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INA195: If we have to use INA195AIDBVR, what changes should we have to do on board?

Qi Liu
Intellectual 2560 points
Part Number: INA195
Other Parts Discussed in Thread: INA281

Hi, support team

My customer has the questions as follow:


Currently we are using INA193AIDBVR on our boards.
If we have to use INA195AIDBVR, what changes should we have to do on board?

Thanks so much.

Best regards,
Yuki

  • +1
    TI__Genius 16080 points

    Yuki,

    Thanks for posting in the forum. 

    The direct answer to your question is that to keep the same system transfer function: V=I*R*G, with G increasing from 20 to 100, you would need to decrease your R value by the same factor. 

    A alternative, and my recommendation, would be to consider changing to the P4P drop-in INA281 in the A1 configuration.  It is higher performing across all specs except negative common mode voltage range and IQ.

    Unfortunately I see where we are also out of the INA281A1IDBVR and INA281A1IDBVT at this time, but we have many of the automotive INA281A1QDBVRQ1 available immediately in the store.

    Thanks, Dan Harmon
    Automotive Current Sensing PME