Arduino DUE DAC limits

Other Hardware Science and Measurement
1

Hello folk, does the Arduino DUE DAC can't generate low signals than 0.4V and high than 2.7V ??
this is my code :

void setup() {
  analogWriteResolution(10);
}

void loop() {
  for (int brightness = 0; brightness < 1023; brightness++) {
    analogWrite(DAC0, brightness);
    delay(2);
  }
  for (int brightness = 1023; brightness >= 0; brightness--) {
    analogWrite(DAC0, brightness);
    delay(2);
  }
}

and please take a look to the attached picture to see the generated wave limits.
Thank you

DS0003.png

2

The range is 1/6 to 5/6 Vcc. Use external hardware (OPA) if you need to scale up down

3

Not only does it have that limitation, its very noisy too. Use an external DAC is my
advice, there are many good ones to choose from.

4

My solution was to use both DACs, and to use the difference voltage. That gives -2.3 to + 2.3 V.

5

How was the noise? I found it shockingly bad on the Due board.