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Features
(Typical unless otherwise noted)
Guaranteed Specs at 1.8V, 2.2V, 3V, 5V, 10V
Rail-to-Rail Input Common-Mode Voltage Range
Rail-to-Rail Output Swing (within 10 mV of supply rail, @ VS=3V and RL=10 k Ohm)
Powerdown Mode IS OFF < 1.5 µA/Amplifier (Guaranteed at VS = 1.8V, 2.2V, 3V, and 5V)
Ultra Low Input Current 80 fA
High Voltage Gain (VS = 3V, RL = 10 k Ohm): 120 dB
Unity Gain Bandwidth 1.2 MHz
Description The LMC6681/2/4 is a high performance operational amplifier which can operate over a wide range of supply voltages, with guaranteed specifications at 1.8V, 2.2V, 3V, 5V, and 10V.
The LMC6681/2/4 provides an input common-mode voltage range that exceeds both supplies. The rail-to-rail output swing of the amplifier assures maximum dynamic signal range. This rail-to-rail performance of the amplifier, combined with its high open-loop voltage gain makes it unique among CMOS rail-to-rail amplifiers. The LMC6681/2/4 is an excellent choice for circuits where the common-mode voltage range is a concern.
The LMC6681/2/4 has a powerdown mode which can be controlled externally. In this powerdown mode, the supply current decreases from 700 µA per amplifier to less than 1 µA per amplifier. The LMC6684 has two powerdown options. Each of the powerdown pins disables two amplifiers.
The LMC6681/2/4 has been designed specifically to improve system performance in low voltage applications. The amplifier's 80 fA input current, 0.5 mV offset voltage, and 82 dB CMRR maintain accuracy in battery-powered systems.
Applications
Battery Operated Circuits
Sensor Amplifiers
Portable Communication Devices
Medical Instrumentation
Battery Monitoring Circuits
Level Detectors, Sample-and-Hold Circuits
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