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Malfunction of ADC123_IN1 in Nucleo-F756ZG

Ryosuke
Associate

‎2024-12-15 04:00 PM - last edited on ‎2024-12-23 07:36 AM by

I'm in trouble with the high err rate of ADC123_IN1 in "STM32 Nucleo-144 development board with STM32F756ZG MCU".

I've purchased two of the same thing, and both of them have trouble in ADC123_IN1.

I had tried 4 channels: ADC123_IN1, ADC123_IN4, ADC123_IN8, ADC123_IN2, but only ADC123_IN1 has high err rate.

Could you tell me how to get ADC value accurately.

I attached ADC measurement results just in case. (ADC_measurement_results.PNG)

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SofLit
ST Employee

‎2024-12-23 07:12 AM

Hello,

You need to check first what is connected to each channels? did you check the board schematics? what is the voltage sources? what is the value of the sampling time? 

Please also review this application note AN2834 "How to optimize the ADC accuracy in the STM32 MCUs"

 

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