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Thread: External analog mux

  1. #1

    External analog mux

    Hello,

    Dumb question: Can I connect directly each drain pin of a quad SPDP switch such as the ADG774 to the analog pins of my Teensy3.2 ? I mean do I need any capacitor or pull up/down resistor ?

    My goal is to increase the number of analog inputs. Each of the 8 source pins of the switch is to be connected to a variable resistor (in a voltage divider setup).

    Second question how long do I need to wait before I can do the analog read once I switched the ADG774 one way or the other ? Can I turn the IN pin Low or High and in the next line of code do my analog reads or do I need a small delay for stabilisation ?

    Thanks !

    Click image for larger version. 

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    Last edited by MattH; 09-13-2019 at 03:23 PM.

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