How can I increase the ADC sampling frequency up to 2 MHZ?

[Daniel Collado]

I have only been able to increase it up to 600 KHz. I have studied the speed the ADC peripheral should have and should be even higher, it can be set at up to 84 MHz, with a prescaler of 2 and 6 bits of conversion should be 9 cycle clocks, resulting this on 4 MHz, but it is still acquiring at 600 KHz. What can be wrong?

[waclawek.jan]

Using DMA?

JW

[Daniel Collado]

No, without DMA, getting the data directly from the register.

[waclawek.jan]

Then maybe that "getting data directly from register" is the limiting factor.

JW

[henry.dick]

You may be talking about a few things. While you can drive the adc with a high speed clock, it takes more than one clock cycle to sample and convert the analog signal.

All of that is spelled out in the datasheet.