ICL7611DCPA

Overview

The ICL7611DCPA is a single-channel monolithic CMOS operational amplifier from the ICL761X–ICL764X family. It features an input offset voltage of 15mV maximum and operates within a 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 exhibits ultra-low bias current of 1pA typical and low noise current of 0.01pA√Hz. The output swings to within millivolts of the supply rails. It is housed in an 8-pin Plastic DIP package with a commercial temperature range of 0°C to +70°C.

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
• CMOS outputs swing to within millivolts of the supply voltages
• Input offset nulling capability via external potentiometer

Applications

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

Procurement Notes

Verify the specific ordering suffix 'DCPA' corresponds to the 15mV offset voltage grade and the 8-pin Plastic DIP package configuration. Confirm the component meets the required commercial operating temperature range of 0°C to +70°C for your application environment. Ensure compatibility with industry-standard pinouts if replacing legacy designs.

Selection Notes

Select this part when ultra-low input bias current is critical for maintaining signal integrity with high source impedances. The programmable quiescent current allows optimization between power consumption and bandwidth requirements. Verify that the 15mV maximum input offset voltage meets system accuracy specifications, as higher precision grades are available in other suffixes.

Part Context

This component belongs to the ICL761X–ICL764X series of general-purpose operational amplifiers manufactured by Analog Devices Inc./Maxim Integrated. The series combines low-power CMOS design with wide supply voltage operation. The '11' designation indicates a single amplifier configuration within the family, which also includes dual, triple, and quad variants.

Replacement Considerations

Direct pin-for-pin second sources exist within the same product family. Verify exact electrical parameter matching, particularly regarding input offset voltage and bias current specifications across different temperature ranges before substitution.