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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 Board for the ADM2485 Half-Duplex, Isolated RS-485 Transceiver with
FEATURES
Easy evaluation of the
ADM2485
Evaluation of the
ADM2485
Easy evaluation of integrated transformer driver
ADM2485 APPLICATIONS
Isolated RS-485/RS-422 interfaces
Process field bus (PROFIBUS) networks
Industrial field networks
Multipoint data transmission systems
EVALUATION KIT CONTENTS
EVAL-ADM2485EB3Z or
EVAL-ADM2485EB5Z
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Transformer Driver
at 16 Mbps
EVALUATION BOARD
Evaluation Board User Guide
GENERAL DESCRIPTION
The
ADM2485
RS-485 transceiver to be quickly and easily evaluated. The
evaluation board allows all of the input and output functions to
be exercised without the need for external components.
When the
ADM2485
transformer, TI, is required with a turns ratio of 1:2.2
(DA2304_AL) to step up the 3.3 V to 6 V. This ensures that
there is enough headroom for the
regulated 5 V output (EVAL-ADM2485EB3Z).
If the
ADM2485
former, TI, is required with a turns ratio of 1:1.5 (DA2303_AL)
so that there is enough headroom for the
output a regulated 5 V output (EVAL-ADM2485EB5Z).
Figure 1.
Rev. 0 | Page 1 of 12
evaluation board allows the
is powered by 3.3 V on the logic side, a
ADP667
is powered by 5 V on the logic side, a trans-
ADP667
UG-213
ADM2485
isolated
LDO to output a
LDO to
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Related Manuals for Analog Devices UG-213
Summary of Contents for Analog Devices UG-213
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Page 1: Features
Evaluation Board User Guide UG-213 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 ADM2485 Half-Duplex, Isolated RS-485 Transceiver with Transformer Driver FEATURES GENERAL DESCRIPTION... -
Page 2: Table Of Contents
UG-213 Evaluation Board User Guide TABLE OF CONTENTS Features ....................1 5 V Half Duplex with Bus Biasing on Receiver Inputs .....3 ADM2485 Applications ..............1 Powering the Isolated Side (VDD2) ...........3 Evaluation Kit Contents ..............1 Choosing a Transformer ...............3... -
Page 3: Evaluation Board Configurations
Evaluation Board User Guide UG-213 EVALUATION BOARD CONFIGURATIONS 3.3 V HALF DUPLEX WITH BUS BIASING ON A termination resistor can be fitted on the receiver input by inserting RT1. The value of the termination resistor should be RECEIVER INPUTS equal to the characteristic impedance of the cable used. To The EVAL-ADM2485EB3Z board is shipped in a 3.3 V half-duplex... -
Page 4: Evaluation Board Schematic And Artwork
UG-213 Evaluation Board User Guide EVALUATION BOARD SCHEMATIC AND ARTWORK Figure 2. ADM2485 Evaluation Board Schematic Rev. 0 | Page 4 of 12... - Page 5 Evaluation Board User Guide UG-213 Figure 3. ADM2485 Evaluation Board Silkscreen Rev. 0 | Page 5 of 12...
- Page 6 UG-213 Evaluation Board User Guide Figure 4. Evaluation Board Components Rev. 0 | Page 6 of 12...
- Page 7 Evaluation Board User Guide UG-213 Figure 5. ADM2485 Evaluation Board Solder Side Rev. 0 | Page 7 of 12...
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Page 8: Ordering Information
BILL OF MATERIALS Table 2. Name Description Supplier/Part No. ADM2485BRWZ, 16-lead SOIC_W Analog Devices ADM2485BRWZ 3.3 V to 6 V transformer/5 V to 6 V transformer Coilcraft DA2304-AL (3.3 V) and Coilcraft DA2303-AL (5 V) 8-lead SOIC Analog Devices ADP667... - Page 9 Evaluation Board User Guide UG-213 NOTES Rev. 0 | Page 9 of 12...
- Page 10 UG-213 Evaluation Board User Guide NOTES Rev. 0 | Page 10 of 12...
- Page 11 Evaluation Board User Guide UG-213 NOTES Rev. 0 | Page 11 of 12...
- Page 12 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.
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