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INA240: Output Impedance

Michael T Schneider
Expert 3810 points

Part Number: INA240

Hello Team,

I am supporting a design that uses the INA240A1 device.  It is connected to an ADC that recommends using an amplifier with an output impedance of less than 50 ohms, but the datasheet for the devicedoesn’t list the output impedance. 

Can we provide a quantitative value for what it is? I see it says "Low" in the datasheet.

Thanks!

  • 0
    TI__Mastermind 36640 points

    Hi Michael,

    The low frequency output impedance is indeed very small, less than 1Ohm. It increases slightly in amplitude at higher frequencies. Details can be found in this output impedance plot.

     

    If you wish to learn more, please refer to this blog.

    Regards, Guang