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ADC average driver using the IO processor (IOP) in the MPC5510 family

Posted: 07 Aug 2009     Print Version  Bookmark and Share

Keywords:MPC5510 eQADC  buffer  processor 

This application note describes the implementation of an averaging sample buffer by using the eQADC module in the 5510 family. This solution provides you the way to average multiple samples from the eQADC module at a certain sample rate.

In real-world applications there are occasions when it may be inappropriate to use a single ADC conversion result. Although the result is a correct conversion of the analogue value that existed at input an external disturbance may have caused it to be unrepresentative of the signal of interest.

This is of particular concern, where a short series of results is disturbed by some undesired noise at input.

One way of addressing this problem and rejecting disturbance, is to average the incoming ADC values and extract the longer-term value of the signal. This is most effective when the desired signal changes slowly.

View the PDF document for more information.





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