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).

Features

• 95µA maximum supply 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)

Applications

• Battery- or Solar-Powered Systems

• Strain Gauges

• Current Monitors

• Thermocouple Amplifiers