DAC5686: using dac5686,in dual channel mode ,the data frequency can be 162.5M ?

Hi, 

the DAC5686 is a CMOS input bus based DAC, and typically data rate for CMOS bus is at maximum at 250MSPS due to slew rate of the CMOS input. Therefore, yes, the input data rate can be 162.5MSPS.

-Kang