Evaluation Board for the 10-Bit, Serial Input, High Voltage Digital Potentiometer EVAL-AD5292EBZ FEATURES GENERAL DESCRIPTION Full-featured evaluation board for the AD5292 Wiper buffer 4-wire ohm measurement capability Various link options Direct hookup to USB port of PC PC software for control of digipot 20-times programmable 1% resistance precision This data sheet describes the evaluation board for evaluating the AD5292 digital potentiometer. This device is a singlechannel, 1024-position digital potentiometer with less than ±1% end-to-end resistor tolerance error and 20-times programmable (20 TP) memory. The AD5292 is capable of operating at high voltages, supporting both dual supply ±10.5 V to ±15 V and single supply 21 V to 30 V operation. The AD5292 part uses a versatile 3-wire serial interface that operates at clock rates of up to 50 MHz and is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards. PACKAGE CONTENTS AD5292 evaluation board AD5292 device 3 V voltage regulator (ADP3303) Buffer (AD8510) CD, including Self-installing software that allows control of the digipot and exercise of all functions of the device Electronic version of the device data sheet Electronic version of the EVAL-AD5292EBZ data sheet The AD5292 evaluation board incorporates, for the logic voltage levels, an internal power supply from the USB and allows an external power supply. The logic voltage levels operate from single 2.7 V to 5.5 V supplies. The board can operate in single and dual supply modes and incorporates an output buffer. Complete specifications for the AD5292 part can be found in the AD5292 data sheet available from Analog Devices, Inc., and should be consulted in conjunction with this data sheet when using the evaluation board FUNCTIONAL BLOCK DIAGRAM DIGITAL POWER SUPPLY +5V EXTERNAL ANALOG POWER SUPPLY EXT. VDD VLOGIC SPI INTERFACE RDY RESET CONTROLLER CY7C68013 EEPROM AD5292 GND VSS A W B BUFFER SMB CONNECTORS POSITIVE ANALOG POWER SUPPLY SMB CONNECTORS NEGATIVE ANALOG POWER SUPPLY 08257-001 USB CONNECTORS +3.3V Figure 1. Rev. 0 Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards are 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. www.analog.com Tel: 781.329.4700 Fax: 781.461.3113 ©2009 Analog Devices, Inc. All rights reserved. EVAL-AD5292EBZ TABLE OF CONTENTS Features .............................................................................................. 1 Installing the Software ..................................................................4 Package Contents .............................................................................. 1 Running the Software ...................................................................4 General Description ......................................................................... 1 Software Operation .......................................................................5 Functional Block Diagram .............................................................. 1 Evalution Board Schematics and Artwork .....................................6 Revision History ............................................................................... 2 Ordering Information .................................................................... 10 Evaluation Board Hardware ............................................................ 3 Bill of Materials ........................................................................... 10 Power Supplies .............................................................................. 3 Ordering Guide .......................................................................... 10 Link Options ................................................................................. 3 ESD Caution................................................................................ 10 Evaluation Board Software .............................................................. 4 REVISION HISTORY 06/09—Revision 0: Initial Version Rev. 0 | Page 2 of 12 EVAL-AD5292EBZ EVALUATION BOARD HARDWARE POWER SUPPLIES LINK OPTIONS The EVAL-AD5292EBZ needs one digital supply and up to two analog supplies to operate. The digital supply is provided on the board, or it is possible to use an external supply by placing Link 8 in Position B and connecting a power supply in J4 (see Table 3). The analog supplies must be provided by the user through connectors J1, J2 and J3, which are VDD, GND, and VSS, respectively, as shown in Table 1. A number of link and switch options are incorporated into the evaluation board and should be set to the required operating setup before using the board. The functions of these link options are described in detail in Table 3. Table 2 describes the positions of the links to control the evaluation board by the PC via the USB port using the AD5292 in single-supply mode with the wiper buffer connected. All supplies are decoupled to ground with 10 μF tantalum and 0.1 μF ceramic capacitors. Table 2. Link Options Setup for PC Control (Default) Table 1. Maximum and Minimum Voltages Connectors Connector No. J1 J2 J3 J4 Voltage Analog positive power supply, VDD, as follows: 21 V to 30 V single-supply operation 10.5 V to15 V dual-supply operation Analog GND Analog negative power supply, VSS, as follows: 0 V single-supply operation −10.5 V to −15 V dual-supply operation Digital power supply from 2.7 V to 5 V Link No. LK2 LK4 LK5 LK6 LK7 LK8 LK9 Options Inserted Inserted Inserted Inserted Inserted A B Table 3. Link Functions Link No. LK1 LK2 LK3 LK4 1 LK5 LK6 LK7 1 LK8 LK9 1 Option Connects Terminal A of the digipot to VDD. Connects Terminal W of the digipot to the buffer. Connects Terminal B of the digipot as follows: LK3 A—VSS LK3 B—GND Connects the negative power supply of the buffer to GND. Connects the positive power supply of the buffer to VDD. Allows feedback in the buffer. Connects the negative power supply of the buffer to VSS. Selects the digital power supply as follows: LK8 A—5 V (from USB) LK8 B—3.3 V (from ADP3303) LK8 C—external supply from J4 connector Selects whether the AD5292 evaluation board is controlled by the PC via the USB port or by an external source via the SMB connectors, as follows: LK9 A—SMB connectors LK 9 B—USB port In single supply-power operation, it is recommended to connect LK4 and LK7. Rev. 0 | Page 3 of 12 EVAL-AD5292EBZ EVALUATION BOARD SOFTWARE INSTALLING THE SOFTWARE RUNNING THE SOFTWARE The AD5292 evaluation kit includes self-installing software on a CD-ROM. The software is compatible with Microsoft® Windows® 2000 and Windows XP. 1. 2. 2. 3. 4. Start the Windows operating system and insert the CD-ROM The installation software must open automatically. If it does not, run the setup.exe file from the CD. After installation is completed, power up the evaluation board as described in the Power Supplies section. Plug the AD5292 evaluation board into the PC using the USB cable that is included in the box. After the software detects the evaluation board, proceed through any dialog boxes that appear to finalize the installation. Figure 2. Error Message 3. To uninstall the program, click Start, Control Panel, Add or Remove Programs, AD5292. The main window of the AD5292 evaluation board software opens, as shown in Figure 3. 08257-003 1. 08257-002 The software should be installed before the evaluation board is connected to the USB port of the PC. This ensures that the board is correctly recognized when connected to the PC. To run the program, click Start, All Programs, ADI, AD5292 Eval Board, AD5292 Evaluation Board. If the PC is not connected to the board via the USB port, a message box advises you, as shown in Figure 1. Check the cable between the PC and the board, and click Retry. If the cable is connected, exit the program and try to reinstall it. Figure 3. AD5292 Evaluation Board Main Window Rev. 0 | Page 4 of 12 EVAL-AD5292EBZ • SOFTWARE OPERATION The main window is divided in three sections, as follows: READ shows the actual value of the RDAC or the value of the selected 20-TP memory location. These values are displayed in the resistor, as shown in Figure 4, and are updated when you read from or write to the part. 08257-005 • Save Value To 20-TP—saves into the 20-TP memory the value that is shown in the display (see Figure 5). It is necessary to click Write To Part to write to the part. 08257-004 Figure 5. Save Value to 20-TP Option (the Display Is in Hex Format) Figure 4. Resistor Figure: Left Position, Resistance from A to W; Right Position, Resistance from W to B • WRITE has the following options: • RDAC—changes the RDAC register contents. The value is in hex format. • Control Register—updates the control register contents. • Note that, if the enable program is disabled or the display value is different from the RDAC register, Write To Part does not appear (to prevent errors). • Reset (software)—sends a reset by software. It is necessary to click Write To Part to send the command. REGISTER shows the value of the control register. There are also three buttons that allow the following functions: • • • Rev. 0 | Page 5 of 12 Power-down/Power-up—powers the part down and up. When the button is clicked, the power-up/-down bit toggles automatically. Reset—sends a reset by hardware. EXIT—closes the program (it does not reset the part). EVAL-AD5292EBZ EVALUTION BOARD SCHEMATICS AND ARTWORK U1 AD5292 EXT_CAP VDD VSS VLOGIC 08257-006 Figure 6. Schematic of the AD5292 Circuitry Rev. 0 | Page 6 of 12 EVAL-AD5292EBZ SHIELD 08257-007 Figure 7. Schematic of the Controller Circuitry Rev. 0 | Page 7 of 12 08257-008 EVAL-AD5292EBZ 08257-009 Figure 8. Component Placement Drawing Figure 9. Component Side PCB Drawing Rev. 0 | Page 8 of 12 08257-010 EVAL-AD5292EBZ Figure 10. Solder Side PCB Drawing Rev. 0 | Page 9 of 12 EVAL-AD5292EBZ ORDERING INFORMATION BILL OF MATERIALS Table 4. Qty 25 1 3 4 2 1 2 1 1 1 1 1 7 1 1 4 1 2 1 1 16 1 2 1 1 1 1 1 1 Reference Designator C1 to C3, C5, C7, C10, C12, C14 to C23, C25 to C30, C34 C4 C13, C24, C33 C6, C8, C9, C11 C31, C32 D1 DGND, AGND J1 J2 J3 J4 J5 LK1 to LK7 LK8 LK9 R1, R2, R8, R9 R4 R5, R6 R7 R15 T1 to T8, TP-VOUT, VDD, VLOGIC, VSS, W, A, 3V3, B U1 U2, U3 U4 U5 U6 U7 Y1 Supplier1/Number FEC 1288255 Capacitor, 1 μF, 16 V, 0805, SMD Capacitor, 10 μF, 10 V, tantalum, SMD Capacitor, 10 μF, 35 V, dielectric tantalum Capacitor, 12 pF, 50 V, 0603, SMD LED, SMD green Testpoint, black Banana-red, socket, 4 mm Banana-black, socket, 4 mm Banana-red, socket, 4 mm Connector\power, 2-way, PCB USB-MINI-B Jumper and socket Jumper-3 and socket, 36-pin strip Jumper2\SIP3 and socket Resistor, 2.2 kΩ Resistor, 1 kΩ, 0603 Resistor, 100 kΩ, 0603 Resistor, 10 kΩ. 0603 Resistor, 0 Ω, 0603 Testpoint, red, PCB FEC 952-7710 FEC 197-130 FEC 970-8570 FEC 721-979 FEC 5790852 FEC 8731128 FEC 1101127 FEC 1101128 FEC 1101130 FEC 151789 FEC 56579-0576 FEC 1022247 and FEC 150-411 FEC 148-535 and FEC150-411 FEC 1022248 and FEC 150410 FEC 9330810 FEC 9330380 FEC 9330402 FEC 9330399 FEC 9331662 FEC 8731144 AD5292 ADG774 AD8510 ADP3303-3.3 CY7C68013-CSP microcontroller, 15 kB 24LC01, EEPROM, 64 k, SOIC8 XTAL1-CSM-8A, crystal, 24.0 MHz, 12 pF, SMD Analog Devices Analog Devices Analog Devices Analog Devices FEC 1269133 FEC 9758070 Digi-Key XC1009CT-ND FEC refers to Farnell Electronic Component Distributors; Digi-Key refers to Digi-Key Corporation. ESD CAUTION ORDERING GUIDE Model EVAL-AD5292EBZ1 1 Description Capacitor, 0.1 μF, 50 V, 0603, SMD Package Evaluation Board Z = RoHS Compliant Part. Rev. 0 | Page 10 of 12 EVAL-AD5292EBZ NOTES Rev. 0 | Page 11 of 12 EVAL-AD5292EBZ NOTES ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB08257-0-6/09(0) Rev. 0 | Page 12 of 12