Evaluation Board User Guide UG-124 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 ADM3251E Evaluation Kit (EVAL-ADM3251EEB1Z) with Reduced EMI FEATURES GENERAL DESCRIPTION 2.5 kV fully isolated (power and data) RS-232 transceiver The ADM3251E evaluation board can be used for easy evaluation Convenient connections for power and signal through screw of the ADM3251E power and signal isolated RS-232 transceiver. terminal blocks Screw terminal blocks provide convenient connections for the 5 V operation power and signal connections. Test points are included on the Easily configurable through jumper connections power and signal lines on both sides of the isolation barrier. Test points for measuring all signals RADIATED EMISSIONS All external components required for correct operation The ADM3251E evaluation board is designed to reduce emissions EVALUATION KIT CONTENTS generated by the high frequency switching elements used by the ADM3251E evaluation board isoPower® technology to transfer power through its transformer. 2 ADM3251E samples Guidelines mentioned in the AN-0971 Application Note, Recommendations for Control of Radiated Emissions with isoPower Devices, were used to generate the layout. Guide guarding and a buried capacitive layer were implemented. The emissions of the evaluation board were measured by an independent test facility and passed the EN55022 (2001) Class B emissions standard. DIGITAL PICTURE OF EVALUATION BOARD 08974-001 Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 8

UG-124 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Evaluation Board Hardware .............................................................3 Evaluation Kit Contents ................................................................... 1 Connector, Test Point, and Jumper Functions ..........................3 General Description ......................................................................... 1 Evaluation Board Schematic ............................................................4 Radiated Emissions .......................................................................... 1 Assembly Drawings and Board Layout ..........................................5 Digital Picture of Evaluation Board ............................................... 1 Ordering Information .......................................................................8 Revision History ............................................................................... 2 Bill of Materials ..............................................................................8 REVISION HISTORY 4/10—Revision 0: Initial Version Rev. 0 | Page 2 of 8

Evaluation Board User Guide UG-124 EVALUATION BOARD HARDWARE CONNECTOR, TEST POINT, AND JUMPER FUNCTIONS Table 1. Connector Functions Connector Name Function J15 Power connector J15-1: connects positive supply of bench supply to the V plane CC J15-2: connects ground terminal of bench supply to the GND plane J20 Terminal block J20-1: connects to R pin of ADM3251E OUT J20-2: connects to T pin of ADM3251E IN J17 Power connector J17-1: connects positive supply of the isolated bench supply to the V plane ISO J17-2: connects ground terminal of the isolated bench supply to the GND plane ISO J16 Terminal block J16-1: connects to T pin of ADM3251E OUT J16-2: connects to R pin of ADM3251E IN Table 2. Test Point Functions Test Point Function GND2 Connects to GND plane VCC2 Connects to V plane CC ROUT2 Connects to R pin of the ADM3251E OUT TIN2 Connects to T pin of the ADM3251E IN ISOVCC2 Connects to V plane ISO TOUT2 Connects to T pin of the ADM3251E device OUT RIN2 Connects to R pin of the ADM3251E device IN ISOGND2 Connects to GND plane ISO Table 3. Jumper Functions Jumper Function Default J21 Connects Pin 20 (V ) to J17-1 Inserted ISO Rev. 0 | Page 3 of 8

UG-124 Evaluation Board User Guide EVALUATION BOARD SCHEMATIC 08974-002 Figure 2. Schematic of the ADM3251E Evaluation Board Rev. 0 | Page 4 of 8

Evaluation Board User Guide UG-124 ASSEMBLY DRAWINGS AND BOARD LAYOUT 08974-003 Figure 3. Top Layer 08974-004 Figure 4. Silkscreen Rev. 0 | Page 5 of 8

UG-124 Evaluation Board User Guide 08974-005 Figure 5. Internal Layer 2 08974-006 Figure 6. Internal Layer 3 08974-007 Figure 7. Internal Layer 4 Rev. 0 | Page 6 of 8

Evaluation Board User Guide UG-124 08974-008 Figure 8. Internal Layer 5 08974-009 Figure 9. Bottom Solder Layer Rev. 0 | Page 7 of 8

UG-124 Evaluation Board User Guide ORDERING INFORMATION BILL OF MATERIALS Table 2. Qty Reference Designator Part Type Value Part No. 6 C13, C14, C15, C16, C17, C18 Capacitor, 0402 0.1 μF FEC 1288252 8 GND2, ISOGND2, ISOVCC2, RIN2, Test point FEC 240333 ROUT2, TIN2, TOUT2, VCC2 4 J15, J16, J17, J20 Terminal block FEC 151785 1 J21 Jumper FEC 1022247 and FEC 150411 1 U3 Line driver/receiver ADM3251EARWZ 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. ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG08974-0-4/10(0) Rev. 0 | Page 8 of 8