How to use the VREFINT as Vref for adc?

Ilyas · ‎2023-10-10

Hi, I'm using stm32l432kb and I want to use the internal reference voltage Vrefint as reference voltage for the AD converter. Is this possible?

Regards

TDK · ‎2023-10-10

No, VREFINT is not available as a VREF source. It's not a particularly accurate reference anyway. And it's below the allowable range.

You can use ~~VREFBUF, or~~ VDDA. (Can't use VREFBUF as VREF+ is tied to VDDA.)

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TDK · ‎2023-10-10

No, VREFINT is not available as a VREF source. It's not a particularly accurate reference anyway. And it's below the allowable range.

You can use ~~VREFBUF, or~~ VDDA. (Can't use VREFBUF as VREF+ is tied to VDDA.)

If you feel a post has answered your question, please click "Accept as Solution".

Tesla DeLorean · ‎2023-10-10

No it's designed for you to measure and dereference the reported values vs the range of the ADC. Using a voltage that is "known"

Basically ratios, so elementary school type math involved.

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