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ADV8005 and ADN4654 for Galvanic Isolation


We need to implement galvanic isolation in video equipment with VGA, CVBS and DVI input interfaces.

The following diagram shows one of our approaches.


Although the input image may be at 1920x1080p60 (Full HD), it will be converted to 1280x720p60 (HD) in the NVIDIA TX2 processor before being recorded.

So we plan to use ADV8005 do downscale it by HW, enabling the use of ADV4654 to isolate the TMDS interface. Otherwise, it would not handle the 1.49 Gbit/s data rate at Full HD.

In this application, ADV8005 would not need external DDR2 memory. It would only be configured to perform either downscaling when we receive Full HD images or bypass when we receive HD.

Can you please validate this approach?

Can you also provide a reference script for the configuration we need?

Any other ideas/suggestions are much appreciated.

Thank you.

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