24-14-2-TGG [ADI]
Evaluation Board User Guide; 评估板用户指南
| 型号： | 24-14-2-TGG |
| 厂家： | 
ADI |
| 描述： | Evaluation Board User Guide |
| 文件： | 总12页 (文件大小：568K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Evaluation Board User Guide
UG-317
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 the ADM2682E/ADM2687E 5 kV rms Signal and
Power Isolated RS-485 Transceivers with 15 kV ESD Protection
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.
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
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 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.
EVALUATION BOARD
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
TABLE OF CONTENTS
Features .............................................................................................. 1
Termination and Pull-Up/Pull-Down Resistors .......................4
Decoupling and Reservoir Capacitors........................................4
Board Internal Layer Thickness ..................................................4
Evaluation Board Schematics...........................................................5
Assembly Drawings and Board Layout ..........................................6
Ordering Information.......................................................................9
Bill of Materials..............................................................................9
Related Links..................................................................................9
Evaluation Kit Contents................................................................... 1
General Description......................................................................... 1
Radiated Emissions .......................................................................... 1
Evaluation Board .............................................................................. 1
Revision History ............................................................................... 2
Evaluation Board Hardware Configuration.................................. 3
Test Setup....................................................................................... 3
Jumper Settings............................................................................. 3
REVISION HISTORY
10/11—Revision 0: Initial Version
Rev. 0 | Page 2 of 12
Evaluation Board User Guide
UG-317
EVALUATION BOARD HARDWARE CONFIGURATION
TEST SETUP
JUMPER SETTINGS
The ADM2682E/ADM2687E evaluation board is shown
in Figure 2 with the default jumper settings on LK1 through
LK4 (driver and receiver enabled), power connection on J1,
input signal connection on J2, and probes attached to RXD,
TXD, Y, and Z for a loopback test (LK5 and LK6 are closed
to connect A to Y and B to Z).
The inputs to the ADM2682E/ADM2687E can be configured
using the jumpers on the evaluation board (see Table 1). Note
that multiple jumper blocks should not be placed on LK1 to
LK4 because the input sources may be shorted together. For
each link, a single jumper block can be moved from one posi-
tion to another, as specified in Table 1.
3.3V OR 5V
POWER
SUPPLY
SIGNAL
GENERATOR
OSCILLOSCOPE
J1
EVAL-ADM2682E_87EEBZ
LK1
GND1
J3
A
B
RXD
GND2
LK2
VCC
A
B
C
D
A
B
Z
LK6
LK5
RXD
RE
A
RXD
RE
B
Z
Y
DE
TXD
LK3
LK4
DE
A
B
C
Y
VISO
TXD
SHIELD
TXD
A
B
J4
J2
Figure 2. Basic Operation of the Evaluation Board for the ADM2682E/ADM2687E Isolated RS-485 Transceivers
Table 1. Jumper Configuration
Link
Connection Description
LK1
A
B
A
B
C
D
Connects the receiver output (RxD) of the ADM2682E/ADM2687E to the J3 connector.
Connects the receiver output (RxD) of the ADM2682E/ADM2687E to the J8-1 terminal block connector.
Connects the receiver enable input (RE) of the ADM2682E/ADM2687E to VCC. This setting disables the receiver.
Connects the receiver enable input (RE) of the ADM2682E/ADM2687E to GND1. This setting enables the receiver.
Connects the receiver enable input (RE) of the ADM2682E/ADM2687E to the J8-2 terminal block connector.
LK2
Connects the receiver enable input (RE) of the ADM2682E/ADM2687E to the driver enable input (DE); that is, the
input for both RE and DE is set by LK3. This setting ensures that when the driver is enabled, the receiver is
disabled, or when the driver is disabled, the receiver is enabled.
LK3
A
B
C
Connects the driver enable input (DE) of the ADM2682E/ADM2687E to VCC. This setting enables the driver.
Connects the driver enable input (DE) of the ADM2682E/ADM2687E to GND1. This setting disables the driver.
Connects the driver enable input (DE) of the ADM2682E/ADM2687E to the J8-3 terminal block connector.
Connects the driver input (TxD) of the ADM2682E/ADM2687E to the J8-4 terminal block connector.
Connects the driver input (TxD) of the ADM2682E/ADM2687E to the J2 connector.
LK4
LK5
A
B
Closed
Connects the ADM2682E/ADM2687E Receiver Input A to Driver Output Y. When LK5 and LK6 are both connected,
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.
LK6
Closed
Connects the ADM2682E/ADM2687E Receiver Input B to Driver Output Z. When LK5 and LK6 are both connected,
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.
Rev. 0 | Page 3 of 12
UG-317
Evaluation Board User Guide
TERMINATION AND PULL-UP/PULL-DOWN
RESISTORS
DECOUPLING AND RESERVOIR CAPACITORS
The evaluation board uses the following decoupling and
reservoir capacitors:
The evaluation board includes the RT and RT1 footprints for
fitting termination resistors between the A and B receiver inputs
and the Y and Z driver outputs. By default, the board is fitted
with a 120 Ω resistor, RT, between A and B. This resistor should
be removed if the board is connected to a bus that is already
terminated at both ends. For more information about proper
termination, see the AN-960 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.
Although the ADM2682E/ADM2687E have a built-in receiver
fail-safe for the bus idle condition, there are footprints on the
evaluation board for fitting the R3 and R1 pull-up resistors to
VISO on A and Y, as well as the R4 and R2 pull-down resistors
to GND on B and Z. These resistors can be fitted if the user is
connecting to other parts that require such external biasing resis-
tors on the bus. The exact value required for a 200 mV minimum
differential voltage in the bus idle condition depends on the supply
voltage (for example, 960 ꢀ for 3.3 V and 1440 ꢀ for 5 V).
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
Layers
1 to 2
2 to 3
3 to 4
4 to 5
5 to 6
Thickness of Space Between Layers (mm)
0.1016
0.2032
0.2032
0.2032
0.1016
For more information about the bus idle fail-safe, see the AN-960
Application Note, RS-485/RS-422 Circuit Implementation Guide.
Rev. 0 | Page 4 of 12
Evaluation Board User Guide
UG-317
EVALUATION BOARD SCHEMATICS
Figure 3. Schematics of the ADM2682E/ADM2687E Evaluation Board
Rev. 0 | Page 5 of 12
UG-317
Evaluation Board User Guide
ASSEMBLY DRAWINGS AND BOARD LAYOUT
Figure 4. Top Layer
Figure 5. Silkscreen
Figure 6. Internal Layer 2
Rev. 0 | Page 6 of 12
Evaluation Board User Guide
UG-317
Figure 7. Internal Layer 3
Figure 8. Internal Layer 4
Figure 9. Internal Layer 5
Rev. 0 | Page 7 of 12
UG-317
Evaluation Board User Guide
Figure 10. Bottom Solder Layer
Rev. 0 | Page 8 of 12
Evaluation Board User Guide
UG-317
ORDERING INFORMATION
BILL OF MATERIALS
Table 3.
Quantity Reference Designator
Description
Supplier
Part No.
4
1
1
1
2
4
1
2
1
1
2
1
1
2
R1, R2, R3, R4
R6
RT
RT1
C1, C9
C2, C6, C7, C8
C3
C4, C5
C10
J1
J2, J3
J4
Resistor, size 0805 (not inserted)
Resistor, 0 Ω, size 0805
Resistor, 120 Ω, size 0805
Resistor, size 0805 (not inserted)
Capacitor, size 0805, 10 μF
Capacitor, size 0805, 100 nF
Capacitor, tantalum, Case C, 22 μF
Capacitor, size 0805, 10 nF
Capacitor, size 0805 (not inserted)
CON\POWER, 2-pin terminal block (5 mm pitch)
PCB SMB jack (square)
CON\POWER6, 6-pin terminal block
CON\POWER4, 4-pin terminal block
4-pin (2 × 2), 2.54 mm header and shorting block
Not inserted
Vishay Draloric
Multicomp
Not inserted
AVX
Multicomp
AVX
AVX
Not inserted
Camden Electronics
Multicomp
Camden Electronics
Camden Electronics
Harwin
Not inserted
CRCW08050000Z0EA
MC 0.1W 0805 1%
Not inserted
0805ZD106KAT2A
MCCA000274
TAJC226K016RNJ
08053C103KAT2A
Not inserted
CTB5000/2
24-14-2-TGG
CTB5000/6
CTB5000/4
J8
LK1, LK4
M20-9953646 and
M7566-05
1
1
2
1
LK2
8-pin (4 × 2), 2.54 mm header and shorting block
6-pin (3 × 2), 2.54 mm header and shorting block
2-pin (1 × 2), 2.54 mm header and shorting block
Harwin
Harwin
Harwin
M20-9953646 and
M7566-05
M20-9953646 and
M7566-05
M20-9953646 and
M7566-05
ADM2682EBRIZ or
ADM2687EBRIZ
LK3
LK5, LK6
U1
16-lead, wide body SOIC with increased creepage Analog Devices
2
2
8
GND1, GND2
VCC, VISO
RXD, RE, DE, TXD, A, B, Z, Y Test point, yellow
Test point, black
Test point, red
Vero Technologies
Vero Technologies
Vero Technologies
20-2137
20-313137
20-313140
RELATED LINKS
Resource
Description
ADM2682E
ADM2687E
AN-960
16 Mbps, 5 kV rms Signal and Power Isolated RS-485 Transceiver with 15 kV ESD Protection
500 kbps, 5 kV rms Signal and Power Isolated RS-485 Transceiver with 15 kV ESD Protection
RS-485/RS-422 Circuit Implementation Guide
AN-0971
Recommendations for Control of Radiated Emissions with isoPower Devices
Rev. 0 | Page 9 of 12
UG-317
NOTES
Evaluation Board User Guide
Rev. 0 | Page 10 of 12
Evaluation Board User Guide
NOTES
UG-317
Rev. 0 | Page 11 of 12
UG-317
NOTES
Evaluation Board User Guide
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 property of their respective owners.
UG10174-0-10/11(0)
Rev. 0 | Page 12 of 12
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