ANALOG DEVICES UG-496 Evaluation Board User Guide

Evaluation Board User Guide
UG-496
Evaluating the ADM2490E—5 kV, Signal Isolated, High Speed, 16 Mbps,
ESD Protected, Full Duplex, iCoupler, Isolated RS-485 Transceiver

FEATURES

Full duplex, isolated RS-485/RS-422 transceivers
Suitable for 5 V or 3 V operation on VDD1
Suitable for 5 V operation on VDD2
16 Mbps data rate
32 nodes on bus

APPLICATIONS

Isolated RS-485/RS-422 interfaces
INTERBUS
Industrial field networks
Multipoint data transmission systems
EVALUATION KIT CONTENTS
EVAL–ADM2490EEBZ

GENERAL DESCRIPTION

The EVAL-ADM2490EEBZ allows the isolated ADM2490E RS-485 transceiver to be easily and quickly evaluated. The evaluation board allows all of the input and output functions to be exercised without the need for external components.
The ADM2490E differential bus transceiver is an integrated, galvanically isolated component designed for bidirectional data communication on multipoint bus transmission lines.
The device uses Analog Devices, Inc., iCoupler® technology to combine a 2-channel isolator, a three-state differential line driver, and a differential input receiver into a single package.
The logic side of the device is powered with either a 5 V or a 3 V supply, and the bus side uses an isolated 5 V supply.

EVALUATION BOARD PHOTOGRAPH

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS.

REVISION HISTORY
2/13—Revision 0: Initial Version

EVALUATION BOARD CONFIGURATIONS

SETTING UP THE EVALUATION BOARD
The E VA L -ADM2490EEBZ allows the isolated ADM2490E RS-485 transceiver to be easily and quickly evaluated. The evaluation board allows all of the input and output functions to be exercised without the need for external components.
A termination resistor (RT) of 120 Ω is fitted on the receiving side of the transceiver, along with a pull-up resistor of 1.3 kΩ onthe noninverting side and a pull-down resistor of 1.3 kΩ on the inverting side for fail-safe operation.
The logic side is suitable for 5 V or 3 V operation on VDD1. There are two 100 nF decoupling capacitors (C1 and C2) fitted between VDD1 and GND1 and between VDD2 and GND2, respectively. The bus side is suitable for 5 V operation on VDD2. See Figure 2.
Refer to the AN-960 Application Note, RS-485/RS-422 Circuit Implementation Guide, for an explanation of bus termination and fail-safe biasing.
To set up the evaluation board for testing, the connections described in Table 1 must be made between two evaluation boards. TxD and RxD serve as the transmitting and receiving lines, respectively.

Table 1. Evaluation Board Connections

Screw Terminal Board 1
Y
Z
A
B| Noninverting output
Inverting output
Noninverting input
Inverting input
Screw Terminal Board 2
A
B
Y
Z| Noninverting input
Inverting input
Noninverting output
Inverting output

EVALUATION BOARD SCHEMATIC AND ARTWORK

BILL OF MATERIALS

Table 2.

1
2
3
2
3
1
1
2
2
2
4| R1
R3, R4
R2, R5, R6
C1, C2
J1, J2, J3
J4
U1
GND1, GND2
VDD1, VDD2
RxD, TxD
A, B, Z, Y| Resistor, 120 Ω, 0805
Resistor, 1.3 kΩ, 0805
Resistor, 0805
Capacitor, Size 0603, 100 nF
Connector/power, 2-pin terminal block
(5 mm pitch)
Connector/Power 4, 4-pin terminal block
16-lead wide body SOIC
Test point, black
Test point, red
Test point, yellow
Test point, green| Tyco Electronics Connectivity/Neohm/CPF0603B120RE1
Tyco Electronics Connectivity/Neohm/CPF0603B1K3E1
Do not insert
AVX Corporation/06033G104ZAT2A
Lumberg/KRM 02
Lumberg/KRM 04
Analog Devices/ADM2490EBRWZ
Vero Technologies/20-2137
Vero Technologies/20-313137
Vero Technologies/20-313140
Vero Technologies/20-313138

RELATED LINKS

ADM2490E
AN-960| Product Page: 5 kV Signal Isolated, High Speed (16 Mbps), ESD Protected, Full Duplex RS-485 Transceiver
Application Note: RS-485/RS-422 Circuit Implementation 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.

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UG11163-0-2/13(0)

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• Tel: 781.329.4700
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