Datasheet
EVAL-AD7352/AD7356/AD7357
Rev. 0 | Page 10 of 16
Histogram Tab
This tab displays a histogram of the captured ADC codes. It can
be used to provide an indication of the ADC’s performance in
response to dc inputs. The Histogram Analysis section contains
information about the samples taken, for example, the maximum
and minimum codes captured.
FFT Tab
This tab displays a fast Fourier transform (FFT) plot. The FFT is
typically used for examining the ADC’s performance in the
frequency domain. The Spectrum Analysis section contains
information about the samples taken, for example, the ac
specifications.
You can choose to display the information for ADC A, ADC B,
or both in the window using the VA O N / O F F and VB ON/OFF
buttons, as explained in the Wave form Tab section.
Summary Tab
This tab displays a summary of the graphs shown in the
Wave form , Histogram, and FFT tabs.
Linearity Tab
In the Linearity tab, you can select the maximum number of
hits per code. Code 0 and Code 4095 are not included for this
calculation. The default number is set at 1000. To initiate
conversions and perform the linearity routine, click Get
Linearity Data. This instructs the EVAL-CED1Z board to take
the required number of samples at a specific frequency from the
evaluation board. Both the Max Hits Per Code control and the
Get Linearity Data button are located on the top right side of
the Linearity tab.
The samples are then uploaded and processed. The INL and DNL
are calculated during the processing. The results are displayed
in the Histogram, DNL, INL, and Summary subtabs.
The Linearity Analysis is displayed at the bottom of the
Linearity tab. This section contains information about the
samples taken, as well as the worst-case positive (WCP) and
worst-case negative (WCN) INL and DNL data.
Histogram Tab
This tab displays a histogram of the captured ADC codes.
DNL Tab
This tab displays a plot of the DNL results.
INL Tab
This tab displays a plot of the INL results.
Summary Tab
This tab displays the histogram, INL, and DNL plots in one window.