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PCM1754: Delay time

Kuramochi Tadahiko
Guru 28715 points
Part Number: PCM1754

Hi,

I would like to know the delay time of PCM1754.

I found the following thread.

https://e2e.ti.com/support/audio/f/audio-forum/508704/pcm1754-delay-time-definition

Justin-san said that it is 18/fs.

However, the link he showed (e2e.ti.com/.../1845290 has expired.

Is this value(18/fs) still valid?

Best Regards,

Kuramochi

  • +1
    TI__Guru 52683 points

    Hi Kuramochi-san,

    Based on my bench measurement I found about 20/fS of a delay, but it is a difficult measurement to make.  The last version of the PDS that featured the specification showed 18/fS.  This number is likely based on simulation.  Ultimately, delay time is no longer specified in the PDS.  

    It should be noted that I would expect the delay to be the same between devices, if that is the customer's concern.

    Thanks,

    Paul