Evaluation Board User Guide
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Evaluating the
AD9833
Low Power 12.65 mW, 2.3 V to 5.5 V, Programmable
Waveform Generator
FEATURES
Full featured evaluation board for the
AD9833
evaluation
board
Graphical user interface software for board control and data
analysis
Connector to
EVAL-SDP-CB1Z
system demonstration
platform (SDP) board
Various power supply and reference link options
GENERAL DESCRIPTION
The AD9833 is a 25 MHz low power DDS device capable of
producing high performance sine and triangular outputs. It
also has an on-board comparator that allows a square wave to
be produced for clock generation. Consuming only 13 mW of
power at 3 V makes the AD9833 an ideal candidate for power-
sensitive applications.
The EVAL-AD9833SDZ board is used in conjunction with an
EVAL-SDP-CB1Z SDP board available from Analog Devices, Inc.
The USB-to-SPI communication to the AD9837 is completed
using this Blackfin®-based development board.
A high performance, on-board 25 MHz trimmed general
oscillator is available to use as the master clock for the AD9837
system. Various links and SMB connectors are also available on
the EVAL-AD9833SDZ board to maximize usability.
Complete specifications for the AD9833 are provided in the
AD9833 data sheet, available from Analog Devices, and should
be consulted in conjunction with this user guide when using the
evaluation board.
APPLICATIONS
Biomedical sensors
Bioelectrical impedance analysis
Electrochemical analysis
Impedance spectroscopy
Complex impedance measurement
Nondestructive testing
FUNCTIONAL BLOCK DIAGRAM
EVAL-SDP-CB1Z
MCLK XO
REF196
MCLK
VOUT
AD9833
FSYNC SCLK SDATA
USB
Figure 1.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. A | Page 1 of 12
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SPORT
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TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Evaluation Board Software .............................................................. 3
Installing the Software ................................................................. 3
Running the Software .................................................................. 4
Using the Evaluation Board Software ............................................ 5
Setting Up the Digital Interface .................................................. 5
Evaluation Board User Guide
Select External MCLK Frequency ...............................................6
Loading Frequency and Phase Registers ....................................6
FSK and PSK Functionality..........................................................6
Waveform Options ........................................................................6
Reset and Sweep ............................................................................7
Example of Operation ...................................................................7
Evaluation Board Schematics and Layout ......................................8
Ordering Information .................................................................... 10
Bill of Materials ........................................................................... 10
REVISION HISTORY
8/12—Rev. 0 to Rev. A
Change to Table 1 ............................................................................. 4
4/11—Revision 0: Initial Version
Rev. A | Page 2 of 12
Evaluation Board User Guide
EVALUATION BOARD SOFTWARE
INSTALLING THE SOFTWARE
The EVAL-AD9833SDZ evaluation kit includes the software and
drivers on CD. The software is compatible with Windows® XP,
Windows Vista, and Windows 7.
To install the software, follow these steps:
1.
2.
3.
Install the software before connecting the SDP board to the
USB port of the PC.
Start the Windows operating system and insert the
EVAL-AD9833SDZ evaluation kit CD.
Download the AD9833SDZ LabVIEW® software. The correct
driver, SDPDriversNET, for the SDP board should download
automatically after LabVIEW is downloaded, supporting
4.
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both 32- and 64-bit systems. However, if the drivers do not
download automatically, the driver executable file can also
be found in the
Program Files/Analog Devices
folder.
Follow the on-screen prompts to install the SDPDriverNet
Version 1.3.6.0.
After installation of the software and drivers is complete, plug
the EVAL-AD9833SDZ into the SDP board and the SDP
board into the PC using the USB cable included in the box.
When the software detects the evaluation board, proceed
through any dialog boxes that appear to finalize the
installation (Found
New Hardware Wizard/Install the
Software Automatically
and so on).
5.
Figure 2. Hardware Device Manager Window with SDP Board Plugged In
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RUNNING THE SOFTWARE
To run the evaluation board program, do the following:
1.
2.
Click
Start/All Programs/Analog Devices/AD9833/
AD9833 Eval Board.
If the SDP board is not connected to the USB port when
the software is launched, a connectivity error displays (see
Figure 3). Simply connect the evaluation board to the USB
port of the PC, wait a few seconds, click
Rescan,
and follow
the instructions.
Ensure that all links are in their correct locations (see Table 1).
The main window of the AD9833DBZ evaluation software
then opens, as shown in Figure 4.
Link No.
LK1
LK2
LK4
Evaluation Board User Guide
Table 1. Default Setup for Link Positions
Position
Out
A
A
Function
Decouple the CAP/2.5V pin to ground
because V
DD
is >2.7 V.
On-board linear regulator selected to
supply power to the general oscillator.
3.3 V digital supply for the
AD9833
supplied
from the
EVAL-SDP-CB1Z SDP
board.
3.
Figure 3. Pop-Up Window Error
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Evaluation Board User Guide
USING THE EVALUATION BOARD SOFTWARE
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Figure 4. AD9833 DDS Evaluation Software
SETTING UP THE DIGITAL INTERFACE
The first software step in setting up the
AD9833
to make some
measurements is to set the
DIGITAL INTERFACE
value. The
EVAL-SDP-CB1Z
has two connectors plugs:
connectorA
and
connectorB.
Select the connector you want to use with the
AD9837 evaluation board from the drop-down box.
The SPI
Frame Frequency
(/SYNC) box and
SCLK Frequency
box can also be set in this window. If the SPI interface speed has
not been decided, leave the default values shown in Figure 5.
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Figure 5. Digital Interface
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