AD7091R User Guide
UG-409
Rev. 0 | Page 11 of 20
Figure 16. Histogram Capture Tab
AC TESTING—HISTOGRAM
Figure 16 shows the histogram capture tab. This tests the ADC
for the code distribution for the 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 the
Histogram
tab in the evaluation software main window and
click the
SAMPLE
button.
Note that an ac histogram requires a quality signal source
applied to the input VIN/VINB connectors.
DC TESTING—HISTOGRAM
The histogram is more commonly used for dc testing. Similar to
ac testing, this tests the ADC for the code distribution for the dc
input and computes the mean and standard deviation, or transi-
tion 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 the
Histogram
tab in the evalua-
tion software main window and click the
SAMPLE
button.
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