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Original question:

INA181: INA181A1 current sense amplifier output formula

INA181: What is the max differential voltage that can be placed across the input pins?

Eddie Aho
Prodigy 50 points
Part Number: INA181

I have a question as to what is the max differential voltage that can be placed across the input pins?  From the data sheet it seems that it would be essentially equal to the voltage at Vs.  In my case I am using this as a uni-directional current sense so pin 5 and 2 are at ground.  Vs is at 5V.

  • 0
    TI__Mastermind 18780 points

    Eddie,

    As shown in the abs max table, the device can actually withstand up to a +/-26V differential on the inputs, provided that the individual inputs in question do not violate any other conditions, such as the common mode voltage of the device:

    Of course in this condition, the device would be well saturated into the rail, and in a non-linear state until a voltage is produced that places it back into the linear region. 

  • 0
    Prodigy 50 points

    Thank you for your FAST response!!  I did see that in the data sheet, but wanted to be sure.  It is impressive that it can handle that differential voltage.  It must be due to the resistance or resistors built into the device.