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
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