Hi All,
I have constant measurement offset in Vbat internal channel from ADC3, ~30mV above the supplied value.
Vref calculated by macro:
__HAL_ADC_CALC_VREFANALOG_VOLTAGE((uint32_t)(measure->adcDataAverage[measureVref]) , ADC_RESOLUTION_16B);
i see offset of 4 mV above the configured 2.5V (reading is 2.504 - 2.505)
Vbat also calculated by macro:
__HAL_ADC_CALC_DATA_TO_VOLTAGE((uint32_t)(systemObj->dump[MIN_NET_ADDR_NUMBER - 1].measurement[measureObjVref][dbgObjectNameVoltage - dbgObjectNameCurrent]) , measure->adcDataAverage[measureVbat] , ADC_RESOLUTION_16B);
but offset is higher: 30mV above the input voltage.
i check with NUCLEO-H753ZI by run of STM32Cube\Repository\STM32Cube_FW_H7_V1.11.2\Projects\NUCLEO-H743ZI\Examples\ADC\ADC_InternalChannelConversion
and also observed offset around 20mV.
According to DS: https://www.st.com/resource/en/datasheet/stm32h743vi.pdf page 109, Vref has max.15 mv "spread", but the Vbat deviation is not specified.
Please advise.
