LVDS Jitter Cleaner Recommendation

Benedict Fawver

Other Parts Discussed in Thread: LMK04906, LMK04228, LMK04828, LMK04832

I am looking for a recommendation for a chip to clean up jitter on an LVDS serial MCLK signal from an FPGA. The MCLK frequency is typically between 40 and 80 MHz. The output needs to be DC-coupled LVDS with RMS jitter less than 1ps. I also really only need a single output per input (up to 2 potential clocks in, 2 potential clocks out).

I have seen recommendations for LMK04906 but it is potentially more complicated than we need.

-Ben

over 1 year ago

0 Asim Khan over 1 year ago

TI__Genius 9250 points

Hi Ben,

You can look into LMK5B12204 device which had lower output count for your requirements. For jitter cleaner, we usually have higher output count devices.

Best,

Asim

0 Benedict Fawver over 1 year ago in reply to Asim Khan

Prodigy 10 points

Thank you for this recommendation. Pardon my ignorance, but this chip has AC-coupled LVDS outputs and we typically require DC-coupled LVDS, what is required to use this with DC-coupled LVDS?

0 Asim Khan over 1 year ago in reply to Benedict Fawver

TI__Genius 9250 points

Hi Ben,

You are right on that. I missed that detail while recommending that part. I am forwarding this request to subject matter expert who would better assist with all your inquiries and details.

Best,

Asim

0 Ajeet Pal over 1 year ago in reply to Asim Khan

TI__Genius 12560 points

Hi Ben,

There are multiple LVDS interface jitter cleaner parts and you can use the Clock Tree Architecture Tool to find the available solution.

You can have a look on the LMK04228, LMK04828 and LMK04832, those all are supporting 80MHz LVDS output with the jitter better than 100/200fs.

Thanks!

Regards,
Ajeet Pal

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

Clock & timing

Clock & timing forum

LVDS Jitter Cleaner Recommendation