ADG884 switch Bi-Directional..?

Hi

We are using the ADG884 switch in an audio application.

The end device has one mono audio input connector, and the ADG884 is being used to select whether it is in input or output mode - see image below.

Question --- are the audio channels in the ADG884 bi-directional ?  Should running D1->S1A be the same as S1A->D1

In our application we seem to see high noise on the "input mode" path D1->S1A but see low noise on "output mode" S1B->D1

Is it possible the switch is not designed to be driven from D1 and this is causing audio issues..?

Thanks

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  • 0
    •  Analog Employees 
    on Jan 21, 2015 4:15 PM

    Hi John,

    Have you tried putting the electric guitar signal through the S1B->D1 channel to the passive circuit as an experiment to see if the noise is still there in that direction?

    This could be a useful experiment to see if the noise issue you are seeing is being caused by the direction the mux is being used.

    Regards,

    Stephen

Reply
  • 0
    •  Analog Employees 
    on Jan 21, 2015 4:15 PM

    Hi John,

    Have you tried putting the electric guitar signal through the S1B->D1 channel to the passive circuit as an experiment to see if the noise is still there in that direction?

    This could be a useful experiment to see if the noise issue you are seeing is being caused by the direction the mux is being used.

    Regards,

    Stephen

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