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INA181: Why the Vcm is from -0.2V

Adrian.Lin
Intellectual 2790 points
Part Number: INA181

Hi experts:

I see the INA181's datasheet mentioned Vcm range is from -0.2V to 26V

Why the Vcm is from  -0.2V not 0V?

  • 0
    TI__Genius 15600 points

    Hi Adrian, 

    I am acknowledging this post and will provide you an update tomorrow. 

    Thank you for your patience, 

    Joe

  • +1 in reply to Joe Vanacore
    TI__Genius 15600 points

    Hi Adrian,

    Thank you for your post. 

    The reason that the INA181 can tolerate negative inputs is we have ESD protection diodes on the input pins that allow the device to tolerate negative transients. This way, it makes the INA181 more robust when used in a system.

    I want to also point you to the ABS max table where it is noted that the abs max negative input is GND - 0.3V.

    We recommend at most to have the inputs 200mV below the ground for the device and we warranty this performance. 

    The abs max table tells you that the device will be damaged if the inputs go below GND - 0.3V. 

    Best Regards, 

    Joe

  • 0 in reply to Joe Vanacore
    TI__Intellectual 2790 points

    Hi Joe:

    Thanks your clear comment, it's extremely useful for me

    I will take care about this electrical parameter

    thanks!