• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 299 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MSPM0G1507: MSPM0 ADC Time Sampling

RNJ
Prodigy 30 points
Part Number: MSPM0G1507

Tool/software:

Hi, I'm checking the minimum sampling time for a best high resolution acquisition of a A/D source and got in trouble with some information about Ti documents.

The first question is what is the settling error time parameter? The only detail about this is showed on Temperature Sensor settling error time; and for other types of generic A/D input?

The second question is that is a different approach in the hardware design guide, follows:

The approach is not the same, the settling error is changed and used as a fix value (this not match the temperature settling error of 10us by the way).

Could anyone help me understand which of these equations is the best approach and why these differences?

  • +1
    TI__Genius 12502 points

    Hi, 

    RNJ said:
    The first question is what is the settling error time parameter?

    It's an error parameter, we can use 0.1% or 0.01 = 1%.

    You can use this excel file to calculate minimum sampling time.

    ADCTsampleCalculation.xlsx

    RNJ said:
    Could anyone help me understand which of these equations is the best approach and why these differences?

    The first is using settling error to calculation while the second one is calculate minimum sample time for an n-bit conversion without settling error.

    Regards,

    Helic