Value of internal ADC reference voltage STM32WB55RGV6

[PStra.3]

Hello.

What is the value of the internal reference voltage of STM32WB55RGV6 MCU?

Is it 1,212 V or 2,048 / 2,5 V?

[Uwe Bonnes]

Voltage reference buffer and Embedded voltage reference are different devices.

[PStra.3]

Do you mean these are two different sources of ADC reference voltage?

[Uwe Bonnes · Accepted solution]

VREFINT is an internal reference voltage. It can get connected to some ADC input. REF_BUF when used is connected to the ADC VREF input.