Can the 3 ADCs of STM32F767ZI be synchronized in continuous mode?

[b.a.]

I would like to sample 3 channels simultaneously and continuously.

The plan is to use the ADC in continuous operation and DMA.

Is it possible to have all 3 ADC sample at the same time?

And if so, how can this be achieved?

[Tesla DeLorean]

Yes, that would be Triple Simultaneous mode. The ADC can trigger off a single source, and pull via DMA from the CDR (Common Data Register)

[b.a.]

Do I have to define a trigger source for continuous operation?

Is there an example for this mode of operation somewhere?

[Tesla DeLorean]

Generally I don't drive the ADC into saturation.

I'd use a trigger, but if you enable the continuous operation it will continue in a tight loop provided the DMA continues to service it.

I'd use the DMA as a double length buffer, circular, managing ping/pong operation via HT and TC interrupts.

I'm sure there are examples if you look under the HAL trees.