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TAS6424E-Q1: phase shift between different channel

liujian zhang
Prodigy 250 points
Part Number: TAS6424E-Q1
Other Parts Discussed in Thread: TAS6424E

Hello,

when we measured the 1kHz sinewave output, found one channel has phase shift compare to other channels, how would this happen? and if have any register can setting this inside TAS6424E?

thanks!

  • 0
    TI__Mastermind 45085 points

    Hello,

    We will investigate.  The LC filter on the output could have impact.  You may want to make sure your filter values are correct.

    Regards,
    Gregg Scott

  • 0 in reply to Gregg Scott
    Prodigy 250 points

    Hello,

    for the LC value, what we used is L=3.3uH, C=1uF, and now we found another phenomenon, as below show:

    the phase shift absolute time between two channels seems the same whatever output frequency change or not, what's the reason here? thanks!

    200Hz                                                                                     1KHz

    5KHz                                                                                        10KHz

  • 0 in reply to liujian zhang
    TI__Guru 50870 points

    Hi Liujian

      Could this phenomenon reproduced on the EVM? Please let us know what is your input signal format, and your register settings about it. We could have a try at our side. If not able to reproduce, this delay possible coming from input directly, seems happens to be one Fs cycle.