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UG-543

Evaluation Board User Guide

Rev. 0 | Page 6 of 16

SHIELD

UART Rx

UART Tx

GND

Z
Y

GND

VCC

EVAL-RS485FD8EBZ

3.3V OR 5V

SUPPLY

NOTES

1.REMOVE 50Ω TERMINATION RESISTORS FROM EVALUATION BOARD

2.MAXIMUM NUMBER OF NODES: 32.
3.R

IS EQUAL TO THE CHARACTERISTIC IMPEDANCE OF THE CABLE USED.

MASTER NODE

SLAVE

NODE N

NODE 2

NODE 1

MICROCONTROLLER/

PROCESSOR

1390-

006

Figure 6. Full-Duplex (8-Lead SOIC) RS-485 Board Connected to Bus and Control Board

Содержание EVAL-RS485FD8EBZ

Страница 1: ...ing 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 a...

Страница 2: ...rd Configuration 3 Setting Up the Evaluation Board 3 Input Output Connections 3 Other Board Components 4 Evaluation with Applications 4 Evaluation Board Schematics and Layouts 7 EVAL RS485HDEBZ 7 EVAL RS485FD8EBZ 9 EVAL RS485FDEBZ 11 Ordering Information 13 EVAL RS485HDEBZ Bill of Materials 13 EVAL RS485FD8EBZ Bill of Materials 14 EVAL RS485FDEBZ Bill of Materials 15 Related Links 16 REVISION HIST...

Страница 3: ...owing wire connections to equipment or a UART All boards include connections for data input DI and receiver output RO The half duplex and 14 lead SOIC full duplex evaluation boards also have connections for receiver enable RE and driver enable DE Alternatively these inputs can be driven by jumper connections to VCC and GND and or connected together see Table 2 Connections to an RS 485 bus are made...

Страница 4: ...nimum differential input voltage VID between A and B of 200 mV Different resistor values are required depending on whether a 3 3 V or 5 V supply is used and how much noise margin is required that is VID 200 mV ADM3070E to ADM3078E and ADM4850 to ADM4857 have built in failsafe for the bus idle condition For guidelines refer to AN 960 Application Note RS 485 RS 422 Circuit Implementation Guide EVALU...

Страница 5: ... Z connections should only be connected to other RS 485 receiver inputs as shown in Figure 6 for a multinode bus These full duplex parts without driver or receiver enable inputs can also typically be used in point to point four wire RS 485 bus connections OSCILLOSCOPE A LK2 LK3 B C D A B C SHIELD A RO RE DE DI B Z Y GND RO RE DE DI LK5 LK6 A B Z Y GND J1 J3 J2 VCC EVAL RS485FDEBZ 3 3V OR 5V SUPPLY...

Страница 6: ...SUPPLY NOTES 1 REMOVE 50Ω TERMINATION RESISTORS FROM EVALUATION BOARD 2 MAXIMUM NUMBER OF NODES 32 3 RT IS EQUAL TO THE CHARACTERISTIC IMPEDANCE OF THE CABLE USED RT RT RT RT MASTER NODE SLAVE SLAVE SLAVE A Y Z B NODE N A Y Z B NODE 2 A Y Z B NODE 1 MICROCONTROLLER PROCESSOR 11390 006 J3 Figure 6 Full Duplex 8 Lead SOIC RS 485 Board Connected to Bus and Control Board ...

Страница 7: ...Evaluation Board User Guide UG 543 Rev 0 Page 7 of 16 EVALUATION BOARD SCHEMATICS AND LAYOUTS EVAL RS485HDEBZ 11390 007 Figure 7 EVAL RS485HDEBZ Schematic ...

Страница 8: ...UG 543 Evaluation Board User Guide Rev 0 Page 8 of 16 11390 008 Figure 8 EVAL RS485HDEBZ Silkscreen 11390 009 Figure 9 EVAL RS485HDEBZ Component Side 11390 010 Figure 10 EVAL RS485HDEBZ Solder Side ...

Страница 9: ...Evaluation Board User Guide UG 543 Rev 0 Page 9 of 16 EVAL RS485FD8EBZ 11390 011 Figure 11 EVAL RS485FD8EBZ Schematic ...

Страница 10: ...G 543 Evaluation Board User Guide Rev 0 Page 10 of 16 11390 012 Figure 12 EVAL RS485FD8EBZ Silkscreen 11390 013 Figure 13 EVAL RS485FD8EBZ Component Side 11390 014 Figure 14 EVAL RS485FD8EBZ Solder Side ...

Страница 11: ...Evaluation Board User Guide UG 543 Rev 0 Page 11 of 16 EVAL RS485FDEBZ 11390 015 Figure 15 EVAL RS485FDEBZ Schematic ...

Страница 12: ...UG 543 Evaluation Board User Guide Rev 0 Page 12 of 16 11390 016 Figure 16 EVAL RS485FDEBZ Silkscreen 11390 017 Figure 17 EVAL RS485FDEBZ Component Side 11390 018 Figure 18 EVAL RS485FDEBZ Solder Side ...

Страница 13: ...win M7566 05 2 LK3 LK4 Jumper Block 2 pin 0 1 spacing Harwin M20 9990246 and Harwin M7566 05 2 R1 R2 Not placed optional Not applicable 1 R3 Resistor 0 Ω 0805 Vishay Draloric CRCW08050000Z0EA 2 RT1 RT2 Resistor 120 Ω 0805 Multicomp MC 0 1W 0805 1 120R 1 U1 8 lead SOIC not placed Analog Devices Inc see Table 4 1 VCC Test point red Vero Technologies 20 313137 Table 4 EVAL RS485HDEBZ Options for U1 H...

Страница 14: ...d Harwin M7566 05 2 R1 R2 Not placed optional Not applicable 1 R3 Resistor 0 Ω 0805 Vishay Draloric CRCW08050000Z0EA 2 RT1 RT2 Resistor 120 Ω 0805 Multicomp MC 0 1W 0805 1 120R 1 U1 8 lead SOIC not placed Analog Devices see Table 6 1 VCC 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 Enhanced ...

Страница 15: ...0 1 header and shorting block Harwin M20 9953646 and Harwin M7566 05 2 LK5 LK6 Jumper Block 2 pin 0 1 spacing Harwin M20 9990246 and Harwin M7566 05 2 R1 R2 Not placed optional Not applicable 1 R3 Resistor 0 Ω 0805 Vishay Draloric CRCW08050000Z0EA 2 RT1 RT2 Resistor 120 Ω 0805 Multicomp MC 0 1W 0805 1 120R 1 U1 14 lead SOIC not placed Analog Devices see Table 8 1 VCC Test point red Vero Technologi...

Страница 16: ...he 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 ...

Страница 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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