Hi, Paolo.
Correct me if misunderstood your question. My understanding to your query is that you want your DAC to receive instructions or data with a clock frequency "f" and you want to send data from the DAC to the controller with a clock frequency of "2f". If this is the case, as long as "f" and "2f" is within the clock frequency range I believe that you can do that.
Regards,
Mark