This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

INA180: Input polarity design with INA180

Part Number: INA180
Other Parts Discussed in Thread: INA181

Hi team,

With INA180, is the current flow from IN+ to IN- necessary? or if the IC could also detect and output a negative polarity (current flows from IN- to IN+)?

As I saw from datasheet figure 48 that the negative differential input will be clamped to GND, want to confirm if there is ways to use the negative part?



  • Hello Max,

    Thanks for the question and using the E2E forum.

    You are correct, the INA180 was designed to detect current in one direction and the output is not capable of going beyond ground, hence only being able to monitor a positive current. How are you intending to use this device? Are you trying to detect current in both directions or are you specifically wanting to always measure a negative current?

    If you need to measure both positive and negative currents, might I suggest switching to the INA181? It is the same functionality and pinout as the INA180A, but it has the capability of measuring bi-directionally with the presence of the REF pin.

    If you still want to use the INA180, there are methods of having it measure bi-directionally, but at the cost of accuracy and additional circuitry.