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SRC4193: Volume Control bits?

Leo A.
Intellectual 545 points
Part Number: SRC4193

Hello,

When doing volume control with the SRC4193 how many bits does it use internally for volume control 32, 64? This is not mentioned in the datasheet.

Thanks;

Leo

  • 0
    TI__Expert 5645 points

    Hi Leonid,

    Just to clarify, you are referring to the independent digital attenuation for the left and right audio channels. Is that correct?

    The attenuation ranges from 0 dB (or unity) to –127.5 dB in 0.5-dB steps. But you are interested in the internal implementation details...Correct?

    Thanks.


    Best regards,
    Ravi

  • 0 in reply to Ravi Patil
    Intellectual 545 points
    Yes Iam referring to the attenuation from 0 to -127.5db, and I want to know how many bits are used internally to accomplish this function because the more bits the more accurate the result. For high end audio typically 64-bits are used.
  • 0 in reply to Leo A.
    TI__Expert 5645 points

    Hi Leonid,

    Based on the feedback from design team, the volume control uses 28 bits including the sign bit. Since it is always positive, the effective bits are 27.

    Best regards,

    Ravi