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Topic: Default analog reference for DUE (Read 1 time) previous topic - next topic

goncalor

Hey there.

I'm assembling a circuit here and I wondered "what is the default analog reference for DUE?" I looked it up but I couldn't find it. Since due runs at 3.3V I assume its default reference is 3.3V. But it may be 5V as well and I don't want to mess up...

Thank you in advance.

Gericom


Hey there.

I'm assembling a circuit here and I wondered "what is the default analog reference for DUE?" I looked it up but I couldn't find it. Since due runs at 3.3V I assume its default reference is 3.3V. But it may be 5V as well and I don't want to mess up...

Thank you in advance.


It's 3,3v. But it can only read in a range from 1/6 to 5/6 of the reference voltage.
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goncalor

Ok, thanks. About that "1/6 to 5/6 range" of the reference voltage: any reason why it only reads in that range?

Graynomad

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But it can only read in a range from 1/6 to 5/6 of the reference voltage.

Do you have a reference for that Gericom, crippling an ADC like that would be quite extraordinary and the data sheet states

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The conversions extend from 0V to ADVREF


______
Rob

Rob Gray aka the GRAYnomad www.robgray.com

goncalor

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crippling an ADC like that would be quite extraordinary


I, too, think that. It would be weird. Reading only from 1/6 to 5/6 would mean putting 1/3 of the values in the trash can...

Gericom


Quote
But it can only read in a range from 1/6 to 5/6 of the reference voltage.

Do you have a reference for that Gericom, crippling an ADC like that would be quite extraordinary and the data sheet states

Quote
The conversions extend from 0V to ADVREF


______
Rob



Oh, sorry. I remember. It was for the dac output. Then I think it can read fron 0-3.3v indeed.
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goncalor

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Oh, sorry. I remember. It was for the dac output. Then I think it can read fron 0-3.3v indeed.


Ah, better now haha. Thanks Gericom.

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