EVAL-ADM3053EBZ User Guide UG-234 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 Evaluating the ADM3053 Signal and Power Isolated CAN Transceiver with Integrated Isolated DC-to-DC Converter FEATURES GENERAL DESCRIPTION Signal and power isolated ADM3053 CAN transceiver with isoPower integrated isolated dc-to-dc converter PCB layout optimized for low radiated emissions; passes EN55022 Class B (certification available) Standard 4-layer PCB solution for radiated emissions Screw terminal connectors for prototyping Logic signals RXD and TXD Power supply VCC and VIO Bus signals CANH and CANL PCB ground GND1 and GND2 SMA connectors for TXD and RXD On-board LDO for 6 V to 9 V supply, providing 5 V on ADM3053 VCC pin 5 V or 3.3 V operation on VIO Test points for logic signals, power supplies, grounds, and bus signals On-board 30 + 30 termination resistors to simulate full bus load (60 ) The EVAL-ADM3053EBZ allows for the simple evaluation of the ADM3053 signal and power isolated controller area network (CAN) transceivers. The evaluation board allows all of the input and output functions to be exercised without the need for external components. EVALUATION KIT CONTENTS For full details, see the ADM3053 data sheet, which must be used in conjunction with this user guide when using the evaluation board. The EVAL-ADM3053EBZ device employs Analog Devices, Inc., iCoupler(R) technology to combine a 2-channel isolator, a CAN transceiver, and an Analog Devices isoPower(R) dc-to-dc converter into a single small outline IC (SOIC) surface-mount package. An on-chip oscillator outputs a pair of square waveforms that drive an internal transformer to provide isolated power. The device is powered by a single 5 V supply, realizing a fully isolated CAN solution. The ADM3053 contains isoPower technology that uses high frequency switching elements to transfer power through the transformer. For layout guidelines, see the AN-0971 Application Note. EVAL-ADM3053EBZ evaluation board DOCUMENTS NEEDED ADM3053 data sheet 09833-001 EVAL-ADM3053EBZ EVALUATION BOARD PHOTOGRAPH Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. A | Page 1 of 10 UG-234 EVAL-ADM3053EBZ User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Overlapping Stitching Capacitor .................................................4 Evaluation Kit Contents ................................................................... 1 PCB Layout Reccomendations ....................................................4 Documents Needed .......................................................................... 1 EN55022 Radiated Emissions Test Results ................................4 General Description ......................................................................... 1 Evaluation Board Schematics and Artwork ...................................6 EVAL-ADM3053EBZ Evaluation Board Photograph ................. 1 Ordering Information .......................................................................9 Revision History ............................................................................... 2 Bill of Materials ..............................................................................9 Evaluation Board Hardware ............................................................ 3 Related Links ......................................................................................9 Setting Up the Evaluation Board ................................................ 3 REVISION HISTORY 7/2017--Rev. 0 to Rev. A Deleted ADM3053 Applications Section, Equipment Needed Section, and Functional Block Diagram Section.......................... 1 Changes to Features Section and Figure 1..................................... 1 Added Evaluation Kit Contents Section, Documents Needed Section, and Evaluation Board Photograph Section .................... 1 Changes to Setting Up the Evaluation Board Section and Figure 3 .............................................................................................. 3 Added Table 1, Renumbered Sequentially .................................... 3 Added Overlapping Stitching Capacitors Section, PCB Layout Recommendations Section, EN55022 Radiated Emissions Test Results Section, and Figure 4; Renumbered Sequentially ............ 4 Added Figure 5, Figure 6, and Table 2 ............................................5 Changes to Figure 7 ...........................................................................6 Deleted Figure 9 and Figure 10........................................................6 Changes to Figure 8 and Figure 10..................................................7 Added to Figure 9 ..............................................................................7 Changes to Figure 11, Figure 12, and Figure 13 ............................8 Changes to Table 3 and Related Links Section ..............................9 7/2011--Revision 0: Initial Version Rev. A | Page 2 of 10 EVAL-ADM3053EBZ User Guide UG-234 EVALUATION BOARD HARDWARE boards together, replace these values with 60 + 60 , or if connecting one board to a double terminated bus, remove both resistors (R5 and R6 not fitted). Table 1 shows parameters set by the on-board resistors. SETTING UP THE EVALUATION BOARD The EVAL-ADM3053EBZ evaluation board default configuration is shown in Figure 3. In the default configuration, R2 is fitted with a 0 resistor, and R3 is open, which allows VIO to be powered by 3.3 V or 5 V on J4, corresponding to the logic levels required for TXD and RXD. A power supply with a voltage of 6 V to 9 V is required on the input supply, Pin 8 (IN) of the onboard low dropout regulator, LDO (VCC on J5). The on-board LDO generates the required 5 V to the ADM3053 VCC pin. By fitting R3 with a 0 resistor and removing R2, VIO of the EVALADM3053EBZ is connected to the ADM3053 VCC pin, and the complete board can be powered by a 9 V battery (for example, for electromagnetic current (EMC) testing). Figure 3 shows an example operation of the EVAL-ADM3053EBZ. Connect a clock generator on TXD and set up a 500 kHz square wave clock with the output swinging between 0 V and 5 V. Connect the scope probes to the test points: TXD, RXD, CANH, and CANL. Figure 2 shows an example oscilloscope plot; Channel 1 shows the TXD signal, and Channel 2 and Channel 3 show the CANH and CANL signals. TEK STOP: 50.0MS/s VCC supplies power to the isoPower circuitry, and VIO supplies the iCoupler circuitry. Decoupling capacitors of values 0.1 F and 10 F are fitted to C3 and C4 between VCC and GND1 and of values 0.01 F and 0.1 F to C1 and C2 between VIO and GND1. On the bus side, it is required that VISOIN connect to VISOOUT. A 10 F reservoir capacitor (C8) and a 0.1 F decoupling capacitor (C7) are fitted between VISOOUT and GND2. Two 0.1 F and 0.01 F decoupling capacitors (C5 and C6) are fitted between VISOIN and GND2. 1 J1 RXD J2 TXD RXD R2 R3 3.3V OR 5V POWER SUPPLY VIO GND1 GND2 M 1.00s CH1 1.20V Figure 2. ADM3053 TXD, CANH, and CANL Signals GND2 VREF CANH CANL VIO VCC VISO SHIELD VCC (VIN) J5 J6 OSCILLOSCOPE EVAL-ADM3053EBZ Rev B 09833-001 J4 CH2 2.00V GND1 TXD J3 CH1 2.00V CH3 2.00V 09833-002 3 2 Resistor R4 connects the ADM3053 RS pin to GND2 to adjust the slope of the CANH and CANL signals, as required. Resistor R4, by default, is a 0 resistor for full speed operation. Replacing R4 with a 47 k resistor (or similar) limits the slew rate of the CANH and CANL signals. By default, the R5 and R6 resistors load the ADM3053 CANH pin and CANL pin with 60 (30 + 30 ) to simulate a double terminated bus. If connecting two SIGNAL GENERATOR 136 ACQS 6V TO 9V POWER SUPPLY Figure 3. Basic Isolated CAN Transceiver Evaluation Board Operation Table 1. Parameters Set by On-Board Resistors Resistor(s) R2, R3 R4 R5, R6 Values 0 for R2, R3 not fitted R2 not fitted, 0 for R3 0 47 k Both 30 Both 60 Both not fitted Default Yes No Yes No Yes No No Test Conditions/Comments VIO connected to J4 VIO connected to the ADM3053 VCC/5 V LDO output (J4 VIO unconnected) ADM3053 in full speed mode ADM3053 in slope control mode Simulates double terminated bus Allows another node with 120 termination to be connected Allows a double terminated bus to be connected Rev. A | Page 3 of 10 UG-234 EVAL-ADM3053EBZ User Guide OVERLAPPING STITCHING CAPACITOR The evaluation board implements an embedded stitching capacitor structure. A printed circuit board (PCB) embedded stitching capacitor is created when two metal planes in a PCB overlap each other and are separated by dielectric material. This overlap is formed by extending the internal reference planes from the primary and secondary layers across the area that is used for creepage on the PCB surface. This capacitor provides a return path for high frequency common-mode noise currents across the isolation gap. The overlapping area is 24.9 mm x 6.3 mm, the distance between overlapping layers is ~0.7 mm; therefore, the plate capacitor is around 8.9 pF. For full details on the layout and implementation of embedded stitching capacitors, see the AN-0971 Application Note, Recommendations for Control of Radiated Emissions with isoPower Devices. Ensure that there is a keep out area in the PCB layout around the L1 and L2 ferrites (no PCB planes under or alongside L1 and L2). The ADM3053 evaluation board reduces emissions generated by the high frequency switching elements used by the isoPower technology to transfer power through the integrated isolated dc-to-dc power supply. The layout of the evaluation board is generated using guidelines similar to those in the AN-1349 Application Note, PCB Implementation Guidelines to Minimize Radiated Emissions on the ADM2582E/ADM2587E RS-485/ RS-422 Transceivers. 09833-004 PCB LAYOUT RECCOMENDATIONS Figure 4. Layout Notes for EVAL-ADM3053EBZ To pass EN55022 Class B on a 4-layer PCB, the following layout guidelines are recommended: Best practice decoupling on the PCB per the ADM3053 data sheet. Place ferrite beads between the PCB trace/plane connections and the ADM3053 VISOOUT pin (Pin 12) and GND2 pins (Pin 11 and Pin 13). Do not connect the VISOOUT pin to a power plane; connect between the VISOOUT pin and the VISOIN pin using a PCB trace. Ensure VISOOUT (Pin 12) is connected first through the L1 ferrite before connecting to VISOIN (Pin 19), as shown in Figure 4. An embedded stitching capacitor between the GND1 PCB plane and GND2 Pin 11 and Pin 13 (inside L2 ferrite) using internal layers of the PCB planes as highlighted in the area around U1 in Figure 4 (see the Overlapping Stitching Capacitor section). The following additional notes apply to the PCB layout; refer to the schematic and artwork in Figure 7 to Figure 13. Ensure that GND2 (Pin 13) is connected to GND2 (Pin 11) on the inside (device side) of the C7 100 nF capacitor. Ensure that the C7 capacitor is connected between VISOOUT (Pin 12) and GND2 (Pin 11) on the device side of the L1 and L2 ferrite beads. Ensure that GND2 (Pin 16) is connected to the main bus side PCB ground plane outside of the L2 ferrite, as shown in Figure 4. Locate the power delivery circuit in close proximity to the ADM3053 device, to ensure that the VCC trace is as short as possible. The EVAL-ADM3053EBZ PCB has a power delivery circuit located at the bottom of the PCB with a short trace from the ADP667ARZ regulator output (U3) to VCC (Pin 8). This layout example minimizes the loop area in which high frequency current can flow. An increase in the loop area results in an increase in the emissions levels. EN55022 RADIATED EMISSIONS TEST RESULTS The EVAL-ADM3053EBZ evaluation board is tested and certified to pass EN55022 Class B with a 2.48 dB V/m margin. EN55022 certification documents for the EVAL-ADM3053EBZ evaluation board is available to users upon request from Analog Devices. Table 2 provides a summary of the results. All EN55022 radiated emissions tests are performed with the PCB schematic and layout as described in Figure 7 to Figure 13. The EVAL-ADM3053EBZ evaluation boards are configured and tested with 5.0 V power supplied to the ADM3053 VIO pin and VCC pin, with the power supplied from the ADP667ARZ regulator output. The ADP667ARZ regulator input is supplied from a standard 9 V battery. Testing is performed with an active 500 kbps clock on the TXD pin supplied by an on-board oscillator fitted to U2. The ADM3053 CAN bus pins are loaded with a 60 termination resistor (per a double terminated bus). Measurements are carried out in an anechoic chamber at 10 m from 30 MHz to 3 GHz. Figure 5 and Figure 6 show the results of the peak horizontal and vertical scans, and Table 2 shows the tabulated quasi-peak (QP) results. Rev. A | Page 4 of 10 UG-234 80 80 70 70 PEAK EMISSIONS (dBV/m) 60 50 EN55022 CLASS A LIMIT 40 30 EN55022 CLASS B LIMIT 20 50 40 30 EN55022 CLASS A LIMIT EN55022 CLASS B LIMIT 20 10 0 30 100 1000 FREQUENCY (MHz) 09833-005 10 60 Figure 5. Horizontal Scan From 30 MHz to 1000 MHz 0 30 100 1000 FREQUENCY (MHz) 09833-006 PEAK EMISSIONS (dBV/m) EVAL-ADM3053EBZ User Guide Figure 6. Vertical Scan from 30 MHz to 1000 GHz Table 2. ADM3053 Test Results (Quasi-Peak Measurements) Frequency (MHz) 182.330 364.902 182.027 364.058 QP Level dB (V/m) 17.5 31.9 12.0 22.1 EN55022 Class B dB (V/m) 30 37 30 37 Rev. A | Page 5 of 10 Antenna Position Horizontal Horizontal Vertical Vertical Antenna Height (m) 4.00 2.50 1.00 1.50 Pass/Fail Pass Pass Pass Pass UG-234 EVAL-ADM3053EBZ User Guide EVALUATION BOARD SCHEMATICS AND ARTWORK 09833-007 Figure 7. EVAL-ADM3053EBZ Evaluation Board Schematic Rev. A | Page 6 of 10 UG-234 09833-008 EVAL-ADM3053EBZ User Guide 09833-009 Figure 8. EVAL-ADM3053EBZ Evaluation Board Silkscreen (Top) 09833-010 Figure 9. EVAL-ADM3053EBZ Evaluation Board Silkscreen (Bottom) Figure 10. EVAL-ADM3053EBZ Evaluation Board Component Side Rev. A | Page 7 of 10 EVAL-ADM3053EBZ User Guide 09833-011 UG-234 09833-012 Figure 11. EVAL-ADM3053EBZ Evaluation Board Layer 2 09833-013 Figure 12. EVAL-ADM3053EBZ Evaluation Board Layer 3 Figure 13. EVAL-ADM3053EBZ Evaluation Board Solder Side Rev. A | Page 8 of 10 EVAL-ADM3053EBZ User Guide UG-234 ORDERING INFORMATION BILL OF MATERIALS Table 3. Quantity 2 6 2 1 2 1 3 2 1 2 1 1 1 1 2 5 2 3 1 Name C1, C5 C2, C3, C6, C7, C11, C12 C4, C8 C9 C10, C13 C14 (not placed) J1, J4, J5 J2, J3 J6 L1, L2 R1 (not placed) R2, R7 R3 (not placed) R4 R5, R6 CANH, CANL, RXD, TXD, VREF GND1, GND2 VCC, VIO, VISO U1 1 U2 1 U3 (not placed) Description Capacitor, X7R, 10 nF, 0603 Capacitor, X7R, 100 nF, 0603 Capacitor, X7R, 10 F, 0805 Capacitor, X7R, 47 nF, 0603 Capacitor, tantalum, 10 F, Case C Capacitor, X7R, 100 nF (optional) 2-pin terminal block SMA, straight jack 4-pin terminal block Ferrite bead, 1.8 k at 100 MHz Resistor, 402 k, 0603 (optional) Resistor, 0 , 0805 Resistor, 0 , 0805 (optional) Resistor, 0 , 0603 Resistor, thick film, 30 , 0.5 W, 0805 Test point, yellow Test point, black Test point, red ADM3053 isolated CAN transceiver with isoPower integrated dc-to-dc converter 5 V fixed, adjustable low dropout linear voltage regulator Oscillator, 1 kHz to 20 MHz (optional) Supplier Multicomp Multicomp AVX Multicomp Kemet Multicomp Lumberg TE Connectivity Lumberg Murata Multicomp Vishay Draloric Vishay Draloric Multicomp Panasonic Vero Vero Vero Analog Devices Part No. MC0603B103K160CT MC0603B104K160CT 0805ZC106KAT2A MC0603B473K500CT B45196E3106K309 MC0603B104K160CT KRM 02 5-1814832-1 KRM 04 BLM15HD182SN1D MC0063W06031402K CRCW08050000ZSTA CRCW08050000ZSTA MC0063W06030R ERJP06F30R0V 20-313140 20-2137 20-313137 ADM3053BRWZ Analog Devices ADP667ARZ Linear Technology LTC6900CS5#TRMPBF RELATED LINKS Resource ADM3053 AN-1349 AN-1123 AN-0971 Description Signal and Power isolated CAN Transceiver with Integrated Isolated DC-to-DC Converter PCB Implementation Guidelines to Minimize Radiated Emissions on the ADM2582E/ADM2587E RS-485/RS-422 Transceivers Controller Area Network (CAN) Implementation Guide Recommendations for Control of Radiated Emissions with isoPower Devices Rev. A | Page 9 of 10 UG-234 EVAL-ADM3053EBZ 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. 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. (c)2011-2017 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG09833-0-7/17(A) Rev. A | Page 10 of 10