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ADF4356 freq vs volts

Category: Hardware
Product Number: ADF4356
Software Version: -

Is there a Freq vs Volts chart for the VCO(s) like the ADF4351 for the ADF4356 ? I have not seen one.

The reason to know this is that we only have 4.2V available for the VCOV, VPD  etc 

We have about 20 in the field and it works fine on Vp= 4.2V.... VCO requirement is 6.3 GHz (fixed)  and currently Vtune is about 1.25V. I have never seen <1 or > 1.5....

I am concerned that it might get itself into the > 4V region if it tries....

Is there a demand for >=4.2V on VCOtune ? or is Vtune confined to lower levels ?
board op temp = ~ 60 deg C.  Using automatic cal. 

We have the ADF4356 EVAL. Very good. PLLsim is also a great tool, its why we buy ADI....

regards, glen.