Ac Testing-Histogram; Dc Testing-Histogram - Analog Devices AD7366 User Manual

UG-408
AC TESTING–HISTOGRAM
Figure 17 shows the histogram capture tab. This tests the ADC
for the code distribution for ac input. In addition, it 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 from the test selection window and click Start.
Note that an ac histogram needs a quality signal source applied
to the input SK1/SK3 connectors. Figure 17 shows the histo-
gram for a 50 kHz sine wave applied to the ADC input with the
results calculated.
Figure 17. Histogram Capture Tab
The area labeled as 1 in Figure 17 Illustrates the different
measured values for the data captured.
DC TESTING–HISTOGRAM
More commonly, the histogram is for dc testing. In these cases,
a 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 the Histogram tab from the test selection
window and click Start.
Rev. A | Page 16 of 20
Evaluation Board User Guide