GS1524 HD-LINX™ II Multi-Rate SDI Adaptive Cable Equalizer GS1524 Data Sheet Key Features Description • SMPTE 292M, SMPTE 344M and SMPTE 259M compliant • automatic cable equalization • multi-standard operation from 143Mb/s to 1.485Gb/s • supports DVB-ASI at 270Mb/s The GS1524 is a second-generation high-speed bipolar integrated circuit designed to equalize and restore signals received over 75Ω co-axial cable at data rates from 143Mb/s up to 1.485Gb/s. The GS1524 is designed to support SMPTE 292M, SMPTE 344M and SMPTE 259M, and is optimized for performance at 270Mb/s and 1.485Gb/s. • manual bypass (useful for low data rates with slow rise/fall times) • performance optimized for 270Mb/s and 1.485Gb/s • typical maximum equalized length of Belden 1694A cable: 140m at 1.485Gb/s, 350m at 270Mb/s • 50Ω differential output (with internal 50Ω pull-ups) • Pb-free and RoHS Compliant Key Specifications • cable length indicator for SMPTE 259M inputs • output mute based on max cable length adjust or manual override • single 3.3V power supply operation • operating temperature range: 0°C to +70°C Applications • SMPTE 292M, SMPTE 344M and SMPTE 259M Coaxial Cable Serial Digital Interfaces The GS1524 features DC restoration to compensate for the DC content of SMPTE pathological test patterns. The GS1524 also incorporates a Cable Length Indicator (CLI) that provides an indication of the amount of cable being equalized for data rates up to 360Mb/s. A voltage programmable mute threshold (MCLADJ) is included to allow muting of the GS1524 output when an approximate selected cable length is reached for SMPTE 259M signals. This feature allows the GS1524 to distinguish between low amplitude SD-SDI signals and noise at the input of the device. The CD/MUTE pin provides an indication of the GS1524 mute status in addition to functioning as a mute control input. The SD outputs of the GS1524 may be forced to a mute state by applying a voltage to the CD/MUTE pin. Power consumption is typically 265mW using a 3.3V power supply. This component and all homogeneous subcomponents are RoHS compliant. CABLE LENGTH INDICATOR/ADJUSTOR CARRIER DETECT MUTE MCLADJ CLI CD/MUTE BYPASS SDI SDI EQUALIZER DC RESTORE OUTPUT SDO SDO AGC Functional Block Diagram 14976 - 7 June 2005 1 of 18 www.gennum.com GS1524 Data Sheet Contents Key Features .................................................................................................................1 Key Specifications .........................................................................................................1 Applications...................................................................................................................1 Description ....................................................................................................................1 1. Electrical Characteristics ...........................................................................................3 1.1 Absolute Maximum Ratings ............................................................................3 1.2 DC Electrical Characteristics ..........................................................................3 1.3 AC Electrical Characteristics ...........................................................................4 2. Pin Out ......................................................................................................................6 2.1 Pin Connections ..............................................................................................6 2.2 Pin Descriptions ..............................................................................................6 3. Input/Output Circuits .................................................................................................8 4. Typical Performance Curves ...................................................................................10 5. Detailed Description ................................................................................................14 6. Cable Length Indication/Carrier Detect/Mute ..........................................................15 7. Application Information............................................................................................16 7.1 PCB Layout ...................................................................................................16 7.2 Typical Application Circuit .............................................................................16 8. Package dimensions ...............................................................................................17 8.1 Ordering Information .....................................................................................17 9. Revision History ......................................................................................................18 14976 - 7 June 2005 2 of 18 GS1524 Data Sheet 1. Electrical Characteristics 1.1 Absolute Maximum Ratings Parameter Value Supply Voltage -0.5V to +3.6VDC Input ESD Voltage 500V 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 Power Dissipation 300mW Lead Temperature (soldering, 10 sec.) 260°C 1.2 DC Electrical Characteristics Table 1-1: DC Electrical Characteristics VDD = 3.3V, TA = 0°C to 70°C, unless otherwise shown Parameter Conditions Symbol Min Typ Max Units Notes Test Levels Supply Voltage – VCC 3.135 3.3 3.465 V ± 5% 1 Power Consumption TA=25°C PD – 265 – mW – 5 Supply Current TA=25°C ΙS – 80 – mA – 1 Output Common Mode Voltage TA=25°C VCMOUT – VCC - ΔVSDO/2 – V – 7 Input Common Mode Voltage TA=25°C VCMIN – 1.75 – V – 10 CLI DC Voltage (0m) TA=25°C – – 2.5 – V – 1 CLI DC Voltage (no signal) TA=25°C – – 1.9 – V – 7 Floating MCLADJ DC Voltage TA=25°C – – 1.3 – V – 7 MCLADJ Range TA=25°C – – 0.69 – V – 7 CD/Mute Output Voltage Carrier not present VCD/Mute(OH) 2.6 – – V – 1 Carrier present VCD/Mute(OL) – – 1.2 – 1 14976 - 7 June 2005 3 of 18 GS1524 Data Sheet Table 1-1: DC Electrical Characteristics VDD = 3.3V, TA = 0°C to 70°C, unless otherwise shown Parameter Conditions Symbol Min Typ Max Units Notes Test Levels CD/Mute Input Voltage Required to Force Outputs to Mute Min to Mute VCD/Mute 3.0 – – V – 7 CD/Mute Input Voltage Required to Force Active Max to Activate VCD/Mute – – 2.0 V – 7 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. 9. Indirect test. 10.Wafer Probe 1.3 AC Electrical Characteristics Table 1-2: AC Electrical Characteristics VDD = 3.3V, TA = 0°C to 70°C, unless otherwise shown Parameter Conditions Symbol Min Typ Max Units Notes Test Levels Serial input data rate – – 143 – 1485 Mb/s – 6 Input Voltage Swing TA =25°C, differential ΔVSDI 720 800 950 mVp-p 0m cable length 1 Output Voltage Swing 50Ω load, TA =25°C, ΔVSDO – 750 – mVp-p – 1 270Mb/s, Belden 1694A, 0.2UI output jitter – – 350 – m Equalizer Pathological 7 270Mb/s, Belden 8281 – – 280 – m Equalizer Pathological 1 – – 140 – m Equalizer Pathological 7 – – 100 – m Equalizer Pathological 1 – – 80 220 ps – 1 – – – 30 ps – 1 differential Maximum equalized cable length 0.2UI output jitter 1.485Gb/s, Belden 1694A 0.25UI output jitter 1.485Gb/s, Belden 8281 0.25UI output jitter Output Rise/Fall time 20% - 80% Mismatch in rise/fall time 14976 - 7 June 2005 4 of 18 GS1524 Data Sheet Table 1-2: AC Electrical Characteristics VDD = 3.3V, TA = 0°C to 70°C, unless otherwise shown Parameter Conditions Symbol Min Typ Max Units Notes Test Levels Duty cycle distortion – – – – 30 ps – 1 Overshoot – – – – 10 % – 1 Input Return Loss – – 15 – – dB 1 7 Input Resistance single ended – – 1.64 – kΩ – 6 Input Capacitance single ended – – 1 – pF – 6 Output Resistance single ended – – 50 – Ω – 6 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. 9. Indirect test. NOTES: 1. 1. Tested on CB1524 board from 5MHz to 2GHz. GigaBERT 1400 EXT. CLOCK DATA CLOCK OUT OUT 8281 or 1694A CABLE 50/75 IN GS1524 TEST BOARD EXT. CLOCK 1.485GHz/270MHz OUT CH. 1 OUT CH. 2 TDS 820 EXT. TRIGGER Figure 1-1: Test Circuit 14976 - 7 June 2005 5 of 18 GS1524 Data Sheet 2. Pin Out 2.1 Pin Connections CLI 1 16 CD/MUTE VCC 2 15 V VEE 3 14 VEE SDI 4 13 SDO SDI 5 12 SDO V EE 6 11 V AGC+ 7 10 MCLADJ AGC- 8 9 BYPASS CC GS1524 16PIN SOIC TOP VIEW EE Figure 2-1: 16 PIN SOIC 2.2 Pin Descriptions Table 2-1: Pin Descriptions Pin Number Name Type Description 1 CLI ANALOG OUTPUT CABLE LENGTH INDICATOR. An analog voltage proportional to the cable length connected to the Serial digital input. Note: CLI is recommended for data rates up to 360Mb/s only. 4,5 SDI, SDI INPUT Serial digital differential input. 7,8 AGC+, AGC- PASSIVE INPUT External AGC capacitor. Should be set to IµF 9 BYPASS LOGIC INPUT Forces the Equalizing and DC RESTORE stages into bypass mode when HIGH. No equalization occurs in this mode. 10 MCLADJ ANALOG INPUT MAXIMUM CABLE LENGTH ADJUST. Adjusts the approximate maximum amount of cable to be equalized (from 0m to the maximum cable length). The output is muted (latched to the last state) when the maximum cable length is achieved. Note: MCLADJ is recommended for data rates up to 360Mb/s 12, 13 SDO, SDO PECL OUTPUT 14976 - 7 Equalized serial digital differential output. June 2005 6 of 18 GS1524 Data Sheet Table 2-1: Pin Descriptions 16 CD/MUTE BIDIRECTIONAL MUTE INDICATOR-CONTROL/ CARRIER DETECT. OUTPUT: the output voltage drops to below 1.2V when the carrier is present and the data outputs are active. INPUT: if the CD/MUTE pin is tied to ground, the data output will never mute and the MCLADJ setting is overwritten. If the CD/MUTE pin is tied to VCC, the data outputs will always mute and the MCLADJ setting is overwritten. Note: CD/MUTE is not functional in BYPASS mode. 3, 6, 11, 14 VEE POWER Most negative power supply connection. Connect to ground. 2, 15 VCC POWER Most positive power supply connection. Connect to +3.3V. 14976 - 7 June 2005 7 of 18 GS1524 Data Sheet 3. Input/Output Circuits All resistors in ohms, all capacitors in farads, unless otherwise shown. 3k 3k SDI SDI RC 3.6k 3.6k Figure 3-1: Input Equivalent Circuit VCC 12k + MCLADJ - 150µ Figure 3-2: MCLADJ Equivalent Circuit 50 SDO 50 SDO Figure 3-3: Output Circuit 14976 - 7 June 2005 8 of 18 GS1524 Data Sheet VCC 10k 10k - CLI + Figure 3-4: CLI Output Circuit VCC 7.5k OUTPUT STAGE CD/MUTE MUTE CONTROL Figure 3-5: CD/Mute Circuit Internal Reference Bypass Figure 3-6: Bypass Circuit 14976 - 7 June 2005 9 of 18 GS1524 Data Sheet 4. Typical Performance Curves (unless otherwise shown, VCC = 3.3V, TA = 25°C) POWER CONSUMPTION (mW) 350 300 250 200 150 100 50 0 0 20 40 60 80 150 200 TEMPERATURE (˚C) Figure 4-1: Power Consumption 160 140 JITTER (ps) 120 100 80 60 40 20 0 0 50 100 CABLE LENGTH (m) Figure 4-2: Typical Peak to Peak Jitter, PRN 223-1, Belden 1694A, 1.485 Gb/s OUTPUT SIGNAL SWING (mV) 500 400 300 200 100 0 0 20 40 60 80 TEMPERATURE (˚C) Figure 4-3: Output Signal Swing, p-p, Single Ended 14976 - 7 June 2005 10 of 18 GS1524 Data Sheet 1100 900 JITTER (ps) 700 500 400 300 200 100 0 0 100 200 300 400 CABLE LENGTH (m) Figure 4-4: Typical Peak to Peak Jitter, PRN 223-1, Belden 1694A, 270Mb/s VOLTAGE (V) 3.5 3.0 2.5 2.0 0 50 150 100 200 250 300 CABLE LENGTH (m) Figure 4-5: MCLADJ Input Voltage vs 1694A Cable Length, 270Mb/s CLI VOLTAGE (V) 3.5 3 2.5 2 1.5 0 50 100 150 200 250 300 CABLE LENGTH (m) Figure 4-6: CLI Voltage vs. Belden 8281 Cable Length, 270Mb/s 14976 - 7 June 2005 11 of 18 GS1524 Data Sheet Tek Running: Normal Figure 4-7: Input 100m (Belden 8281), 1.485Gb/s Figure 4-8: Input 280m (Belden 8281), 270Mb/s 0 -10 -20 -30 -40 -50 0.05 GHz 1 GHz 2 GHz Figure 4-9: Input Return Loss using CB1524 Board 14976 - 7 June 2005 12 of 18 GS1524 Data Sheet Figure 4-10: Fig. 17 Output 100m (Belden 8281), 1.485Gb/s Figure 4-11: Output 280m (Belden 8281), 270Mb/s 14976 - 7 June 2005 13 of 18 GS1524 Data Sheet 5. Detailed Description The GS1524 is a high speed bipolar IC designed to equalize both HD and SD serial digital signals. The device can typically equalize greater than 140 meters of Belden 1694A cable at 1.485Gb/s and 350m at 270Mb/s. Powered from a single +3.3V or -3.3V power supply, the device consumes approximately 265mW of power. The serial data signal may be connected to the input pins (SDI/SDI) in either a differential or single ended configuration. AC coupling of the inputs is recommended, as the SDI and SDI inputs are internally biased at approximately 1.8V. The input signal passes through a variable gain equalizing stage whose frequency response closely matches the inverse of the cable loss characteristic. In addition, the variation of the frequency response with control voltage imitates the variation of the inverse cable loss characteristic with cable length. The edge energy of the equalized signal is monitored by a detector circuit which produces an error signal corresponding to the difference between the desired edge energy and the actual edge energy. This error signal is integrated by both an internal and an external AGC filter capacitor providing a steady control voltage for the gain stage. As the frequency response of the gain stage is automatically varied by the application of negative feedback, the edge energy of the equalized signal is kept at a constant level which is representative of the original edge energy at the transmitter. The equalized signal is also DC restored, effectively restoring the logic threshold of the equalized signal to its correct level independent of shifts due to AC coupling. The digital output signals have a nominal voltage of 750mVpp differential, or 375mVpp single ended when terminated with 50Ω as shown in Figure 5-1. +187.5mV VCM = 2.925V typical SDO -187.5mV SDO +187.5mV 50 50 VCM = 2.925V typical -187.5mV Figure 5-1: Typical Output Voltage Levels 14976 - 7 June 2005 14 of 18 GS1524 Data Sheet 6. Cable Length Indication/Carrier Detect/Mute For SMPTE 259M inputs the GS1524 incorporates an analog cable length indicator (CLI) output and a programmable threshold output mute (MCLADJ). In addition, a multi-function CD/MUTE pin allows control of the GS1524 MUTE functionality for both SD and HD inputs. The voltage output of CLI pin is an approximation of the amount of cable present at the GS1524 input for data rates up to 360Mb/s. The CLI voltage versus cable length (signal strength) is shown in Figure 4-6. With 0m of cable, 800mV input signal levels and at 270Mb/s, the CLI output voltage is approximately 2.5V. As the cable length increases, the CLI voltage decreases providing an approximate correlation between the CLI voltage and cable length. In applications where there are multiple input channels using the GS1524, it is advantageous to have a programmable mute output to avoid signal crosstalk. The output of the GS1524 can be muted when the input signal decreases below a selectable input level. The voltage applied to the MCLADJ pin vs input cable length is shown in Figure 4-5. For consistent accurate results this may need to be calibrated for each device. The MCLADJ pin may be left unconnected for applications where output muting is not required. This feature has been designed for use in applications such as routers where signal crosstalk and circuit noise cause the equalizer to output erroneous data when no input signal is present. The use of a Carrier Detect function with a fixed internal reference does not solve this problem since the signal to noise ratio on the circuit board could be significantly less than the default signal detection level set by the on chip reference. Note: MCLADJ and CLI are only recommended for data rates up to 360Mb/s. The CD/Mute pin is a multi-function bidirectional pin that provides the following functions: Applying a HIGH INPUT to the CD/Mute pin forces the GS1524 outputs to a muted condition. See the Table 1-1: DC Electrical Characteristics for voltage levels. In this condition the outputs will be latched to the last logic level present at the output to avoid signal crosstalk. Applying a LOW INPUT to the CD/Mute pin will force the GS1524 outputs to remain active regardless of the length of input cable and the voltage applied to the MCLADJ pin. See the Table 1-1: DC Electrical Characteristics for voltage levels. When used as an OUTPUT, the CD/Mute pin will provide an indication of the output mute status. The CD/Mute voltage will fall to below 1.2V when the carrier is present and the data outputs are active. Note: The CD/Mute pin is not functional in BYPASS mode. 14976 - 7 June 2005 15 of 18 GS1524 Data Sheet 7. Application Information 7.1 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: PCB trace width for HD rate signals is closely matched to SMT component width to minimize reflections due to change in trace impedance. The PCB ground plane is removed under the GS1524 input components to minimize parasitic capacitance. The PCB ground plane is removed under the GS1524 output components to minimize parasitic capacitance. High speed traces are curved to minimize impedance changes. 7.2 Typical Application Circuit CLI CD/MUTE VCC VCC 10n BNC GS1524 6.4n 1 2 3 1u 4 5 6 7 75 1u 8 75 + 37.4 CLI VCC VEE SDI SDI VEE AGC+ AGC- 10n CD/MUTE VCC VEE SDO SDO VEE MCLADJ BYPASS 16 15 14 13 12 11 10 9 + 4u7 SDO + SDO 4u7 1u MCLADJ NOTE: All resistors in Ohms, capacitors in Farads, and inductors in Henrys, unless otherwise noted. 14976 - 7 June 2005 BYPASS 16 of 18 GS1524 Data Sheet 8. Package dimensions * CONTROLLING DIMENSION: MM MILLIMETER INCH Symbol MIN. NOM. MAX. MIN. NOM. MAX. A 1.35 1.63 1.75 0.053 0.064 0.069 A1 0.10 0.15 0.25 0.004 0.006 0.010 A2 1.30 1.40 1.50 0.051 0.055 0.059 b 0.33 0.41 0.51 0.013 0.016 0.020 0.25 0.007 c 0.19 0.010 D 9.80 9.91 10.01 0.386 0.390 0.394 E 3.80 3.90 4.00 0.150 0.154 0.157 e 1.27 0.50 H 5.80 6.00 6.20 0.228 0.236 0.244 L 0.40 0.64 1.27 0.016 0.025 0.050 L1 0.042 1.07 0.10 Y 8˚ 0˚ 0.004 0˚ 8˚ Figure 8-1: 16 PIN SOIC 8.1 Ordering Information Part Number Package Temperature Pb-Free and RoHS Compliant GS1524-CKD 16 pin SOIC 0°C to 70°C No GS1524-CTD 16 pin SOIC Tape 0°C to 70°C No GS1524-CKDE3 16 pin SOIC 0°C to 70°C Yes GS1524-CTDE3 16 pin SOIC Tape 0°C to 70°C Yes 14976 - 7 June 2005 17 of 18 GS1524 Data Sheet 9. Revision History Version ECR Date Changes and / or Modifications 6 136565 April 2005 Updated ‘Green’ references to RoHS Compliant. 7 137165 June 2005 Rephrased RoHS compliance statement. CAUTION ELECTROSTATIC SENSITIVE DEVICES 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 to the product at any time without notice to improve reliability, function or design, in order to provide the best product possible. GENNUM CORPORATION Mailing Address: P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 Shipping Address: 970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5 Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 GENNUM JAPAN CORPORATION Shinjuku Green Tower Building 27F, 6-14-1, Nishi Shinjuku, Shinjuku-ku, Tokyo, 160-0023 Japan Tel. +81 (03) 3349-5501, Fax. +81 (03) 3349-5505 GENNUM UK LIMITED 25 Long Garden Walk, Farnham, Surrey, England GU9 7HX Tel. +44 (0)1252 747 000 Fax +44 (0)1252 726 523 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. GENNUM and the G logo are registered trademarks of Gennum Corporation. © Copyright 2001 Gennum Corporation. All rights reserved. Printed in Canada. www.gennum.com 14976 - 7 June 2005 18 of 18 18