Multiplexing

Discussion in 'General Electronics Chat' started by ryanlloydmiller, Dec 14, 2011.

  1. ryanlloydmiller

    Thread Starter New Member

    Oct 31, 2011
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    I want to de-multiplex an audio signal to one of 32 speakers. Digikey has this:
    http://search.digikey.com/us/en/products/ADG732BCPZ/ADG732BCPZ-ND/996792

    But this is a multiplexer. I don't understand the difference in terms of the actual chip between a mux and de-mux. If it just switches on the given channel, why can't I just use the 32:1 instead of a 1:32? Where does the directionality come in?
     
  2. Wendy

    Moderator

    Mar 24, 2008
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    This was neither feedback nor a suggestion, so I have moved it to a more appropriate forum.
     
  3. crutschow

    Expert

    Mar 14, 2008
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    It can be used as either a multiplexer or demultiplexer. The unit is bidirectional.

    But it's for controlling low level signals. It can't control signals that go directly to a speaker. For that you would need a speaker selector switch.
     
    ryanlloydmiller likes this.
  4. ryanlloydmiller

    Thread Starter New Member

    Oct 31, 2011
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    Why can't I use it? One of its listed applications is "audio switching" and it can take a +/- 2.5V supply which is plenty for my purposes.
     
  5. kubeek

    AAC Fanatic!

    Sep 20, 2005
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    Audio yes. Power audio aka 8ohm speakers not. Imax continous is only 30mA.
     
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