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AD8194

Hi everyone,

I've a PCB with an AD8194 and AD9880. The AD8194 mux is connected to a DVI and HDMI connector.

I've a trouble with the AD8194. The AD9880 doesn't detect signal with some DVI sources like personal computers.

If I remove the AD8194 and I do a bypass with some wires, the AD9880 detects the video source. Please, could anybody help me?

Thank you

Best regards

Jose

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  • Hi Jose,

    Is there any difference if you change resolution or cable (short vs. long or thin vs. thick gauge)?

    You mentioned that AD9880 is not detecting a signal in the failing cases.  Can you probe the TMDS CLK signal before and after the AD8194 in both the failing and working cases? 

    Dave

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  • Hi Jose,

    Is there any difference if you change resolution or cable (short vs. long or thin vs. thick gauge)?

    You mentioned that AD9880 is not detecting a signal in the failing cases.  Can you probe the TMDS CLK signal before and after the AD8194 in both the failing and working cases? 

    Dave

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