Using Virtual Beta, the -625 speed grade shows 4-6 dB better 2x and 3x spurs over the -1300 speed grade. Why is this? Is it replicated in actual devices?
I am testing the -1300M version on an eval PWB & ADS7-V2 FPGA with clocks between 340 to 510M. Would I see a change if I replaced the AD9695-1300 with AD9695-625?