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TAS5755M: Asking for the TAS5755 DRC GUI setting between TAS57X1 and PPC1.16 GUI

SHH
Mastermind 32326 points
Part Number: TAS5755M
Other Parts Discussed in Thread: TAS5731

Hi Team,
My customer uses TAS5755 and tune by TAS5731 GUI.
Customer has question why the same DRC setting on TAS570x1 and PPC1.16 has different result input/output chart.
Could you please let me know which one is correct?

BR,
SHH

  • 0
    TI__Mastermind 24835 points
    Hi Soctt,
    In PPC1.6, the DRC k is adapted and the start point is fixed - so the you can see that the gain curve is slant and not horizontal. While in GDE GUI, the k is fixed so the gain curve is horizontal before the threshold. They use the different adaption method. Please be noted that the PPC1.6 is very old GUI, so please don't use it. We recomend customers to use GDE in their evaluation/design.
    Best regards,
    Shawn Zheng
  • 0 in reply to Shawn Zheng
    TI__Mastermind 32326 points
    Hi Shawn,
    PPC1.16 do well on the 0x51 and 0x21 mux. the old GDE is not intuitive for tuning.
    GDE is older than PPC1.16 from the releasing timeline. or you mean other GDE for TAS5755?

    BR,
    SHH
  • 0 in reply to SHH
    TI__Mastermind 24835 points

    Hi Scott,

    As far as I know, the PPC1.6 5731 GUI only supports inputUSBBoard3, and this version of EVM is not available any more. The current EVM supports GDE GUI. I understand that the PPC1.6 GUI show the signal flow(MUX) very well. Please use the following picture for MUX setting when program with GDE.

    Best regards,

    Shawn Zheng

  • 0 in reply to Shawn Zheng
    TI__Mastermind 32326 points

    Hi Shawn,

    Got it.

    I found that PPC1.16 still works by jumping SDA/SCL to the TAS5755 board from PPC mother board.

    could you please clarify which graph is correct for the DRC graph? I marked the question that raised from customer side.

    BR,

    SHH

  • 0 in reply to SHH
    TI__Mastermind 24835 points
    Hi Scott,
    Both are not wrong, but we usually use the left one - the gain is flat before input amplitude reach the THR.
    Best regards,
    Shawn Zheng