EVAL-AD9835SDZ

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 GENERAL DESCRIPTION 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 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. APPLICATIONS DDS tuning Digital demodulation 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. FUNCTIONAL BLOCK DIAGRAM MCLK XO ADP3301 EVAL-SDP-CB1Z MCLK PSEL0 GPIO PSEL1 AD9835 IOUT FSELECT FSYNC SCLK SDATA USB 10177-001 SPI Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. B | Page 1 of 12 UG-319 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1  Select External MCLK Frequency...............................................5  Applications....................................................................................... 1  Select Frequency and Phase Registers ........................................6  General Description ......................................................................... 1  Loading Frequency and Phase Registers....................................6  Functional Block Diagram .............................................................. 1  Power Options ...............................................................................6  Revision History ............................................................................... 2  Initialize, Reset, SYNC, Clear, and Sweep..................................6  Evaluation Board Software .............................................................. 3  Example of Operation...................................................................7  Installing the Software ................................................................. 3  Evaluation Board Schematics and Layout......................................8  Running the Software .................................................................. 4  Ordering Information.................................................................... 11  Setting up the Digital Interface................................................... 5  Bill of Materials........................................................................... 11  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 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: 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-AD9835SDZ evaluation kit CD. Download the EVAL-AD9835SDZ LabVIEW™ software. The correct driver for the SDP board, SDPDriversNET, should download automatically after LabVIEW is 5. 10177-002 1. 4. 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. 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. 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). Figure 2. Hardware Device Manager Window with SDP Board Plugged In Rev. B | Page 3 of 12 UG-319 Evaluation Board User Guide RUNNING THE SOFTWARE Table 1. Default Setup for Link Positions To run the evaluation board program, do the following: Link No. LK1 Position Connected LK3 B LK5 B LK6 A 2. 3. Click Start/All Programs/Analog Devices/AD9835/ AD9835 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 AD9835 evaluation software then opens, as shown in Figure 4. 10177-003 1. Figure 3. Pop-Up Window Error Rev. B | Page 4 of 12 Function 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. UG-319 10177-004 Evaluation Board User Guide 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). 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 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 upon, leave the default values as shown in Figure 5. SELECT EXTERNAL MCLK FREQUENCY 10177-005 Figure 6. EXTERNAL MCLK Input Figure 5. Digital Interface Rev. B | Page 5 of 12 UG-319 Evaluation Board User Guide SELECT FREQUENCY AND PHASE REGISTERS POWER OPTIONS 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. 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. 10177-007 When Normal is selected, the sleep bit is set to 0 and the AD9835 is powered up. Figure 7. Selection Method 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. 10177-009 LOADING FREQUENCY AND PHASE REGISTERS 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 fMCLK/232 × FREQ where FREQ is the value loaded into the selected frequency register in decimals. This signal is phase shifted by 2π/4096 × PHASEx 10177-010 where PHASEx is the value contained in the selected phase register in decimals. 10177-008 Figure 10. Commands Figure 8. Frequency and Phase Load 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. An example of configuring the AD9835 to output 1 MHz follows: 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. 2. 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. EXAMPLE OF OPERATION 1. 3. 4. 5. 6. 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. Plug the EVAL-SDP-CB1Z board into the EVALAD9835SDZ board and connect to the USB port. 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. Define MCLK; the default is an on-board 50 MHz oscillator. Ensure that all links are in the correct locations (see Table 1). Select the FREQ1 register. 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. 2. Select the FREQ0 register, and load the FREQ0 register with 2 MHz. Press the ENTER key. For the FREQ1 register, 1. 10177-011 2. Select the FREQ1 register to load the 1 MHz associated with this register. Press the ENTER key. Figure 11. Sweep Functionality 2 CH1 100mV CH2 100mV M 200ns A CH1 T 0.00000s 216mV Figure 12. 1 MHz Output Signal on the IOUT Test Point Rev. B | Page 7 of 12 10177-012 CH1 FREQUENCY: 1.000MHz CH1 PEAK TO PEAK: 572mV 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 UG-319 10177-014 Evaluation Board User Guide 10177-015 Figure 14. AD9835 Schematic Part B Figure 15. Component Side View Layer 1 Rev. B | Page 9 of 12 Evaluation Board User Guide 10177-016 UG-319 10177-017 Figure 16. Component Side View Silkscreen Figure 17. Component Side View Layer 2, Solder Side Rev. B | Page 10 of 12 Evaluation Board User Guide UG-319 ORDERING INFORMATION BILL OF MATERIALS Table 2. Reference Designator C1, C3, C5, C6, C11 1 , C12, C131 C7 C2, C4 C8,C9 C10 CLK1, FSEL1, IOUT, PSEL11, REFIN, PSEL01 FSYNC, IOUT, MCLK, SCLK, SDATA G2 J1 J2, J3 LK3, LK5, LK6 LK1 R71, R81, R91 R121 R14 R15 R17, R18 R1, R21, R3, R41, R61, R5, R111, R10, R16 2 R13 U4 U1 U5 Y2 1 2 Description 0.1 μF, ±10%, 50 V, X7R, ceramic capacitor 0.01 μF, ±10%, 10 V, 0603, X5R, capacitor 10 μF, ±10%,10 V, SMD tantalum capacitor 1 μF, ±10%,10 V,Y5V, 0603, ceramic capacitor 0.1 μF, ±10%, 16 V, X7R, 0603, capacitor Straight PCB mount SMB jack, 50 Ω Manufacturer Murata Kemet AVX Yageo Multicomp Tyco Part Number GRM188R71H104KA93D C0603C103K5RACTU TAJA106K010R CC0603ZRY5V6BB105 B0603R104KCT 1-1337482-0 Red test point Vero 20-313137 Copper short 120-way connector, 0.6 mm pitch receptacle 2-pin terminal block (5 mm pitch) 3-pin SIL header and shorting link 2-pin SIL header and shorting link 10 kΩ, ±1%, 0603, SMD resistor 50 Ω, ±1%, 0603, SMD resistor 3.9 kΩ, ±1%, SMD resistor 300 Ω, ±1%, SMD resistor 100 kΩ, ±1%, SMD resistor 0 Ω, ±1%, 0603, SMD resistor Not applicable HRS (Hirose) Campden Harwin Harwin Multicomp Multicomp Multicomp Multicomp Multicomp Multicomp Not applicable FX8-120S-SV(21) CTB5000/2 M20-9990345 and M7567-05 M20-9990246 MC 0.063W 0603 10K MC 0.063W 0603 50r MC 0.063W 0603 6K8 MC 0.063W 0603 200r MC 0.063W 0603 1% 100K MC 0.063W 0603 0r 330 kΩ, ±5%, SMD resistor 200 mW power 5 V, 50 MHz complete DDS 32k I2C serial EEPROM 8-lead MSOP 3.3 V linear regulator 50 MHz, 3 mm × 2 mm SMD clock oscillator Multicomp Analog Devices Micro Chip Analog Devices AEL Crystals MC 0.063W 0603 330KR AD9835BRUZ 24LC32A-I/MS ADP3301ARZ-3.3 AEL301series Do not install. DNP. 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. 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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 personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International 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