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AD9517 fails to lock

Question asked by Kujawsjo on Apr 1, 2016
Latest reply on Apr 5, 2016 by Kujawsjo

I have an AD9467-FMC-250EBZ card that contains the AD9517 clock reference.  I am trying to get the AD9517 to lock to an external 10MHz clock and modified the board as follows:

 

1) Removed C209 and C210 and placed them on C304 and C305.

2) Installed shorts on C302, C303, C300, and C301.

3) Set the registers for A divider = 25, default settings for the rest of the 0x10 - 0x1D or per AD9517-4.pdf table 24 (bottom of page 30).

4) The chip seems to respond with a random output.

 

Is there a tool that can be used to help me set the PLL parameters properly?

 

Thanks,

 

-Joe Kujawski

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