I've changed my design to the AD9249 ADC and want to synchronize two of them together. Wondering what's the best way to do that. Should the system FPGA issue the SYNC signal that's on same length traces going to both ADCs? Should an outside device, such as an AD9525, and have its SYNC outputs (as CMOS) drive the AD9249's SYNC inputs? Is that the best way?
If the FPGA generates the sync signals to both ADCs, what's the best time domain for that signal to be on? What are the best practices here?