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Evaluation Board User Guide UG-317 Evaluation Board for the ADM2682E/ADM2687E 5 kV rms Signal and Power Isolated RS-485 Transceivers with ±15 kV ESD Protection
FEATURES
5 kV rms power and signal isolated RS-485/RS-422 transceiver Convenient connections for power and signal through screw terminal blocks Configurable as half duplex or full duplex 5 V or 3.3 V operation Easily configurable through jumper connections Test points for measuring all signals Layout optimized for emissions according to the AN-0971 Application Note EVALUATION KIT CONTENTS EVAL-ADM2682EEBZ or EVAL-ADM2687EEBZ GENERAL DESCRIPTION The ADM2682E/ADM2687E evaluation board can be used for easy evaluation of the ADM2682E and ADM2687E power and signal isolated RS-485 transceivers. Screw terminal blocks provide convenient connections for the power and signal connections. The evaluation board is easily configured through jumper connections. The board can be used in half-duplex or full- duplex configurations and has a 120 Ω termination resistor fitted on the receiver input. The evaluation board can be used with either the ADM2682E 16 Mbps part or the ADM2687E 500 kbps part. The driver and receiver are enabled and disabled by jumper connections. Test points are included on the power and signal lines on both sides of the isolation barrier. RADIATED EMISSIONS The ADM2682E/ADM2687E evaluation board is designed to reduce emissions generated by the high frequency switching elements used by the isoPower® technology to transfer power through its transformer. The layout of the evaluation board was generated using the guidelines provided in the AN-0971 Application Note, Recommendations for Control of Radiated Emissions with isoPower Devices. EVALUATION BOARD 10174-001 Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 12
UG-317 Evaluation Board User Guide Rev. 0 | Page 2 of 12 TABLE OF CONTENTS
REVISION HISTORY
10/11—Revision 0: Initial Version
to connect A to Y and B to Z). tion to another, as specified in Table 1. Figure 2. Basic Operation of the Evaluation Board for the ADM2682E/ADM2687E Isolated RS-485 Transceivers Table 1. Jumper Configuration LK1 A Connects the receiver output (RxD) of the ADM2682E/ADM2687E to the J3 connector. B Connects the receiver output (RxD) of the ADM2682E/ADM2687E to the J8-1 terminal block connector. disabled, or when the driver is disabled, the receiver is enabled. LK3 A Connects the driver enable input (DE) of the ADM2682E/ADM2687E to VCC. This setting enables the driver. B Connects the driver enable input (DE) of the ADM2682E/ADM2687E to GND1. This setting disables the driver. C Connects the driver enable input (DE) of the ADM2682E/ADM2687E to the J8-3 terminal block connector. LK4 A Connects the driver input (TxD) of the ADM2682E/ADM2687E to the J8-4 terminal block connector. B Connects the driver input (TxD) of the ADM2682E/ADM2687E to the J2 connector. the evaluation board is configured for half-duplex operation. Open When LK5 and LK6 are both open, the evaluation board is configured for full-duplex operation. the evaluation board is configured for half-duplex operation. Open When LK5 and LK6 are both open, the evaluation board is configured for full-duplex operation.
Circuit Implementation Guide. voltage (for example, 960 Ω for 3.3 V and 1440 Ω for 5 V). Application Note, RS-485/RS-422 Circuit Implementation Guide.
- On the logic side of the board, the C1 and C2 capacitors should be 10 μF and 100 nF ceramic capacitors, respectively, and the C4 and C6 capacitors should be 10 nF and 100 nF ceramic capacitors, respectively.
- On the bus side of the board, the C5 and C7 capacitors should be 10 nF and 100 nF, respectively, and the C8 and C9 capacitors should be 100 nF and 10 μF, respectively. BOARD INTERNAL LAYER THICKNESS The ADM2682E/ADM2687E evaluation board consists of six layers with four internal layers. The spacing between the internal board layers was chosen as specified in Table 2 to maximize the stitching capacitance on the board.
Table 2. Spacing Between Layers of the Evaluation Board
Figure 3. Schematics of the ADM2682E/ADM2687E Evaluation Board
Figure 10. Bottom Solder Layer
Evaluation Board User Guide UG-317 Rev. 0 | Page 9 of 12
ORDERING INFORMATION
Table 3. Quantity Reference Designator Description Supplier Part No.
4 R1, R2, R3, R4 Resistor, size 0805 (not inserted) Not inserted Not inserted
1 R6 Resistor, 0 Ω, size 0805 Vishay Draloric CRCW08050000Z0EA
1 RT Resistor, 120 Ω, size 0805 Multicomp MC 0.1W 0805 1%
1 RT1 Resistor, size 0805 (not inserted) Not inserted Not inserted
2 C1, C9 Capacitor, size 0805, 10 μF AVX 0805ZD106KAT2A
4 C2, C6, C7, C8 Capacitor, size 0805, 100 nF Multicomp MCCA000274
1 C3 Capacitor, tantalum, Case C, 22 μF AVX TAJC226K016RNJ
2 C4, C5 Capacitor, size 0805, 10 nF AVX 08053C103KAT2A
1 C10 Capacitor, size 0805 (not inserted) Not inserted Not inserted
1 J1 CON\\POWER, 2-pin terminal block (5 mm pitch) Camden Electronics CTB5000/2
2 J2, J3 PCB SMB jack (square) Multicomp 24-14-2-TGG
1 J4 CON\\POWER6, 6-pin terminal block Camden Electronics CTB5000/6
1 J8 CON\\POWER4, 4-pin terminal block Camden Electronics CTB5000/4
2 LK1, LK4 4-pin (2 × 2), 2.54 mm header and shorting block Harwin M20-9953646 and M7566-05 1 LK2 8-pin (4 × 2), 2.54 mm header and shorting block Harwin M20-9953646 and M7566-05 1 LK3 6-pin (3 × 2), 2.54 mm header and shorting block Harwin M20-9953646 and M7566-05 2 LK5, LK6 2-pin (1 × 2), 2.54 mm header and shorting block Harwin M20-9953646 and M7566-05
1 U1 16-lead, wide body SOIC with increased creepage Analog Devices ADM2682EBRIZ or
2 GND1, GND2 Test point, black Vero Technologies 20-2137
2 VCC, VISO Test point, red Vero Technologies 20-313137
8 RXD, RE, DE, TXD, A, B, Z, Y Test point, yellow Vero Technologies 20-313140
ADM2682E 16 Mbps, 5 kV rms Signal and Power Isolated RS-485 Transceiver with ±15 kV ESD Protection ADM2687E 500 kbps, 5 kV rms Signal and Power Isolated RS-485 Transceiver with ±15 kV ESD Protection AN-960 RS-485/RS-422 Circuit Implementation Guide AN-0971 Recommendations for Control of Radiated Emissions with isoPower Devices
UG-317 Evaluation Board User Guide Rev. 0 | Page 10 of 12 NOTES
Evaluation Board User Guide UG-317 Rev. 0 | Page 11 of 12 NOTES
UG-317 Evaluation Board User Guide Rev. 0 | Page 12 of 12 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. 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. ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the prop erty of their respective owners. UG10174-0-10/11(0)