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INA190-Q1: Applying voltage into IN-/+ when no supply voltage

RYO
Intellectual 2000 points
Part Number: INA190-Q1
Other Parts Discussed in Thread: INA190

Hi all,

I would like to know if it's okay for this device to apply voltage between IN- and IN+ when there is no supply voltage. Can you answer to those two questions?

  • Can you tell me if it's okay to do this?
  • Can you tell me if this happens to INA190-Q1 being enabled due to the current path from IN+/- to Vs?

In the datasheet, there is a statement of IN-/IN+ voltage that they are not related to Vs at both abs and recommended condition, so I believe that there are no current paths from IN-/+ to Vs.

Regards,
RYO

  • +1
    TI__Mastermind 31645 points

    Hello RYO,

    It is Ok to do this. There is no power sequencing requirement for the INA190 and most other current-sense amplifiers. By design the input voltage can be applied when there is no supply voltage. There is no current path from input pins to Vs.

    Hope this helps.

    Best,

    Peter