AD9148 in single chip mode, SYNC needed?

Hi all,

I intend to use an AD9148 in single chip mode, i.e. no multi chip synchronization will be necessary.

Setup will be direct clocking (fdac=900MHz or 1GHz), dual port mode. Both FRAME inputs are connected to allow SED operation. only DCIA will be connected. Towards the FPGA (FMC connector) an fdac/4 clock is provided

I have two questions:

  • Is it still necessary with this configuraiton to connect the SYNC input (as with the demo board)? If yes, are there similar timing/phase requirements as with multichip synchronization? If no, does the SYNC input have to be terminated (same as the FRAME inputs)?
  • For SED operation is it sufficient to have DCIA connected or ist DCIB needed as well?

Thanks a lot in advance for You help.