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ICL7641：Single/Dual/Triple/Quad Operational Amplifiers

The ICL761X–ICL764X family of monolithic CMOS op amps combine ultra-low input current with low-power operation over a wide supply voltage range. With pinselectable quiescent currents of 10µA, 100µA, or 1000µA per amplifier, these op amps will operate from ±1V to ±8V power supplies, or from single supplies from 2V to 16V. The CMOS outputs swing to within millivolts of the supply voltages. The ultra-low bias current of 1pA makes this family of op amps ideal for long time constant integrators, picoammeters, low droop rate sample/hold amplifiers and other applications where input bias and offset currents are critical. A low noise current of 0.01pA and an input impedance of 1012Ω ensure optimum performance with very high source impedances in such applications as pH meters and photodiode amplifiers.

Key Features Pin-for-Pin Second Source 1pA Typical Bias Current—4nA (max) at +125°C ±1V to ±8V Wide Supply Voltage Range Industry-Standard Pinouts Programmable Quiescent Currents of 10µA, 100µA, and 1000µA Monolithic, Low-Power CMOS Design

ICL761X, ICL762X, ICL763X, ICL764X: Typical Operating Circuit Applications/Uses Battery-Powered Instruments Hearing Aids and Microphone Amplifiers Long-Time Constant Integrators Low Droop Rate Sample/Hold Amplifiers Low-Frequency Active Filters Low-Leakage Amplifiers Picoammeters

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