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INA280-Q1: VCM switched off while VS = 5V whats the expected behavior

Jesús Angarita
Prodigy 20 points
Part Number: INA280-Q1

Tool/software:

Hello,

i have a INA280-Q1 that is supply with 5V that i use to measure current through a shunt connected to Vcm = 9V.

In my application Vcm can be switched off. 

According to the datasheet this should not damage the device. But what behavior can I expect on the output of the amplifier.

I don't care about the exact output value of the amplfier but does it e.g. become unstable and oscillate?

Best regards,

Jesús

  • +1
    TI__Expert 5600 points

    Hi Jesus,

    The common mode voltage can range anywhere between -20 to 122V, without breaking the device. At Vcm = 0V, the device won't be damaged, however the output will be an arbitrary value. There will not be any oscillation, but please ensure that the device is properly grounded.

    Best,
    Mallika Senthil