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Published 20 hours ago • verified publisher icon stm32-rs

ADC sample conversion and calibration interface loses resolution

Open gernoteger opened this issue 3 years ago • 0 comments

The ADC field calibrated_vdda and the functions sample_to_millivolts,make_sample_to_millivolts and reference_voltage + their configuration counterparts use millivolts as unit of measurement.

While the VREF+ of the STM32F4xx CPUs is in the range of 1.8-3.3V, the maximum ADC resolution is 12 bits with 4096 possible steps. Therefore in 12 bit mode we lose 1-2 bits in resolution through the conversion and calibration API.

gernoteger avatar Jan 07 '22 20:01 gernoteger