LT1990 Datasheet PDF

●The LT1990CS8#PBF is a micropower Precision Difference Amplifier with a very high common mode input voltage range. It has pin selectable gains of 1 or 10. The LT1990 operates over a ±250V common mode voltage range on a ±15V supply. The inputs are fault protected from common mode voltage transients up to ±350V and differential voltages up to ±500V. The LT1990 is ideally suited for both high side and low side current or voltage monitoring. On a single 5V supply, the LT1990 has an adjustable 85V input range, 70dB min CMRR and draws less than 120µA supply current. The rail-to-rail output maximizes the dynamic range, especially important for single supplies as low as 2.7V. The LT1990 is specified for single 3, 5 and ±15V supplies over both commercial and industrial temperature ranges.

● Pin selectable gain of 1 or 10

● High common mode voltage range (85V Window (VS = 5V, 0V), ±250V (VS = ±15V))

● 70dB Minimum common mode rejection ratio

● Input protection to ±350V

● 0.28% Maximum gain error

● 82dB Minimum PSRR

● High input impedance (2MR differential, 500kR common mode)

● 120µA Maximum supply current micro power

● Rail-to-rail output