Feature Summary

• Ultra-low input bias current of 1pA typical for high-impedance source applications
• Pin-selectable quiescent current settings of 10μA, 100μA, or 1000μA
• Rail-to-rail output swing capability approaching supply rails
• Internal offset nulling terminals for precision adjustment

Applications

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

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape-and-reel packaging configuration. Confirm that the 'B' designation corresponds to the specified input offset voltage parameters. Ensure compatibility with the required operating temperature range and verify lead-free status if RoHS compliance is mandatory for the target application.

Selection Notes

Select this component when extremely low input bias current is critical to minimize errors in high-impedance circuits. The programmable quiescent current allows optimization between power consumption and bandwidth requirements. Verify that the internal offset null feature meets the precision needs without requiring external circuitry adjustments beyond the standard potentiometer connection.

Part Context

This part belongs to the ICL761X–ICL764X series of single/dual/triple/quad operational amplifiers manufactured by Analog Devices Inc./Maxim Integrated. The series utilizes monolithic CMOS technology designed for low-power applications requiring high input impedance. The ICL7611 specifically denotes the single-channel variant within this comprehensive family.

Replacement Considerations

The datasheet identifies the ICL7611 as having industry-standard pinouts and being a pin-for-pin second source. Specific substitute part numbers are not explicitly listed in the provided documentation.