Analog Devices EVAL-RS485HDEBZ User Manual
Analog Devices EVAL-RS485HDEBZ User Manual

Analog Devices EVAL-RS485HDEBZ User Manual

Evaluation boards for full-duplex and half-duplex rs-485 transceivers in 8-lead/14-lead soic packages

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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 Boards for Full-Duplex and Half-Duplex RS-485 Transceivers

FEATURES

Easy evaluation of half- and full-duplex RS-485 transceivers
Board layouts for standard RS-485 SOIC footprints
8-lead, SOIC, half-duplex RS-485 (EVAL-RS485HDEBZ)
8-lead, SOIC, full-duplex RS-485 (EVAL-RS485FD8EBZ)
14-lead, SOIC, full-duplex RS-485 (EVAL-RS485FDEBZ)
Power/ground connections through screw terminal blocks
Screw terminal blocks for logic I/O and RS-485 signals
Jumper selectable enable/disable for RE and DE
Test points for measuring all signals
Resistors and footprints for termination and biasing
networks

APPLICATIONS

Full- and half-duplex RS-485 transceiver evaluation

EVALUATION KIT CONTENTS

1

EVAL-RS485HDEBZ

or
1

EVAL-RS485FD8EBZ

or
1

EVAL-RS485FDEBZ

(Main device available separately when ordering)

GENERAL DESCRIPTION

The EVAL-RS485HDEBZ, EVAL-RS485FD8EBZ, and
EVAL-RS485FDEBZ
allow quick and easy evaluation of RS-485
transceivers with standard SOIC footprints. The evaluation
board allows all of the input and output functions to be
exercised without the need for external components. Screw
terminal blocks provide convenient connections for power and
ground, digital I/O, and RS-485 signals.
The
EVAL-RS485HDEBZ
evaluation board has a footprint for
a half-duplex RS-485 transceiver in an 8-lead SOIC package.
The
EVAL-RS485FD8EBZ
evaluation board has a footprint for
a full-duplex RS-485 transceiver in an 8-lead SOIC package.
The
EVAL-RS485FDEBZ
evaluation board has a footprint for a
full-duplex RS-485 transceiver in a 14-lead SOIC package.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
in 8-lead/14-lead SOIC Packages
Rev. 0 | Page 1 of 16
Evaluation Board User Guide
EVAL-RS485HDEBZ
Figure 1.
EVAL-RS485FD8EBZ
Figure 2.
EVAL-RS485FDEBZ
Figure 3.
UG-543

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Summary of Contents for Analog Devices EVAL-RS485HDEBZ

  • Page 1: Features

    FEATURES EVAL-RS485HDEBZ Easy evaluation of half- and full-duplex RS-485 transceivers Board layouts for standard RS-485 SOIC footprints 8-lead, SOIC, half-duplex RS-485 (EVAL-RS485HDEBZ) 8-lead, SOIC, full-duplex RS-485 (EVAL-RS485FD8EBZ) 14-lead, SOIC, full-duplex RS-485 (EVAL-RS485FDEBZ) Power/ground connections through screw terminal blocks Screw terminal blocks for logic I/O and RS-485 signals...
  • Page 2: Table Of Contents

    EVAL-RS485FDEBZ ..............11 EVAL-RS485FDEBZ................. 1 Ordering Information ..............13 Revision History ................2 EVAL-RS485HDEBZ Bill of Materials ........13 Evaluation Board Configuration ............ 3 EVAL-RS485FD8EBZ Bill of Materials ........14 Setting Up the Evaluation Board ..........3 EVAL-RS485FDEBZ Bill of Materials ........15 Input/Output Connections ............
  • Page 3: Evaluation Board Configuration

    ( RE ) and driver enable (DE). Alternatively, these inputs can be driven by jumper connections to VCC and GND and/or To use the EVAL-RS485HDEBZ, fit an 8-lead SOIC half-duplex connected together (see Table 2). transceiver to the footprint in the center of the board. For the...
  • Page 4: Other Board Components

    ) between A and B of 200 mV. Different resistor values are required depending on whether LK4 has been removed on each EVAL-RS485HDEBZ board in a 3.3 V or 5 V supply is used, and how much noise margin is order to ensure both ends of the bus have only a 120 Ω...
  • Page 5 OSCILLOSCOPE EVAL-RS485FDEBZ SHIELD Figure 4. Full-Duplex RS-485 Transceiver Loop Back Test SIGNAL 3.3V OR 5V GENERATOR SUPPLY EVAL-RS485HDEBZ SHIELD OSCILLOSCOPE 3.3V OR 5V SUPPLY EVAL-RS485HDEBZ SHIELD Figure 5. Half-Duplex RS-485 Two Board Point-to-Point Test Rev. 0 | Page 5 of 16...
  • Page 6 UG-543 Evaluation Board User Guide 3.3V OR 5V SUPPLY EVAL-RS485FD8EBZ MASTER NODE UART Rx MICROCONTROLLER/ PROCESSOR UART Tx SHIELD SLAVE SLAVE SLAVE NODE 1 NODE 2 NODE N NOTES 1.REMOVE 50Ω TERMINATION RESISTORS FROM EVALUATION BOARD 2.MAXIMUM NUMBER OF NODES: 32. IS EQUAL TO THE CHARACTERISTIC IMPEDANCE OF THE CABLE USED.
  • Page 7: Evaluation Board Schematics And Layouts

    Evaluation Board User Guide UG-543 EVALUATION BOARD SCHEMATICS AND LAYOUTS EVAL-RS485HDEBZ Figure 7. EVAL-RS485HDEBZ Schematic Rev. 0 | Page 7 of 16...
  • Page 8 UG-543 Evaluation Board User Guide Figure 8. EVAL-RS485HDEBZ Silkscreen Figure 9. EVAL-RS485HDEBZ Component Side Figure 10. EVAL-RS485HDEBZ Solder Side Rev. 0 | Page 8 of 16...
  • Page 9: Eval-Rs485Fd8Ebz

    Evaluation Board User Guide UG-543 EVAL-RS485FD8EBZ Figure 11. EVAL-RS485FD8EBZ Schematic Rev. 0 | Page 9 of 16...
  • Page 10 UG-543 Evaluation Board User Guide Figure 12. EVAL-RS485FD8EBZ Silkscreen Figure 13. EVAL-RS485FD8EBZ Component Side Figure 14. EVAL-RS485FD8EBZ Solder Side Rev. 0 | Page 10 of 16...
  • Page 11: Eval-Rs485Fdebz

    Evaluation Board User Guide UG-543 EVAL-RS485FDEBZ Figure 15. EVAL-RS485FDEBZ Schematic Rev. 0 | Page 11 of 16...
  • Page 12 UG-543 Evaluation Board User Guide Figure 16. EVAL-RS485FDEBZ Silkscreen Figure 17. EVAL-RS485FDEBZ Component Side Figure 18. EVAL-RS485FDEBZ Solder Side Rev. 0 | Page 12 of 16...
  • Page 13: Ordering Information

    Resistor, 0 Ω, 0805 Vishay Draloric/CRCW08050000Z0EA RT1, RT2 Resistor, 120 Ω, 0805 Multicomp/MC 0.1W 0805 1% 120R 8-lead SOIC (not placed) Analog Devices, Inc./see Table 4 Test point, red Vero Technologies/20-313137 Table 4. EVAL-RS485HDEBZ Options for U1(Half-Duplex RS-485 Transceivers) Enhanced ESD, 3.3 V Supply Enhanced ESD, 5 V Supply Standard, 3.3 V Supply...
  • Page 14: Eval-Rs485Fd8Ebz Bill Of Materials

    Resistor, 0 Ω, 0805 Vishay Draloric/CRCW08050000Z0EA RT1, RT2 Resistor, 120 Ω, 0805 Multicomp/MC 0.1W 0805 1% 120R 8-lead SOIC (not placed) Analog Devices/see Table 6 Test point, red Vero Technologies/20-313137 Table 6. EVAL-RS485FD8EBZ Options for U1(Full-Duplex RS-485 Transceivers, 8-Lead SOIC) Enhanced ESD, 3.3 V Supply...
  • Page 15: Eval-Rs485Fdebz Bill Of Materials

    Resistor, 0 Ω, 0805 Vishay Draloric/CRCW08050000Z0EA RT1, RT2 Resistor, 120 Ω, 0805 Multicomp/MC 0.1W 0805 1% 120R 14-lead SOIC (not placed) Analog Devices/see Table 8 Test point, red Vero Technologies/20-313137 Table 8. EVAL-RS485FDEBZ Options for U1(Full-Duplex RS-485 Transceivers, 14-Lead SOIC) Enhanced ESD, 3.3 V Supply...
  • Page 16: Related Links

    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.
  • Page 17 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. EVAL-RS485HDEBZ EVAL-RS485FDEBZ EVAL-RS485FD8EBZ...

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