Evaluation Board User Guide
EVAL-AD7450A/EVAL-AD7451
Rev. A | Page 17 of 28
GENERATING A HISTOGRAM OF THE ADC CODE
DISTRIBUTION
The
Histogram
tab can be used to perform ac testing or, more
commonly, dc testing. This tab shows the ADC code distribution of
the input and computes the mean and standard deviation, which
are displayed as
Mean
and
Transition Noise
, respectively, in the
Histogram Analysis
area (labeled 1 in Figure 19).
AC Input
To perform a histogram test of ac input,
1.
Apply a signal source to the J1/J2 input connectors.
2.
Click the
Histogram
tab from the main window.
3.
Click
Sample
.
Raw data is then captured and passed to the PC for statistical
computations, and various measured values are displayed in
the
Histogram Analysis
area.
DC Input
More commonly, the histogram would be used for dc testing,
where the user tests the ADC for the code distribution for dc
input and computes the mean and standard deviation, or
transition noise of the converter, which are displayed as
Mean
and
Transition Noise
, respectively, in the
Histogram Analysis
area (labeled 1 in Figure 19).
Raw data is then captured and passed to the PC for statistical
computations, and various measured values are displayed in
the
Histogram Analysis
area.
06231-
017
Figure 19. Histogram Capture Tab
