[magicalhippo]

To the extra clear, there can be either one or three ADCs in the STM32F4, depending on model. The STM32F405/F415 models for example have three.

STM32 models with more than one ADC, they can typically be interleaved to increase effective sampling speed. In the case of the STM32F405/F415, the three 2.4 MSPS ADCs can be interleaved for up to 7.2 MSPS.

The STM32 ADCs are also quite accurate with proper board layout in my experience, so you actually get close to the 12 bits. Some newer STM32 models also support hardware oversampling to effectively get close to 16 bits.

[1]: https://www.st.com/en/microcontrollers-microprocessors/stm32...