GENLINX™ GS9008 Cable Driver with Two Adjustable Outputs DATA SHEET FEATURES DEVICE DESCRIPTION • two outputs, adjustable from 0 to 1100 mVp-p into 75 Ω loads • nominal 600 ps rise and fall times The GENLINX ™ GS9008 is a bipolar integrated circuit designed to drive two 75 Ω co-axial cables at data rates exceeding 400 Mb/s. It directly interfaces with other GENLINX™ devices and can also be used as a general purpose high speed cable driver. • accepts SMPTE and standard ECL input levels • operates from a single +5 or -5 volt supply • on-chip DC restoration for low jitter • 170 mW power dissipation • interfaces with GENLINX ™ GS9002, GS9004A, GS9005A and GS9015A APPLICATIONS • SMPTE 259M Serial Digital Systems (4:2:2 & 4ƒsc) • Other Serial Digital Video Interfaces - 360 Mb/s • General purpose high speed driver applications PIN CONNECTIONS OUTPUT 1 1 8 VCC 7 INPUT OUTPUT 1 2 VSET 3 6 INPUT VREF 4 5 VEE While there are no plans to discontinue the GS9008, Gennum has developed a successor product with improved features and performance called the GS9028. The GS9028 is recommended for new designs. The differential inputs are AC-coupled and internally DCrestored which allows correct passage of pathological check codes associated with the serial digital standards. Even though the inputs are AC coupled, static protection diodes at each input restrict the DC differential so that if the driving source uses the opposite polarity power supply, external DC blocking capacitors must be used. Correctly terminated output signal levels are adjustable from as low as 0 mV to as high as 1100 mV with little change in other performance parameters. Performance is guaranteed for output levels between 600 mV and 1000 mV. The gain of the output stages is varied by adjusting the VSET voltage with respect to an internal band gap reference voltage VREF. The GS9008 is packaged in an 8 pin SOIC, and operates from a single +5 or -5 volt supply consuming typically only 170 mW of power. GS9008 GS9008 VSET VCC (GND) GAIN CONTROL ORDERING INFORMATION Part Number Package Type Temperature Range 8 Pin SOIC 0° to 70°C INPUT GS9008 - CKA INPUT VREF INPUT BUFFER & DC RESTORE OUTPUT 1 OUTPUT DRIVER OUTPUT 1 BAND-GAP REFERENCE GND (VEE) Patent No. 5,426,389. FUNCTIONAL BLOCK DIAGRAM Revision Date: April 1998 Document No. 520 - 77 - 04 GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996 fax. +1 (905) 632-5946 Web Site: www.gennum.com E-mail: [email protected] ABSOLUTE MAXIMUM RATINGS PARAMETER VALUE Supply Voltage (VS) 5.5 V Input Voltage Range (any input) VS -0.5 V Power Dissipation 300 mW 0° C ≤ T A ≤ 70 °C Operating Temperature Range -65°C ≤ T S ≤ 150°C Storage Temperature Range 260°C Lead Temperature (soldering, 10 sec) GS9008 CABLE DRIVER - DC ELECTRICAL CHARACTERISTICS Conditions: V S = 5V, T A = 0°C to 70°C, R L= 150 Ω to GND and 144 Ω AC coupled unless otherwise shown PARAMETER SYMBOL Supply Voltage CONDITIONS MIN VS Power Consumption PD I S1 Supply Current TYP MAX UNITS 4.5 5.0 5.5 volts - 170 190 mW - 62 67 mA DC No Loads, TA= 25oC - 16 20 mA 10 kΩ to ground - 1.2 - volts MAX UNITS 2 x150Ω Loads DC o 1% Accuracy, TA= 25 C VSET = (0.667) VREF I S2 Supply Current Reference Voltage VREF GS9008 CABLE DRIVER - AC ELECTRICAL CHARACTERISTICS Conditions: V = 5V, T = 0°C to 70°C, R = 150 Ω to GND and 144 Ω AC coupled unless otherwise shown S A PARAMETER Input Signal Amplitude Input Signal Rise/Fall Times Output Amplitudes across 75 Ω Load (See Note 1) Output Amplitude Temperature Coefficient (See Note 2) Output Rise/Fall Times (20% to 80%) L SYMBOL CONDITIONS VIN MIN 700 tR,tF VOUT TC tR,t F Output Overshoot Jitter tJ Propagation Delay tP TYP 800 1000 mVp-p - 750 ps VSET = (0.5) VREF 540 600 660 mVp-p Notes 1 & 2 V SET = (0.667) V REF 720 800 880 mVp-p Notes 1 & 2 VSET = (0.833) V REF 900 1000 1100 mVp-p Notes 1 & 2 VSET = (0.5) VREF - 25 100 ppm/oC VSET = (0.667) V REF - -12 80 ppm/oC VSET = (0.833) V REF - -45 80 ppm/oC VSET = (0.5) VREF 400 630 800 ps VSET = (0.667) V REF 400 575 800 ps VSET = (0.833) V REF 400 530 800 ps tR = tF = 600 ps - 0 - % at 270 Mb/s - - ±25 ps - 1 - NOTE 1. V OUT is measured across a correctly terminated load, back matched to the device. The peak to peak voltage of the device itself is 2 x VOUT. 2. V OUT is proportional to VSET and VSET may be an external low impedance, high stability supply. In this case the amplitude temperature coefficient will not be guaranteed. 520 - 77 - 3 NOTES 2 ns See Fig. 3 VCC INPUT / OUTPUT CIRCUITS VCC VCC 400 400 VCC VOUT SERIAL INPUTS VREF1 0.5p 400 VREF1 + VREF2 VCC VOUT Fig. 1 Input Circuit (Pins 6 and 7) Fig. 2 Output Circuit (Pins 1 and 2) 0.1 +5V OUTPUT LEVEL ADJUST 10k 1.8p 5 4 INPUT SIGNAL 6 3 INPUT SIGNAL 7 GS9008 1.0 68 2 68 1.0 OUTPUT -1 (75Ω) 1 8 1.8p + 10 OUTPUT -1 (75Ω) 150 150 0.1 All resistors in ohms, all capacitors in microfarads unless otherwise stated. Fig. 3 Typical Application Circuit -5V +5V 7 0.1µF ECL DRIVER GS9008 6 0.1µF -2V All resistors in ohms, all capacitors in microfarads unless otherwise stated. Fig. 4 Split Supply Interfacing 3 520 - 77 - 3 CAUTION ELECTROSTATIC SENSITIVE DEVICES DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION DOCUMENT IDENTIFICATION: DATA SHEET REVISION NOTES: 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. New information added to Device Description GENNUM CORPORATION GENNUM JAPAN CORPORATION C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081, Japan MAILING ADDRESS: P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 Tel. +1 (905) 632-2996 Fax +1 (905) 632-2814 Tel. +81 (3) 3334-7700 Fax: +81 (3) 3247-8839 GENNUM UK LIMITED Centaur House, Ancells Business Park, Ancells Road, Fleet, Hampshire, UK GU13 8UJ Tel. +44 (1252) 761 039 Fax +44 (1252) 761 114 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 March 1993 Gennum Corporation. All rights reserved. 520 - 77 - 3 4 Printed in Canada.