FEATURES
* 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

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

DESCRIPTION
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 LT1990-10
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.