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STM32F373 DAC documentation mistake/inaccuracy in DACout formula

Question asked by Kitaev.Andrew on Jan 24, 2017
Latest reply on Jan 30, 2017 by Oku.Kenichi.002

While researching a project I measured the output of STM32F373V8 DAC and had a hard time considering whether it is Ok.

Reading the latest Reference Manual (June 2016 DocID022448 Rev 5) for the MCU found a formula for DAC output, which states DACoutput = VDDA x (DOR/4096) (page 265 section 14.5.3 DAC output voltage), which is wrong TWICE in my opinion.

This confused me and took some time to research, results:

1) Of course in AN3126 (Audio and waveform generation using the DAC in STM32 microcontrollers) there is a real formula, which states DACout = Vref x (DOR/DAC_max_digital_value) but I see no point in needing AN to exploit the peripherial;

2) There is a case (with LQFP48) when VDDA and Vref are the same;

3) The real formula should state DACoutput = Vref x (DOR/4095) in my opinion.

I'd like the tech support to correct this issue till the next document revision. Hope you will read. And tell me, if this is not the place to report such mistakes.

Thanks, community.

Wish you luck!

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