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M
Mykola_Levun
Graduate II
February 6, 2025
Solved

Number of the ADCs in STM32F103RB

  • February 6, 2025
  • 1 reply
  • 733 views

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

 

    This topic has been closed for replies.
    Best answer by mƎALLEm

    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

    1 reply

    M
    mƎALLEm
    Technical Moderator
    February 6, 2025

    Hello,

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

    SofLit_0-1738849916350.png

     

    M
    Mykola_LevunAuthor
    Graduate II
    February 6, 2025

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

    M
    mƎALLEmAnswer
    Technical Moderator
    February 6, 2025

    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

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