ICL7611DESA-T

Overview

The ICL7611DESA-T is a single-channel monolithic CMOS operational amplifier from the ICL761X–ICL764X family, manufactured by Analog Devices Inc./Maxim Integrated. It features ultra-low input bias current of 1pA typical and programmable quiescent currents of 10μA, 100μA, or 1000μA per amplifier. The device operates from ±1V to ±8V dual supplies or 2V to 16V single supplies. Key electrical parameters include a unity-gain bandwidth of 0.044MHz at 10μA IQ, a slew rate of 0.016V/µs at 10μA IQ, and an input offset voltage of 15mV maximum for the D grade. It is housed in an 8-pin SOIC package with an operating temperature range of -40°C to +85°C.

Feature Summary

• Ultra-low input bias current of 1pA typical ensures minimal loading on high-impedance sources.
• Programmable quiescent current allows optimization between power consumption and performance metrics like bandwidth and slew rate.
• CMOS outputs swing to within millivolts of supply rails, enabling full dynamic range utilization.
• Monolithic low-power CMOS design provides industry-standard pinouts for easy integration.

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 as documented by the manufacturer. Confirm that the 'D' grade designation corresponds to the required input offset voltage specifications for your application. Ensure compatibility with the -40°C to +85°C industrial temperature range. Check for any recent product change notices regarding manufacturing location or material composition updates.

Selection Notes

Select this component when ultra-low input bias current is critical for signal integrity. Choose the appropriate quiescent current setting based on the required bandwidth and slew rate versus power budget. Verify that the 15mV maximum input offset voltage meets system accuracy requirements. Consider the 8-SOIC package constraints for PCB layout and thermal management.

Part Context

This part belongs to the ICL761X–ICL764X series of single/dual/triple/quad operational amplifiers. The ICL7611 specifically denotes a single-channel configuration within this family. The 'DESA+' variant typically refers to the lead-free version in tube packaging, while the '-T' suffix indicates tape and reel packaging for automated assembly.

Replacement Considerations

The datasheet mentions it is a pin-for-pin second source for other devices. Specific substitute part numbers are not explicitly listed in the provided documentation. Consult the manufacturer's official replacement guide for verified alternatives.