Evaluation Board User Guide UG-459 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 Evaluation Board for AD5686R/AD5686/AD5684R/AD5684 16-/12-Bit, Quad Channel Voltage Output DAC FEATURES The AD568x(R) is used in this user guide to refer to the AD5686R, AD5686, AD5684R, and AD5684. Full-featured evaluation board for the AD5686R, AD5686, AD5684R, and AD5684 On-board references Various link options PC control in conjunction with Analog Devices, Inc., System Demonstration Platform (SDP) The evaluation board is designed to help customers quickly prototype new AD568x(R) circuits and reduce design time. The AD568x(R) operates from a single 2.7 V to 5.5 V supply. The AD5686R and AD5684R incorporate an internal 2.5 V reference to give an output voltage span of 2.5 V or 5 V. The AD5686 and AD5684 require an external reference. PACKAGE CONTENTS Full data on the AD568x(R) can be found in the appropriate data sheet available from Analog Devices and should be consulted in conjunction with this user guide when using the evaluation board. AD5686/AD5686R or AD5684/AD5684R evaluation board CD includes Self-installing software that allows users to control the board and exercise all functions of the device Electronic version of the AD5686R, AD5686, AD5684R, and AD5684 data sheets Electronic version of UG-459 The evaluation board interfaces 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 AD568x(R). This evaluation board requires the EVAL-SDP-CB1Z board (SDP-B controller board), which is available for order on the Analog Devices website at www.analog.com. GENERAL DESCRIPTION This user guide details the operation of the evaluation board for the AD5686R, AD5686, AD5684R, and AD5684 quad channel, voltage output digital-to-analog converters (DACs). The EVAL-AD5686RSDZ supports both the AD5686R and AD5686, and the EVAL-AD5684RSDZ supports both the AD5684R and AD5684. EXT_REF AGND VDD VLOGIC DGND DGND +6V EVALUATION BOARD BLOCK DIAGRAM 3V REF EEPROM VREF SPI VOU TA AD5686 AD5684 VOUTC VREF VOUTA1 10 WAY HEADER SPI AD5686R AD5684R VOUTB VOUTD VOUTB1 VOUTC1 VOUTD1 Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 12 10954-001 SDP CONNECTOR 5V REF UG-459 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Evaluation Board Software ...............................................................4 Package Contents .............................................................................. 1 Installing the Software ..................................................................4 General Description ......................................................................... 1 Running the Software ...................................................................4 Evaluation Board Block Diagram ................................................... 1 Software Operation .......................................................................5 Revision History ............................................................................... 2 SPI Command................................................................................5 Evaluation Board Hardware ............................................................ 3 Evaluation Board Schematics and Artwork ...................................6 Power Supplies .............................................................................. 3 Ordering Information .................................................................... 10 Link Options ................................................................................. 3 Components List ........................................................................ 10 REVISION HISTORY 9/12—Revision 0: Initial Version Rev. 0 | Page 2 of 12 Evaluation Board User Guide UG-459 EVALUATION BOARD HARDWARE POWER SUPPLIES LINK OPTIONS To use the evaluation board with the SDP board, a 6 V power supply is required, which is connected to Connector J3. The evaluation board can be used without the SDP board. In this case, the J1 and J2 connectors are used as the power supply inputs. A number of link options are incorporated in the evaluation board and must be set for the required operating conditions before using the board. The functions of these link options are described in detail in Table 3. Table 2 lists the positions of the different links controlled by PC, via the USB port, and the SDP board in single-supply mode is required. Both AGND and DGND inputs are provided on the board. The AGND and DGND planes are connected at one location close to the AD568x(R). It is recommended that AGND and DGND not be connected elsewhere in the system to avoid ground loop problems. All supplies are decoupled to ground with 10 µF tantalum and 0.1 µF ceramic capacitors. Table 1. Power Supply Connectors Connector Number J1 J2 J3 Voltage External, VLOGIC supply Analog power supply, VDD 6 V board positive power supply Table 2. Link Options Setup for SDP Control (Default) Link Number LK1 LK2 LK3 LK4 LK5 LK6 Option A A C B A B Table 3. Link Functions Link Number LK1 LK2 LK3 LK4 LK5 LK6 Option This link selects the DAC analog voltage source. Position A selects the internal voltage source (INT_VDD) from the ADP3331. Position B selects an external supply voltage (EXT_VDD). This link selects the DAC digital voltage source. Position A selects the digital voltage source from the SDP board (V_IO). Position B selects an external digital supply voltage (EXT_VLOGIC). This link selects the reference source. Position A selects the on-board 2.5 V reference as the reference source. Do not use this option with the AD5686R/AD5684R. Position B selects the on-board 5 V reference as the reference source. Do not use this option with the AD5686R/AD5684R. Position C selects the internal reference of the AD5686R/AD5684R as the reference source for the AD5686/AD5684. Position D selects an off board voltage reference via the EXT_REF connector. This link selects the gain setting of the AD5686/AD5684 (not populated). Position A selects gain of 2. Position B selects gain of 1. This link selects the gain setting of the AD5686R/AD5684R. Position A selects gain of 2. Position B selects gain of 1. This link selects whether the AD5686R/AD5684R or AD5686/AD5684 is accessed by the software. Position A selects the AD5686/AD5684. Position B selects the AD5686R/AD5684R. Rev. 0 | Page 3 of 12 UG-459 Evaluation Board User Guide EVALUATION BOARD SOFTWARE INSTALLING THE SOFTWARE 3. The evaluation kit for the AD568x(R) includes self-installing software on the CD. The software is compatible with Windows® XP, Windows Vista (32-bit) and Windows 7 (32-bit). If users need drivers for 64-bit operating systems, contact [email protected]. Click Start > All Programs > Analog Devices > AD56x(R). Each of the AD5686R, AD5686, AD5684R, and AD5684 has its own version of software. Click the appropriate one to run the software. As the software connects to the evaluation board, the message in Figure 2 displays. 10954-002 The software must be installed before connecting the SDP board to the USB port of the PC to ensure that the SDP board is recognized when it connects to the PC. To install the software, take the following steps: 1. 2. 3. 4. 5. 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. After installation is completed, power up the evaluation board as described in the Power Supplies section. Connect the evaluation board to 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. Figure 2. Connection Message 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. RUNNING THE SOFTWARE 1. 2. Connect the evaluation board to the SDP board and connected the USB cable between the SDP board and the PC. Power the SDP and evaluation board by connecting 6 V to the J3 connector. Rev. 0 | Page 4 of 12 10954-003 To run the program, do the following: Figure 3. Connectivity Error 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 AD568x(R) evaluation software then opens, as shown in Figure 4. UG-459 10954-004 Evaluation Board User Guide Figure 4. AD568x(R) Evaluation Board Software Main Window GAIN Control SOFTWARE OPERATION The software for the AD568x(R) allows the user to program values to the input and DAC registers of each DAC individually or collectively. The logic level of the GAIN pin is set externally by LK4 or LK5. To display the correct voltage, the gain selection must be set to match the level of the pin. Write to Input Register Reference Control Select Write to Input Register to load the value in the input data control to the input register of any DACs selected in the Select DACs to Use box. The AD5686R and AD5684R have an on-chip reference that can be disabled to reduce power consumption. The AD5686R and AD5684R software has a control that allows this function to be used. Write to DAC Register Select Write to DAC Register to load the value in the input data control to the DAC register of any DACs selected in the Select DACs to Use box. The DAC outputs are automatically updated with the appropriated voltage. The AD5686 and AD5684 require an external reference. The software for the AD5686 and AD5684 has a control that allows the user to set the reference voltage. 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, powered down with either a 1 kΩ or a 100 kΩ resistor to ground or tristate. When the power-down setting for each DAC are selected, click Write to Part to write the appropriate values to the AD568x(R). Select Update DAC Register from Input Register to copy the value in a DAC input register to the corresponding DAC register. DAC outputs are automatically updated with the appropriated voltage. LDAC CONTROL Select Pulse LDAC to bring the LDAC pin low and then back high. Do 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. The LDAC pin can also be set high or low by clicking the appropriate radio button. Power-Down Control LDAC Mask Register Each of the DACs can be set to accept or ignore LDAC pulses. When the LDAC selections are completed, click Write to Part to write the appropriate values to the AD568x(R). SPI COMMAND On both control tabs of the software, the SPI commands sent to the DAC display. This shows what must be written to the AD568x(R) to replicate the function of the evaluation board. Rev. 0 | Page 5 of 12 UG-459 Evaluation Board User Guide EVALUATION BOARD SCHEMATICS AND ARTWORK 10954-005 Figure 5. AD568x(R) Schematic (Page 1 of 2) Rev. 0 | Page 6 of 12 Evaluation Board User Guide UG-459 10954-006 Figure 6. AD568x(R) Schematic (Page 2 of 2) Rev. 0 | Page 7 of 12 Evaluation Board User Guide 10954-007 UG-459 10954-008 Figure 7. AD568x(R) Component Silkscreen Figure 8. AD568x(R) Top Side Routing Rev. 0 | Page 8 of 12 UG-459 10954-009 Evaluation Board User Guide Figure 9. AD568x(R) Bottom Side Routing Rev. 0 | Page 9 of 12 UG-459 Evaluation Board User Guide ORDERING INFORMATION COMPONENTS LIST Table 4. Qty 1 1 Reference Designator U7 U5 1 1 U1 U3 1 U6 1 U4 8 VOUTA,VOUTA1, VOUTB, VOUTB2, VOUTC, VOUTC1, VOUTD, VOUTD1 L1 R1 R2 J4 U2 1 1 1 1 1 1 1 2 2 2 3 3 4 8 9 10 17 C14 R3 R8, R9 R17, R18 R4, R11 J5, LK3, LK6 J1, J2, J3 LK1, LK2, LK4, LK5 C1, C3, C5, C7, C8, C9, C16, C20 TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9 C2, C4, C6, C10, C11, C12, C15, C21, C22, C23 C13, C17, C18, C19, C24, C25, C26, C27, R5, R6, R7, R10, R12, R13, R14, R15, R16 Description Quad, 16-bit/12-bit nanoDAC+ with SPI interface Quad, 16-bit/12-bit nanoDAC+ with 2 ppm/°C on-chip reference and SPI interface High accuracy, ultralow quiescent current LDO, SOT-23 5 V fixed, adjustable low dropout linear voltage regulator Ultralow noise XFET 2.5 V voltage reference with current sink and source capability Ultralow noise XFET 5.0 V voltage reference with current sink and source capability 50 Ω SMB jack Supplier/Part Number Analog Devices AD5686/AD5684 Analog Devices AD5686R/AD5684R Ferrite bead, 600 Ω at 100 MHz 0603, 300 kΩ resistor Resistor, 1 MΩ, 1%, 0.063W, 0603 120-pin female connector 32K, I2C serial EEPROM (24LC32) Digi-Key 490-1024-1-ND Digi-Key 541-300KHCT-ND Digi-Key RMCF1/161MFRCT-ND FEC 1324660 or Digi-Key H1219-ND FEC 1331330 Capacitor, 0603, 1 µF, 10 V Resistor, 1.5 Ω, 5%, 0.063W, 0603 10 kΩ SMD resistor 100 kΩ SMD resistor 0 Ω resistor, 0805 Terminal block, 8-pin (4 × 2) 0.1" header 2-pin terminal block Jumper block using 3-pin SIP header Case A, 10 µF capacitor Red test point Capacitor, 0.1 µF, 50 V, 0603 Do not populate (DNP) FEC 318-8840 FEC 9331832 FEC 9330399 FEC 9330402 FEC 9333681 FEC 1022244 FEC 151789 FEC 1022248 and FEC 150410 FEC 197-130 FEC 8731144 (pack) FEC 8820023 Not Inserted Rev. 0 | Page 10 of 12 Analog Devices ADP3331 Analog Devices ADP3367 Analog Devices ADR431 Analog Devices ADR435 FEC 1206013 Evaluation Board User Guide UG-459 NOTES Rev. 0 | Page 11 of 12 UG-459 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. 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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. ©2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG10954-0-9/12(0) Rev. 0 | Page 12 of 12