1 Features

• QML Class V (QMLV), RHA, SMD

(5962R2121201VXC)

• Radiation performance

– RHA up to TID = 100krad(Si)

– ELDRS-free up to TID = 100krad(Si)

– SEL immune to LET = 75MeV×cm2 /mg

– SEE characterized to LET = 75MeV×cm2 /mg

• Common-mode voltage range: ±150V

• Minimum CMRR: 84dB from –55°C to +125°C

• DC specifications:

– Maximum offset voltage: 3500μV

– Typical offset voltage drift: 3μV/°C

– Maximum gain error: 0.047%

– Typical gain error drift: 1.5ppm/°C

– Typical gain nonlinearity: 0.0005% FSR

• AC performance:

– Small-signal bandwidth: 500kHz

– Typical slew rate: 5V/μs

• Wide supply range: ±2V to ±9V

– Maximum quiescent current: 900μA

– Output swing on ±9V supplies: ±7.5V

2 Applications

• High-voltage current sensing

• Battery cell voltage monitoring

• Power-supply current monitoring

• Motor controls

• Replacement for isolation circuits

3 Description

The INA1H94-SP is a radiation-hardened precision

unity-gain difference amplifier with a very high input

common-mode voltage range. The INA1H94-SP is a

single, monolithic device that consists of a precision

op amp and an integrated thin-film resistor network.

The INA1H94-SP can accurately measure small

differential voltages in the presence of common-mode

signals up to ±150V.

In many applications where galvanic isolation in

not required, the INA1H94-SP can replace isolation

amplifiers. The INA1H94-SP can help eliminate costly

isolated input side power supplies, along with the

associated ripple, noise, and quiescent current. The

excellent 0.0005% typical nonlinearity, high commonmode,

and 500kHz bandwidth of the INA1H94-SP

makes for a compelling sensor readout device.