EVAL-AD7475 Datasheet, PDF (7/13 Pages) Analog Devices – Evaluation Board for 1MSPS, 12-Bit ADC

EVAL-AD7475/AD7495CB
Figure 3 AD7898 Main Screen - Histogram Mode
Setup Screen
The Setup Screen is responsible for allowing the user to load
the AD7475/AD7495 configuration file for the evaluation
board. The configuration file will give the software detailed
information about the AD7475/AD7495 evaluation board
and part connected to the Evaluation Board Controller such
as number of bits, maximum sampling rate, power supply
requirements etc. The AD7475/AD7495 configuration file
also tells the software the name of the DSP program file
which it should download to the Evaluation Board Control-
ler. These files are supplied by Analog Devices with the
evaluation board. Figure 4 shows the Setup Screen.
SETTING UP THE EVALUATION BOARD
CONTROLLER
The following text describes how the evaluation board
Evaluation Board Controller and how AD7475/AD7495
software should be set up for the user to begin using the
complete system. The Evaluation Board Controller and
AD7475/AD7495 evaluation board should be connected
together (via the 96 way connector). The power should be
applied to the Evaluation Board Controller. At this stage the
red LED should be flashing which indicates that the Evalu-
ation Board Controller is functional and ready to receive
instructions. The AD7475/AD7495 software which should
have been installed should be loaded before the printer port
cable is connected between the Evaluation Board Controller
and the PC. This will ensure that the printer port has been
initialized properly. The printer port cable can then be
connected between the PC and the Evaluation Board Con-
troller.
Running the AD7475/AD7495 Software
With the hardware setup the user is now in a position to use
the software to control the Evaluation Board Controller and
evaluation board. In the software the user should select the
File menu and click on Setup. This will display the setup
form. A window on the left of the setup form list all the
available configuration files. The configuration files are text
based files which contain information about the particular
evaluation board to be tested - AD7475/AD7495.cfg. The
information will cover such things as the part name, number
of samples to be taken, default and maximum sampling
frequency power supply settings etc. The configuration file
also contains the name of the DSP program file which is to
be downloaded to the Evaluation Board Controller. The user
should select the AD7475.cfg configuration file and click
Load. The AD7475.cfg file will work for both the AD7475
and the AD7495. The Evaluation Board Controller will be
reset and the DSP program will be downloaded. When the
download has been completed the power supply settings
indicated in the configuration file are set and the user may
hear some of the relays clicking. The pull-down menus items
such as number of samples and sampling frequency will have
been set to the default values specified by the configuration
file. The user is free to change these at will. Once all the
settings had been decided the user can click Close to return
to the main form.
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