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INA210-Q1: Leakage current testing spec

Joe Howard
Intellectual 2970 points
Part Number: INA210-Q1

I have a question about quiescent current of our INA210-Q1: The datasheet shows input bias current (IN+ and IN-) as 28uA typ and 35uA max. What were the testing conditions for that spec?

Another question is: at standby, V+=0V, but IN+ and IN- are still hooked to a 12V PbA battery input (for input current sense purpose). In this case, how much is the leakage current on these 2 pins?

-Joe

  • 0
    TI__Expert 4915 points

    Hi Joe,

    The 28/35uA input bias current spec is given with VS = 5V and Vsense ( VIN+/-) = 12V @ 25C and per input.

    I checked these on the lab and can confirm the following readings:

    When VCC = 5V Ib (For IN- & IN+) = 55uA(12V), 58uA(13.8V), 60uA (14.4V).
    When VCC = 0V Ib (For IN- & IN+) = 22uA(12V), 26uA(13.8V), 27uA (14.4V).

    PS: These readings are the combined values, as they would appear on a system, since Rsense effectively "shorts" the IN- & IN+ Inputs.

    For individual input currents the values above should be divided by 2, as they are shown on the datasheet.