First, reverse the input pins of the second INA301-Q1 across the current-sensing resistor. The second device is now able to detect current flowing in the other direction relative to the first device.

Then, select limit resistors to set the voltage trip points by using the equations in Table 7-1. For this application example, these equations give a value of 6.25 kΩ for both limit resistors.

Connect the outputs of each device to an AND gate in order to detect if either of the limit threshold levels are exceeded. Table 8-3shows that the output of the AND gate is high if neither overcurrent limit thresholds are exceeded. A low output state of the AND gate indicates that either the positive overcurrent limit or the negative overcurrent limit are surpassed.