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LT1674 - 2uA Max, Av >=5 Quad Over-The-Top Precision Rail-to-Rail Input and Output Op Amps

The LT®1672/LT1673/LT1674 are ultralow power (IS <=2µA) decompompensated (AV >=5) op amps with precision specifications. The extremely low supply current is combineed with excellent amplifier specifications: input offset voltage is 375µV maximum with atypicaal drift of only 0.4µV/°C, input offset current is 100pA maximum. A minimum open-loop gain (AVOL) of 100V/mV ensures that gain errors are small. The devices' characteristics change little over the supply range of 2.2V to ±15V. Supply rejection is 90dB and the common mode rejection ratio is 90dB. Operation is specified for 3V, 5V and ±15V supplies. Reverse battery protection (-18V min) and inputs that operate above the positive supply make the LT1672/LT1673/LT1674 easy to use in harsh environments.

The low bias currents and offset current of the amplifier permit the use of megohm level source resistors without introducing significant errors. Voltage noise at 4µVP-P is remarkably low considering the low supply current. For unity gain stable versions of these amplifiers, see the LT1494/LT1495/LT1496.

The LT1672 is available in the 8-pin MSOP, PDIP and SO packages. The LT1673 is available in plastic 8-pin PDIP and SO-8 packages with the standard dual op amp pinout. The LT1674 is available in 14-pin PDIP and SO packages.

Features Gain of 5 Stable Low Supply Current: 2µA Max per Amplifier Rail-to-Rail Input and Output Low Offset Voltage: 375µV Max Over-The-Top™ Inputs Operate Above V+ Gain Bandwidth Product: 12kHz Wide Supply Range: 2.2V to 36V Single Supply Input Range: -0.3V to 36V Low Input Bias Current: 250pA Low Input Offset Current: 20pA High AVOL : 100V/mV Minimum Driving 100kOhms Load Output Sources and Sinks 500µA Load Current Reverse Battery Protected to 18V Typical Application

Applications Battery- or Solar-Powered Systems Portable Instrumentation Remote Sensor Amplifier Micropower Filter Photodiode Amplifier High Impedance Circuits Packaging