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LMC6681

National Semiconductor
Part Number LMC6681
Manufacturer National Semiconductor
Description Low Voltage / Rail-To-Rail Input and Output CMOS
Published Apr 25, 2005
Detailed Description LMC6681 Single/LMC6682 Dual/LMC6684 Quad Low Voltage, Rail-To-Rail Input and Output CMOS Amplifier with Powerdown May 1...
Datasheet PDF File LMC6681 PDF File

LMC6681
LMC6681

Overview
LMC6681 Single/LMC6682 Dual/LMC6684 Quad Low Voltage, Rail-To-Rail Input and Output CMOS Amplifier with Powerdown May 1995 LMC6681 Single/LMC6682 Dual/LMC6684 Quad Low Voltage, Rail-To-Rail Input and Output CMOS Amplifier with Powerdown General 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.
Features (Typical unless otherwise noted) n Guaranteed Specs at 1.
8V, 2.
2V, 3V, 5V, 10V n Rail-to-Rail Input Common-Mode Voltage Range n Rail-to-Rail Output Swing (within 10 mV of supply rail, @ VS = 3V and RL = 10 kΩ) n Powerdown Mode IS OFF ≤ 1.
5 µA/Amplifier (Guaranteed at VS = 1.
8V, 2.
2V, 3V, and 5V) n Ultra Low Input Current 80 fA n High Voltage Gain (VS = 3V, RL = 10 kΩ): 120 dB n Unity Gain Bandwidth 1.
2 MHz Applications n n n n n n Battery Operated Circuits Sensor Amplifiers Portable Communication Devices Medical Instrumentation Battery Monitoring Circuits Level Detectors, Sample-and-Hold Circuits Connection Diagrams 8-...


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