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About ADF5355 pin5 AVDD on AD-FCOMMS5

Question asked by on May 7, 2015
Latest reply on Jul 13, 2015 by tlili

Dear Sir,


We just found the U302, ADF5355, pin5 AVDD is floating on schematic of AD-FCOMMS5. But, it's connected to AVDD1 (3.3V) on EV-ADF5355SD1Z_RevA. Would you kind to help to clarify it ? And why need to reserve R21,0 ohm, on AVDD1 ?

Thanks a lot.