Datasheet

EL8173
Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifier

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Typical Diagram

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Key Features

95µA MaximumSupply Current
Maximum Offset Voltage

200µV (EL8170)
1000µV (EL8173)

Maximum 3nA Input Bias Current
396kHz -3dB Bandwidth (G = 10)
192kHz -3dB Bandwidth (G = 100)
Single Supply Operation

Input Voltage Range is Rail-to-Rail
Output Swings Rail-to-Rail

Pb-free (RoHS compliant)

Description

The EL8170 and EL8173 are micropower instrumentation amplifiers optimized for single supply operation over the +2.4V to +5.5V range. Inputs and outputs can operate rail-to-rail. As with all instrumentation amplifiers, a pair of inputs provide very high common-mode rejection and are completely independent from a pair of feedback terminals. The feedback terminals allow zero input to be translated to any output offset, including ground. A feedback divider controls the overall gain of the amplifier.

The EL8170 is compensated for a gain of 100 or more, and the EL8173 is compensated for a gain of 10 or more. The EL8170 and EL8173 have bipolar input devices for best offset and 1/f noise performance.

The amplifiers can be operated from one lithium cell or two Ni-Cd batteries. The EL8170 and EL8173 input range includes ground to slightly above positive rail. The output stage swings to ground and positive supply (no pull-up or pull-down resistors are needed).