AD7616 channel synchronization???


i'm trying to use ad7616 for new design which is having more than 80 channels on 2FMC's and i need to design for synchronized data... can anyone tell me how to use this IC for synchronization purpose without any clk or sync pin's.

and how to conform that data is processing at what speed without ref clk in parallel communication.

how much timing relaxations can be taken in ad7616-p than ad7616

its little bit urgent ...any one can u plz help me to get knowledge about this to finish this design...

thank you in advance