I'm using my custom PCB with ADF4355 and it doesn't lock.
Programming seems ok, checked with power down on/off.
Fpdf=20MHz, Fref=10MHz, Fout=5GHz
I attached files for AdiSimPLL.
Here PLL config:
I checked R and N dividers via MUX output, for R is 20MHz, for N is about 13,2MHz.
Fout is 3,31GHz instead of 5GHz and Vtune=4,7V
I changed PDF polarity and got Fout=3,25GHz and Vtune=0,5V
What could be wrong?