LT1787 Datasheet

• Input Offset Voltage: 75µV (Max)
• 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
• –40°C to 125°C Operating Temperature Range

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

The LT1787 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 indicates 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 full-scale 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. The LT1787 operates from 2.5V to 36V total supply voltage. The LT1787 have a PSRR in excess of 120dB.

The LT1787 draw only 60µA and are available in 8-lead SO and MSOP packages.