ADC fastest channel sampling rate

Question

I need to sample ADC channel at the fastest deterministic rate. 
 If i use burst mode with 3us acquisition time, do i get a sample exactly every 5us? 
 does t(conv) is always 2us or does it vary? 
 should i use a timer instead of burst mode to get the rate predicted? 
 If yes - can i use timer that clocks every 5us when using t(acq)=3us? or can i go lower?

Jørgen Holmefjord · Accepted Answer

Like I said, BURST will only work with OVERSAMPLE, and you will only get out the averaged sample in the buffer, not every sample. 
 You need to setup a timer to trigger sample every 5 µs, this is the fastest way to sample the channel 1000 times. 
 Typical <2 µs is what the specification say. I have never seen or heard about higher values. You should be fine with 5 µs sample interval. 
 Best regards, Jørgen

Jørgen Holmefjord · Answer

This most likely happens because you have 3 channels enabled. Whenever your timer triggers the SAMPLE task, the SAADC will sample every enabled channel consecutively (see scan mode ).

ADC fastest channel sampling rate

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