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參數(shù)資料
| 型號(hào)： | EVAL-AD7898CB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Evaluation Board for 5V, 12-Bit, Serial 220kSPS ADC in 8-Pin Package |
| 中文描述： | 評(píng)估板為5V，12位，串行220kSPS ADC的8引腳封裝 |
| 文件頁(yè)數(shù)： | 7/13頁(yè) |
| 文件大小： | 424K |
| 代理商： | EVAL-AD7898CB |
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EVAL-AD7898CB
REV. 0
–7–
Figure 3 AD7898 Main Screen - Histogram Mode
Setup Screen
T he Setup Screen is responsible for allowing the user to load
the AD7898 configuration file for the evaluation board. T he
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. T he
AD7898 configuration file also tells the software the name of
the D SP program file which it should download to the
Evaluation Board C ontroller. T hese files are supplied by
Analog Devices with the evaluation board. Figure 4 shows
the Setup Screen.
S E T T ING
C O NT R O L L E R
T he following text describes how the evaluation board, the
Evaluation Board C ontroller and how AD 7898 software
should be set up for the user to begin using the complete
system. T he E valuation Board C ontroller and AD 7898
evaluation board should be connected together (via the 96
way connector). T he 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. T he
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. T his will ensure
that the printer port has been initialized properly. T he printer
port cable can then be connected between the PC and the
Evaluation Board C ontroller.
U P
T H E
E V A L U A T IO N
B O A R D
R unning the AD 7898 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
. T his will display the setup
form. A window on the left of the setup form lists all the
available configuration files. T he configuration files are text
based files which contain information about the particular
evaluation board to be tested - AD7898.cfg. T he information
will cover such things as the part name, number of samples
to be taken, default and maximum sampling frequency power
supply settings etc. T he configuration file also contains the
name of the DSP program file which is to be downloaded to
the Evaluation Board Controller. T he user should select the
AD7898.cfg configuration file and click
L oad
. T he 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. T he
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. T he 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. T he 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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