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Value of internal ADC reference voltage STM32WB55RGV6

PStra.3
Associate II

Hello.

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

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

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1 ACCEPTED SOLUTION

Accepted Solutions
Uwe Bonnes
Principal III

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.

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3 REPLIES 3
Uwe Bonnes
Principal III

Voltage reference buffer and Embedded voltage reference are different devices.

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

Uwe Bonnes
Principal III

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.