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AD9148 in single chip mode, SYNC needed?

Question asked by Robert.Ganter on May 16, 2014
Latest reply on May 19, 2014 by Robert.Ganter

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.