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INA283-Q1: Input bias current for this IC

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Part Number: INA283-Q1

I would like to confirm input bias current of INA283-Q1.

There is the specification of it "25uA typ.".

I have questions.

1. Which is "source current" or "sink current"?

2. In the datasheet there is it of +IB (Figure 7). For -IB, is its characteristics like Figure 7?

Best regards,

Atsushi Yamauchi

  • Hello Atsushi-san,

    The 25uA typical input bias current is a sink current into the INA283-Q1 device.

    The characteristics for +IN IB shown in Figure 7 should be fairly similar to –IN IB when there is no differential across +IN and –IN. However, this changes as the differential voltage is increased. For more information on how the input bias current is affected by the differential voltage, please refer to session 8 of the “Getting Started with Current Sensing Video Training Series” titled “Understanding Filter Related Errors” which can be found at this link: training.ti.com/getting-started-current-sense-amplifiers-session-8-understanding-filter-related-errors.

    Best Regards,

    Mitch M, TI Sensing Products Applications Support

    Getting Started with Current Sensing Video Training Series

    Hall Effect Sensor Video Training Series

    TI makes no warranties and assumes no liability for applications assistance or customer product design. You are fully responsible for all design decisions and engineering with regard to your products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning your designs. All information in this correspondence and in any related correspondence is provided "as is"  and is subject to TI's Important notice and disclaimer.

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