EVAL-AD7898CB Datasheet, PDF (7/13 Pages) Analog Devices – Evaluation Board for 5V, 12-Bit, Serial 220kSPS ADC in 8-Pin Package

EVAL-AD7898CB
Figure 3 AD7898 Main Screen - Histogram Mode
Setup Screen
The Setup Screen is responsible for allowing the user to load
the AD7898 configuration file for the evaluation board. The
configuration file will give the software detailed information
about the AD7898 evaluation board and part connected to the
Evaluation Board Controller such as number of bits, maxi-
mum sampling rate, power supply requirements etc. The
AD7898 configuration file also tells the software the name of
the DSP program file which it should download to the
Evaluation Board Controller. 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, the
Evaluation Board Controller and how AD7898 software
should be set up for the user to begin using the complete
system. The Evaluation Board Controller and AD7898
evaluation board should be connected together (via the 96
way connector). The power should be applied to the Evalu-
ation Board Controller. At this stage the red LED should be
flashing which indicates that the Evaluation Board Control-
ler is functional and ready to receive instructions. The
AD7898 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 Controller.
Running the AD7898 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 lists all the
available configuration files. The configuration files are text
based files which contain information about the particular
evaluation board to be tested - AD7898.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
AD7898.cfg configuration file and click Load. The Evalua-
tion 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. The user should
next select the Mode 1 option button to place the part into
Mode 1 operation (the mode of operation of the evaluation
board).
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