Forum Rule: Always post complete source code & details to reproduce any issue!
Results 1 to 1 of 1

Thread: External analog mux

  1. #1

    External analog mux


    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. 

Name:	analogmux.jpg 
Views:	5 
Size:	86.1 KB 
ID:	17584
    Last edited by MattH; 09-13-2019 at 03:23 PM.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts