Arduino Forum

Products => Arduino Due => Topic started by: mantoui on Oct 23, 2012, 02:03 pm

Title: ADC internal voltage reference for DUE ?
Post by: mantoui on Oct 23, 2012, 02:03 pm
The UNO has 1.1v internal voltage reference for ADC, and the ARM-based Maple has a 1.2v interval voltage for ADC (ADC1, channel 17).  Reading the SAM3X8E reference manual, I don't think the DUE has an internal voltage reference for ADC. Is this true?

The DUE's ADC does have a gain that can be configured to trade precision for range.
Title: Re: ADC internal voltage reference for DUE ?
Post by: Grumpy_Mike on Oct 23, 2012, 06:22 pm
Yes that is right it only has a pin Vref input.

Have you read the application note on the A/D, document number 11106A
www.atmel.com/Images/doc11106.pdf  (http://www.atmel.com/Images/doc11106.pdf)
That tells you all about it.