Question about SAR ADC in STM32H753

[RongShengWang]

Questions:

1. Does STM32H753 have three independent 16-bit SAR ADC modules?

    Any other STM32 parts also have 16-bit SAR ADC modules?

2. Can a selected channel in each 16-bit SAR ADC module (Totally 3 selected channel in the 3 modules) be sampled simultaneously under the same clock rate?

3. How are the Direct /Fast /Slow channels in SAR ADC defined?

4. Which STM32H753 is used in NUCLEO board? (VI, ZI, AI......)

Thanks,

Rong

[AScha.3 · Accepted solution]

1. look in ds. + yes, see cpu selection tool.

2. yes

3. see in ds . The analog mux makes some channels a little bit faster - or slower.

4. just check from the boards avail.

[RongShengWang]

1. look in ds. + see cpu selection tool.

Below shows  having 3 of16-bit ADCs - Are they independent?

Below shows STM32H753ZI has 2 direct channels, 9 fast channels, 17 slow channels.

                                              Are they independent? Or only  2 direct channels independent?

Thanks

Rong

[AScha.3]

>Below shows  having 3 of16-bit ADCs - Are they independent?

yes.

> Are they independent? Or only  2 direct channels independent?

yes, independent .

see AN5354 :

You should read yourself, see rm :

So 1+2 can work in dual mode...but also separate.

[SofLit]

Hello @RongShengWang 

This thread is related to a previous thread: https://community.st.com/t5/stm32-mcus-boards-and-hardware/which-mcu-in-stm32-family-is-the-best-selection-for-using-sar-16/td-p/740651

Please accept as solution the comment that answered your question in that thread.

Thank you for your understanding.

[RongShengWang]

.1. What means "ADC1 and ADC "tightly coupled"? Can they be coupled and also decoupled?

 2. All ADCs have 2 Direct channels. What does "direct" mean?

3. Can all ADC sampling be simultaneously under the same clock?

Thanks, 

[RongShengWang]

Minor corrections to the previous question submission:

1. What means "ADC1 and ADC2 "tightly coupled"?

2. Can they be coupled and also decoupled?

3. All ADCs have 2 Direct channels. What does "direct" mean?

4. Can all ADC's channels sampling be simultaneously (one channel in each SAR ADC at a time) under the same clock rate?

Thanks, 

Peter