I need help to change the sampling clock of FMCADC2 EBZ board.
The FMCADC2 has a Crystek CVCO33CX-2500(Fixed 2.5 GHz). I want to change this VCO to 2.0GSPS of the same size. So I found a Crystek CVCO33BE-1950-2400.
Is it possible to apply this chip without modifying PCB layout? Because it is different from pin map of schematics and data sheet. Need to check the gerber file?
And when I measured AVDD5 on the circuit (between C67 and R6), I checked 5.4421 V.(regulated by AD7104.)
So I did a voltage adjustment circuit like this.
R6: 10 K -> 1.05 K(ERJ-1GEF1051C, 0201)
R24: 10 K -> 4.02 K(ERJ-1GEF4021C, 0201)
-> VC is applied by 1.127 V via AVDD5, which is divided by R6 and R24
I need your help. Thank you.