Frequency of DCIP/DCIN is 300MHz and we want to use x4 interpolation. use internal PLL and not use DACCLKP/DACCLKN pins, how to unused pins(DACCLKP/DACCLKN )? must REFCLKP/REFCLKN pins be connected to external differential termination resistor(100 ohm)?
Assuming that you are asking AD9122, right?
1. left floating.
2. Yes. Refer AD9122 EVB schematic.