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LMP8640-Q1: about input bias current

Paul Kim
Intellectual 1430 points
Part Number: LMP8640-Q1
Other Parts Discussed in Thread: INA190

Hi team

LMP8640-Q1 D/S say Input bias current = Max 28uA at Vs = 5V.

so total input bias current would be Max 56uA(= 28uA x 2) for two input pins ?

further, may I know total input bias current for  two input pins at Vs = 0V and common mode voltage = 20V ?

  • 0
    TI__Genius 17100 points
    Paul,

    The max input bias current for both pins will be 56uA. For a Vs = 0 condition, bias current will be less than when the device is powered on, but if you are looking for the lowest bias current devices TI has the INA190 is special for this as mentioned in the post linked below:

    e2e.ti.com/.../709509


    Thank you for using the E2E forums,
    Manuel Chavez