Evaluation Board User Guide
UG-239
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
ADM2483
Half-Duplex
iCoupler
Isolated RS-485
Transceiver
FEATURES
RS-485 transceiver with electrical data isolation
500 kbps data rate
Slew rate-limited driver outputs
Suitable for 5 V or 3 V operation on V
DD1
Suitable for 5 V operation on V
DD2
V
IORM
= 560 V peak
256 nodes on bus
GENERAL DESCRIPTION
The EVAL-ADM2483EBZ allows easy and quick evaluation of
the isolated
ADM2483
RS-485 transceiver. The evaluation board
allows all of the input and output functions to be exercised
without the need for external components.
The
ADM2483
differential bus transceiver is an integrated,
galvanically isolated component designed for bidirectional data
communication on balanced, multipoint bus transmission lines.
Using Analog Devices, Inc.,
iCoupler®
technology, the
ADM2483
combines a 3-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 3 V supply,
and the bus side uses only a 5 V supply.
ADM2483 APPLICATIONS
Low power RS-485/RS-422 networks
Isolated interfaces
Industrial field networks
Multipoint data transmission systems
EVALUATION KIT CONTENTS
EVAL–ADM2483EBZ
EVALUATION BOARD DIGITAL PHOTOGRAPH
Figure 1.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 8
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TABLE OF CONTENTS
Features .............................................................................................. 1
ADM2483 Applications ................................................................... 1
Evaluation Kit Contents................................................................... 1
General Description ......................................................................... 1
Evaluation Board Digital Photograph............................................ 1
Revision History ............................................................................... 2
Evaluation Board User Guide
Evaluation Board Configurations ...................................................3
Setting Up the Evaluation Board.................................................3
Evaluation Board Schematic and Artwork.....................................4
Ordering Information.......................................................................6
Bill of Materials..............................................................................6
Related Links......................................................................................6
REVISION HISTORY
6/11—Revision 0: Initial Version
Rev. 0 | Page 2 of 8
Evaluation Board User Guide
EVALUATION BOARD CONFIGURATIONS
SETTING UP THE EVALUATION BOARD
The EVAL-ADM2483EBZ allows the isolated
ADM2483
RS-485 transceivers 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 receiver input.
This can be removed if the board is connected to a bus already
terminated at both ends. The value of the termination resistor
should be equal to the characteristic impedance of the cable used.
UG-239
The logic side is suitable for 5 V or 3 V operation on VDD1.
There is a 0.1 μF decoupling capacitor, C1, fitted between VDD1
and GND1. The bus side is suitable for 5 V operation on VDD2.
There is a 0.1 μF decoupling capacitor, C2, fitted between VDD2
and GND2.
If fail-safe biasing is required for other parts on the bus that do not
have the offset receiver threshold of the ADM2483, bus biasing
resistors can be fitted on the receiver input by inserting R1 and R2.
Refer to
AN-960 Application Note,
RS-485/RS-422 Circuit
Implementation Guide,
for an explanation of bus termination
and fail-safe biasing.
Rev. 0 | Page 3 of 8
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EVALUATION BOARD SCHEMATIC AND ARTWORK
Evaluation Board User Guide
Figure 2. EVAL-ADM2483EBZ Evaluation Board Circuit Diagram
DE/RTS
DE/RTS
Figure 3. EVAL-ADM2483EBZ Evaluation Board Silkscreen
Figure 4. EVAL-ADM2483EBZ Evaluation Board Component Side
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Evaluation Board User Guide
UG-239
Figure 5. EVAL-ADM2483EBZ Evaluation Board Solder Side
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