STM32H745 DAC2 missing

[mosamasa]

Hi,

I would need dual DAC using STM32H745. According to datasheet, it should have two DAC converters. In STM32CubeIDE, I can see only DAC1 with two channels. In the datasheet, I can only see DAC1_OUT1 and DAC1_OUT2 pins, but no DAC2 out pins. Is there DAC2 available in STM32H745?

[SofLit]

Hello,

There is only one DAC with two channels on this product in the datasheet:

In CubeMx:

Hope that answers your question.

[mosamasa]

Hi,

I'm a bit confused as everywhere has stated two DAC:

So, there is error in datasheet? Even product selector claims that there are two DACs. Is there any model of STM32H7 family, which actually has dual DAC?

[AScha.3]

Hi,

There is a dac module with 2 channels, out1 and out2 ; these are the outputs of the two DAC.

Just the name is not what you expected.

[mosamasa]

Hi,

So, is it possible the get two independent DAC outputs? I would need two 12bit synchronous analog outputs.

[SofLit · Accepted solution]

Hello,

Are you asking for F7 or H7? and which H7 part number? they are different!

Please refer to the reference manual DAC implementation section of the correspondent product:

For example STM32G4 has 4 DACs:

This is for STM32H743. It has One DAC with 2 channels.

[mosamasa]

I meant STM32H745. There is typo in title.

[SofLit]

STM32H745 and STM32H743 have the same DAC implementation. So you have one DAC instance with two channels (DAC1_OUT1/DAC1_OUT2).

But indeed there is an issue in the second screenshot DAC2_OUT needs to be DAC1_OUT2 and DAC1_OUT has '1' is missing.

[Andrew Neil]

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@mosamasa wrote:

So, is it possible the get two independent DAC outputs? I would need two 12bit synchronous analog outputs.

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Answered here:

https://community.st.com/t5/stm32-mcus-products/can-i-use-two-dac-channels-to-generate-independent-signal-on/td-p/750854