Texas Instruments ISO1176T User Manual
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Texas Instruments ISO1176T User Manual

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This document describes the ISO1176T/35T/3086T Evaluation Module (EVM). It is used to evaluate the
ISO1176T PROFIBUS™ Transceiver, the ISO35T RS-485 Transceiver, or the ISO3086T RS-485
Transceiver. Because the devices are similar transceivers, and the printed-circuit board is the same for all
three EVMs, this manual can be used for all three devices.
The EVM can be used to evaluate device parameters while acting as a guide for board layout. The board
allows for the connection of 50-Ω coaxial cables via QuietZone connectors. It also provides easy
connection points for oscilloscope probes. Banana jacks are provided for connection of a dc power supply.
These features provide the designer with a tool for evaluation and the successful design of an
end-product.
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SLLU122A - April 2010 - Revised July 2010
ISO1176T/35T/3086T Evaluation Module
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List of Figures
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List of Tables
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Copyright © 2010, Texas Instruments Incorporated
SLLU122A - April 2010 - Revised July 2010
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ISO1176T/35T/3086T Evaluation Module
User's Guide
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Summary of Contents for Texas Instruments ISO1176T

  • Page 1: Table Of Contents

    SLLU122A – April 2010 – Revised July 2010 ISO1176T/35T/3086T Evaluation Module This document describes the ISO1176T/35T/3086T Evaluation Module (EVM). It is used to evaluate the ISO1176T PROFIBUS™ Transceiver, the ISO35T RS-485 Transceiver, or the ISO3086T RS-485 Transceiver. Because the devices are similar transceivers, and the printed-circuit board is the same for all three EVMs, this manual can be used for all three devices.

  • Page 2: Overview

    The EVMs allow the user to evaluate half-duplex point-to-point or multidrop (PROFIBUS) systems, or multipoint (RS-485) applications using multiple EVMs. The ISO1176T meets or exceeds the requirements of EN50170 and the ISO35T and ISO3086T meet or exceed the requirements of TIA/EIA RS-485 while providing 4000 V of isolation between the Data/Control and Bus sides of the device.

  • Page 3: Iso1176T Device Pinout And Block Diagram

    (TOP VIEW) GND 2 GND 2 GND 1 GND 2 ISODE ISODE GND 2 Figure 1. ISO1176T Device Pinout and Block Diagram DW PACKAGE function diagram (TOP VIEW) GND 2 GND 1 GND 2 GND 2 Figure 2. ISO35T Device Pinout and Block Diagram...
  • Page 4 (i.e., EMI-rich) environment. This was accomplished by increasing the minimum differential voltage on the bus. The ISO1176T has been designed specifically for these types of environments. The two standards are indeed very similar.

  • Page 5: Iso1176T/35T/3086Tevm Board

    Figure 4. ISO1176T/35T/3086TEVM Board Configurations The ISO1176T/35T/3086TEVM board allows the user to evaluate performance of any of the three devices, or to connect easily to an existing PROFIBUS or RS-485 bus to evaluate system performance in an existing system. Also, multiple EVMs can be obtained to allow the user to construct various bus configurations.

  • Page 6: Point-To-Point Simplex Circuit

    32 unit loads on the line. The ISO1176T device allows the total number of nodes to be increased because ISO1176T represents just 1/5 of a unit load. This allows up to 160 nodes to be connected onto a single bus.

  • Page 7: Five-Node Multipoint Circuit

    3. Induce a ground offset by varying the output of PS3. WARNING PS3 output must not exceed +12 V to -7 V to remain within the device ratings. SLLU122A – April 2010 – Revised July 2010 ISO1176T/35T/3086T Evaluation Module Copyright © 2010, Texas Instruments Incorporated...

  • Page 8: Recommended Equipment

    ISO1176TEVM. Table 2 contains the same information for the full-duplex ISO35TEVM and ISO3086TEVM. Table 1. EVM Configuration Options for ISO1176T Jumper Function Configuration I/O Load DATA/CONTROL SIDE JUMPERS JMP1 –...

  • Page 9: Evm Configuration Options For Iso35T And Iso3086T

    Recommended Equipment www.ti.com Table 1. EVM Configuration Options for ISO1176T (continued) Jumper Function Configuration I/O Load JMP22 – RE Test Point R11 – Uninstalled JMP23 – DE Test Point JMP24 – D Test Point JMP30 – D2 Connects D2 output to transformer...

  • Page 10: Iso1176Tevm Bill Of Material

    JMP32 – Regulator Output Connects regulator output to Vcc2. Remove this jumper when connecting power externally (regulator not In use) Bill of Materials The items used in the ISO1176T/35T/3086TEVM are listed in the bill of materials in Table Table 4, and Table Table 3.

  • Page 11: Iso35Tevm Bill Of Materials

    R2, R3, R4, R7, R8 49.9 r0805 r0805 R9, R11 r0805 DA2304_AL Coil Craft DA2304-AL ISO3086T 16 pin DW ISO3086T LP2985A-50DBVR SOT23-5 LP2985A-50DBVR SLLU122A – April 2010 – Revised July 2010 ISO1176T/35T/3086T Evaluation Module Copyright © 2010, Texas Instruments Incorporated...

  • Page 12: Pcb Top Layer

    These are split planes to keep the Vcc1/GND1 separate from Vcc2/GND2. The I/O traces are designed to have a characteristic impedance of 50 Ω. Figure 10. PCB Top Layer ISO1176T/35T/3086T Evaluation Module SLLU122A – April 2010 – Revised July 2010 Copyright © 2010, Texas Instruments Incorporated...

  • Page 13: Silk Screen - Top Side

    Recommended Equipment www.ti.com Figure 11. Silk Screen – Top Side SLLU122A – April 2010 – Revised July 2010 ISO1176T/35T/3086T Evaluation Module Copyright © 2010, Texas Instruments Incorporated...

  • Page 14: Signal Traces - Bottom Layer

    Recommended Equipment www.ti.com Figure 12. Signal Traces – Bottom Layer ISO1176T/35T/3086T Evaluation Module SLLU122A – April 2010 – Revised July 2010 Copyright © 2010, Texas Instruments Incorporated...

  • Page 15: Silkscreen - Bottom Layer

    Recommended Equipment www.ti.com Figure 13. Silkscreen – Bottom Layer SLLU122A – April 2010 – Revised July 2010 ISO1176T/35T/3086T Evaluation Module Copyright © 2010, Texas Instruments Incorporated...
  • Page 16 Header 3x1 Header 3x1 Header 3x1 DA2303-AL DA2304-AL 49.9 49.9 GND1 JMP4 JMP4 JMP24 JMP24 Title Title Title ISO1176T/35T/3086T EVM ISO1176T/35T/3086T EVM ISO1176T/35T/3086T EVM Size Size Size Document Number Document Number Document Number 6510416 6510416 6510416 <RevCode <RevCode <RevCode Date:...
  • Page 17 Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.

  • Page 18: Important Notice

    IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.

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Iso3086tIso35t

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