DESCRIPTION
The LT ®1787 is a complete micropower precision high side current sense amplifier. The LT1787 monitors bidirectional currents via the voltage across an external sense resistor. A current or voltage output depicts the direction and magnitude of the sense current. The LT1787 delivers greater than a 12-bit dynamic range with ultralow 40µV input offset voltage compared to a typical 250mV fullscale input voltage. A fixed gain of 8 is set by onboard precision resistors. Input signal filtering is easily implemented with a capacitor between the FIL– and FIL+ pins.

FEATURES
■ Input Offset Voltage: 75µV (Max)
■ 60V Supply Operation (LT1787HV)
■ 12-Bit Dynamic Range
■ Operating Current: 60µA
■ User-Selectable External Sense Resistor
■ Bidirectional High Side Current Sensing
■ Unidirectional or Bidirectional Output
■ Input Noise Filtering
■ Available in 8-Lead SO and MSOP Packages

APPLICATIONS
■ Battery Monitoring
■ Power Monitoring
■ Portable Phones
■ Cellular Phones
■ Portable Test/Measurement Systems
■ Battery-Operated Systems