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Re: Queries about ADF4360-8 Unlocking...

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Hello Wayne,

Your PLL applicaiton when viewed using our ADI simPLL software looks fine...this would indicate that your loop filter components and register write values are fine...

 

I have 2 comments to take on the schematic.

 

1) Can you ensure that the L1 and L2 inductors are mounted at right angles and as close to the pin of the ADF4360-8 as feasible

 

2) Each supply pin ...AVDD, DVDD and VVCO should have seperate decoupling caps...see the eval board schematic for details...

 

http://www.analog.com/static/imported-files/user_guides/UG-105.pdf

 

I hope tihs helps.

 

Regards,

Brigidf.


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