GENLINX ™II GS9029 Quad Output Serial Digital Video Cable Driver DATA SHEET FEATURES DESCRIPTION • SMPTE 259M compliant The GS9029 is a second generation bipolar integrated circuit designed to drive four 75Ω co-axial cables. • operational from 143Mb/s to 540Mb/s and beyond • nominal 500ps rise/fall times • precise ±7.5% output amplitudes • 40% system power reduction over GS9007 • 75Ω on-chip input termination resistors • input hysteresis • operational down to 80mV input amplitude • superior output isolation • "Bus Through" expansion port for fan out requirements The GS9029 features two pairs of complementary outputs whose amplitude is controlled within ±7.5%. The output signal levels are also adjustable from 50mVp-p up to 1000mVp-p with little change in other performance parameters. The amplitude of the output stage is varied by adjusting the RSET resistor value. The patented current mode outputs ensure superior output return loss and minimal over shoot. The rise/fall time circuitry allows wide range operation and provides symmetrical balanced outputs to reject power supply noise. In addition high output isolation ensures that the cable driver outputs are not affected by the performance or status of other outputs. Operational with input amplitudes as low as 80mV, the GS9029 provides a robust serial interface. APPLICATIONS 4ƒsc, 4:2:2 and 4:4:4:4 serial digital video co-axial transmission interfaces from 143 to 540Mb/s; General purpose cable driving applications (co-axial cable or UTP). The GS9029 is packaged in a 16 pin narrow SOIC and operates from a single +5 or -5 volt supply. Typical system power consumption is 320mW which is 40% less than the GS9007. ORDERING INFORMATION PART NUMBER PACKAGE TEMPERATURE GS9029-CKD 16 pin SOIC Narrow 0°C to 70°C GS9029-CTD 16 pin SOIC Tap 0°C to 70°C RSET0 BANDGAP REFERENCE & BIASING CIRCUIT RSET1 SDI/T SDI/T SDO0 75 75 SDO0 SDI SDI INPUT DIFFERENTIAL PAIR WITH HYSTERESIS SDO1 SDO1 OUTPUT STAGE & RISE/FALL TIME CONTROL CIRCUIT BLOCK DIAGRAM Revision Date: February 2000 Document No. 521 - 97 - 02 GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 E-mail: [email protected] www.gennum.com GS9029 • four isolated outputs (two complimentary pairs), adjustable from 50mV-1000mV into 75Ω loads ABSOLUTE MAXIMUM RATINGS PARAMETER VALUE Supply Voltage (VS=VCC-VEE) 5.5V Input Voltage Range (any input) -0.3V to (VCC+0.3)V GS9029 Maximum Die Temperature 125°C 0°C ≤ TA ≤ 70°C Operating Temperature Range -65°C ≤ TS ≤ 150°C Storage Temperature Range Lead Temperature (soldering, 10 sec) 260°C DC ELECTRICAL CHARACTERISTICS VCC = 5V, VEE = 0V, TA = 0°C TO 70°C unless otherwise specified. Specifications assume 800mV output amplitude into 75Ω terminated line. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS TEST LEVEL 4.75 5.00 5.25 V 1 Supply Voltage VCC Operating Range. Power (system power) PS Driving four 75Ω cables. RSET = 54.9Ω. - 320 350 mW 5 Supply Current ΙCC Driving four 75Ω cables. RSET = 54.9Ω. - 64 70 mA 1 VCM_IN 2.4+(VDIFF/2) - VCC-(VDIFF/2) V 6, 7 VDIFF 80 - 1000 mV 6, 7 VCM_OUT - VCC-VOUT - V 5 RSET = 54.9Ω 740 800 860 mV 1 RSET = 43.2Ω 925 1000 1075 mV 1 - 25 - mV 7 Common Mode Input Voltage Differential Input Voltage Common Mode Output Voltage Range Differential Output Voltage VOUT Input Hysteresis TEST LEVELS 1. Production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges. 2. Production test at room temperature and nominal supply voltage with guardbands 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. 2 521 - 97 - 02 AC ELECTRICAL CHARACTERISTICS VCC = 5V, VEE = 0V, TA = 0°C TO 70°C unless otherwise specified. Specifications assume 800mV output amplitude into 75Ω terminated line. PARAMETER SYMBOL CONDITIONS TYP MAX UNITS 143 - 540 Mb/s 270Mb/s - 25 - ps p-p 540Mb/s - 25 - ps p-p 400 500 700 ps 1 Rise/Fall Times Mismatch - 50 100 ps 5 Overshoot - 5 - % VOUT Duty Cycle Distortion - 50 100 ps - 17 - dB Serial Data Bit Rate Additive Jitter Output Return Loss tR, tF 20% - 80% 5MHz - 540MHz 1 1, 2 2 7 7 1 2 7 NOTES 23 1. 6σ additive jitter measuring Pseudo random bit sequence (2 -1). 2. Measured with Gennum Evaluation Board (EB9029V1). TEST LEVELS 1. Production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges. 2. Production test at room temperature and nominal supply voltage with guardbands 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. 3 521 - 97 - 02 GS9029 Output Rise/Fall Times NOTES TEST LEVEL MIN GS9029 PIN CONNECTIONS RSET1 1 16 RSET0 VCC 2 15 VEE SDO1 3 14 SDO0 SDO1 4 13 SDO0 NC 5 12 NC NC 6 11 NC SDI 7 10 SDI/T SDI 8 9 SDI/T GS9029 TOP VIEW PIN DESCRIPTIONS NUMBER SYMBOL TYPE DESCRIPTION 1 RSET1 I 2 VCC 3, 4 SDO1,SDO1 5,6,11,12 NC 7, 8 SDI,SDI I Serial data inputs (inverse and true). 9, 10 SDI/T, SDI/T I Dual mode pin: Amplitude setting resistor for SDO1, SDO1. Most positive supply voltage. O Second differential serial output (inverse and true). No connect. a) “Bus Through” pins for serial data inputs when additional GS9029s are used on the same bus. b) Termination pins when using a single GS9029, or when the device is the last on an input bus. 13, 14 SDO0,SDO0 15 VEE 16 RSET0 O First differential serial output (true and inverse). Most negative supply voltage. I Amplitude setting resistor for SDO0, SDO0. 4 521 - 97 - 02 TYPICAL PERFORMANCE CURVES (VS = 5V, TA = 25°C unless otherwise shown. Devices guard band tested to 70°C only.) 530 525 520 515 TIME (ps) GS9029 510 505 500 495 490 485 480 0 10 20 30 40 50 60 70 80 TEMPERATURE (˚C) Fig. 1 Rise/Fall vs. Temperature Fig. 4 540Mb/s Eye Diagram 1.62 40 35 30 JITTER p-p (ps) OUTPUT LEVEL (V) 1.61 1.60 25 20 360Mb/s 177Mb/s 15 143Mb/s 540Mb/s 270Mb/s 1.59 10 1.58 0 10 20 30 40 50 60 70 80 0 TEMPERATURE (˚C) 20 40 60 80 TEMPERATURE (˚C) Fig. 2 Serial Data Output Level vs. Temperature Fig. 5 Peak to Peak Additive Jitter vs. Temperature Fig. 3 270Mb/s Eye Diagram 5 521 - 97 - 02 GS9029 DETAILED DESCRIPTION INPUT INTERFACING OUTPUT INTERFACING SDI/SDI are high impedance differential inputs. Two conditions must be observed when interfacing to these inputs: Figure 8 illustrates the recommended interface for ac coupled outputs. 1. The input signal amplitude must be between 80mV and 1000mV. VCC 2. The common mode voltage range must be as specified in the DC Characteristics Table (page 2). For 800mV input amplitude signals, this corresponds to a common mode voltage range between 2.8 and 4.6 volts. R RT GS9028 _ _ _ 1µF L 1µF Fig. 8 Interfaces for AC Coupled Outputs The termination resistor (RT) value should be equal to the characteristic impedance of the cable. Controlled impedance traces should be used for the outputs and the termination resistors should be placed near the GS9029. The inductor (L) and resistor (R) are used to optimize the output return loss and are PCB dependent. Typically, R equals the transmission line characteristic impedance and L is approximately 8.2nH. GS9029 SDI/T SDI/T 10nF L R GS9029 Figure 6 illustrates the simplest interface and is recommended when the trace lengths between the driver and the GS9029 are less than 0.5 in. + RT + Figures 6 and 7 illustrate two methods of interfacing the GS9029 to the Gennum GS9024 (Cable Equalizer), GS9035 (Reclocker) or the GS9025 (Receiver). + RT = R = ZO 10nF VCC OUTPUT AMPLITUDE ADJUSTMENT Fig. 6 Interfaces using Internal SDI Terminations The GS9029 outputs are adjustable from as low as 50mV to as high as 1000 mV. The output amplitudes are set by the RSET0 and the RSET1 resistors respectively. The relationship between the approximate output amplitude (VOUT) and RSET is given by the equation below: When trace lengths become longer than 0.5in. and data rates greater than 360Mb/s, electromagnetic reflections begin to affect signal integrity. To minimize reflections, controlled impedance traces and source and end terminations should be used as shown in Figure 7. Although terminations on both sides reduce the signal swing by a factor of two, the GS9029 is designed to meet this need with ultra low input amplitude requirements (as low as 80mV). 1.154 × ZO R SET = ---------------------------2 × VOUT where ZO is in ohms and VOUT is in volts. The minimum value of RSET is 43.2Ω. For 75Ω cable and 800mV output amplitudes, the value of RSET is 54.9Ω. Also, note that the above formula assumes that the transmission line is properly end terminated. VCC 10nF 75 75 + + _ _ GS9029 GS9028 SDI/T SDI/T 10nF Fig. 7 Interfaces using Internal SDI Terminations Connected to AC Ground The GS9029 can accept AC coupled input signals with no extra configuration required. 6 521 - 97 - 02 INPUT / OUTPUT CIRCUITS VCC GS9029 SDO SDI SDI SDO + SDI/T RSET SDI/T Fig. 9 Input Circuit (SDI, SDI, SDI/T, SDI/T) Fig. 10 Output Circuit (SDO1, SDO1, SDO0, SDO0) NOTES ON INPUT ARCHITECTURE The input pins of the GS9029 are configured so that two or three GS9029's can easily be connected to a single input bus as shown below. On-chip input termination resistors permit a proper termination by connecting pins 9 to 10 of the last device on the bus. If only one GS9029 is used, it should be connected as the last device in the diagram below. 1 1 Fig. 11 GS9029 Bussed Connections 7 521 - 97 - 02 TYPICAL APPLICATION CIRCUIT VCC VCC VCC 10n 10n 75 75 75 GS9029 1 RSET1 54.9 75 1µ0 RSET0 2 VCC 10n 8.2nH VEE 3 SDO1 75 4 1µ0 75 13 8.2nH 12 8.2nH NC NC 6 75 11 NC NC SDI SDI/T SDI SDI/T 7 SDI INPUT 14 SDO0 GS9029 5 15 SDO0 SDO1 8.2nH 10 8 75 54.9 16 1µ0 1µ0 All resistors in ohms, all capacitors in farads, unless otherwise stated. * 9 10n 10nF capacitor is optional. * See note on input architecture. CAUTION ELECTROSTATIC SENSITIVE DEVICES REVISION NOTES: Updated serial data bit rate values in Features and Description; Updated AC and DC Electrical Characteristics Tables; Removed Figure 5; Updated Typical Application Circuit. DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION DOCUMENT IDENTIFICATION DATA SHEET The product is in production. Gennum reserves the right to make changes at any time to improve reliability, function or design, in order to provide the best product possible. For the latest product information, visit www.gennum.com. GENNUM JAPAN CORPORATION C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku Tokyo 168-0081, Japan Tel. +81 (03) 3334-7700 Fax. +81 (03) 3247-8839 GENNUM CORPORATION MAILING ADDRESS: P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 GENNUM UK LIMITED 25 Long Garden Walk, Farnham, Surrey, England GU9 7HX Tel. +44 (0)1252 747 000 Fax +44 (0)1252 726 523 SHIPPING ADDRESS: 970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5 Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. © Copyright January 1999 Gennum Corporation. All rights reserved. Printed in Canada. 521 - 97 - 02 8