No, several MCUs, like a lot of STM32s, support hardware oversampling with optional division. Here's[1] a document describing it for the L0 and L4 series, which

No, several MCUs, like a lot of STM32s, support hardware oversampling with optional division. Here's[1] a document describing it for the L0 and L4 series, which like most of the STM32 series have SAR[2] ADCs. [1]: https://www.st.com/resource/en/application_note/an4629-adc-hardware-oversampling-for-microcontrollers-of-the-stm32-l0-and-l4-series-stmicroelectronics.pdf https://www.st.com/resource/en/application_note/an4629-adc-h... [2]: https://en.wikipedia.org/wiki/Successive-approximation_ADC https://en.wikipedia.org/wiki/Successive-approximation_ADC