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.