GS1528A and GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Features Applications GS1528A GS1528A * SMPTE 292M, SMPTE 344M and SMPTE 259M compliant * * Dual coaxial cable driving outputs with selectable slew rate * 50 differential PECL input * Pb-free and RoHS compliant * Pin compatible with GS9068A HD-LINX II SD SDI cable driver * Seamless interface to other HD-LINX II family products * Single 3.3V power supply operation * Operating temperature range: 0C to 70C SMPTE 292M, SMPTE 344M and SMPTE 259M Coaxial Cable Serial Digital Interfaces GS9068A * SMPTE 259M and SMPTE 344M Coaxial Cable Serial Digital Interfaces Description The GS1528A/9068A is a second generation, high speed BiCMOS integrated circuit designed to drive one or two 75W coaxial cables. The GS1528A may drive data rates up to 1.485Gb/s and provides two selectable slew rates in order to achieve compliance to SMPTE 259M, SMPTE 344M and SMPTE 292M. GS9068A * SMPTE 259M and SMPTE 344M compliant * Dual coaxial cable driving outputs * 50W differential PECL input * Pb-free and RoHS compliant * Pin compatible with GS1528A HD-LINX II multi-rate SDI dual slew-rate cable driver * Seamless interface to other HD-LINX II family products * Single 3.3V power supply operation * Operating temperature range: 0C to 70C The GS9068A may drive data rates up to 540Mb/s and will achieve compliance to SMPTE 259M and SMPTE 344M. Bandgap Reference & Biasing Circuit The GS1528A/9068A accepts a LVPECL level differential input that may be AC coupled. External biasing resistors at the inputs are not required. Power consumption is typically 168mW using a 3.3V power supply. The GS1528A/9068A is Pb-free, and the encapsulation compound does not contain halogenated flame retardant. This component and all homogeneous sub components are RoHS compliant. RSET Bandgap Reference & Biasing Circuit SDI Input Differential Pair RSET SDO Output Stage & Control SDI SDO SDI Input Differential Pair SDO Output Stage & Control SDI SDO GS1528A GS9068A SD/HD Figure A: GS1528A (left) and GS9068A (right) Functional Block Diagrams GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 www.semtech.com 1 of 18 Proprietary & Confidential Revision History Version ECR PCN Date 7 158377 - July 2012 Correction in GS9068A Pin Assignment 6 154747 - August 2010 Correction to Package Dimensions and Ordering Information. 5 153754 - November 2009 Updated to latest Gennum template. 4 139112 38124 January 2006 Corrected Input Differential Swing to 2200mV. 3 137886 - September 2005 2 137403 - July 2005 Updated to current document template to remove "Proprietary and Confidential" footer. Re-ordered solder reflow profiles to show preference for Pb-free profile. Clarified naming of standard Pb solder reflow profile. Added packaging data section. Updated document to reflect the RoHS compliance of both the GS1528A and GS9068A. 1 133654 - June 2004 Modified Table 2-3. Added reflow profiles. Upgraded from a preliminary data sheet to a data sheet. 0 132954 - February 2004 GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 Changes and/or Modifications Corrected process to BiCMOS. New document. 2 of 18 Proprietary & Confidential Contents Features.................................................................................................................................................................1 Applications.........................................................................................................................................................1 Description...........................................................................................................................................................1 Revision History .................................................................................................................................................2 1. Pin Out...............................................................................................................................................................4 1.1 GS1528A Pin Assignment ..............................................................................................................4 1.2 GS9068A Pin Assignment ..............................................................................................................4 1.3 GS1528A/GS9068A Pin Descriptions ........................................................................................4 2. Electrical Characteristics ............................................................................................................................5 2.1 Absolute Maximum Ratings ..........................................................................................................5 2.2 DC Electrical Characteristics ........................................................................................................5 2.3 AC Electrical Characteristics ........................................................................................................6 3. Solder Reflow Profile....................................................................................................................................8 4. Input / Output Circuits ................................................................................................................................9 5. Detailed Description.................................................................................................................................. 10 5.1 Input Interfacing ............................................................................................................................ 10 5.2 Output Interfacing ........................................................................................................................ 10 5.3 Output Return Loss Measurement ........................................................................................... 12 5.4 Output Amplitude Adjustment ................................................................................................. 12 6. Application Information .......................................................................................................................... 14 6.1 PCB Layout ....................................................................................................................................... 14 6.2 Typical Application Circuits ...................................................................................................... 14 7. Package & Ordering Information .......................................................................................................... 16 7.1 Package Dimensions ..................................................................................................................... 16 7.2 Packaging Data ............................................................................................................................... 16 7.3 Ordering Information ................................................................................................................... 17 GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 3 of 18 Proprietary & Confidential 1. Pin Out 1.1 GS1528A Pin Assignment SDI 1 SDI 2 VEE 3 RSET 4 GS1528A 8-pin SOIC (top view) 8 SDO 7 SDO 6 SD/HD 5 VCC Figure 1-1: 8 Pin SOIC 1.2 GS9068A Pin Assignment SDI 1 SDI 2 VEE 3 RSET 4 GS9068A 8-pin SOIC (top view) 8 SDO 7 SDO 6 NC 5 VCC Figure 1-2: 8 Pin SOIC 1.3 GS1528A/GS9068A Pin Descriptions Table 1-1: Pin Descriptions Pin Number Name Timing Type Description SDI, SDI Analog Input Serial digital differential input. 3 VEE - Power Most negative power supply connection. Connect to GND. 4 RSET Analog Input External output amplitude control resistor. 5 VCC - Power Most positive power supply connection. Connect to +3.3V. 6 SD/HD Non Synchronous Input GS1528A: Output slew rate control. When set HIGH, the output will meet SMPTE 259M rise/fall time specifications. When set LOW, the serial outputs will meet SMPTE 292M rise/fall time specifications. NC - - GS9068A: No connect. Not connected internally. SDO, SDO Analog Output Serial digital differential output. 1,2 7, 8 GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 4 of 18 Proprietary & Confidential 2. Electrical Characteristics 2.1 Absolute Maximum Ratings Table 2-1 lists the absolute maximum ratings for the GS1528A/GS9068A. Conditions exceeding the limits listed may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2-1: Absolute Maximum Ratings Parameter Value Supply Voltage -0.5V to 3.6 VDC Input ESD Voltage 2kV Storage Temperature Range -50C < Ts < 125C Input Voltage Range (any input) -0.3 to (VCC +0.3)V Operating Temperature Range 0C to 70C Solder Reflow Temperature 260C Power Dissipation 300mW 2.2 DC Electrical Characteristics Table 2-2 shows the DC electrical characteristics of the GS1528A and the GS9068A where conditions are VDD = 3.3V, TA = 0C to 70C, unless otherwise specified. Table 2-2: DC Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Notes Test Levels Supply Voltage VCC - 3.135 3.3 3.465 V 5% 3 Power Consumption PD TA = 25C - 168 - mW - 5 Supply Current Is TA = 25C - 51 64 mA - 1 Output Voltage VCMOUT Common mode - VCC - VOUT - V - 6 VCMIN Common mode 1.6 + VSDI/2 - VCC VSDI/2 V - 6 Input Voltage GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 5 of 18 Proprietary & Confidential Table 2-2: DC Electrical Characteristics (Continued) Parameter SD/HD Input Symbol Conditions Min Typ Max Units Notes Test Levels VIH - 2.4 - - V 1 7 VIL - - - 0.8 V 1 7 TEST LEVELS NOTES: 1. Production test at room temperature and nominal supply voltage with guard bands for supply and temperature ranges. 2. Production test at room temperature and nominal supply voltage with guard bands for supply and temperature ranges using correlated test. 3. Production test at room temperature and nominal supply voltage. 4. QA sample test. 5. Calculated result based on Level 1, 2, or 3. 6. Not tested. Guaranteed by design simulations. 7. Not tested. Based on characterization of nominal parts. 8. Not tested. Based on existing design/characterization data of similar product. 9. Indirect test. 1. This parameter applies only to the GS1528A. 2.3 AC Electrical Characteristics Table 2-3 shows the AC electrical characteristics of the GS1528A and the GS9068A where conditions are VDD = 3.3V, TA = 0C to 70C, unless otherwise specified. Table 2-3: AC Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Notes Test Levels DRSDO GS1528A - - 1.485 Gb/s 1 1 DRSDO GS9068A - - 540 Mb/s - 1 - 1.485Gb/s - 22 - psp-p 2 1 - 270Mb/s - 16 - psp-p - 4 - GS9068A - 16 - psp-p - 1 tr, tf SD/HD=0 - - 220 ps 2, 3 1 tr, tf SD/HD=1 400 - 800 ps 2, 3 1 tr, tf GS9068A 400 - 800 ps 3 1 Mismatch in rise/fall time Utr, Utf - - - 30 ps - 1 Duty cycle distortion - SD/HD=0 - - 30 ps 2 1 - SD/HD=1 - - 100 ps 2 7 - GS9068A - - 100 ps - 1 Serial input data rate Additive jitter Rise/Fall time GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 6 of 18 Proprietary & Confidential Table 2-3: AC Electrical Characteristics (Continued) Parameter Overshoot Symbol Conditions Min Typ Max Units Notes Test Levels - SD/HD=0 - - 10 % 2 7 - SD/HD=1 - - 8 % 2 1 - GS9068A - - 8 % - 1 Output Return Loss ORL - 15 - - dB - 7 Output Voltage Swing VOUT Single Ended into 75 external load 750 800 850 mVp-p - 1 300 - 2000 mVp-p - 7 RSET = 750 Input Voltage Swing UVSDI Differential TEST LEVELS NOTES: 1. Production test at room temperature and nominal supply voltage with guard bands for supply and temperature ranges. 2. Production test at room temperature and nominal supply voltage with guard bands for supply and temperature ranges using correlated test. 3. Production test at room temperature and nominal supply voltage. 4. QA sample test. 5. Calculated result based on Level 1, 2, or 3. 6. Not tested. Guaranteed by design simulations. 7. Not tested. Based on characterization of nominal parts. 8. Not tested. Based on existing design/characterization data of similar product. 9. Indirect test. 1. The input coupling capacitor must be set accordingly for lower data rates. 2. This parameter applies only to the GS1528A. 3. Rise/Fall time measured between 20% and 80%. GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 7 of 18 Proprietary & Confidential 3. Solder Reflow Profile The maximum Pb-free reflow profile is shown in Figure 3-1. Temperature 60-150 sec. 20-40 sec. 260C 250C 3C/sec max 217C 6C/sec max 200C 150C 25C Time 60-180 sec. max 8 min. max Figure 3-1: Maximum Pb-free Solder Reflow Profile GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 8 of 18 Proprietary & Confidential 4. Input / Output Circuits VCC SDI SDI VCC 5k 10k 10k 10k Figure 4-1: Differential Input Stage (SDI/SDI) VCC SDO SDO IREF Figure 4-2: Differential Output Stage (SDO/SDO) IREF derived using RSET VCC SD/HD On-chip Reference Figure 4-3: Slew Rate Select Input Stage (GS1528A only) GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 9 of 18 Proprietary & Confidential 5. Detailed Description 5.1 Input Interfacing SDI/SDI are high impedance differential inputs. The equivalent input circuit is shown in Figure 4-1. Several conditions must be observed when interfacing to these inputs: * The differential input signal amplitude must be between 300 and 2000mVp-p. * The common mode voltage range must be as specified in Table 2.2. * For input trace lengths longer than approximately 1cm, the inputs should be terminated as shown in the Typical Application Circuit. The GS1528A/9068A inputs are self-biased, allowing for simple AC coupling to the device. For serial digital video, a minimum capacitor value of 4.7F should be used to allow coupling of pathological test signals. A tantalum capacitor is recommended. SD/HD Input Pin (GS1528A only): The GS1528A SDO rise and fall times can be set to comply with both SMPTE 259M/344M and SMPTE 292M. For all SMPTE 259M standards, or any data rate that requires longer rise and fall time characteristics, the SD/HD pin must be set HIGH by the application layer. For SMPTE 292M standards and signals which require faster rise and fall times, this pin should be set LOW. 5.2 Output Interfacing The GS1528A/9068A outputs are current mode, and will drive 800mV into a 75 load. These outputs are protected from accidental static damage with internal static protection diodes. The SMPTE 292M, SMPTE 344M and SMPTE 259M standards require that the output of a cable driver have a source impedance of 75 and a return loss of at least 15dB between 5MHz and 1.485GHz. In order for an SDI output circuit using the GS1528A/9068A to meet this specification, the output application circuit shown in Typical Application Circuits on page 14 is recommended. The value of LCOMP will vary depending on the PCB layout, with a typical value of 5.6nH. A 4.7F capacitor is used for AC-coupling the output of the device. This value is chosen to ensure that pathological signals can be coupled without a significant DC component occurring. Please see Application Information on page 14 for more details. GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 10 of 18 Proprietary & Confidential Tek Stopped: 8110 Acquisitions Figure 5-1: Output signal for 270Mb/s input Tek Running: Normal Figure 5-2: Output signal for 1.485Gb/s input (GS1528A only) The output protection diodes act as a varactor (voltage controlled capacitor) as shown in Figure 5-3. Therefore, when measuring return loss at the GS1528A/9068A output, it is necessary to take the measurement for both a logic high and a logic low output condition. Consequently, the output capacitance of the device is dependent on the logic state of the output. GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 11 of 18 Proprietary & Confidential GS1528A SDO SDO Figure 5-3: Static Protection Diodes 5.3 Output Return Loss Measurement To perform a practical return loss measurement, it is necessary to force the GS1528A/9068A output to a DC high or low condition. The actual measured return loss will be based on the outputs being static at VCC or VCC-1.6V. Under normal operating conditions the outputs of the device swing between VCC-0.4V and VCC-1.2V, so the measured value of return loss will not represent the actual operating return loss. A simple method of calculating the values of actual operating return loss is to interpolate the two return loss measurements. In this way, the values of return loss are estimated at VCC-0.4V and VCC-1.2V based on the measurements at VCC and VCC-1.6V. The two values of return loss (high and low) will typically differ by several decibels. If the measured return loss is RH for logic high and RL for logic low, then the two values can be interpolated as follows: RIH = RH- (RH-RL)/4 and RIL = RL+(RH-RL)/4 Where RIH is the interpolated logic high value and RIL is the interpolated logic low value. For example: if RH = -18dB and RL = -14dB, then the interpolated values are RIH = -17dB and RIL = -15dB. 5.4 Output Amplitude Adjustment The output amplitude of the GS1528A/9068A can be adjusted by changing the value of the RSET resistor as shown in Table 5-1. For an 800mVp-p output with a nominal 7% tolerance, a value of 750 is required. A 1% SMT resistor should be used. The RSET resistor is part of the high speed output circuit of the GS1528A/9068A. The resistor should be placed as close as possible to the RSET pin. In addition, the PCB capacitance should be minimized at this node by removing the PCB groundplane beneath the RSET resistor and the RSET pin. GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 12 of 18 Proprietary & Confidential Table 5-1: RSET vs VOD RSET Resistance () Output Swing (mVp-p) 995 608 824 734 750 800 680 884 573 1040 NOTE: For reliable operation of the GS1528A/9068A over the full temperature range, do not use an RSET value below 573. GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 13 of 18 Proprietary & Confidential 6. Application Information 6.1 PCB Layout Special attention must be paid to component layout when designing serial digital interfaces for HDTV. An FR-4 dielectric can be used, however, controlled-impedance transmission lines are required for PCB traces longer than approximately 1cm. Note the following PCB artwork features used to optimize performance: * The PCB trace width for HD rate signals is closely matched to SMT component width to minimize reflections due to changes in trace impedance * The PCB groundplane is removed under the GS1528A/9068A output components to minimize parasitic capacitance * The PCB ground plane is removed under the GS1528A/9068A RSET pin and resistor to minimize parasitic capacitance * Input and output BNC connectors are surface-mounted in-line to eliminate a transmission line stub caused by a BNC mounting via high-speed traces, which are curved to minimize impedance variations due to change of PCB trace width 6.2 Typical Application Circuits * 5.6n 75 BNC 4u7 4u7 10n 1 2 3 49.9 SDO SDO SD/HD RSET DIFFERENTIAL DATA INPUT VCC GS1528A SDI SDI VEE 4 4u7 8 7 6 75 10n 75 75 VCC 49.9 BNC * 5.6n 5 4u7 VCC * TYPICAL VALUE VARIES WITH LAYOUT VCC 750 10n SD/HD NOTE: All resistors in Ohms, capacitors in Farads, and inductors in Henrys, unless otherwise noted. Figure 6-1: GS1528A Typical Application Circuit GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 14 of 18 Proprietary & Confidential * 5.6n 75 BNC 4u7 4u7 10n 1 2 3 49.9 SDO SDO NC RSET DIFFERENTIAL DATA INPUT VCC GS9068A SDI SDI VEE 4 4u7 8 7 6 75 10n 75 75 VCC 49.9 BNC * 5.6n 5 4u7 VCC * TYPICAL VALUE VARIES WITH LAYOUT VCC 750 10n NOTE: All resistors in Ohms, capacitors in Farads, and inductors in Henrys, unless otherwise noted. Figure 6-2: GS9068A Typical Application Circuit GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 15 of 18 Proprietary & Confidential 7. Package & Ordering Information D X E 0.010 Gauge Plane Pin 1 ID Mark q2 e B Seating Plane L DETAIL "A" DETAIL "A" 0.015 0.004 x 45 Min. Max. A 0.054 A1 B 0.004 0.068 0.0098 D E H e 0.196 0.157 0.244 0.229 0.050 BSC C L C A SYMBOL 7.1 Package Dimensions q1 X q1 A1 q2 8 SOIC 0.014 0.189 0.150 0.019 0.0075 0.016 0.0098 0.034 0.0215 REF 0 8 7 BSC NOTES: 1. All dimensions in inches unless otherwise stated. 2. Lead coplanarity should be 0 to 0.004" max. 3. Package surface finishing: VDI 24~27 (dual). Package surface finishing: VDI 13~15 (16L SOIC[NB] matrix). 4. All dimensions exclude mold flashes. 5. The lead width (B) to be determined at 0.0075" from the lead tip. 7.2 Packaging Data Table 7-1: Packaging Data Parameter Value Package Type 8-pin SOIC Moisture Sensitivity Level 2 Junction to Case Thermal Resistance, j-c 72C/W Junction to Air Thermal Resistance, j-a (at zero airflow) 116C/W Pb-free and RoHS Compliant Yes GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 16 of 18 Proprietary & Confidential 7.3 Ordering Information Table 7-2: Ordering Information Product Part Number Package Temperature Range GS1528A GS1528ACKAE3 8-pin SOIC 0C to 70C GS1528A GS1528ACTAE3 8-pin SOIC, 250pc tape and reel 0C to 70C GS1528A GS1528ACTAE3D 8-pin SOIC, 500pc tape and reel 0C to 70C GS9068A GS9068ACKAE3 8-pin SOIC 0C to 70C GS9068A GS9068ACTAE3 8-pin SOIC, 250pc tape and reel 0C to 70C GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 17 of 18 Proprietary & Confidential DOCUMENT IDENTIFICATION CAUTION DATA SHEET ELECTROSTATIC SENSITIVE DEVICES Information relating to this product and the application or design described herein is believed to be reliable, however such information is provided as a guide only and Semtech assumes no liability for any errors in this document, or for the application or design described herein. Semtech reserves the right to make changes to the product or this document at any time without notice. DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION (c) Semtech 2012 All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. 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Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. Contact Information Semtech Corporation Gennum Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805) 498-2111, Fax: (805) 498-3804 www.semtech.com GS1528A/GS9068A HD-LINX(R) II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 30953 - 7 July 2012 18 of 18 18 Proprietary & Confidential