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AD9956: VCO couldn't reach its maximum frequency

Question asked by onder on Mar 8, 2017
Latest reply on Mar 9, 2017 by Kevin.G

I have AD9956 evaluation board and its VCO is capable to sweep frequency from 2.3 GHz to 2.5 GHz. However, I build a PLL circuit and VCO can reach 2.4725 GHz. Is there a way to increase the maximum frequency of VCO up to 2.49 GHz or 2.5 GHz ?  (either changing internal resistance or increasing charge pump supply voltage)

Ref clock: 25 MHz