AD9213 TDC in averaged SYSREF mode

AD9213 MCS lock has been achieved by reading Register 0x151E Bit1 = 1,then the contents of Register 0x1623 through Register 0x1626 will never change.


1. At this time, the applied SYSREF_x is still there. So I think it will always change.

2. Since it is a constant value, which external signal is the time difference between the averaged internal "local" SYSREF ?



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[edited by: Jamey at 12:54 AM (GMT -4) on 2 Jul 2021]
  • 0
    •  Analog Employees 
    on Jul 10, 2021 12:39 AM

    Hi Jamey,

    I'm sorry for the slow reply.

    For question #1, are you asking if the contents of Register 0x1623 through Register 0x1626 will change? If voltage and/or temperature conditions change, the contents of these registers could change a little. The MCS only locks once even though SYSREF_x is still present, but those register contents will still show the time difference between SYSREF_x and internal "local" SYSREF.

    Thanks,

    Doug