Has anyone tried using an external AREF on the DUE? I have questions.

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1

Apparently, the 3v3 supply has ripples in it which leads me to want to use an external AREF on the DUE.

Is the DUE schematic correct? It shows the 3v3 supply connected with the AREF pin to the CPU. Components on the schematic are unidentified such as JR1 and BR1, and NM which does not associate to any component.

I am assuming, based on a post elsewhere, that BR1 needs to be removed to allow AREF to be active. Is this correct?

And is Aref limited to 3.3v on DUE?

Any comments from users who have successfully used an external AREF would be appreciated.

2

Yes man Its limited to 3.3 voltage . The chips running on 3.3v how can u increase the reference voltage. Here a simple guide for help

3

and NM

NM == Not Mounted, as to exactly which components it refers to that's not clear, I would suggest both JR1 and BR1, but that's just a guess. Certainly the addition of JR1 would kill the AREF input.

Rob

4

Hi yes you will have to remove thr resisotr mounted to the AREF 3.3 volt and shift it to the next pad which is called "EXTERNAL" I made it and connected 2.5 volt to my AREF it works

but I still have a problem. Aftjavascript:void(0);er doing what I mentioned. I have to use

analogReference(EXTERNAL);

but I recive an error cause of that line... Can anyone tell me if it actually works with DUE ?