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.