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INA230: BUS pin input impedance tolerance and negative voltage on IN- pin

Christopher Arntzen
Intellectual 630 points
Part Number: INA230

Hello,

I have two questions regarding the INA230:

  1. Can you provide a tolerance on the BUS pin input impedance?  The datasheet only lists 830k ohms with no min or max values.
  2. I am implementing low-side sensing and would like to connect the GND pin to the IN+ pin, which will result in a negative voltage at the IN- pin (about -12mV).  I know this is safe for the part per the Absolute Maximum Ratings, but will the differential voltage be read correctly by the ADC in this configuration?

Thanks,

Chris