Max Tension in Analog Input and DAC output

Hello guys,

For my project i need to measure an Tension on an Analog Input and reproduce the same signal in an DAC output on the Arduino Due.

So my question is, what is the most voltage possible to inject in an analog pin ? THe Max Voltage is at 5V or at 3.3V like the I/O Pins ?

Thanks for your answer, and sorry for my English.

from - http://www.arduino.cc/en/Main/ArduinoBoardDue

Warning: Unlike other Arduino boards, the Arduino Due board runs at 3.3V. The maximum voltage that the I/O pins can tolerate is 3.3V. Providing higher voltages, like 5V to an I/O pin could damage the board.

A0-A11 are I/O pins. 3.3V max.

The DAC out is even more limited - it can't get to 0V or 3.3v

The DAC outputs go from 1/6th of Vcc to 5/6th of Vcc and are extremely fragile (well that might just be DAC0 which is also a wake-up interrupt pin leading down into the 1.8V core). Thus you cannot echo an ADC read voltage directly on a DAC pin, you'd have to amplify it with a rail-rail opamp (a good idea anyway to make the output more robust).

The chip is using a 1.8V CMOS process, only the I/O drivers are 3.3V, and they are close to the limit, so take care, you have been warned.

Thanks Guys for your answers.