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Number of the ADCs in STM32F103RB

Mykola_Levun
Associate III

‎2025-02-06 05:40 AM - last edited on ‎2025-02-06 06:50 AM by

Hello,
I look at the STM32F103RB datasheet and see that this microcontroller should have 2  ADCs. When I open Table 5 (see Figure 1 below in this post) in this datasheet, I see only ADC12_IN10 and so on, that is, only ADC12. Why?

Mykola_Levun_0-1738849201381.png

                              Figure 1

 

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SofLit
ST Employee

‎2025-02-06 05:52 AM

Hello,

From the datasheet ADC12 starts from IN0. Could you please double check?

SofLit_0-1738849916350.png

 

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Mykola_Levun
Associate III
In response to SofLit

‎2025-02-06 05:57 AM

Yes, starts from IN0. You didn't understand the question. ADC12 maybe it's ADC1 and ADC2?

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SofLit
ST Employee
In response to Mykola_Levun

‎2025-02-06 05:59 AM - edited ‎2025-02-06 06:48 AM

No. ADC12_INx means it's a shared channels between ADC1 and ADC2 (two separated ADCs).

Used for example to Speed up the conversion using the interleaved mode, both ADCs are converting the same channel:

SofLit_0-1738850523119.png

Refer also to this application note AN3116 "STM32™’s ADC modes and their applications" / section 2.2 Dual fast interleaved mode:

SofLit_1-1738850861461.png

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.
PS:
1 - This is NOT an online support (https://ols.st.com) but a collaborative space.
2 - Please be polite in your reply. Otherwise, it will be reported as inappropriate and you will be permanently blacklisted from my help.
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