The LT1990IMS8 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 LT1990IMS8 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 LT1990IMS8 is ideally suited for both high side and low side current or voltage monitoring.
On a single 5V supply, the LT1990IMS8 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 LT1990IMS8 is specified for single 3V, 5V and ±15V supplies over both commercial and industrial temperature ranges. The LT1990IMS8 is available in the 8-pin SO package.
Feature
- 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
Applications
- Battery Cell Voltage Monitoring
- High Voltage Current Sensing
- Signal Acquisition in Noisy Environments
- Input Protection
- Fault Protected Front Ends
- Level Sensing
- Isolation
(Picture: Pinout)
