The LT1990 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 3V, 5V and ±15V supplies over both commercial and industrial temperature ranges. The LT1990 is available in the 8-pin SO package. Applications * Battery Cell Voltage Monitoring * High Voltage Current Sensing * Signal Acquisition in Noisy Environments * Input Protection * Fault Protected Front Ends * Level Sensing * Isolation * Pin Selectable Gain of 1 or 10 * High Common Mode Voltage Range: * 85V Window (VS = 5V, 0V) * ±250V (VS = ±15V) * Common Mode Rejection Ratio: 70dB Min * Input Protection to ±350V * Gain Error: 0.28% Max * PSRR: 82dB Min * High Input Impedance: 2MΩ Differential, 500kΩ Common Mode * Micropower: 120µA Max Supply Current * Wide Supply Range: 2.7V to 36V * –3dB Bandwidth: 100kHz * Rail-to-Rail Output * 8-Pin SO Package https://elecena.pl/product/246155/250v-input-range-g-1-10-micropower-difference-amplifier 2007-03-01 https://elecena.pl/product/246155/250v-input-range-g-1-10-micropower-difference-amplifier 2017-10-10 https://elecena.pl/product/246155/250v-input-range-g-1-10-micropower-difference-amplifier 2025-01-17