Evaluation Board for Quad, 16-Bit, Serial Input, Voltage Output DAC EVAL-AD5664REB FEATURES The on-chip reference is off at power-up allowing for the use of an external reference. The REF195 is used on this evaluation board. The part must be written to after power-up to turn on the internal reference. Full featured evaluation board for the AD5664R Allows evaluation of the AD5664 part On-board reference On-board ADC for voltage readback Various link options Direct hook up to USB port of PC PC software for control of DACs Refer to the AD5664R data sheet available for full data on the part. Consult the AD5664R data sheet in conjunction with this data sheet when using the evaluation board. This board can also be used to evaluate the AD5664 part. Refer to the AD5664 data sheet for complete data on the part. GENERAL DESCRIPTION This data sheet describes the evaluation board for the AD5664R quad, 16-bit DAC. The AD5664R operates from a single 2.7 V to 5.5 V supply. The part incorporates an internal 1.25 V or 2.5 V on-chip reference to give an output voltage span of 2.5 V or 5 V, respectively. The evaluation board interfaces to the USB port of an IBM®compatible PC. Software is available with the evaluation board that allows the user to easily program the AD5664R. FUNCTIONAL BLOCK DIAGRAM POWER SUPPLY INPUTS EXT REF IN/ INT REF OUT 5V VOLTAGE REFERENCE USB CONNECTOR SMB CONNECTORS VREFIN/VREFOUT VOUTA VOUTB CONTROLLER I/O AD5664R ADG738 8:1 MUX ADC CY7C68013 06087-001 VOUTD NOTES 1. ADDITIONAL PINS OMITTED CLARITY. Figure 1. Rev. 0 Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards as supplied “as is” and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under any patents or other intellectual property by application or use of evaluation boards. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Analog Devices reserves the right to change devices or specifications at any time without notice. Trademarks and registered trademarks are the property of their respective owners. Evaluation boards are not authorized to be used in life support devices or systems. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. EVAL-AD5664REB TABLE OF CONTENTS Features .............................................................................................. 1 Software Installation and Startup................................................4 General Description ......................................................................... 1 Software Operation .......................................................................4 Functional Block Diagram .............................................................. 1 Reference Setup .............................................................................4 Revision History ............................................................................... 2 Schematics ..........................................................................................6 Evaluation Board Hardware ............................................................ 3 Ordering Information.................................................................... 10 Power Supplies .............................................................................. 3 Component Listing .................................................................... 10 Link Options ................................................................................. 3 Ordering Guide .......................................................................... 10 Evaluation Board Software .............................................................. 4 ESD Caution................................................................................ 10 REVISION HISTORY 9/06—Revision 0: Initial Version Rev. 0 | Page 2 of 12 EVAL-AD5664REB EVALUATION BOARD HARDWARE POWER SUPPLIES LINK OPTIONS To power the AD5664R evaluation board, supply 5.5 V between the AVDD and AGND inputs for the analog supply of the AD5664R (J6). Alternatively place Link 6 in Position B, powering the analog circuitry from the USB port (default setting). A number of link and switch options on the evaluation board should be set for the required operating setup before using the board. The functions of these link options are described in detail in Table 2. The default setup is for control by the PC via the USB port. The default link options are listed in Table 1. Both AGND and DGND inputs are provided on the board. The AGND and DGND planes are connected at one location close to the AD5664R. To avoid ground loop problems, it is recommended that the user does not connect AGND and DGND elsewhere in the system. Each supply is decoupled to the relevant ground plane with 10 μF and 0.1 μF capacitors. Each device supply pin is also decoupled with a 10 μF and 0.1 μF capacitor pair to the relevant ground plane. Table 1. Link Options Setup for PC Control (Default) Link No. LK1 to LK4 LK5 LK6 LK7 LK8 LK9 LK10 LK11 LK12 LK13 Option Inserted B B A A B Removed B Not applicable A Table 2. Link Options Link No. LK1 to LK4 LK5 LK6 LK7 LK8 LK9 LK10 LK11 LK12 LK13 Function This link connects the VOUTA pin to the VOUTD pin of the AD5664R to the input pins of the ADG738 demultiplexer so that the DAC output value can be monitored using the on-board AD7476 ADC. This link selects the AVDD power supply source for the analog circuitry. • Position A selects J6 as the AVDD analog circuitry power supply source. • Position B selects the 5 V power supply source as the AVDD analog circuitry power supply source (see LK6). This link selects the 5 V power supply source for the digital circuitry. • Position B selects the USB port as the 5 V digital circuitry power supply source. • Position A selects J7 as the 5 V digital circuitry power supply source. This link selects whether the AD5664R evaluation board is controlled by the PC via the USB port or by an external source via the SMB connectors J1to J5. • Position A selects control by the PC via the USB port. • Position B selects control by an external source via the SMB connectors J1 to J3. This link sets the RESET pin on the ADG738. • Position A allows normal operation of the switch. • Position B resets the switch. This link selects the AVDD power supply source for the REF195. • Position A selects J6 as the REF195 power supply source. • Position B selects the AVDD as the REF195 power supply source (see LK5). This link connects a 0.1 μF capacitor to AGND on the VREFOUT pin. It is recommended to connect this when using the internal reference. This link selects the reference source. • Position A selects the internal reference as the reference source. The part must be written to via software to turn on the internal reference. • Position B selects the on-board REF195 5 V reference as the reference source. Not applicable. This link selects the DAC voltage source. • Position A selects the AVDD analog circuitry power supply source. • Position B selects the on-board REF195 5 V reference as the power supply source. Rev. 0 | Page 3 of 12 EVAL-AD5664REB EVALUATION BOARD SOFTWARE SOFTWARE INSTALLATION AND STARTUP The AD5664R evaluation board kit includes self-installing software CD. The software is compatible with Windows® 2000 and Windows XP. If the setup file does not run automatically when you insert the CD, run the setup.exe file directly from the CD-ROM drive. Install the software before connecting the evaluation board to the PC’s USB port to ensure that the evaluation board is correctly recognized when connected to the PC. To select a command with which to program the part, click the appropriate button under Command Bits. For example, to program all DAC outputs with full scale: 1. Under Command Bits, click Write to and Update DAC channel n. 2. Under Address Bits, click All DACs. 3. Under Data Bits, either type the data in hex format or in voltage. 4. Click Write to Part to execute all writes to the part. After the installation has completed power up the AD5664R evaluation board as described in the Power Supplies section. Then, connect it to the PC’s USB port using the supplied cable. The voltage output on each DAC channel is monitored using the on-board ADC. To read the output voltage click Sample under the ADC section in the upper right of the window. Once the software detects the evaluation board, proceed through any dialog boxes that appear to finalize the installation. The AD5664R evaluation board lets you program the power down DAC bits, the clear code register bits, and the LDAC register bits by clicking on the corresponding button under the Command Bits sections and clicking Write to Part. You can also program the register bits for the required mode of operation. Refer to the AD5664R data sheet for further information. SOFTWARE OPERATION From the Analog Devices menu, click Start > All Programs > Analog Devices >AD5664R >AD5664R Evaluation Software. REFERENCE SETUP For older PCs, click Start > Programs > Analog Devices >AD5664R >AD5664R Evaluation Software. The AD5664R Evaluation Software dialog box opens, as shown in Figure 2. The data programmed into the 24-bit input shift register is displayed. You can select the command bits, the address bits, and the data bits by clicking the appropriate button under each area. The AD5664R internal reference is off at power-up by default, allowing the use of an external reference. To turn on (or off) the internal reference click REF Setup Register under Command Bits. This allows the user to program the bit in the reference setup register for the required mode of operation. as shown in Figure 3. Then click Write to Part. Rev. 0 | Page 4 of 12 06087-002 EVAL-AD5664REB 06087-003 Figure 2. AD5664R Dialog Box Figure 3. AD5664R Dialog Box, Reference Setup Rev. 0 | Page 5 of 12 EVAL-AD5664REB 06087-004 SCHEMATICS Figure 4. Schematic of Controller Circuitry Rev. 0 | Page 6 of 12 06087-005 EVAL-AD5664REB Figure 5. Schematic of AD5664R Circuitry Rev. 0 | Page 7 of 12 06087-006 EVAL-AD5664REB 06087-007 Figure 6. Component Placement Drawing Figure 7. Component Side PCB Drawing Rev. 0 | Page 8 of 12 06087-008 EVAL-AD5664REB Figure 8. Solder Side PCB Drawing Rev. 0 | Page 9 of 12 EVAL-AD5664REB ORDERING INFORMATION COMPONENT LISTING Table 3. Qty 1 1 1 1 1 1 1 1 1 8 1 1 1 1 5 1 2 22 1 1 4 1 4 1 2 2 1 1 5 7 18 Reference Designator U1 U2 U3 U4 U5 U6 U7 U8 Y1 VOUTA to VOUTD; J1 to J3, J11 J10 J6 J7 D1 C4, C5, C11, C18, C35 C37 C26, C27 C2, C3, C6 to C9, C12, C17, C19 to C23, C25, C28 to C34, C36 C24 C10 C13 to C16 R1 R2 to R5 R6 R7, R8 R11, R12 R10 R9 LK1 to LK4, LK10 LK5 to LK9, LK11, LK13 TP1 to TP18 Description AD5664RBRMZ-5 ADG774BRQZ REF195ESZ AD7476ARTZ (ADC) ADG738BRUZ ADP3303ARZ-3.3 CY7C68013-CSP 24LC01 24 MHz crystal Gold 50 Ω SMB jack USB mini B Power connectors Power connectors LED 10 μF 10 V tantalum cap (TAJ-B package) 10 μF 20 V tantalum cap (TAJ-B package) 22 pF (0603 package) 0.1 μF (0603 package) Supplier/Number Analog Devices Analog Devices Analog Devices Analog Devices Analog Devices Analog Devices Embassy CY7C68013-56LFC FEC 975-8070 FEC 569-872 FEC 365 1228 FEC 476-8309 FEC 151-786 FEC 151-785 FEC 359-9681 FEC 197-130 FEC 197-427 FEC 722-005 FEC 882-0023 2.2 μF (0603 package) 1 μF (0603 package) 0805 package (not inserted) 1.5 Ω Wire-wrap pin (not inserted) 1 kΩ (0603 package) 100 kΩ (0603 package) 2.2 kΩ (0603 package) 10 kΩ (0603 package) 0 (0603 package) Header (2 × 1 pin) Header (3 × 1 pin) Test point Digikey 490-1552-1-ND FEC 318-8840 ORDERING GUIDE Model EVAL-AD5664REB Package Description AD5664R Evaluation Board Kit ESD CAUTION Rev. 0 | Page 10 of 12 FEC 758-267 FEC 911-239 FEC 911 471 FEC 911-276 FEC 911-355 FEC 772-227 FEC 511-705 FEC 511-717 FEC 873-1144 EVAL-AD5664REB NOTES Rev. 0 | Page 11 of 12 EVAL-AD5664REB NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB06087-0-9/06(0) Rev. 0 | Page 12 of 12