ADV7610 LLC out jitter

Hi Katsuya San,

        Apologies for the delayed response.

        Please note that, Jitter specification is not mentioned in the ADV7610 design support file manuals but ADV7610 is designed to meet HDMI specifications.  Normally the ADV7610 is placed close to the PCB incoming connector resulting in minimal attenuation or distortion caused by the board. 

         The HDMI TDR spec. includes the signal distortion caused by the HDMI connector.  In general long cable runs will attenuate the signal more then anything happening on the board.  

Kindly refer to the FAQ below for the layout. Here, the expert provides general guidelines for laying out HDMI traces on circuit boards.

     HDMI Layout Guideline 

Also, Here you'll see we're using RClamp0524 diode to protect the HDMI lines.  These ESD diodes don't affect the HDMI signals. There are many ESD protection devices available now.  

Kindly note that, LLC jitter may related due to layout and power supply stability and layout could be marginal.

 Also refer this pdf http://www.t-es-t.hu/download/analog/an1166.pdf

Thanks,

Poornima S

Thank you for reply.

Accoring to the statement that "ADV7610 is designed to meet HDMI specifications." TMDS clock jitter is 0.3Tbit that is about 200ps, so idelal LLC jitter is about 200ps at min, am I right?

I would like to know if there are any electrical factors within the ADV7610 that inevitably worsen jitter when creating an LLC from the TMDS clock.
If there are none, it seems that the jitter from the TMDS input clock would be transmitted almost unchanged to the output. Is this correct?

I understand that this argument includes the ideal power supply and PCB tracing.

Hi Katsuya San,

      Please find the below comment,

         I would like to know if there are any electrical factors within the ADV7610 that inevitably worsen jitter when creating an LLC from the TMDS clock.

             This we need to check it from our ADV7610 compliance report or if possible could you please evaluate the same in our ADV7610 evaluation board so that we can get a clear picture about jitter.

Thanks,

Poornima

Thank you for reply.

As I do not have the ADV7610 evaluation board, I would be grateful if you could check and show the ADV7610 compliance report.

I think that would likely yield the data I need more quickly.
This is not an urgent matter, so it is acceptable if check and presentation of report take some time.

Thank you and Best Regards,

Hi Katsuya San,

        I will check and get back to you regarding the compliance report.

Thanks,

Poornima