EVAL-AD7922_15 Datasheet, PDF (9/16 Pages) Analog Devices – Evaluation Board for 1 MSPS, 2-Channel, 12-/10-Bit ADCs

Taking Samples
When the user clicks Sample, the software instructs the EVAL-
CONTROL-BRD2 to take the required number of samples at
the required frequency from the evaluation board. The AD7912/
AD7922 evaluation board runs up to 1 MSPS. Therefore, the
user can choose the sampling frequency up to this rate and can
also choose the number of samples to be taken. These samples
are then uploaded and displayed. An FFT and histogram are
also calculated and displayed. If the user clicks Continuous, the
software repeats the process indefinitely until the user clicks
Stop (the Sample button becomes the Stop button when
Continuous is selected). While the software is continuously
sampling data, the other control buttons are disabled.
Other Buttons
Clicking Reset causes the EVAL-CONTROL-BRD2 to perform
a reset function. When this happens, the power supplies are turned
off and the program in DSP memory is lost. The user should repeat
the setup instructions to download another program if required.
Clicking Quit exits the software, but the program running on
the EVAL-CONTROL-BRD2 is not terminated.
EVAL-AD7912/AD7922
MENU BAR ITEMS
The main dialog box of the EVAL-CONTROL-BRD2 contains a
number of options available as pull-down menu items. The
functions of these are listed as follows.
File Menu
Setup Menu
Selecting this option displays the Setup Menu dialog box
(shown in Figure 5).
Load Raw Data
Selecting this option allows the user to load data that had been
saved by the software during a previous session.
Save Raw Data
Selecting this option allows the user to save the current
set of sample data points. The data can be reloaded to the
EVAL-CONTROL-BRD2 software later or can be used by other
programs for further analysis.
Save Binary Data
Selecting this option allows the user to save the current set of
sample data points. The data is saved in binary format as a text
file. This method can be useful for examining code flicker,
looking for stuck bits, and so on.
Save FFT Data
Selecting this option allows the user to save the current set of
FFT data points. FFT data cannot be reloaded into the EVAL-
CONTROL-BRD2 software but can be loaded into other
software packages for further analysis.
Exit
Quits the program.
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