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INA210-Q1: about input bias current

Paul Kim
Intellectual 1430 points
Part Number: INA210-Q1

Hi team

INA210-Q1 D/S say Input bias current = Max 35uA .

[1] so total input bias current would be Max 70uA(= 35uA x 2) for two input pins ?

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

[3] figure 11 and figure 12 are showing Ib for only each pin, so that I have to double the graphed Ib for two input pins ?

  • 0
    TI__Mastermind 26335 points

    Hello Paul,

    I am linking a previous thread started by you, where I provide details on input bias current profiles and how these can be derived and used from the data sheet here.

    [1] Yes, your total combined input bias current from both pins would be 70uA for a common mode of 12V , supply of 5V, and a Vref of 2.5V.

    [2] Figure 12 in the datasheet has this.  You can also approximate it with the method outlined in the link above.

    [3] Yes, for the sum of the two currents into the part you will need to double the graphed value.