How to use the VREFINT as Vref for adc?

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

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Best answer by TDK

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.)

TDKAnswer

Super User

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.)

Graduate II

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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