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User's Guide

SLLU128A–June 2010–Revised August 2010

Sympol™ Transceiver

This manual describes the SN65HVD96 Evaluation Module (EVM). This EVM helps designers evaluate

the device performance under wire-fault and common-mode conditions, thus supporting the fast

development and analysis of data transmission systems using SN65HVD96 transceivers.

Contents

1 Overview ..................................................................................................................... 2

2 EVM Set-up and Precautions ............................................................................................. 2

3 Powering up the EVM and Taking Measurements ..................................................................... 4

3.1 Measurement Examples .......................................................................................... 4

List of Figures

1 Block Diagram and Sympol™ Signal States ............................................................................ 2

2 EVM Schematic ............................................................................................................. 3

3 Bridging DUT_GND with EART_GND.................................................................................... 3

4 Example for Stimulus and Probe Points with JMP4 and JMP14 ..................................................... 4

5 Transceiver Configuration for Normal Operation ....................................................................... 5

6 EVM Set-up for Normal Transceiver Operation......................................................................... 5

7 Configuration for Maximum Loading...................................................................................... 6

8 EVM Set-up for Maximum Loading ....................................................................................... 6

9 Wire-fault Simulation Using two EVMs................................................................................... 7

10 EVM Configurations: Left as Receiver EVM, Right as Transmitter EVM ............................................ 7

11 Sympol™ Signaling at 500 kbps Over 1 Meter Cable ................................................................. 8

12 Sympol™ Signaling is Unaffected by Common-Mode Voltage ....................................................... 8

13 Sympol™ Signaling is Unaffected by Cross-wire Fault ................................................................ 8

14 Top View of SN65 HVD96 EVM .......................................................................................... 9

15 Bottom View of SN65 HVD96 EVM ...................................................................................... 9

Sympol is a trademark of Texas Instruments.

SLLU128A–June 2010–Revised August 2010 Sympol™ Transceiver

Summary of content (11 pages)

PAGE 1
User's Guide SLLU128A – June 2010 – Revised August 2010 Sympol™ Transceiver This manual describes the SN65HVD96 Evaluation Module (EVM). This EVM helps designers evaluate the device performance under wire-fault and common-mode conditions, thus supporting the fast development and analysis of data transmission systems using SN65HVD96 transceivers. 1 2 3 Contents Overview .....................................................................................................................
PAGE 2
Overview 1 www.ti.com Overview The SN65HVD96 is designed for error-free data transmission under wire-fault conditions. The receiver provides correct output data whether the bus wires are connected normally or cross-wired. This feature is known as symmetric-polarity ( Sympol™) and is auto-detected internally, so no intervention from the controller or the operator is required (see Figure 1).
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EVM Set-up and Precautions www.ti.com R11 R10 VCC 0W GND 1 2 3 EARTH JMP12 1 2 3 R2 50 W n.a. JMP3 VCC DE 3 4 C4 1mF C5 0.1mF C12 n.a. C13 n.a. JMP13 1 2 3 U1 1 2 3 4 R RE DE D VCC B A GND R6 n.a. C1 1 mF 8 7 6 5 B R5 120 W C7 n.a. R7 n.a. R3 50 W n.a. JMP6 1 2 3 4 A VCM_A D JMP14 1 2 3 R4 50 W n.a.
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Powering up the EVM and Taking Measurements www.ti.com Signal Generator Scope 5V Ch1 Ch2 JMP4 1 2 3 4 VCC JMP14 1 2 3 D - input of SN65HVD95 Figure 4. Example for Stimulus and Probe Points with JMP4 and JMP14 Figure 4 gives an example for entering a data signal into the driver section of the Sympol™ transceiver. The signal output of the generator is adjusted to 5V. The generator’s ground terminal is connected with pin 3, and the signal output terminal with pin 2 of JMP4.
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Powering up the EVM and Taking Measurements www.ti.com DUT_VCC U1 Receive data 0V 5V Transmit data R 1 8 Vcc RE 2 7 B R8 B 0W R5 120 W DE 3 6 A D 4 5 GND B VOD R9 A VB 0W A VA Figure 5. Transceiver Configuration for Normal Operation Figure 6 shows the corresponding EVM set-up.
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Powering up the EVM and Taking Measurements www.ti.com DUT_VCC U1 Receive data R 8 1 Vcc R8 B RE 0V 5V Transmit data 2 7 B R5 60 W DE 3 6 A D 4 5 GND 375 W VOD R9 A 375 W VCM = -7V to +12V Figure 7.
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Powering up the EVM and Taking Measurements www.ti.com DUT_VCC DUT_VCC U1 Receive data U1 R 1 8 RE 2 7 B DE 3 6 A D 4 5 GND Vcc B 0V 0V R5 V 120 W OD A R8 R8 0W 0W R9 R9 0W 0W Vcc 8 1 R B 7 2 RE A 6 3 DE GND 5 4 D B R5 120 W A 5V 5V Transmit data Figure 9. Wire-fault Simulation Using two EVMs Figure 10 illustrates the EVM configurations and the measurement set-up. The right evaluation module (EVM2) is configured as the driver.
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Powering up the EVM and Taking Measurements www.ti.com D 5V/Div VA VB 2V/Div R 5V/Div 1us/Div Figure 11. Sympol™ Signaling at 500 kbps Over 1 Meter Cable D 10V/Div 5V/Div VA VB R 5V/Div 1us/Div Figure 12. Sympol™ Signaling is Unaffected by Common-Mode Voltage D 5V/Div VB VA 2V/Div R 5V/Div 1us/Div Figure 13.
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Powering up the EVM and Taking Measurements www.ti.com Figure 14. Top View of SN65 HVD96 EVM Figure 15. Bottom View of SN65 HVD96 EVM For detailed information on the device parameters see the SN65HVD96 data sheet (Lit.# SLLSE35).
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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.
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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.