Our customer will consider the CLK input configuration at AC-Coupled LVDS, from AD9528 to AD9690.
Which layout is correct ?
a. LVDS CLK+/- >>> 100 ohm termination >>> ac-coupling cap >>> CLK IN
b. LVDS CLK+/- >>> ac-coupling cap >>> 100ohm termination >>> CLK IN
I think "a" is correct, because of the current pass.
If we configure the EVB clk circuit for ac-coupling LVDS, termination use the R810/811 @ 100 ohm, and remove the B805 ?
In the datasheet @ AD9690,
In the EVB schematic @ AD9690,
and in the datasheet @ AD9528,