STM32G431KB: I need for my project an analog value between 0 and 5V. It seems like the MAX DAC Value is only 3.3V. Is it possible to change the range of the DAC somewhere in STM32CubeIDE or do I need to do it external?

MSpir.2 · ‎2022-03-07

Peter BENSCH · ‎2022-03-07

Welcome, @MSpir.2, to the community!

For this application, there are amplifier circuits that turn a smaller voltage into a larger one. In your case, you would have to use a non-inverting amplifier with a gain factor of 5V/VDD (if VDD=3.3, then =5/3.3), which can be realised quite easily with a low-voltage opamp with RRIO pins (rail-to-rail input and output).

Does it answer your question?

Regards

/Peter

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Peter BENSCH · ‎2022-03-15

Do you need additional hints?

Regards

/Peter

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