SBOS318B April 2019 – July 2021 INA186
The INA186 devices that feature a REF pin can sense current flow through a sense resistor in both directions. The bidirectional current-sensing capability is achieved by applying a voltage at the REF pin to offset the output voltage. A positive differential voltage sensed at the inputs results in an output voltage that is greater than the applied reference voltage. Likewise, a negative differential voltage at the inputs results in output voltage that is less than the applied reference voltage. Use Equation 1 to calculate the output voltage of the current-sense amplifier.