NUCLEO-G070RB ADC not working channels 2 to channel 5

Chinna651302 · ‎2026-05-14

Title edited to reflect that this relates specifically to the NUCLEO-G070RB board.

NUCLEO-G070RB in this board ADC channel 0,1 working ,other ADC channel not working is they any reason?

Peter BENSCH · ‎2026-05-15

Welcome @Chinna651302, to the community!

If you look at the schematics of the NUCLEO_G070RB, you will see that the associated pins PA2, PA3 and P5 are already in use, but ADC_IN4 = PA4 is free and should therefore work as an ADC input. Unfortunately, no alternative pins are available for the ADC inputs, so on the NUCLEO you cannot use ADC_IN2, ADC_IN3 and ADC_IN5 without changing the components that are already connected.

Hope that helps?

Regards
/Peter

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Peter BENSCH · ‎2026-05-15

Welcome @Chinna651302, to the community!

If you look at the schematics of the NUCLEO_G070RB, you will see that the associated pins PA2, PA3 and P5 are already in use, but ADC_IN4 = PA4 is free and should therefore work as an ADC input. Unfortunately, no alternative pins are available for the ADC inputs, so on the NUCLEO you cannot use ADC_IN2, ADC_IN3 and ADC_IN5 without changing the components that are already connected.

Hope that helps?

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Chinna651302 · ‎2026-05-15

Hello @Peter BENSCH ,

Thank you for your prompt response. I reviewed the schematics and was able to identify the issue. I appreciate your clear explanation and valuable suggestions.

Regards,

Chinna