ICL7611DESA

Overview

The ICL7611DESA+ is a single-channel monolithic CMOS operational amplifier from the ICL761X–ICL764X family, manufactured by Analog Devices / Maxim Integrated. It features an ultra-low input bias current of 1pA typical and operates over a wide supply voltage range of ±1V to ±8V or single supplies from 2V to 16V. The device offers programmable quiescent currents of 10μA, 100μA, or 1000μA per amplifier via the IQ pin. 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
• Programmable quiescent current selection (10μA, 100μA, or 1000μA) via the IQ pin
• Wide supply voltage operation from ±1V to ±8V or single supplies from 2V to 16V
• Rail-to-rail CMOS output swing with millivolt proximity to supply rails

Applications

• Long-time constant integrators
• Picoammeters
• Low droop rate sample/hold amplifiers
• pH meters
• Photodiode amplifiers

Procurement Notes

Verify the specific suffix 'DESA+' against official manufacturer documentation to confirm package type, temperature range, and RoHS compliance status. Ensure the ordering code matches the required industrial specifications before procurement. Confirm availability through authorized distributors as product lifecycles may change.

Selection Notes

Select this component when ultra-low input bias current and low power consumption are critical. The programmable IQ pin allows optimization between bandwidth and power dissipation. Verify that the required gain-bandwidth product and slew rate align with the chosen quiescent current setting for the specific application load.

Part Context

This part belongs to the ICL761X–ICL764X family of monolithic CMOS operational amplifiers. The family combines ultra-low input current with low-power operation. The ICL7611 variant specifically provides a single amplifier configuration with industry-standard pinouts and offset nulling capabilities.

Replacement Considerations

Check for pin-compatible second sources within the same family. Verify electrical parameters such as bias current, supply voltage range, and quiescent current settings match the original design requirements.