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INA286: Quiescent Current and no power supply conditions

Vincent Li00
Intellectual 2035 points

Part Number: INA286

Hi Guys

Our customer will use our INA286  as high side current sense. Typical common mode voltage is 48V. But we have some questions:

1. If we power off our device, but the main power voltage is high voltage 48V. So at this no power supply conditions, do you think whether it will damage our device when power up INA286 or operation?

2. If we have no power supply, how much quiescent current will our device have? 900uA? 500uA? or lower?

Thanks

-Pengfei

  • 0
    TI__Mastermind 36080 points

    Hi Pengfei,

    1 No – the common mode input voltage of 48V will not damage the INA286 in the absence of supply. This is a common property among all our current sense amplifiers.

    2 Maybe I did not understand this question accurately, but when there is no power supply, there is no quiescent current to speak of. In other words it is ideally 0uA. In reality there is going to be some uA current draw from each of the two input pins. This current is most likely on the order of a couple 10’s of uA or smaller.

    Regards, Guang