AD9216 MUX_SELECT and Differential CLK_IN

Hi,

My application require a differential clk input on AD9216, that is CLKA and CLKB is 180 degrees to each other, is this allowed? The datasheet says the skew between two clks should be within +- 1ns, what does this mean?

If CLKA and CLKB is180 degrees to each other, could I connet MUX_SELECT to CLKA to get a DDR output data on Data bus A? Is there any timing issue on this configuration?

Thanks a lot!

Frank

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