Other Parts Discussed in Thread: INA180, INA195A-Q1
We want to measure current with a shunt resistor and INA180. Current might get to inductive loads so when switching off, we expect huge negative voltages (kV). We already placed TVS diode to limit to -24V.
Input voltage (common mode) must not be less than -0.3V. With additional (Schottky) diodes we could not limit the voltage due to high free wheeling current and therefore forward voltage goes above 0.3V.
We also had a look into INA195A-Q1 which can handle -16V. That one also needs additional protection (-24V vs -16V) and has high cost compared to INA180.
Is there a simpler/cheaper solution available?
Thank you very much for your support!