Could 3.3v pin of the STM32F4-discovery board be an analog power source? If not could I use a regulator for converting it as an analog power source?
I'm making a camera module using an image sensor. Its datasheet says that you need analog 3.3v, digital 1.8v and digital 1.2v source for power supply. What I wanted to do is to connect this camera module to STM32F4-discovery. Since the boards has 3.3v output pins and GND pins, if I use regulators for converting 3.3v to 1.2v and 3.3v to 1.8v, it seems I can provide 3 different voltages to the sensor. However, after searching for a while I realised that analog/digital powers are not same. But I couldn't understand so far exactly what is the difference and whether the 3.3v output pin on the discovery board could be an analog power source.