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PCM1754-Q1: Exact time from power up to analog output

Masatoshi Oguri
Expert 4780 points
Part Number: PCM1754-Q1

Hello,

My customer wants to estimate the exact time from power up to the start of analog output.

In the datasheet description, it seems there is time for 1024 system clocks, 1/fs for register initialization, and a unit group delay. However, there seems another delay in the figure shown as the red arrow below. How long is this delay can be? 

Also please let me know how I can know the unit group delay.

Thank you.

Regards,

Oguri (TIJ automotive FAE)

  • 0
    TI__Guru 53283 points

    Hi Oguri-san,

    That exact timing was never characterized, but I would expect this device would initialize very quickly, <1ms.

    The group delay is estimated to be between 18/fS to 20/fS.  On my bench I measured approximately 20/fS.

    Thanks,

    Paul