GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Features Description • SMPTE 292M, SMPTE 344M and SMPTE 259M compliant • Dual coaxial cable driving outputs with selectable slew rate The GS1528B is a second generation high-speed BiCMOS integrated circuit designed to drive one or two 75Ω co-axial cables. • 50Ω differential PECL input • Pb-free and RoHS compliant • Seamless interface to other HD-LINX II family products • Single 3.3V power supply operation • Operating temperature range: 0°C to 70°C The GS1528B accepts a LVPECL level differential input that may be AC coupled. External biasing resistors at the inputs are not required. Applications • The GS1528B 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. SMPTE 292M, SMPTE 344M and SMPTE 259M Coaxial Cable Serial Digital Interfaces Power consumption is typically 168mW using a 3.3V power supply. The GS1528B is Pb-free, and the encapsulation compound does not contain halogenated flame retardant. This component and all homogeneous subcomponents are RoHS compliant. BANDGAP REFERENCE AND BIASING CIRCUIT DDI INPUT DIFFERENTIAL PAIR RSET SDO OUTPUT STAGE & CONTROL DDI SDO SD/HD Figure A: GS1528B Functional Block Diagram GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 www.gennum.com 1 of 14 Revision History Version ECR PCN Date 4 154633 – August 2010 3 153754 – November 2009 2 142319 – April 2007 1 141659 – August 2006 0 140615 – May 2006 Changes and/or Modifications Correction to 7.1 Package Dimensions. Added 250pc tape & reel part number to 7.4 Ordering Information. Updated to latest Gennum template. Converting to Data Sheet. Added section 7.3 Marking Diagram. Added typical ORL value in Table 2-3: AC Electrical Characteristics. Removed power consumption and supply current data for SDO/SDO disabled in Table 2-2: DC Electrical Characteristics. New document. Contents Features.................................................................................................................................................................1 Applications.........................................................................................................................................................1 Description...........................................................................................................................................................1 Revision History .................................................................................................................................................2 1. Pin Out...............................................................................................................................................................3 1.1 GS1528B Pin Assignment ...............................................................................................................3 1.2 GS1528B Pin Descriptions .............................................................................................................3 2. Electrical Characteristics ............................................................................................................................4 2.1 Absolute Maximum Ratings ..........................................................................................................4 2.2 DC Electrical Characteristics ........................................................................................................4 2.3 AC Electrical Characteristics ........................................................................................................5 3. Solder Reflow Profiles..................................................................................................................................6 4. Input / Output Circuits ................................................................................................................................7 5. Detailed Description.....................................................................................................................................8 5.1 Input Interfacing ...............................................................................................................................8 5.2 Output Interfacing ...........................................................................................................................8 5.3 Output Return Loss Measurement ........................................................................................... 10 5.4 Output Amplitude Adjustment ................................................................................................. 10 6. Application Information .......................................................................................................................... 11 6.1 PCB Layout ....................................................................................................................................... 11 6.2 Typical Application Circuit ........................................................................................................ 11 7. Package and Ordering Information...................................................................................................... 12 7.1 Package Dimensions ..................................................................................................................... 12 7.2 Packaging Data ............................................................................................................................... 12 7.3 Marking Diagram ........................................................................................................................... 13 7.4 Ordering Information ................................................................................................................... 13 GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 2 of 14 1. Pin Out 1.1 GS1528B Pin Assignment DDI 1 DDI 2 VEE 3 RSET 4 GS1528B 8-PIN SOIC TOP VIEW 8 SDO 7 SDO 6 SD/HD 5 VCC Figure 1-1: 8-Pin SOIC 1.2 GS1528B Pin Descriptions Table 1-1: Pin Descriptions Pin Number Name Timing Type Description DDI, DDI 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 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. 1,2 GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 3 of 14 2. Electrical Characteristics 2.1 Absolute Maximum Ratings Table 2-1 lists the absolute maximum ratings for the GS1528B. 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 4kV Storage Temperature Range -50°C < Ts < 125°C Input Voltage Range (any input) -0.3 to (VCC +0.3)V Operating Temperature Range 0°C to 70°C Solder Reflow Temperature 260°C Power Dissipation 300mW 2.2 DC Electrical Characteristics Table 2-2 shows the DC electrical characteristics of the GS1528B where conditions are VCC = 3.3V ±5%, TA = 0°C to 70°C, unless otherwise shown. Table 2-2: DC Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Supply Voltage VCC – 3.135 3.3 3.465 V Power Consumption PD TA = 25°C – 168 – mW Supply Current Is TA = 25°C – 51 64 mA Output Voltage VCMOUT Common mode – VCC - VOUT – V VCMIN Common mode 1.4 + ΔVDDI/2 – VCC ΔVDDI/2 V VIH IIH <= 10uA 2.0 – – V VIL IIL <= 10uA – – 0.8 V Input Voltage SD/HD Input GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 4 of 14 2.3 AC Electrical Characteristics Table 2-3 shows the AC electrical characteristics of the GS1528B where conditions are VCC = 3.3V ±5%, TA = 0°C to 70°C, unless otherwise shown. Table 2-3: AC Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Notes DRSDO – – – 1.485 Gb/s 1 – 1.485Gb/s – 20 – psp-p – – 270Mb/s – 16 – psp-p – tr, tf SD/HD=0 – – 220 ps 2 tr, tf SD/HD=1 400 – 800 ps 2 Utr, Utf – – – 30 ps – – SD/HD=0 – – 30 ps 3 – SD/HD=1 – – 100 ps 3 – SD/HD=0 – – 10 % 3 – SD/HD=1 – – 8 % 3 Output Return Loss ORL – 15 20 – dB 4 Output Voltage Swing VOUT RSET = 750Ω 750 800 850 mVp-p 3 UVDDI Differential 300 – 2200 mVp-p – Serial input data rate Additive jitter Rise/Fall time Mismatch in rise/fall time Duty cycle distortion Overshoot Input Voltage Swing NOTES: 1. 2. 3. 4. The input coupling capacitor must be set accordingly for lower data rates. Rise/Fall time measured between 20% and 80%. Single Ended into 75Ω external load. ORL depends on board design. The GS1528B achieves this specification on Gennum's evaluation boards. GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 5 of 14 3. Solder Reflow Profiles The device is manufactured with Matte-Sn terminations and is compatible with both standard eutectic and Pb-free solder reflow profiles. MSL qualification was performed using the maximum Pb-free reflow profile shown in Figure 3-1. The recommended standard Pb reflow profile is shown in Figure 3-2. Temperature 60-150 sec. 20-40 sec. 260°C 250°C 3°C/sec max 217°C 6°C/sec max 200°C 150°C 25°C Time 60-180 sec. max 8 min. max Figure 3-1: Maximum Pb-free Solder Reflow Profile (Preferred) 60-150 sec. Temperature 10-20 sec. 230°C 220°C 3°C/sec max 183°C 6°C/sec max 150°C 100°C 25°C Time 120 sec. max 6 min. max Figure 3-2: Standard Pb Reflow Profile GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 6 of 14 4. Input / Output Circuits VCC DDI DDI VCC 10k 5k 10k 10k Figure 4-1: Differential Input Stage (DDI/DDI) 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 GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 7 of 14 5. Detailed Description 5.1 Input Interfacing DDI/DDI 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 2200mVpp. • The common mode voltage range must be as specified in the Table 2.2. • For input trace lengths longer than approximately 1cm, the inputs should be terminated as shown in the Typical Application Circuit. The GS1528B inputs are self-biased, allowing for simple AC coupling to the device. For serial digital video, a minimum capacitor value of 4.7μF should be used to allow coupling of pathological test signals. A tantalum capacitor is recommended. SD/HD Input Pin The GS1528B 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 GS1528B outputs are current mode, and will drive 800mV into a 75Ω load. These outputs are protected from accidental static damage with internal ESD protection diodes. The SMPTE 292M, SMPTE 344M and SMPTE 259M standards require that the output of a cable driver have a source impedance of 75Ω and a return loss of at least 15dB between 5MHz and 1.485GHz. In order for a DDI output circuit using the GS1528B to meet this specification, the output application circuit shown in the Typical Application Circuit on page 11 is recommended. The value of LCOMP will vary depending on the PCB layout, with a typical value of 5.6nH. A 4.7μF 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 11 for more details. GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 8 of 14 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 The output protection diodes act as a varactor (voltage controlled capacitor) as shown in Figure 5-3. Therefore, when measuring return loss at the GS1528B 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. GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 9 of 14 GS1528B 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 GS1528B 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. 5.4 Output Amplitude Adjustment The output amplitude of the GS1528B 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 750Ω is required. A ±1% SMT resistor should be used. The RSET resistor is part of the high speed output circuit of the GS1528B. 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. Table 5-1: RSET vs VOD RSET R (Ω) Output Swing (mVp-p) 995 608 824 734 750 800 680 884 573 1040 NOTE: For reliable operation of the GS1528B over the full temperature range, do not use an RSET value below 573Ω. GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 10 of 14 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 GS1528B output components to minimize parasitic capacitance. • The PCB ground plane is removed under the GS1528B 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 Circuit * 5.6n 75 4u7 GS1528B 49.9 10n 1 2 3 49.9 4u7 4 8 7 6 75 10n 75 75 VCC RSET DIFFERENTIAL DATA INPUT VCC SDO SDO SD/HD DDI DDI VEE BNC 4u7 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: GS1528B Typical Application Circuit GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 11 of 14 7. Package and 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° SYMBOL 7.1 Package Dimensions 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 q1 X q1 q2 A1 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. Figure 7-1: GS1528B Package Dimensions 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, θj-c 72°C/W Junction to Air Thermal Resistance, θj-a (at zero airflow) 116°C/W Pb-free and RoHS Compliant Yes GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 12 of 14 7.3 Marking Diagram G GS1528B XXXXE3 YYWW XXXX - Lot/Work Order ID YYWW - Date Code YY 2-digit year WW 2-digit week number Figure 7-2: GS1528B Marking Diagram 7.4 Ordering Information Table 7-2: Ordering Information Part Number Package Temperature Range GS1528B GS1528BCKAE3 8-pin SOIC 0°C to 70°C GS1528B GS1528BCTAE3 250pc tape & reel 8-pin SOIC 0°C to 70°C GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 13 of 14 DOCUMENT IDENTIFICATION CAUTION DATA SHEET ELECTROSTATIC SENSITIVE DEVICES The product is in production. Gennum reserves the right to make changes to the product at any time without notice to improve reliability, function or design, in order to provide the best product possible. DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION GENNUM CORPORATE HEADQUARTERS Phone: +1 (905) 632-2996 Fax: +1 (905) 632-2055 4281 Harvester Road, Burlington, Ontario L7L 5M4 Canada E-mail: [email protected] www.gennum.com OTTAWA SNOWBUSH IP - A DIVISION OF GENNUM GERMANY 232 Herzberg Road, Suite 101 Kanata, Ontario K2K 2A1 Canada 439 University Ave. Suite 1700 Toronto, Ontario M5G 1Y8 Canada Hainbuchenstraße 2 80935 Muenchen (Munich), Germany Phone: +1 (613) 270-0458 Phone: +1 (416) 925-5643 Fax: +49-89-35804653 Fax: +1 (613) 270-0429 Fax: +1 (416) 925-0581 E-mail: [email protected] CALGARY E-mail: [email protected] 3553 - 31st St. N.W., Suite 210 Calgary, Alberta T2L 2K7 Canada Web Site: http://www.snowbush.com Phone: +1 (403) 284-2672 UNITED KINGDOM North Building, Walden Court Parsonage Lane, Bishop’s Stortford Hertfordshire, CM23 5DB United Kingdom MEXICO 288-A Paseo de Maravillas Jesus Ma., Aguascalientes Mexico 20900 Phone: +49-89-35831696 NORTH AMERICA WESTERN REGION 691 South Milpitas Blvd., Suite #200 Milpitas, CA 95035 United States Phone: +1 (408) 934-1301 Fax: +1 (408) 934-1029 Phone: +1 (416) 848-0328 E-mail: [email protected] JAPAN KK NORTH AMERICA EASTERN REGION Fax: +44 1279 714171 Shinjuku Green Tower Building 27F 6-14-1, Nishi Shinjuku Shinjuku-ku, Tokyo, 160-0023 Japan INDIA Phone: +81 (03) 3349-5501 #208(A), Nirmala Plaza, Airport Road, Forest Park Square Bhubaneswar 751009 India Fax: +81 (03) 3349-5505 Web Site: http://www.gennum.co.jp KOREA Phone: +91 (674) 653-4815 TAIWAN Fax: +91 (674) 259-5733 6F-4, No.51, Sec.2, Keelung Rd. Sinyi District, Taipei City 11502 Taiwan R.O.C. 8F Jinnex Lakeview Bldg. 65-2, Bangidong, Songpagu Seoul, Korea 138-828 Phone: +44 1279 714170 E-mail: [email protected] Phone: (886) 2-8732-8879 Fax: (886) 2-8732-8870 4281 Harvester Road Burlington, Ontario L7L 5M4 Canada Phone: +1 (905) 632-2996 Fax: +1 (905) 632-2055 E-mail: [email protected] Phone: +82-2-414-2991 Fax: +82-2-414-2998 E-mail: [email protected] E-mail: [email protected] Gennum Corporation assumes no liability for any errors or omissions in this document, or for the use of the circuits or devices described herein. The sale of the circuit or device described herein does not imply any patent license, and Gennum makes no representation that the circuit or device is free from patent infringement. All other trademarks mentioned are the properties of their respective owners. GENNUM and the Gennum logo are registered trademarks of Gennum Corporation. © Copyright 2004 Gennum Corporation. 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