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Problem with ADF4153 MuxOut

Question asked by ChrisH Employee on Jul 31, 2009
Latest reply on Sep 10, 2010 by dawid.powazynski

Trying to use the ADF4153 with 16MHz ref clock and part is working well when the MuxOut set to 3 state out. However, when I try to look at the MuxOut to monitor the R and N counters, I see the Ref Clock fly everywhere. But if I cut the trace on the MUXOUT line from the ~ 1.5" to  < 0.5", everything is fine.

 

The datasheet shows nothing about proper configuration or loading when MUXOUT is used in R Counter or N counter modes. Does it need to be buffered?

 

Suggestions?

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