ZHCSG77F April 2017 – March 2019 INA181 , INA2181 , INA4181
PRODUCTION DATA.
The INA181 senses 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. The output voltage of the current-sense amplifier is shown in Equation 1.
where