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ADV7125 Tri level Sync on Green Full HD Resolution

Category: Datasheet/Specs
Product Number: ADV7125

Hi,

Please give feedback on below queries regarding ADV7125

1. Is the composite sync on green tri level or bi level? For HD tri level is recommended

2. We are already using ADV7393 in multiple units. We need full HD resolution output with 60Hz frame rate in Graphics RGBHV standard.  But ADV7393 chip supports max 30Fps in full HD resolution and therefore we are forced to select ADV7125. Is there any possible upgradation on ADV7393 to support input clock upto 148.5MHz?

Regards

Hafiz Haja

  • Hi,

    I believe for composite sync, specifically in systems using the green signal for sync extraction it is generally a bi-level sync, not tri-level. 

    The tri level sync is generally only using for high-definition signals.

    No, the ADV7393 cannot support 1080P at 60Hz. They cannot handle the 148MHz input clock frequency.

    Thanks,
    Varshini K.

  • Hi,

    Thanks for the feedback.

    So ADV7125 also will not support 1080P at 60Hz. Seen in multiple query feedbacks in forum that ADV7125 support 148.5MHz clock input and therefore 1080P at 60Hz is possible.

    Also this 1080P is hd resolution and therefore tri level sync is required. In ADV7393 tri level sync is mentioned in HD signal waveform. So if ADV7125 supports 1080p at 60Hz, then we expected the chip to support tri level sync also.

    Correct me if I have assumed anything wrong.

    Regards

    Hafiz Haja

  • Hi,

     ADV7125BCPZ170 will support video formats up to 170 MHz pixel rates.  This includes 1080p60 (148.5MHz)

     Kindly note that, In datasheet they didn't mentioned about Tri level sync.  But it can support composite sync. This type of sync combines both horizontal and vertical synchronization signals into a single line-level signal. It's commonly used in standard-definition video systems.
    But ADV7125 want to use Tri level sync then it will need to come from an external source or Sync generator, as the chip doesn't produce it internally.
    Thanks,
    Poornima