LT1990-10 Datasheet

• Gain = 10
• –3dB Bandwidth = 100kHz
• High Common Mode Voltage Range:
  • ±250V (VS = ±15V)
  • 85V Window (VS = 5V, 0V)
• Common Mode Rejection Ratio: 60dB Min
• Input Protection to ±350V
• Gain Error: 0.8% Max
• PSRR: 82dB Min
• High Input Impedance: 2MΩ Differential, 500kΩ Common Mode
• Micropower: 180µA Max Supply Current
• Wide Supply Range: 2.7V to 36V
• Rail-to-Rail Output
• 8-pin SO and pin FMEA Compatible MSOP Packages

• Battery Cell Voltage Monitoring
• High Voltage Current Sensing
• Signal Acquisition in Noisy Environments
• Input Protection
• Fault Protected Front Ends
• Level Sensing
• Isolation

The LT^®1990-10 is a micropower precision difference amplifier with a very high common mode input voltage range, a fixed gain of 10 and 100kHz bandwidth. The LT1990-0 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 LT1990-10 is ideally suited for both high side and low side current or voltage monitoring.

On a single 5V supply, the LT1990-10 has an adjustable 85V input range, 60dB min CMRR and draws less than 180µA supply current. The rail-to-rail output maximizes the dynamic range, especially important for single supplies as low as 2.7V.

The LT1990-10 is specified for single 3V, 5V and ±15V supplies over the industrial temperature range.

The LT1990-10 is available in the 8-pin SO and pin FMEA compatible MSOP packages.