STM32F3 16-bit SD ADC resolution in Single Ended mode.

[milanmeh]

Posted on July 25, 2015 at 13:19

I would like to know what is the maximal resolution of 16-bit Sigma Delta ADC on STM32F3 line of microcontrollers when used in single ended mode? Can it achieve full 16-bit resolution, 0-65535, in SE mode?

[Amel NASRI]

Posted on July 30, 2015 at 17:16

Hi laketic.milan.001,

The SDADC in STM32F37x devices supports 2 single-ended modes:

1. Single-ended offset mode: is like differential mode with minus pin grounded, so in this mode we lost half of the range and the resolution is 15 bits.
2. Single-ended zero reference mode: the full positive/negative dynamic range is maintained so the resolution is 16 bits.

You may get more details on these 2 modes in

http://www.st.com/st-web-ui/static/active/en/resource/technical/document/reference_manual/DM00041563.pdf

.

-Mayla-