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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 Dave,

    I've probed the CLK signal before and after of AD8194

    Before: CLK- has a signal with 2.25v of DC and 350mv of AC over the DC

    CLK+ has a DC of 1.6v (more less)

    After: CLK- has a DC signal of 3v

    CLK+ has a DC signal of 2.5v

    The AD8194 doesn't have clock in its output

    If I do a bypass of AD8194 the AD9880 works fine with that signal

    The AD8194 has internal equalization, could it be the problem?

    The AD8193 doesn't have equalization and is pin to pin compatible with AD8194, could it be a solution?

    Thank you

    Regards

    Jose

Reply
  • Hi Dave,

    I've probed the CLK signal before and after of AD8194

    Before: CLK- has a signal with 2.25v of DC and 350mv of AC over the DC

    CLK+ has a DC of 1.6v (more less)

    After: CLK- has a DC signal of 3v

    CLK+ has a DC signal of 2.5v

    The AD8194 doesn't have clock in its output

    If I do a bypass of AD8194 the AD9880 works fine with that signal

    The AD8194 has internal equalization, could it be the problem?

    The AD8193 doesn't have equalization and is pin to pin compatible with AD8194, could it be a solution?

    Thank you

    Regards

    Jose

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