I want to know if "HAL_SDADC_Start(&hsdadc1); " and "HAL_DAC_Start(&hdac1, DAC_CHANNEL_2);" at the same time?

[NYun]

I want to use 12 bit DAC and 16 bit ADC at the same time. I mean that I want to force some level for two channel with 12 bit DAC and measure level with 16 bit ADC. But there are error when I use both. If I use 12 bit ADC with 12 bit dac. it is no problem. So I think 16 bit sigma delta adc is using 12 bit dac internally. I'm using STM32F373cbt. When I use 16bit adc alone, there is no problem.

Regards, nsyun!

[S.Ma]

Well, if both periperals are supposed to be independent in the reference manual and nothing particular in the errata sheet, something else causes the error. Sigma delta adc are based on 1 bit analog comparators and time switching. Successivr approximation adc sometime use dac internally.