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INA4181: Pin connection for unused channel

Shinya Sawamoto
Expert 5315 points

Part Number: INA4181

Hello,

I'd like to know how to design pin connection for unused channel in INA4181. (For example, 3/4 channel are used and 1/4 is unused.)
1) IN-x
2) IN+x
3) OUTx
4) REFx

Thanks in advance.
S.Sawamoto

  • 0
    TI__Mastermind 26025 points

    Shinya,

    For a channel not in use on this device, here is the recommended pin out:

    1)IN-x: GND

    2)IN+x: GND

    3)OUTx: NC

    4)REFx: GND

    By grounding the inputs and reference, you are defining these to be 0V rather than a floating number that could potentially cause noise inside the part if these are allowed to fluctuate. Please let me know if you have any questions.