Really thank you for your help.
I am struggling with the application of AD8333.
I am confused that when I input 4*LO sine wave to Din of DS90C401, its output (Dout-, Dout+) was not a sine wave. Even though I adjust the amplitude of the input. It still could not work.
I don't how to solve this issue.
The purple trace with a sine wave is the input to Din of DS90C401，but the other two traces were Dout(+, -). I don't know why they were not sinewave.
Thanks for your kind help