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Tiva C Series tm4c123gh6pm ADC

majid
Expert 1150 points
Other Parts Discussed in Thread: TM4C123GH6PM

Hi,

I want to know maximum sampling rate of each ADC on tm4c123gh6pm.

If it is 1MHz, and if we use both ADSs together we can reach to 2MSPS. Is it correct?

Thanks

  • 0
    TI__Guru**** 244380 points

    Hello Majid,

    Each ADC is capable of sampling at 1MSPS. By using the Phase Shift feature and both ADC together to sample the channel it can go upto 2 MSPS.

    Regards

    Amit

  • 0
    Guru 117850 points

    majid shokoufi said:
    if we use both ADCs together we can reach to 2MSPS. Is it correct?

    Almost correct - suspect you can promote your assertion to fully correct via read/review of MCU manual's detail of ADC's, "Sample Phase Control."  Your description, "together" needs some further detailing.

    To double the sample rate - as you seek - requires you to route the same (proper) analog signal to both ADC0 & ADC1.  You then sample that signal at non-overlapping, ADC phase angles.  (usually - but not always 180°)

    My MCU manual details as follows: "The two modules can be be synchronized using the GSYNC and SYNCWAIT
    bits in the ADC Processor Sample Sequence Initiate (ADCPSSI) register.  Software could then combine the results from the two modules to create a sample rate of two million samples/second.  Believe this helps to confirm (while detailing the "how") your belief...