We are seeing a problem with the ADF4106 analog lock detect. It is still showiing the part is in lock (not all the time but ocassionally) even when the Ref frequency is removed. Is there a way around this?
It's a weakness of sorts for the ADF4106 that the reference needs to be connected for digital lock detect to work. Analog lock detect should go low in these cases however.
Take a look at the attached.
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