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Evaluation Board User
Guide
AC TESTING - HISTOGRAM
Figure 17 shows the histogram capture tab. This tests the ADC
for the code distribution for AC input and computes the mean
and standard deviation, or transition noise of the converter and
displays the results.
Raw data is captured and passed to the PC for statistical
computations. To perform a histogram test, select "Histogram"
tab from the test selection window and click on the "Start"
button.
Note: an AC histogram needs a quality signal source applied to
the input SK1/SK3 connectors. Figure 17 shows the histogram
for a 50kHz sinewave applied to the ADC input and the results
calculated.
Figure 17. Histogram Capture Tab
1.
DC TESTING - HISTOGRAM
More commonly, the histogram would be used for DC testing.
Where user tests the ADC for the code distribution for DC
input and computes the mean and standard deviation, or
transition noise of the converter and displays the results. Raw
data is captured and passed to the PC for statistical
computations. To perform a histogram test, select "Histogram"
tab from the test selection window and click on the "Start"
button.
Rev. PrA | Page 17 of 28
Illustrates the different measured values for the data
captured.
UG-xxx-AD7276
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