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Questions about the ADF4356 signal output

Question asked by wzgllwk on Apr 25, 2018

Hello,
When I use the ADF4356 , I measure the voltages of the CREG1 and CREG2 pins as 0V and 1.89V, respectively, but the datasheet is marked with 1.8V. If the voltage requirement is not reached, does it affect the signal output? In addition, the frequency of the reference signal I use is 50MHz, and the frequency of the phase detection is 25MHz. When the oscilloscope detects the Muxout pin, the frequency of the PFD appears, but it is unstable, sometimes it does not exist, and it cannot be locked. So I would like to consult, thank you ~

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