SN65LVDS20EVM

Translator/Oscillator Buffer Evaluation Module User’s Guide September 2004 HPL-D Interface SLLU086A 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. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. 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Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Amplifiers Applications amplifier.ti.com Audio www.ti.com/audio Data Converters dataconverter.ti.com Automotive www.ti.com/automotive DSP dsp.ti.com Broadband www.ti.com/broadband Interface interface.ti.com Digital Control www.ti.com/digitalcontrol Logic logic.ti.com Military www.ti.com/military Power Mgmt power.ti.com Optical Networking www.ti.com/opticalnetwork Microcontrollers microcontroller.ti.com Security www.ti.com/security Telephony www.ti.com/telephony Video & Imaging www.ti.com/video Wireless www.ti.com/wireless Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright  2004, Texas Instruments Incorporated EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may not meet the technical requirements of the directive. Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM User’s Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact the TI application engineer. Persons handling the product must have electronics training and observe good laboratory practice standards. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright  2004, Texas Instruments Incorporated EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the supply voltage range of 3 V to 3.6 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 125°C. The EVM is designed to operate properly with certain components above 125°C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User’s Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright  2004, Texas Instruments Incorporated Related Documentation From Texas Instruments Preface Read This First About This Manual This EVM user’s guide provides information about the translator/oscillator buffer evaluation module. How to Use This Manual This document contains the following chapters: - Chapter 1 — Introduction - Chapter2 — Bills of Materials and Schematic Information About Cautions and Warnings This book may contain cautions and warnings. This is an example of a caution statement. A caution statement describes a situation that could potentially damage your software or equipment. This is an example of a warning statement. A warning statement describes a situation that could potentially cause harm to you. The information in a caution or a warning is provided for your protection. Please read each caution and warning carefully. Related Documentation From Texas Instruments To obtain a copy of any of the following TI document, call the Texas Instruments Literature Response Center at (800) 477−8924 or the Product Information v Contents Center (PIC) at (972) 644−5580. When ordering, identify this booklet by its title and literature number. Updated documents can also be obtained through our website at www.ti.com. Data Sheet: Literature Number: SN65LVDS16/17/SN65LVP16/17 SLLS625 SN65LVDS18/19/SN65LVP18/19 SLLS624 SN65LVDS20/SN65LVP20 SLLS620 FCC Warning This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. vi Contents Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Evaluation Module U1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Applying an Input to EVM U1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 Observing an EVM U1 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 Evaluation Module U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 Applying an Input to EVM U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 Observing an EVM U2 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1-2 1-2 1-3 1-4 1-4 1-5 2 Bill of Materials and Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Figures 1−1 1−2 Power Connections for Evaluation Module U1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Power Connections for Evaluation Module U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 vii Contents viii Chapter 1 Introduction The translator/oscillator buffer evaluation module (EVM) allows evaluation of the SN65LVDS16/17/18/19/20 and SN65LVP16/17/18/19/20 repeaters/translators/oscillators. This user’s guide provides a brief overview of the EVM, operation instructions, and output results. Topic Page 1.1 Evaluation Module U1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 Applying an Input to EVM U1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.3 Observing an EVM U1 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.4 Evaluation Module U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 1.5 Applying an Input to EVM U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 1.6 Observing an EVM U2 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Introduction 1-1 Evaluation Module U1 1.1 Evaluation Module U1 Figure 1−1. Power Connections for Evaluation Module U1 Power Supply 1 + 3.3V − Power Supply 2 + 1.2V − P4 DUT GND P3 EVM GND P2 VCC J2 J1 R5 Uninstalled EVM 50 Ω 50 Ω Matched Cables SMA to SMA J3 Oscilloscope Warning Power jacks P2, P3, and P4 are not insulated on the backside of the EVM. Place the EVM on a nonconductive surface. 1.2 Applying an Input to EVM U1 For the oscillator gain stage/buffer the only requirement is to simply apply power to the EVM. The EVM has a crystal onboard that when powered up supplies a signal to the SN65LVDS16, SN65LVP16, SN65LVDS18, or SN65LVP18 which provides a very clean 155.52 MHz signal at J1 and J2. 1-2 Observing an EVM U1 Output 1.3 Observing an EVM U1 Output The outputs are available at J1 and J2 for direct connection to oscilloscope inputs. Matched length cables must be used when connecting the EVM to a scope to avoid inducing skew between the noninverting (+) and inverting (−) outputs. The three power jacks (P2, P3, and P4) are used to provide power and a ground reference for the EVM. The power connections to the EVM determine the common-mode load to the device. When connecting the EVM outputs directly to oscilloscope inputs, setting of the oscilloscope common-mode offset voltage is required, as the oscilloscope presents low common-mode load impedance to the device. Returning to Figure 1−1, Power Supply 1 is used to provide the required 3.3 V to the EVM. Power Supply 2 is used to offset the EVM ground relative to the DUT ground. The EVM ground is connected to the oscilloscope ground through the returns on SMA connectors J1 and J2. With power applied, the common-mode voltage seen by the SN65LVDS16 or SN65LVDS18 is approximately equal to the reference voltage being used inside the device preventing significant common-mode current to flow. Optimum device setup can be confirmed by adjusting the voltage on Power Supply 2 until its current is minimized. It is important to note that use of the dual supplies, and offsetting the EVM ground relative to the DUT ground are simply steps needed for test and evaluation of devices. Actual designs would include high-impedance receivers, which would not require the setup steps outlined above. LVPECL drivers need a 50-Ω termination to VTT. A modification of Figure 1−1 and the above instructions are used when evaluating a SN65LVP16 or SN65LVP18 with a direct connection to a 50-Ω oscilloscope. With Power Supply 1 in Figure 1−1 set to 3.3 V, Power Supply 2 should be set to 1.3 V (2 V below VCC) to provide the correct termination voltage. Note: Power Supply 2 must be able to sink current. Introduction 1-3 Evaluation Module U2 1.4 Evaluation Module U2 Figure 1−2. Power Connections for Evaluation Module U2 Power Supply 1 + 3.3V − Power Supply 2 + 1.2V − P4 DUT GND P3 EVM GND P2 VCC J5 J6 Pattern Generator Matched Cables SMA to SMA J7 R6 100 Ω R7 Uninstalled EVM J8 50 Ω 50 Ω Matched Cables SMA to SMA J9 Oscilloscope Warning Power jacks P2, P3, and P4 are not insulated on the backside of the EVM. Place the EVM on a nonconductive surface. 1.5 Applying an Input to EVM U2 Inputs should be applied to SMA connectors J5 and J6, while keeping R6 installed. The EVM comes with a 100-Ω termination resistor (R6) installed across the differential inputs for terminating the transmission line. When using a general-purpose signal generator with 50-Ω output impedance, make sure that the signal levels are between 0 V to VCC with respect to P4. VID cannot exceed 2 V. A signal generator such as the Advantest D3186 can simulate LVPECL, LVDS, or CML inputs. LVPECL levels can be obtained with 100-Ω differential input termination by setting the input generator to a common-mode of 0.7 V. 1-4 Observing an EVM U2 Output 1.6 Observing an EVM U2 Output The outputs are available at J8 and J7 for direct connection to oscilloscope inputs. Matched length cables must be used when connecting the EVM to a scope to avoid inducing skew between the noninverting (+) and inverting (−) outputs. The three power jacks (P2, P3, and P4) are used to provide power and a ground reference for the EVM. The power connections to the EVM determine the common-mode load to the device. When connecting the EVM outputs directly to oscilloscope inputs, setting of the oscilloscope common-mode offset voltage is required, as the oscilloscope presents low common-mode load impedance to the device. Returning to Figure 1−2, Power Supply 1 is used to provide the required 3.3 V to the EVM. Power Supply 2 is used to offset the EVM ground relative to the DUT ground. The EVM ground is connected to the oscilloscope ground through the returns on SMA connectors J8 and J7. With power applied, the common-mode voltage seen by the SN65LVDS20, SN65LVDS17, or SN65LVDS19 is approximately equal to the reference voltage being used inside the device preventing significant common-mode current to flow. Optimum device setup can be confirmed by adjusting the voltage on Power Supply 2 until its current is minimized. It is important to note that use of the dual supplies, and offsetting the EVM ground relative to the DUT ground are simply steps needed for test and evaluation of devices. Actual designs would include high-impedance receivers, which would not require the setup steps outlined above. LVPECL drivers need a 50-Ω termination to VTT. A modification of Figure 1−1 and the above instructions are used when evaluating a SN65LVP20, SN65LVP17, or SN65LVP19 with a direct connection to a 50-Ω oscilloscope. With Power Supply 1 in Figure 1−2 set to 3.3 V, Power Supply 2 should be set to 1.3 V (2 V below VCC) to provide the correct termination voltage. Note: Power Supply 2 must be able to sink current. Introduction 1-5 1-6 Chapter 2 Bill of Materials and Schematic This chapter contains the bill of materials and schematic. Topic Page 2.1 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Bill of Materials and Schematic 2-1 Bill of Materials 2.1 Bill of Materials 2-2 Item Quantity −1 Quantity −2 1 1 − C1 0.01 µF ECJ−1VB1H103K 2 1 − C2 27 pF ECJ−OEC1H270J 3 1 − C3 Uninstalled Uninstalled 4 1 − C4 0.001 µF ECJ−OEB1H102K 5 1 − C5 7 pF ECJ−OEC1H070D 6 1 − C6 15 pF ECJ−OEC1H150J 7 1 − C7 470 pF ECJ−OEB1H471K 8 2 2 C8, C11 68 µF 592D686X0010R2T 9 2 2 C9, C12 10 µF 293D106X0035D2W 10 2 2 C10, C13 1 µF 12063G105ZATRA 11 − 1 C14 0.01 µF ECJ−OEB1E103K 12 1 − D1 SMV1253 SMV1253−079 Skyworks Solutions Inc. 13 1 1 JMP1, JMP3 3 Pin berg (Make from AMP 4−103239−0) 14 1 1 JMP2, JMP4 4 Pin berg (Make from AMP 4−103239−0) 15 3 5 J1, J2, J3, J4, J5, J6, J7, J8, J9 SMA 142−0701−801 16 1 − L1 180 nH ELJ−RER18JF3 17 4 4 P1, P2, P3, P4 Banana−jack 3267 18 2 − R1, R2 56.2 kΩ ERJ−2RKF5622X 19 1 − R3 2.21 kΩ ERJ−2RKF2211X 20 1 − R4 470 Ω ERJ−2RKF4700X 21 1 1 R5, R7 49.9 Ω ERJ−3EKF49R9V (Uninstalled) 22 − 1 R6 100 Ω ERJ−2RKF1000X 23 1 − U1 LVP/16/18 SN65LVDS/P16/18 24 − 1 U2 LVDS/P SN65LVDS/P/17/19/20 25 1 − Y1 155.52 MHz CWI45−B Conner−Winfield Corp. 26 4 4 NA Rubber feet SJ5303−7−ND 27 1 1 NA PWB 6464145 Reference Value Part No. Schematic 2.2 Schematic The schematic for this device is attached. Bill of Materials and Schematic 2-3 5 4 3 2 1 VCC VCC P2 C1 100pf D C2 27pf VCC01 1 C3 Uninstalled C8 68uf + C4 C10 1uf Banana-Jack P3 1 L1 180 nH R1 56.2K C9 10uf + C11 68uf + .001uf R3 2.2k C12 10uf + C13 1uf Banana-Jack VCC01 P4 1 D1 SMV1253 VCC01 D Banana-Jack Y1 C J2 C LVDS/P/16/18 C5 1 2 3 4 C6 15pf 1 VCC01 P1 Banana-Jack C7 470pf VCC01 sma 8 7 6 5 R5 uninstalled VCC J1 sma VCC JMP2 3 pin berg 1 1 B B 4 R4 470 ohm R2 56.2K U1 Q* VCC D Qhg Vbb Qhg* GC EN* GND 9 3 7pf 2 155.52 Mhz 2 VCC01 VCC01 3 J3 JMP1 sma A A Title LVDS/P/16/17/18/19/20 EVM Size A Date: 5 4 3 Document Number 6464145 Friday, August 27, 2004 2 Rev A Sheet 1 of 1 2 5 4 3 2 1 D D J4 VCC sma C14 .01UF J5 C LVDS/P/17/19/20 sma R6 100ohm 1 2 3 4 J6 U2 Q* VCC D Qhg D* Qhg* Vbb EN* GND 9 J7 VCC01 C sma 8 7 6 5 R7 uninstalled J8 VCC01 sma VCC sma JMP4 4 3 2 1 3 pin berg 1 VCC01 B B 2 VCC01 3 J9 JMP3 sma A A Title LVDS/P/16/17/18/19/20 EVM Size A Date: 5 4 3 Document Number 6464145 Friday, August 27, 2004 2 Rev A Sheet 2 of 1 2