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LMK00105: Differential clock input termination

Part Number: LMK00105
Other Parts Discussed in Thread: CDCM6208,


I have a question as title.
As I read past thread;

There is description about application report (,

but I'm still not clear about differential input termination.

I consider about which circuit attached image below is better AC coupled LVDS with CDCM6208 for 2 types.

Type (1) is 2 AC coupling capacitors and 50 ohm termination for both positive and negative line.

Type (2) is 1 AC coupling capacitor for both positive and negative line and 100 ohm termination across the line.

Mother board is already mounted, and I want to use type (2) to decrease the parts.

I think type(2) will work, but I wonder there is any problem;

As CLKin and CLKin* is pre-biased about 1.4V, something wrong occur because of some difference of pre-biased voltage between CLKin & CLKin*.

If there are no problem, I want use type(2).

Best Regards,