EVAL-AD5421SDZ

Evaluation Board User Guide UG-250 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 16-Bit, Serial Input, Loop-Powered 4 mA to 20 mA DAC FEATURES EVALUATION BOARD DESCRIPTION Full-featured evaluation board for the AD5421 Link options PC control in conjunction with Analog Devices, Inc., system demonstration platform (SDP) PC software for control DOCUMENTS NEEDED The EVAL-AD5421 is a full-featured evaluation board, designed to allow the user to easily evaluate all features of the AD5421 loop-powered 4 mA to 20 mA DAC. The AD5421 pins are accessible at on-board connectors for external connection. The AD5421 evaluation board is controlled via the PC’s USB port in conjunction with Analog Device’s system demonstration platform board. The SDP board allows the evaluation board to be controlled through the USB port of a Windows® XP (SP2 or later) or Vista-based (32-bit) PC using the AD5421 evaluation software. The AD5421 serial interface is also accessible at the testpoint connections on the board. AD5421 data sheet DEVICE DESCRIPTION SOFTWARE NEEDED The AD5421 is an integrated device designed for use in looppowered 4 mA to 20 mA smart transmitter applications. The AD5421, in a single chip, provides a 16-bit DAC and current amplifier for digital control of the loop current, a voltage regulator to power the entire transmitter, a voltage reference, fault alert functions, flexible SPI-compatible serial interface, gain and offset adjust registers as well as other features and functions. EQUIPMENT NEEDED DC power supply unit SDP for PC control (EVAL-SDP-CB1Z) Voltmeter or ammeter AD5421 evaluation software Complete specifications for the AD5421 are available in the AD5421 data sheet available from Analog Devices and should be consulted in conjunction with this document when using the evaluation board. FUNCTIONAL BLOCK DIAGRAM PC USB PORT EVAL-AD5421SDZ DIGITAL ISOLATION LOOP+ SYSTEM DEMONSTRATION PLATFORM BOARD AD5421 09701-001 LOOP– Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. A | Page 1 of 12 UG-250 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Power Supplies ...............................................................................3 Equipment Needed ........................................................................... 1 Link Options ..................................................................................3 Documents Needed .......................................................................... 1 Evaluation Board Software Quick Start Procedures .....................5 Software Needed ............................................................................... 1 Software Installation .....................................................................5 Evaluation Board Description......................................................... 1 Software Operation .......................................................................5 Device Description ........................................................................... 1 Main Window ................................................................................6 Functional Block Diagram .............................................................. 1 Evaluation Board Schematics and Artwork ...................................7 Revision History ............................................................................... 2 Ordering Information .................................................................... 11 Evaluation Board Hardware ............................................................ 3 Bill of Materials ........................................................................... 11 REVISION HISTORY 10/11—Rev. 0 to Rev. A Change to Figure 4 ........................................................................... 7 3/11—Revision 0: Initial Version Rev. A | Page 2 of 12 Evaluation Board User Guide UG-250 EVALUATION BOARD HARDWARE Default Link Option Setup POWER SUPPLIES The default link options are listed in Table 1. The AD5421 evaluation board requires one power supply connection from LOOP− to LOOP+ (J7), a voltage in the range from 5.5 V to 52 V can be applied if the on-board MOSFET device (U2) is not enabled. With U2 enabled, the voltage limit is the breakdown voltage of U2, which in this case is 240 V. A load resistor can also be connected at J7. Table 1. Link Options LINK OPTIONS Set the link options on the evaluation board for the required operating setup before powering on the board. The functions of the link options are described in Table 2. Link No. LK1 LK2 LK4 LK6 LK7 Alarm_Dir Rint_Rext Range0 Range1 Reg_Sel0 Reg_Sel1 Reg_Sel2 Rev. A | Page 3 of 12 Option Inserted B Inserted Inserted Inserted B B B B A B A UG-250 Evaluation Board User Guide Table 2. Link Options Link No. LK1 LK2 LK4 LK6 LK7 Alarm_Dir Rint_Rext Range0, Range1 Reg_Sel2, Reg_Sel1, Reg_Sel0 Description This link connects the VLOOP input pin to the LOOP+ voltage via a 20:1 resistor divider. When this link is inserted, the VLOOP pin is connected to the resistor divider. When this link is removed, the VLOOP pin is unconnected and can be connected to another voltage (maximum 2.5 V) via TP26. This link enables/disables the MOSFET device. Position A disables the MOSFET device. Position B enables the MOSFET device and the loop supply is connected directly to the REGIN pin. This link enables/disables the iCoupler® digital isolators. When this link is inserted, the isolators are enabled. When this link is removed, the isolators are disabled. This link should be inserted when the MOSFET device is enabled (LK2 in Position B). This link should be removed when the MOSFET device is disabled (LK2 in Position A). This link completes the loop connection if a load resistor is not connected at Connector J7. This link should be inserted if a load resistor is not connected at Connector J7. This link should be removed if a load resistor is connected at Connector J7. This link selects the alarm current direction. Position A selects an upscale alarm current (22.8 mA or 24 mA). Position B selects a downscale alarm current (3.2 mA). This link selects to use either the internal or external current setting resistor. Position A selects the internal resistor. Position B selects the external resistor. These links select the loop current range. Range1 Range0 Loop Range B B 4 mA to 20 mA B A 3.8 mA to 21 mA A B 3.2 mA to 24 mA A A 3.8 mA to 21 mA These links select the voltage regulator output voltage. Reg_Sel2 Reg_Sel1 Reg_Sel0 Regulator Output Voltage B B B 1.8 V B B A 2.5 V B A B 3V B A A 3.3 V A B B 5V A B A 9V A A B 12 V Rev. A | Page 4 of 12 Evaluation Board User Guide UG-250 EVALUATION BOARD SOFTWARE QUICK START PROCEDURES SOFTWARE INSTALLATION SOFTWARE OPERATION The AD5421 evaluation kit includes self-installing software on a CD. The software is compatible with Windows XP (SP2) and Vista (32-bit). If the setup file does not run automatically, you can run setup.exe from the CD. To launch the software, complete the following steps: Install the evaluation software before connecting the evaluation board and SDP board to the USB port of the PC to ensure that the evaluation system is correctly recognized when connected to the PC. 2. 2. 3. After installation from the CD is complete, power up the AD5421 evaluation board as described in the Power Supplies section. Connect the SDP board to the AD5421 evaluation board and then to the USB port of your PC using the supplied cable. Either connector of the SDP board may be used. When the evaluation system is detected, proceed through any dialog boxes that appear. This finishes the installation. From the Start menu, select Analog Devices – AD5421; then select AD5421 Evaluation Software. The main window of the software displays (see Figure 3). If the evaluation system is not connected to the USB port when the software is launched, or if the AD5421 board is not connected to the SDP board, a connectivity error displays (see Figure 2). Simply connect the evaluation board to the USB port of the PC, wait a number of seconds, click Rescan, and follow the instructions. 09701-002 1. 1. Figure 2. Connectivity Error Alert Rev. A | Page 5 of 12 Evaluation Board User Guide 09701-003 UG-250 Figure 3. Main Window MAIN WINDOW DAC Register As can be seen in Figure 3, the main window is made up of 5 tabs; Control Register, DAC Register, Fault Register, Program Loop Current, and Command Write. Outside of the tab structure at the top right of the window are two control items; LDAC PIN to set the state of the LDAC pin and USE PEC to select whether packet error checking is used in the communications with the AD5421. There is also an indicator item; PEC Error, this alerts to a packet error in the data received from the AD5421. At the bottom of the window is a display of the contents of the fault register, this is updated on every communication with the AD5421 if Auto Fault Readback is enabled. The DAC Register tab allows the user to program the DAC register, offset adjust register, and gain adjust register. Control Register Command Write The Control Register tab is displayed by default. This tab allows the user to program the control register. The Command Write tab allows the user to read/write all of the AD5421s registers as well as issue commands. Fault Register The Fault Register tab allows the user to read the contents of the fault register. The fault register can also be polled continuously. Program Loop Current The Program Loop Current tab allows the user to program a loop current value directly by entering the value in milliamps after having first selected the loop current range that is set by the Range0 and Range1 link options. Rev. A | Page 6 of 12 Evaluation Board User Guide UG-250 EVALUATION BOARD SCHEMATICS AND ARTWORK 09701-004 Figure 4. Schematic of the AD5421 Circuitry Rev. A | Page 7 of 12 Evaluation Board User Guide 09701-005 UG-250 Figure 5. Schematic of the SDP Board Connector Rev. A | Page 8 of 12 UG-250 09701-006 Evaluation Board User Guide 09701-007 Figure 6. Component Placement Drawing Figure 7. Component Side PCB Drawing Rev. A | Page 9 of 12 Evaluation Board User Guide 09701-008 UG-250 Figure 8. Solder Side PCB Drawing Rev. A | Page 10 of 12 Evaluation Board User Guide UG-250 ORDERING INFORMATION BILL OF MATERIALS Table 3. Reference Designator C5 C6 C7 C8 C9 C10 C11 C12 C13 C15 D1 D2 D3 D4 J2 J3 J4 J5 J6 J7 L1 L2 LK1 LK2 LK4 LK6 LK7 R1 R3 R4 R15 R16 R18 R19 U1 U2 U3 U5 U6 Part Description Capacitor, F/TERM, 100 nF, 50 V, X7R Capacitor, F/TERM, 100 nF, 50 V, X7R Capacitor, F/TERM, 100 nF, 50 V, X7R Capacitor, F/TERM, 100 nF, 50 V, X7R Capacitor, F/TERM, 100 nF, 50 V, X7R Capacitor, F/TERM, 100 nF, 50 V, X7R Capacitor, 1 µF, 16 V, Case A tantalum Capacitor, F/TERM, 100 nF, 50 V, X7R Capacitor, F/TERM, 100 nF, 50 V, X7R Capacitor, 2.2 µF, 16 V, Case A tantalum LED, yellow, 0603 BAS516, high speed switching diodes BAS516, high speed switching diodes Diode ZENER, 4.7 V, 500 MW, SOD-80 Header, TIN, SIL, 32-way Header, TIN, SIL, 32-way Header, TIN, SIL, 32-way 2-pin terminal block (5 mm pitch) 120-way connector, 0.6 mm pitch 3-pin terminal block (5 mm pitch) Ferrite bead chip, series FB FB Ferrite bead chip, series FB FB 2-pin (0.1" pitch) header and shorting shunt 3-pin SIL header and shorting link 2-pin (0.1" pitch) header and shorting shunt 2-pin (0.1" pitch) header and shorting shunt 2-pin (0.1" pitch) header and shorting shunt Resistor, 24 kΩ, 0805, 5 ppm Resistor, 220 kΩ, 5%, 50 V, 0.063W, 0603 Resistor, 1 kΩ, 5%, 50 V, 0.063W, 0603 Resistor, HRC11 0805 18M MULTICOMP, resistor, 0603 953 kΩ RESISTOR, 0603, 100 kΩ, 1% RESISTOR, 0603, 100 kΩ, 1% Loop powered, 4 mA to 20 mA DAC Depletion mode, N-channel MOSFET Digital isolator Digital isolator 64K I2C serial EEPROM Part Number 06035C104KAZ2A 06035C104KAZ2A 06035C104KAZ2A 06035C104KAZ2A 06035C104KAZ2A 06035C104KAZ2A MCCTA105M016 06035C104KAZ2A 06035C104KAZ2A MCCTA225M016 LY Q971-H1K1-36-0-20-R18 BAS516 BAS516 FLZ4V7A 3-826936-2 3-826936-2 3-826936-2 CTB5000/2 FX8-120S-SV(21) CTB5000/3 FBMH3225HM102NT FBMH3225HM102NT M20-9990246 M20-9990345 and M7567-05 M20-9990246 M20-9990246 M20-9990246 PCF0805-13-24K-B-T1 MC 0.063W 0603 5% 220K MC 0.063W 0603 5% 1K RC0805JR-0718ML MC 0.063W 0603 1% 953K MC 0.063W 0603 1% 100K MC 0.063W 0603 1% 100K AD5421CREZ BSP129 ADUM1401ARWZ ADuM1201ARZ 24LC64-I/SN Rev. A | Page 11 of 12 Supplier/Number FEC 1301894 FEC 1301894 FEC 1301894 FEC 1301894 FEC 1301894 FEC 1301894 FEC 1190114 FEC 1301894 FEC 1301894 FEC 1190115 Digi-Key 475-2557-1-ND FEC 8734402 FEC 8734402 Digi-Key FLZ4V7ACT-ND FEC 5217805 and FEC 1212164 (x7) FEC 5217805 and FEC 1212164 (x7) FEC 5217805 and FEC 1212164 (x7) FEC 151789 FEC 1324660 FEC 151790 FEC 1651731 FEC 1651731 FEC 1022247 and FEC 150-411 FEC 1022248 and FEC 150410 FEC 1022247 and FEC 150-411 FEC 1022247 and FEC 150-411 FEC 1022247 and FEC 150-411 FEC 1108901 FEC 9331930 FEC 9331697 Yageo (Phycomp) FEC 9236422 FEC 1171085 FEC 9330402 FEC 9330402 AD5421CREZ FEC 1214279 ADuM1401ARWZ ADuM1201ARZ FEC 9758070 UG-250 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. 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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. UG09701-0-10/11(A) Rev. A | Page 12 of 12