1 Features

• Common-mode input range: ±200V (VS = ±15V)

• Protected inputs:

– ±500V Common-mode

– ±500V Differential

• Unity gain: 0.05% gain error maximum

• Nonlinearity: 0.001% maximum

• CMRR: 70dB minimum

2 Applications

• Single multi axis servo drives

• Industrial machine and machine tools

• Semiconductor test and ATE

• Ultrasound scanner

3 Description

The INA117 is a precision unity-gain difference

amplifier with very high common-mode input voltage

range. The INA117 is a single monolithic IC consisting

of a precision op amp and integrated thin-film resistor

network. The device can accurately measure small

differential voltages in the presence of commonmode

signals up to ±200V. The INA117 inputs

are protected from momentary common-mode or

differential overloads up to ±500V.

In many applications, where galvanic isolation is not

essential, the INA117 can replace isolation amplifiers.

This design can eliminate costly isolated input-side

power supplies and the associated ripple, noise,

and quiescent current. The 0.001% nonlinearity and

200kHz bandwidth of the INA117 is superior to those

of conventional isolation amplifiers.

The INA117 is available in 8-pin plastic mini-DIP

and SO-8 surface-mount packages, specified for the

–40°C to 85°C temperature range.