INA225 Current Shunt Monitors

Texas Instruments INA225 Current Shunt Monitors are a voltage-output, current-sense amplifier that senses drops across current-sensing resistors at common-mode voltages. These can vary from 0V to 36V, independent of the supply voltage. These are a bidirectional, current-shunt monitors that allow an external reference to be used to measure current flowing in both directions across a current-sensing resistor. Four discrete gain levels are selectable using the two gain-select terminals to program gains of 25V/V, 50V/V, 100V/V, and 200V/V. The low-offset, zero-drift architecture and precision gain values enable current-sensing with maximum drops across the shunt as low as 10mV of full-scale. This is done while maintaining very high accuracy measurements over the entire operating temperature range.