AnsweredAssumed Answered

ADV7180 LLC jitter

Question asked by acm45 on Jul 11, 2018
Latest reply on Jul 12, 2018 by PoornimaSubramani

Hi all,

 

my system has a CVBS input, I'm working with ADV7180 to convert and read the video data with an FPGA.
I followed the application notes to design the input amplifier and the ADV7180 configuration. After sample the data I send it to a screen via DVI output and I randomly see green pixels. It doesn't happen if I generate the output video with an internal clock so I think it's related to the LLC ADV7180 output clock.

 

Specifically with the oscilloscope I see that the LLC has a quite large jitter also comparing with the external crystal.
In attachment the screenshot of my oscilloscope of LLC and crystal, is that normal?

 

Regards

Attachments

Outcomes