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LMK04906: About DC coupling and AC coupling of CLKin, OSCin

Sho Ogane
Genius 5575 points
Part Number: LMK04906


Hi all.

I would like to the different between "Single-Ended Termination"(Figure 24) and "DC Coupled LVCMOS/LVTTL Reference Clock" (Figure 25).
What is definition of single-end?
I think LMK04906's recommended termination is AC coupling when clock source is single-end, If we refer to Figure 25 with using single-end. In this case, is it any issue?

Sorry, I would like to get your comment as soon as possible.

Best regards,
Sho 

  • 0
    TI__Genius 16845 points
    Hi Sho,

    I have assigned a responsible engineer to the post, he will respond soon. In the meantime, I will try to help here.

    A single-ended clock source means that it is not a differential signal, such as LVDS / LVPECL / HCSL / CML.

    It is recommended to use AC-coupling if the single-ended clock source is a sine wave, such as in Figure 24.
    Otherwise, you can use AC-coupling or DC-coupling.
    I hope this information helps.

    Kind regards,
    Lane