Evaluation Board User Guide
UG-319
One Technology Way • P. O . Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel : 781.329.4700 • Fax : 781.461.3113 • www.analog.com
Evaluating the AD9835 200 mW Power, 5 V,50 MHz CMOS Complete DDS
FEATURES
Full featured evaluation board for the AD9835
evaluation board
Graphic user interface software for board control and
data analysis
Connector to the EVAL-SDP-CB1Z system demonstration
platform (SDP) board
Various power supply and reference link options
APPLICATIONS
DDS tuning
Digital demodulation
FUNCTIONAL BLOCK DIAGRAM
GENERAL DESCRIPTION
The AD9835 is a numerically controlled oscillator employing a
phase accumulator, a sine lookup table and a 10-bit digital-toanalog converter integrated on a single CMOS chip. Modulation
capabilities are provided for phase modulation and frequency
modulation.
The EVAL-AD9835SDZ board is used in conjunction with a
EVAL-SDP-CB1Z board available from Analog Devices, Inc. The
USB-to-SPI communication to the AD9835 is completed using
this Blackfin®-based development board.
A high performance, on-board 50 MHz trimmed general oscillator
is available to use as the master clock for the AD9835 system.
Various links and SMB connectors are also available on the
EVAL-AD9835SDZ board to maximize the usability.
Complete specifications for the AD9835 are provided in the
AD9835 data sheet, available from Analog Devices, and should
be consulted in conjunction with this user guide when using the
evaluation board.
EVAL-SDP-CB1Z
USB
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
MCLK XO
MCLK
PSEL0
GPIO
SPI
Rev. B | Page 1 of 12
PSEL1
FSELECT
SCLK SDAT AFSYNC
Figure 1.
AD9835
ADP3301
IOUT
10177-001
UG-319 Evaluation Board User Guide
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
Setting up the Digital Interface................................................... 5
REVISION HISTORY
9/11—Rev. A to Rev. B
Document Title Changed from EVAL-AD9835EB to
UG-319.................................................................................Universal
Updated Format..................................................................Universal
Changes to Features Section............................................................ 1
Replaced Figure 1 ............................................................................. 1
Deleted Introduction Section and Operating the AD9835
Evaluation Board Section ................................................................ 1
Added Applications Section and General Description Section . 1
Deleted Link and Switch Options Section and Set-Up
Conditions Section ........................................................................... 2
Deleted Evaluation Board Interfacing Section, Sockets Section,
Connectors Section, and Switches Section.................................... 3
Replaced Software Description Section with Evaluation Board
Software Section ............................................................................... 3
Replaced Figure 2 ............................................................................. 3
Select External MCLK Frequency...............................................5
Select Frequency and Phase Registers ........................................6
Loading Frequency and Phase Registers....................................6
Power Options ...............................................................................6
Initialize, Reset, SYNC, Clear, and Sweep..................................6
Example of Operation...................................................................7
Evaluation Board Schematics and Layout......................................8
Ordering Information.................................................................... 11
Bill of Materials........................................................................... 11
Deleted Table 2, Table 3, and Table 4; Renumbered
Sequentially ........................................................................................3
Added Figure 3; Renumbered Sequentially ...................................4
Changes to Table 1.............................................................................4
Changes to Figure 4...........................................................................5
Added Figure 5 and Figure 6............................................................5
Added Figure 7 to Figure 10 ............................................................6
Added Figure 11 and Figure 12 .......................................................7
Added Evaluation Board Schematics and Layout Section...........8
Changes to Figure 13.........................................................................8
Added Figure 14 ................................................................................9
Changes to Figure 15.........................................................................9
Changes to Figure 16 and Figure 17............................................. 10
Added Ordering Information Section......................................... 11
Changes to Table 2.......................................................................... 11
Rev. B | Page 2 of 12
Evaluation Board User Guide UG-319
EVALUATION BOARD SOFTWARE
INSTALLING THE SOFTWARE
The EVAL-AD9835SDZ 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. Install the software before connecting the SDP board to
the USB port of the PC.
2. Start the Windows operating system and insert the
EVAL-AD9835SDZ evaluation kit CD.
3. Download the EVAL-AD9835SDZ LabVIEW™ software.
The correct driver for the SDP board, SDPDriversNET,
should download automatically after LabVIEW is
downloaded, supporting both 32-bit 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 SDPDriverNet Version 1.3.6.0.
4. After installation of the software and drivers is complete,
plug the EVAL-AD9835SDZ into the SDP board and the
SDP board into the PC using the USB cable included in
the kit.
5. When the software detects the evaluation board, proceed
through any dialog boxes that appear to finalize the
installation (for example, Found New Hardware Wizard
and Install the Software Automatically).
10177-002
Figure 2. Hardware Device Manager Window with SDP Board Plugged In
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UG-319 Evaluation Board User Guide
RUNNING THE SOFTWARE
To run the evaluation board program, do the following:
1. Click Start/All Programs/Analog Devices/AD9835/
AD9835 Eval Board.
2. 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.
3. Ensure that all links are in their correct locations (see Ta ble 1).
The main window of the AD9835 evaluation software then
opens, as shown in Figure 4.
Table 1. Default Setup for Link Positions
Link No. Position Function
LK1 Connected
LK3 B
LK5 B
LK6 A
REFOUT is used as the reference to the
DAC by connecting REFOUT to REFIN.
3.3 V digital supply for the AD9835
supplied from the EVAL-SDP-CB1Z
board.
3.3 V analog supply for the AD9835
supplied from the EVAL-SDP-CB1Z
board.
On-board linear regulator selected to
supply power to the general oscillator.
Figure 3. Pop-Up Window Error
10177-003
Rev. B | Page 4 of 12
Evaluation Board User Guide UG-319
Figure 4. AD9835 Evaluation Board Software
SETTING UP THE DIGITAL INTERFACE
The first step in setting up the AD9835 to take measurements is
to set the DIGITAL INTERFACE in the software window (see
Figure 4).
SYNC
The SPI Frame Frequency (
box can also be set in this window. If the SPI interface speed has
not been decided upon, leave the default values as shown in
. Figure 5
Figure 5. Digital Interface
) box and SCLK Frequency
10177-005
10177-004
SELECT EXTERNAL MCLK FREQUENCY
Having selected the digital interface specifics, next use the
EXTERNAL MCLK box to select the frequency to use. The
boards are supplied with a 50 MHz general oscillator. If a different
clock source is required, the CLK SMB connector can be used to
supply a different MCLK value.
The general oscillator includes the AEL301 oscillators from
AEL Crystals.
10177-006
Figure 6. EXTERNAL MCLK Input
Rev. B | Page 5 of 12
UG-319 Evaluation Board User Guide
SELECT FREQUENCY AND PHASE REGISTERS
Frequency and phase registers can be selected using either
software or hardware. Figure 7 shows how to select the source
of control for the registers. To control the frequency and phase
registers using the hardware pins, use SELSRC = 0. To control
the frequency and phase registers using the software bits, use
SELSRC = 1.
10177-007
Figure 7. Selection Method
LOADING FREQUENCY AND PHASE REGISTERS
The desired output frequency and output phase can be loaded
using the inputs shown in Figure 8. Either the FREQ0 register
or the FREQ1 register can be loaded with frequency data. The
frequency data is loaded in megahertz, and the equivalent
hexadecimal code is shown to the right after data is entered. After
data is loaded, the output appears on the IOUT pin. Similarly, the
PHASE0 register, the PHASE1 register, the PHASE2 register, or
the PHASE3 register can be selected, and the phase data is
loaded in degrees.
POWER OPTIONS
When Sleep is selected, the sleep bit is set to1. When this bit
equals 1, the AD9835 is powered down, internal clocks are
disabled, and the current sources and REFOUT of the DAC
are turned off.
When Normal is selected, the sleep bit is set to 0 and the
AD9835 is powered up.
10177-009
Figure 9. Power Options
INITIALIZE, RESET, SYNC, CLEAR, AND SWEEP
The initialize, reset, SYNC, and clear commands are set using the
buttons shown in Figure 10. To set up a DDS sweep, click Sweep.
The analog output frequency from the AD9835 is defined by
f
/232 × FREQ
MCLK
where FREQ is the value loaded into the selected frequency
register in decimals. This signal is phase shifted by
2π/4096 × PHASEx
where PHASEx is the value contained in the selected phase
register in decimals.
Figure 10. Commands
10177-010
Figure 8. Frequency and Phase Load
10177-008
Rev. B | Page 6 of 12
Evaluation Board User Guide UG-319
Initialise sets the frequency registers and the phase registers to
the values chosen by users. It also sets SELSRC to 0. It is used in
three different cases: when starting the program, after using
reset, and after switching from sleep to normal.
When the reset bit = 1, the phase accumulator is set to zero
phase, which corresponds to an analog output of midscale. Setting reset to 1 sets the FSELECT, PSEL0, and PSEL1 pins to 0.
Selection of the frequency/phase registers using the FSELECT
and PSELx pins is synchronized with the MCLK rising edge
when SYNC = 1. When SYNC = 0, the loading of the data and
the sampling of FSELECT and PSELx occurs asynchronously.
When CLR = 1, SYNC and SELSRC are set to zero so that the
pins are the default source. CLR resets to zero automatically.
The sweep function allows users to load a start frequency, stop
frequency, increment size, number of loops, and delay between
each frequency increment. These commands are then loaded to
the part automatically from the EVAL-SDP-CB1Z board. When
using the sweep function, SELSRC must be set to 1.
EXAMPLE OF OPERATION
An example of configuring the AD9835 to output 1 MHz
follows:
1. Plug the EVAL-SDP-CB1Z board into the EVAL-
AD9835SDZ board and connect to the USB port.
2. Start up the software located at Start/All Programs/
Analog Devices/AD9835/AD9835 Eval Board. Users
should see the SDP board communicating with the PC.
3. Define MCLK; the default is an on-board 50 MHz
oscillator.
4. Ensure that all links are in the correct locations (see Tab le 1).
5. Select the FREQ1 register.
6. Load a 1 MHz excitation frequency and press the
ENTER key.
The output should appear on the IOUT output on the
evaluation board.
For the FREQ0 register,
1. Select the FREQ0 register, and load the FREQ0 register
with 2 MHz.
2. Press the ENTER key.
For the FREQ1 register,
1. Select the FREQ1 register to load the 1 MHz associated
with this register.
2. Press the ENTER key.
Figure 11. Sweep Functionality
10177-011
2
CH1 FREQUENCY: 1.000MHz
CH1 PEAK TO PEAK: 572mV
CH2 100mV100mV M 200ns
Figure 12. 1 MHz Output Signal on the IOUT Test Point
T
0.00000s
A CH1 216mVCH1
10177-012
Rev. B | Page 7 of 12
UG-319 Evaluation Board User Guide
EVALUATION BOARD SCHEMATICS AND LAYOUT
10177-013
Figure 13. AD9835 Schematic Part A
Rev. B | Page 8 of 12
Evaluation Board User Guide UG-319
Figure 14. AD9835 Schematic Part B
10177-014
10177-015
Figure 15. Component Side View Layer 1
Rev. B | Page 9 of 12
UG-319 Evaluation Board User Guide
10177-016
Figure 16. Component Side View Silkscreen
Figure 17. Component Side View Layer 2, Solder Side
10177-017
Rev. B | Page 10 of 12
Evaluation Board User Guide UG-319
ORDERING INFORMATION
BILL OF MATERIALS
Table 2.
Reference Designator Description Manufacturer Part Number
C1, C3, C5, C6, C111, C12, C131 0.1 μF, ±10%, 50 V, X7R, ceramic capacitor Murata GRM188R71H104KA93D
C7 0.01 μF, ±10%, 10 V, 0603, X5R, capacitor Kemet C0603C103K5RACTU
C2, C4 10 μF, ±10%,10 V, SMD tantalum capacitor AVX TAJA106K010R
C8,C9 1 μF, ±10%,10 V,Y5V, 0603, ceramic capacitor Yageo CC0603ZRY5V6BB105
C10 0.1 μF, ±10%, 16 V, X7R, 0603, capacitor Multicomp B0603R104KCT
CLK1, FSEL1, IOUT, PSEL11, REFIN,
1
PSEL0
FSYNC, IOUT, MCLK, SCLK,
SDATA
G2 Copper short Not applicable Not applicable
J1 120-way connector, 0.6 mm pitch receptacle HRS (Hirose) FX8-120S-SV(21)
J2, J3 2-pin terminal block (5 mm pitch) Campden CTB5000/2
LK3, LK5, LK6 3-pin SIL header and shorting link Harwin M20-9990345 and M7567-05
LK1 2-pin SIL header and shorting link Harwin M20-9990246
R71, R81, R91 10 kΩ, ±1%, 0603, SMD resistor Multicomp MC 0.063W 0603 10K
R121 50 Ω, ±1%, 0603, SMD resistor Multicomp MC 0.063W 0603 50r
R14 3.9 kΩ, ±1%, SMD resistor Multicomp MC 0.063W 0603 6K8
R15 300 Ω, ±1%, SMD resistor Multicomp MC 0.063W 0603 200r
R17, R18 100 kΩ, ±1%, SMD resistor Multicomp MC 0.063W 0603 1% 100K
R1, R21, R3, R41, R61, R5, R111,
R10, R16
2
R13 330 kΩ, ±5%, SMD resistor Multicomp MC 0.063W 0603 330KR
U4 200 mW power 5 V, 50 MHz complete DDS Analog Devices AD9835BRUZ
U1 32k I2C serial EEPROM 8-lead MSOP Micro Chip 24LC32A-I/MS
U5 3.3 V linear regulator Analog Devices ADP3301ARZ-3.3
Y2 50 MHz, 3 mm × 2 mm SMD clock oscillator AEL Crystals AEL301series
1
Do not install.
2
DNP.
Straight PCB mount SMB jack, 50 Ω Tyco 1-1337482-0
Red test point Vero 20-313137
0 Ω, ±1%, 0603, SMD resistor Multicomp MC 0.063W 0603 0r
Rev. B | Page 11 of 12
UG-319 Evaluation Board User Guide
NOTES
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions
set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you
have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc.
(“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal,
temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided
for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional
limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term
“Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including
ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may
not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to
promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any
occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board.
Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice
to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO
WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED
TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL
PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF
THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE
AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable
United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of
Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby
submits to the pers onal jurisdiction and venu e of such courts. The United Nations Conventi on on Contracts for the Internation al Sale of Goods shall not apply to this Agreement and is expressly disclaimed.
©2011 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
UG10177-0-9/11(B)
Rev. B | Page 12 of 12
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