Wrong voltage typed at Vrefint STM32C092

I have followed the datasheets and tried to calculate my reference voltage. I am supplying steady 3V on Vref+ pin but I wanted to confirm this because I have some troubles with the ADC precision.

So I read the internal voltage both on my card and on a nucelo-C092rc. This is my results:

My board:

Vref+ = 3.0 * 1659 / 1805 = 2.755

Nucelo board:

Vref+ = 3.0 * 1665 / 1641 = 3.043

However I am quite certain that the nucelo boards are using 3.3 V as reference and my board are using 3 V as reference.

So if I swap the 3.0 V from the datasheet into 3.3 V I get the following:

My board:

Vref+ = 3.3 * 1659 / 1805 = 3.033

Nucelo board:

Vref+ = 3.3 * 1665 / 1641 = 3.348

Which match more my expectations, can someone confirm or deny this typo?

I add my adc init function:

u16 uiDelay = 0;

 ADC_CFGR2.CKMODE = 0x0; // Clock mode set to ADCCLK
 ADC_CCR.PRESC = 0x2; // ADC prescaler set to 48MHz / 4 = 12MHz
 ADC_CFGR1.RES = 0x0; // Set 12 bit resolution

 ADC_SMPR = 0x07; // Sampling time set to 1,5 ADC clock cycles, ADC_ACTIVE_CHANNELS*Sampling time should be less than the ISR period to insure we have new
 // measurements
 ADC_CCR.VREFEN = 1; // Enable VREFINT

 ADC_CFGR1.EXTEN = 0x1; // Trigger ADC rising edge
 ADC_CFGR1.EXTSEL = 0x0; // Trigger conversion on TIM1_TRGO
 ADC_CFGR1.SCANDIR = 0; // 0 = scan from CHSEL0 to max
 ADC_CFGR1.ALIGN = 0; // Right data align AC results

 ADC_CHSELR = ADC_ACTIVE_CHANNELS; // Select channels to be scanned

 ADC_CR.ADVREGEN = 1; // Enable the ADC Voltage regulator
 for (int i = 0; i < ADC_SETUP_TIME; i++); // After ADC_CR.ADVREGEN is set, the mcu have to wait t_ADCVREG_STUP before calibration, see datasheet

 ADC_CR.ADCAL = 1; // Initiate calibration of the ADC
 while (ADC_CR.ADCAL); // Loop until the calibration is complete

 ADC_CR.ADEN = 1; // Enable the ADC

 while (ADC_ISR.ADRDY == 0) // After ADC_CR.ADEN is set it needs the time t_STAB to be ready, see datasheet.
 {
 uiDelay++;
 if (uiDelay > ADC_SETUP_TIME) // If the ADC is not ready after some time, re-enable it.
 {
 uiDelay = 0;
 ADC_CR.ADEN = 1;
 }
 }

 DMA1.DMA_CH1.CPAR = (u32)(&(ADC_DR)); // Set DMA to read from ADC data register
 DMA1.DMA_CH1.CMAR = (u32)(gv_vuiADC_RSLT); // Write destination

 DMA1.DMA_CH1.CNDTR = ADC_Last; // No of bytes to be processed acc to datasheet??? #no of channels according to example

 DMA1.DMA_CH1.CCR.MSIZE = 1; // Memory size is 16 bits
 DMA1.DMA_CH1.CCR.PSIZE = 1; // Peripheral size is 16 bits
 DMA1.DMA_CH1.CCR.MINC = 1; // Enable memory increment mode
 DMA1.DMA_CH1.CCR.CIRC = 1; // Circular adressing
 DMA1.DMA_CH1.CCR.DIR = 0; // Read from peripheral

 DMAMUX_C0CR.DMAREQ_ID = 0x05; // Set DMA request identification, ADC is 5;
 DMAMUX_C0CR.EGE = 0; // Event generation disabled
 DMAMUX_C0CR.SE = 0; // Sync Disabled
 DMAMUX_C0CR.NBREQ = 0x01; // Number of DMA requests

 u16 uiGarbage = ADC_DR; // Read the ADC Data register to clear prior conversion flags

 ADC_CFGR1.DMAEN = 1; // Enable DMA
 ADC_CFGR1.DMACFG = 1; // Circular mode

 DMA1.DMA_CH1.CCR.EN = 1; // Enable DMA

 ADC_CR.ADSTART = 1; // Start a conversion