Jimmy Moo

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6 years ago.

stm32l432kcu6 adc resolution

Hello,

I used mbed to program the nucleo-l432kc board and the analogin gave me a resolution of 12bits. I made a custom PCB with the stm32l432kcu6 chip and ran the same mbed program. Everything else, incluing the DAC seems to be working. However, the ADC resolution is limited to 7bits.

What is a potential source of this issue?

Thanks

2 Answers

Helmut Tschemernjak
6 years ago.

Hi Jihong Min, can you post a ADC sample code.

David Thedens
6 years ago.

I would also request the schematic for the analog portion of the project. What is used for VRef+ and VRef-. I am suspecting digital noise is on these analog pins, I would also suspect insufficient filtering (bypass caps) on voltage rails including VDDA. Should be easy to check these out with an oscilloscope.