Time between switching of frequencies while operating in two different modes in DAC AD9164

Hi Pathradhari,

Thanks for your interest in AD9164.

I will move your thread to High-speed DAC forum. Experts there will cater your issue.

Thank you and regards,

Xavier

Sure, Thank you.

 2xNRZ mode can support 0.1 to 4 GHz. Are you considering switching the modes in the middle of your frequency sweep? 

What will be the switching time if change mode while switching between the frequencies and what will be the switching time while switching between the frequencies if I operate in same mode?

With 100 MHz SPI speed you can expect 26x10nS=260nS of switching time for both FTW update and normal to 2xNRZ mode switching  

I understood the reason for 10ns (since SPI 100MHz). May I know the reason for 26?

We need 24 cycles for SPI write and 2 additional  cycles are required for the switching.

24 cylces = 1bit read/write + 15bit addr + 8bit data，why two additional  cycles are required for the switching ?