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TLV320AIC3204 Unused Inputs

Michael Rourke
Intellectual 350 points

We are only using IN1-L in single mode. I have tied the other unused inputs (IN1-R, IN2-L/R, IN3-L/R) together and pulled them to our Vref  (1.65V) so they will not float.

Is this OK?

  • 0
    TI__Guru**** 189401 points

    Hi, Michael,

    Welcome to e2e, and thanks for your interest in our products!

    I believe this is OK. I have asked my colleague to confirm for sure.

    -d2

  • 0
    TI__Mastermind 46195 points

    Hi,

    Actually, I would recommend tying all the unused inputs to a 0.1uF cap to ground. No need to bias them.

    The problem with using an external Vref is power sequencing. You might damage the part or pull down the Vref for the rest of the system if AIC supplies are not present and Vref is present.

    Regards,

    J-