EVAL-AD5676SDZ/ EVAL-AD5676RSDZ User Guide UG-814 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 AD5676/AD5676R Octal, 16-Bit nanoDAC+ FEATURES GENERAL DESCRIPTION Full featured evaluation board for the AD5676/AD5676R Various link options PC control in conjunction with the Analog Devices, Inc., EVAL-SDP-CB1Z system demonstration platform (SDP) This user guide details the operation of the evaluation boards for the AD5676/AD5676R octal channel, voltage output digitalto-analog converter (DAC). EVALUATION KIT CONTENTS EVAL-AD5676SDZ/EVAL-AD5676RSDZ evaluation board CD includes Self-installing evaluation software that allows users to control the board and exercise all functions of the device Electronic version of the EVAL-AD5676SDZ/ EVAL-AD5676RSDZ user guide ADDITIONAL EQUIPMENT AND SOFTWARE NEEDED EVAL-SDP-CB1Z SDP board, includes a USB cable PC running Windows XP SP2, Windows Vista, or Windows 7 with USB 2.0 port ONLINE RESOURCES Documents Needed AD5676/AD5676R data sheet EVAL-AD5676SDZ/EVAL-AD5676RSDZ user guide Required Software AD5676(R) evaluation software (download from the EVAL-AD5676SDZ/EVAL-AD5676RSDZ product pages) Design and Integration Files Schematics, layout files, bill of materials PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. The EVAL-AD5676SDZ/EVAL-AD5676RSDZ evaluation boards help users to quickly prototype new AD5676/AD5676R circuits and reduce design time. The AD5676/AD5676R operate from a single 2.7 V to 5.5 V supply. The AD5676R has an internal 2.5 V reference giving a maximum output voltage of 2.5 V or 5 V. The AD5676 does not have an internal reference; therefore, an ADR431 is provided on-board as a 2.5 V reference source. A different reference voltage can be applied via the EXT_REF SMB connector, if required. Full data on the AD5676/AD5676R are available in the respective product data sheets, available from Analog Devices, which should be consulted in conjunction with this user guide when using the evaluation boards. The evaluation boards interface to the USB port of a PC via the SDP board. Software is supplied with the evaluation board to allow the user to program the AD5676/AD5676R. The evaluation boards are compatible with the EVAL-SDP-CB1Z Blackfin® SDP controller board (SDP-B), which is available for order on the Analog Devices website at www.analog.com. Rev. 0 | Page 1 of 12 UG-814 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Power Supplies ...............................................................................5 Evaluation Kit Contents ................................................................... 1 Input Signals...................................................................................5 Additional Equipment and Software Needed................................... 1 Output Signals ...............................................................................5 Online Resources .............................................................................. 1 Link Configuration Options ............................................................6 General Description ......................................................................... 1 Setup Conditions ...........................................................................6 Revision History ............................................................................... 2 Evaluation Board Circuitry ..............................................................7 Typical Evaluation Setup ................................................................. 3 How to Use the Software ..................................................................8 Getting Started .................................................................................. 4 Starting the Software .....................................................................8 Installing the Software ................................................................. 4 Software Operation .......................................................................9 Evaluation Board Setup Procedures........................................... 4 Evaluation Board Schematics........................................................ 10 Evaluation Board Hardware ............................................................ 5 Bill of Materials ............................................................................... 12 REVISION HISTORY 3/15—Revision 0: Initial Version Rev. 0 | Page 2 of 12 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide UG-814 TYPICAL EVALUATION SETUP SDP BOARD AD5676R EVALUATION BOARD 0.250A 6V ±25V COM POWER SUPPLY CONNECTORS 12993-001 6.000V Figure 1. Rev. 0 | Page 3 of 12 UG-814 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide GETTING STARTED INSTALLING THE SOFTWARE 3. The evaluation kit for the AD5676/AD5676R includes selfinstalling software on the CD. The software is compatible with Windows® XP, Windows Vista (32-bit), and Windows 7 (32-bit and 64-bit). The software must be installed before connecting the SDP-B board to the USB port of the PC to ensure that the SDP-B board is recognized when it connects to the PC. To install the software, take the following steps: 1. 2. Start the Windows operating system and insert the CD. The installation software should open automatically. If it does not open automatically, run the setup.exe file from the CD. 4. 5. After installation is complete, power up the evaluation board as described in the Power Supplies section. Connect the evaluation board to the SDP-B board and connect the SDP-B board to 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. EVALUATION BOARD SETUP PROCEDURES To set up the evaluation board, take the following steps: 1. 2. Rev. 0 | Page 4 of 12 Connect the evaluation board to the SDP-B board and connect the USB cable between the SDP-B board and the PC. Power the SDP-B and evaluation boards by connecting 6 V dc to the J3 connector. EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide UG-814 EVALUATION BOARD HARDWARE POWER SUPPLIES INPUT SIGNALS To use the evaluation board with the SDP-B board, a 6 V dc power supply is required, which is connected to Connector J3. The evaluation board can be used without the SDP-B board. In this case, the J1 and J2 connectors are used as the power supply inputs. When the SDP-B board controls the evaluation board, the digital input signals are applied to Connector J4. When the SDP-B board is not used, apply the digital signal to Connector J5. All supplies are decoupled to ground with 10 µF tantalum and 0.1 µF ceramic capacitors. Voltage External, VLOGIC supply Analog power supply, VCC 6 V dc board positive power supply EXT_REF AGND EXT_VDD DGND VREF SPI INTERFACE 10-WAY HEADER VOUT0 VOUT1 AD5676/ AD5676R VOUT6 VOUT7 Figure 2. Evaluation Board Block Diagram Rev. 0 | Page 5 of 12 12993-002 Connector Number J1 J2 J3 ADR431 2.5V REF EEPROM SDP CONNECTOR Table 1. Power Supply Connectors EXT_VL The DAC output voltages are available on the SMB connectors, VOUT0 to VOUT7. +6V AGND Both AGND and DGND inputs are provided on the board. The AGND and DGND planes are connected at one location close to the AD5676/AD5676R. It is recommended that AGND and DGND not be connected elsewhere in the system to avoid ground loop problems. OUTPUT SIGNALS UG-814 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide LINK CONFIGURATION OPTIONS Multiple link (LKx) options must be set correctly to select the appropriate operating setup before using the evaluation board. The functions of these options are described in Table 2. board. The evaluation boards can be operated in SDP controlled mode to be used with the SDP-B board, or the evaluation board can be used in standalone mode. SETUP CONDITIONS The Default Position column of Table 2 shows the default positions in which the links are set when the evaluation board is packaged. When the board is shipped, it is set up to operate with the SDP-B board in SDP controlled mode. Before applying power and signals to the evaluation board, ensure that all link positions are as required by the operating mode. There are two modes in which to operate the evaluation Table 2. Link Functions Link No. LK1 LK2 LK3 LK4 LK5 1 Function This link selects the DAC analog voltage source. Position A selects the internal voltage source (INT_VCC) from the ADP3331 (U1). Position B selects an external supply voltage (EXT_ VCC). This link selects the DAC digital voltage source. Position A selects the digital voltage source from the SDP-B board (V_IO). Position B selects an external digital supply voltage (EXT_VLOGIC). This link selects the reference source. Position A selects the internal reference of the AD5676R as the reference source or an external reference source from the SMB connector EXT_REF. Use only Position A with the EVAL-AD5676RSDZ. Position B selects U6 as the 2.5 V reference source. Do not use Position B with the EVAL-AD5676RSDZ. This link selects the RSTSEL setting of the AD5676/AD5676R. Position A selects DAC power up to zero scale. Position B selects DAC power up to midscale. This link sets the internal gain setting of the AD5676/AD5676R. Position A selects software control of the gain via the SDP-B board. Position B selects a gain of 0 V to 2 × VREF. Position C selects a gain of 0 V to VREF. Position A is the default for the EVAL-AD5676RSDZ. Position B is the default for the EVAL-AD5676SDZ. Rev. 0 | Page 6 of 12 Default Position A A A/B 1 A A EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide UG-814 EVALUATION BOARD CIRCUITRY The EVAL-AD5676SDZ/EVAL-AD5676RSDZ evaluation boards allow the function and performance of the AD5676/ AD5676R to be easily tested. Each evaluation board contains two voltage regulators that generate the analog and digital power supplies and that also power the SDP-B board, if it is connected. The two regulators are powered via a 6 V supply attached to Connector J3. Alternatively, a separate analog supply can be attached via Connector J2, and an external VLOGIC supply can be connected to Connector J1. Control of the AD5676/AD5676R is typically performed by the SDP-B board, which is attached to Connector J4. The SDP-B board allows the software provided with the kit to be used to load register values, set the voltage of the DAC outputs, and write to the control register of the AD5676/AD5676R. When the SDP-B board is not required, the control signals can be applied to the AD5676/AD5676R by connecting them to the relevant pins on Connector J5. The DAC output voltages are available on the SMB connectors, VOUT0 to VOUT7. Rev. 0 | Page 7 of 12 UG-814 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide HOW TO USE THE SOFTWARE To run the program, take the following steps: 2. 3. Connect the evaluation board to the SDP-B board, and connect the USB cable between the SDP-B board and the PC. Power the SDP-B board and the evaluation board by connecting 6 V to Connector J3. Click Start > All Programs > Analog Devices > AD5676/AD5676R > AD5676/AD5676R Evaluation Software. While the software connects to the evaluation board, the message in Figure 3 displays. Figure 4. Connectivity Error 12993-003 1. If the SDP-B board is not connected to the USB port when the software is launched, a connectivity error displays (see Figure 4). Connect the evaluation board to the USB port of the PC, wait a few seconds, click Rescan, and follow the instructions. 12993-004 STARTING THE SOFTWARE Figure 3. Connection Message Alternatively, the software can be used without an evaluation board. The software runs in simulation mode displaying expected outputs based on the input data. The main window of the AD5676/AD5676R evaluation software then opens, as shown in Figure 5. Rev. 0 | Page 8 of 12 UG-814 12993-005 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide Figure 5. AD5676/AD5676R Evaluation Software Main Window SOFTWARE OPERATION LDAC Control The AD5676/AD5676R evaluation software allows the user to program values to the input and DAC registers of each DAC individually or collectively. Click Pulse LDAC to bring the LDAC pin low and then back high. Doing this copies the data from the input registers to the DAC registers, and the outputs update accordingly. Any DAC updates disabled by the LDAC mask settings are ignored. Write to Input Register Click Write to Input Register to load the code of the input data control to the input register of the selected DAC in the DAC Selection box. The LDAC pin can also be set high or low by selecting the appropriate radio button. Update DAC Register from Input Register Each of the DACs can be powered down individually. Each of the DACs has an associated selection box allowing the part to operate in normal mode or power-down mode. Click the blue progressive disclosure buttons to access the selection box. When the power-down setting for each DAC is selected, click Confirm to write the appropriate values to the AD5676/AD5676R. Click Update DAC Register from Input Register to copy the value in the input register to the corresponding DAC register. DAC outputs are automatically updated with the appropriate voltage. LDAC mask settings are ignored. Write to DAC Register Select Write to Input and DAC Register to load the code of the input data control to the input register and DAC register of the selected DAC. The DAC outputs are automatically updated with the appropriated voltage. LDAC mask settings are ignored. Gain Control Select GAIN ×1 to give a full-scale output of 2.5 V for the AD5676R or VREF for the AD5676. Select GAIN ×2 to give a full-scale output of 5 V for the AD5676R or 2 × VREF for the AD5676. Power-Down Control LDAC Mask Register Each of the DACs has an associated selection box allowing the part to be set to respond or ignore LDAC pulses. Click the blue progressive disclosure buttons to access the selection box. When the LDAC selections are completed, click Confirm to write the appropriate values to the AD5676/AD5676R. SPI Command The Full SPI Command box shows the value that must be written to the AD5676/AD5676R to replicate the function of the evaluation board. Rev. 0 | Page 9 of 12 UG-814 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide EVALUATION BOARD SCHEMATICS 12993-006 Figure 6. EVAL-AD5676SDZ/EVAL-AD5676RSDZ Schematic, Page 1 of 2 Rev. 0 | Page 10 of 12 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide UG-814 12993-007 Figure 7. EVAL-AD5676SDZ/EVAL-AD5676RSDZ Schematic, Page 2 of 2 Rev. 0 | Page 11 of 12 UG-814 EVAL-AD5676SDZ/EVAL-AD5676RSDZ User Guide BILL OF MATERIALS Table 3. Qty 7 7 1 17 Description Capacitor, Case A, 10 µF, 10 V Capacitor, 100 nF, 50 V, 0603 Capacitor, 1 µF, 10 V, 0603 Do not populate Supplier/Part Number 1 FEC 197-130 FEC 8820023 FEC 318-8840 Not inserted 3 1 1 1 3 1 1 1 1 1 1 4 2 9 1 1 1 1 1 Reference Designator C1, C3, C5, C7 to C9, C16 C2, C4, C6, C10 to C12, C15 C14 C13, C17 to C19, C24 to C27, R5 to R7, R10, R12 to R16 J1 to J3 J4 J5 L1 LK1 to LK3 LK4 LK5 R1 R2 R3 R4 R8, R9, R19, R20 R17, R18 TP1 to TP9 U1 U2 U3 U6 U8 2-pin terminal block 120-way female connector 10-pin (2x5), 0.1" header Ferrite bead, 600 Ω at 100 MHz Jumper block using 3-pin SIP header 2-way link option 3-way link option Resistor, 1 MΩ, 0.063 W, 1%, 0603 Resistor, 300 kΩ, 0.1 W, 1%, 0603 Resistor, 1.5 Ω, 0.063 W, 5%, 0603 Resistor, 0 Ω, 0805 10 kΩ, SMD, resistor 100 kΩ, SMD, resistor Red test point Adjustable LDO regulator 32k I2C serial EEPROM +5 V, fixed, adjustable voltage regulator Ultralow noise XFET voltage reference Octal,16-bit nanoDAC+ 9 VOUT0 to VOUT7, EXT_REF Straight PCB mount SMB jack, 50 Ω FEC 151789 FEC 1324660 or Digikey H1219-ND FEC 1022244 (36 Pin Strip) Digikey 490-1024-1-ND FEC 1022248 and 150410 FEC 1022244 FEC 9331662 Digikey RMCF1/161MFRCT-ND Digikey 541-300KHCT-ND FEC 9331832 FEC 9333681 FEC 933-0399 FEC 9330402 FEC 8731144 (Pack) Analog Devices ADP3331ARTZ FEC 1331330 Analog Devices ADP3367ARZ Analog Devices ADR431BRZ Analog Devices AD5676RARUZ or AD5676ARUZ FEC 1206013 1 FEC is Farnell Electronics Components. 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 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. ©2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG12993-0-3/15(0) Rev. 0 | Page 12 of 12