ICL7611BCPA

Overview

The ICL7611BCPA is a single operational amplifier from the ICL761X–ICL764X family, manufactured by Analog Devices Inc./Maxim Integrated. It utilizes monolithic CMOS technology and features pin-selectable quiescent currents of 10μA, 100μA, or 1000μA. The device operates on supply voltages ranging from ±1V to ±8V or single supplies from 2V to 16V. Key electrical specifications include a maximum input offset voltage of 5mV, a typical bias current of 1pA, and a unity-gain bandwidth of 0.044MHz at the lowest current setting. 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 for high-impedance source applications
• Pin-selectable quiescent current for power-bandwidth optimization
• Rail-to-rail output swing capability within millivolts of supply rails
• Internal frequency compensation for stable unity-gain operation

Applications

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

Procurement Notes

Verify that the ordering suffix 'CPA' corresponds to the 8-pin Plastic DIP package and the 'B' grade indicates a 5mV maximum input offset voltage. Confirm the temperature range matches the C series specification (0°C to +70°C). Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability, as this is an active part number within the Maxim Integrated portfolio.

Selection Notes

Select this component when ultra-low input bias current is critical for maintaining signal integrity in high-impedance circuits. The B-grade offset voltage suits applications requiring moderate precision without the cost of A-grade parts. Consider the programmable IQ feature if dynamic adjustment between low-power standby and higher-speed operation is required within the system design constraints.

Part Context

This part belongs to the ICL761X–ICL764X family of monolithic CMOS operational amplifiers. The family includes single, dual, triple, and quad configurations. The ICL7611 specifically denotes a single amplifier unit. The 'BCPA' designation identifies the specific performance grade, temperature range, and packaging format within this extensive product line designed for low-power analog signal processing.

Replacement Considerations

The datasheet lists the ICL7611ACPA and ICL7611DCPA as pin-compatible alternatives within the same family. These variants offer different input offset voltage grades (2mV and 15mV respectively) while maintaining identical pinouts and general functionality.