GS9074A HD-LINX(R) II Adaptive Cable Equalizer Features Description * SMPTE 259M compliant * Automatic cable equalization * Multi-standard operation from 143Mb/s to 360Mb/s The GS9074A is a second-generation high speed BiCMOS integrated circuit designed to equalize and restore signals received over 75 co-axial cable. * Supports DVB-ASI at 270Mb/s * Small footprint (4mm x 4mm) * Pb-free and RoHS compliant * Manual bypass (useful for low data rates with slow rise/fall times) The GS9074A is designed to support SMPTE 259M, and is optimized for performance at 270Mb/s. The GS9074A features DC restoration to compensate for the DC content of SMPTE pathological test patterns. * Performance optimized for 270Mb/s * Typical maximum equalized length of Belden 1694A cable: 350m at 270Mb/s * 50 differential output (with internal 50 pull-ups) * Manual output mute or programmable mute based on max cable length adjust * Single 3.3V power supply operation * Operating temperature range: 0C to +70C Power consumption is typically 215mW using a 3.3V power supply. The GS9074A is lead-free, and the encapsulation compound does not contain halogenated flame retardant (RoHS compliant). Applications * A voltage programmable mute threshold (MCLADJ) is included to allow muting of the GS9074A output when an approximate selected cable length is reached for SMPTE 259M signals. This feature allows the GS9074A to distinguish between low amplitude SD-SDI signals and noise at the input of the device. The serial digital outputs of the GS9074A may be forced to a mute state by applying a voltage to the MUTE pin. SMPTE 259M Coaxial Cable Serial Digital Interfaces CABLE LENGTH ADJUSTOR CARRIER DETECT MUTE MCLADJ CD MUTE BYPASS SDI SDI EQUALIZER DC RESTORE OUTPUT SDO SDO AGC Figure A: GS9074A Functional Block Diagram GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 www.gennum.com 1 of 17 Revision History Version ECR PCN Date Changes and/or Modifications 5 157362 - December 2011 Added 250pc tape & reel part number to Table 8-2: Ordering Information. 4 153754 - November 2009 Updated to latest Gennum template. 3 139635 38695 March 2006 2 138357 37278 November 2005 Converted to Data Sheet. 1 137888 - September 2005 Corrected process to BiCMOS. 0 136165 - March 2005 A 135927 - February 2005 Corrected pad standoff height and tolerances for pad width and package dimension. Corrected pad shape. Converted to Preliminary Data Sheet. Updated typical application circuit. Updated Input/Output circuits. Updated AC and DC electrical characteristics. Updated description of MUTE and CD functionality. Corrected minor typing errors. Updated center pad dimensions on PCB footprint. New document. Contents Features.................................................................................................................................................................1 Applications.........................................................................................................................................................1 Description...........................................................................................................................................................1 Revision History .................................................................................................................................................2 1. Pin Out...............................................................................................................................................................3 1.1 GS9074A Pin Assignment ..............................................................................................................3 1.2 GS9074A Pin Descriptions .............................................................................................................3 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 Profiles..................................................................................................................................8 4. Test Circuit.......................................................................................................................................................9 5. Input / Output Circuits ............................................................................................................................. 10 6. Detailed Description.................................................................................................................................. 12 6.1 Serial Digital Inputs ...................................................................................................................... 12 6.2 Cable Equalization ........................................................................................................................ 12 6.3 Programmable Mute Output ...................................................................................................... 13 6.4 Mute and Carrier Detect .............................................................................................................. 13 7. Application Information .......................................................................................................................... 14 7.1 Typical Application Circuit ........................................................................................................ 14 8. Package and Ordering Information...................................................................................................... 15 8.1 Package Dimensions ..................................................................................................................... 15 8.2 Recommended PCB Footprint ................................................................................................... 16 8.3 Packaging Data ............................................................................................................................... 16 8.4 Ordering Information ................................................................................................................... 17 GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 2 of 17 1. Pin Out VEE_A 1 SDI 2 VCC_A CD MUTE VCC_D 1.1 GS9074A Pin Assignment 16 15 14 13 12 VEE_D 11 SDO 3 10 SDO 4 9 VEE_D GS9074A (top view) 6 7 8 Center Pad (bottom of package, internally bonded to VEE_A) MCLADJ AGC 5 BYPASS VEE_A AGC SDI Figure 1-1: 16-Pin QFN 1.2 GS9074A Pin Descriptions Table 1-1: Pin Descriptions Pin Number 1, 4 Name Timing Type VEE_A Analog Power Description Most negative power supply for analog circuitry. Connect to GND. 2, 3 SDI, SDI Analog Input 5, 6 AGC, AGC Analog - Serial digital differential input. External AGC capacitors. (See Section 7.1 Typical Application Circuit.) 7 BYPASS Not Synchronous Input 8 MCLADJ Analog Input Forces the Equalizing and DC RESTORE stages into bypass mode when HIGH. No equalization occurs in this mode. 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 only recommended for data rates up to 270Mb/s. GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 3 of 17 Table 1-1: Pin Descriptions (Continued) Pin Number 9 Name Timing Type Description VEE_D Analog Power Most negative power supply for the digital circuitry and output buffer. Connect to GND. 10, 11 12 SDO, SDO Analog Output Equalized serial digital differential output. VEE_D Analog Power Most negative power supply for the digital circuitry and output buffer. Connect to GND. 13 VCC_D Analog Power Most positive power supply for the digital I/O pins of the device. Connect to +3.3V DC. 14 MUTE Not Synchronous Input CONTROL SIGNAL INPUT levels are LVCMOS/LVTTL compatible. (3.3V Tolerant) (Internal pull down resistor) When the MUTE pin is set HIGH by the application interface, the serial digital output of the device will be forced to a steady state. When the MUTE pin is set LOW, the serial digital output of the device will be active. NOTE: This pin may be connected directly to the CD pin to allow mute on loss of carrier. 15 CD Not Synchronous Output STATUS SIGNAL OUTPUT Signal levels are LVCMOS/LVTTL compatible. Indicates the presence of a good input signal. When the CD pin is LOW, a good input signal has been detected. When this pin is HIGH, the input signal is invalid. This pin will indicate loss of carrier for data rates > 19Mb/s. 16 VCC_A Analog Power Most positive power supply for the analog circuitry of the device. Connect to +3.3V DC. - Center Pad - GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 Power Internally bonded to VEE_A. 4 of 17 2. Electrical Characteristics 2.1 Absolute Maximum Ratings Table 2-1 lists the absolute maximum ratings for the GS9074A. 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 Reflow Temperature 260C Supply Voltage -0.5V to +3.6 VDC 2.2 DC Electrical Characteristics Table 2-2 shows the DC electrical characteristics of the GS9074A where conditions are VDD = 3.3V, TA = 0C to 70C, unless otherwise shown. Table 2-2: DC Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Notes Supply Voltage VCC - 3.135 3.3 3.465 V 5% Power Consumption PD TA = 25C - 215 - mW - Supply Current Is TA = 25C - 65 - mA - VCMOUT TA = 25C - VCC VSDO/2 - V - VCMIN TA = 25C - 1.75 - V - MCLADJ DC Voltage (to mute signal) - 0m, TA = 25C - 1.3 - V - MCLADJ Range - TA = 25C - 0.4 - V - Output Common Mode Voltage Input Common Mode Voltage GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 5 of 17 Table 2-2: DC Electrical Characteristics (Continued) Parameter Symbol Conditions Min Typ Max Units Notes VCD(OH) Carrier not present 2.4 - - V - VCD(OL) Carrier present - - 0.4 V - Mute Input Voltage Required to Force Outputs to Mute VMute Min to Mute 2.0 - - V - Mute Input Voltage Required to Force Outputs Active VMute Max to Activate - - 0.8 V - CD Output Voltage 2.3 AC Electrical Characteristics Table 2-3 shows the AC electrical characteristics of the GS9074A where conditions are VDD = 3.3V, TA = 0C to 70C, unless otherwise shown. Table 2-3: AC Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Notes Serial input data rate DRSDO - 143 - 360 Mb/s - Input Voltage Swing VSDI TA =25C, differential 720 800 950 mVp-p 1 Output Voltage Swing VSDO 100 load, TA =25C, differential - 750 - mVp-p - - 270Mb/s, Belden 1694A, 350m - 0.2 - UI 2 - 270Mb/s, Belden 8281, 280m - 0.2 - UI 2 - 360Mb/s, Belden 1694A, 190m - 0.25 - UI 2 - 360Mb/s, Belden 8281, 140m - 0.25 - UI 2 Output Rise/Fall time - 20% - 80% - 80 220 ps - Mismatch in rise/fall time - - - - 30 ps - Duty cycle distortion - - - - 100 ps - Overshoot - - - - 10 % - Maximum Equalized Cable Length GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 6 of 17 Table 2-3: AC Electrical Characteristics (Continued) Parameter Symbol Conditions Min Typ Max Units Notes Input Return Loss - - 15 - - dB - Input Resistance - single ended - 1.64 - k - Input Capacitance - single ended - 1 - pF - Output Resistance - single ended - 50 - - NOTES: 1. 0m cable length. 2. Equalizer Pathological. GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 7 of 17 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 eutectic reflow profile is shown in Figure 3-2. 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 (Preferred) 60-150 sec. Temperature 10-20 sec. 230C 220C 3C/sec max 183C 6C/sec max 150C 100C 25C Time 120 sec. max 6 min. max Figure 3-2: Standard Eutectic Solder Reflow Profile (Pb-free package) GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 8 of 17 4. Test Circuit GigaBERT 1400 EXT. CLOCK DATA CLOCK OUT OUT 8281 or 1694A CABLE 50/75 IN GS1574A/9074A TEST BOARD EXT. CLOCK 1.485GHz/270MHz OUT CH. 1 OUT CH. 2 TDS 820 EXT. TRIGGER Figure 4-1: Test Circuit GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 9 of 17 5. Input / Output Circuits 3k 3k SDI SDI RC 3.6k 3.6k Figure 5-1: Input Equivalent Circuit VCC 12.2k + MCLADJ - 150 Figure 5-2: MCLADJ Equivalent Circuit 50 50 SDO SDO Figure 5-3: Output Circuit GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 10 of 17 MUTE, BYPASS Figure 5-4: MUTE and BYPASS Circuits CD CD Figure 5-5: CD Circuit GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 11 of 17 6. Detailed Description The GS9074A is a high speed BiCMOS IC designed to equalize serial digital signals. The GS9074A can equalize SD serial digital signals, and will typically equalize greater than 350m at 270Mb/s. The GS9074A is powered from a single +3.3V power supply and consumes approximately 215mW of power. 6.1 Serial Digital Inputs 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. 6.2 Cable Equalization 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 50 as shown in Figure 6-1. +187.5mV VCM = 2.925V typical SDO -187.5mV SDO +187.5mV 50 50 VCM = 2.925V typical -187.5mV Figure 6-1: Typical Output Voltage Levels GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 12 of 17 6.3 Programmable Mute Output The GS9074A incorporates a programmable threshold output mute (MCLADJ). In applications where there are multiple input channels using the GS9074A, it is advantageous to have a programmable mute output to avoid signal crosstalk. The output of the GS9074A can be muted when the input signal decreases below a certain input level. This threshold is determined using the input voltage applied to the MCLADJ pin. 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 is only recommended for data rates up to 360Mb/s. 6.4 Mute and Carrier Detect The GS9074A includes a MUTE input pin that allows the application interface to mute the serial digital output at any time. Set the MUTE pin HIGH to mute SDO and SDO. In this case, the outputs will mute regardless of the setting of the BYPASS pin. A Carrier Detect output pin (CD) indicates the presence of a valid signal at the input of the GS9074A. When CD is LOW, the device has detected a valid input on SDI and SDI. When CD is HIGH, the device has not detected a valid input. NOTE: CD will only detect loss of carrier for data rates greater than 19Mb/s. The CD output pin may be connected directly to the MUTE input pin to enable automatic muting of the GS9074A when no valid input signal has been detected. NOTE: If the maximum cable length is exceeded and the device is not in bypass mode the GS1574A will not assert the CD pin even if a carrier is present. GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 13 of 17 7. Application Information 7.1 Typical Application Circuit CD MUTE VCC VCC 13 VCC_D 1 MUTE 6.2n CD VCC_A SDI 14 15 16 10n VEE_D VEE_A 2 SDI 3 VEE_A 5 6 7 MCLADJ 37R4 BYPASS 4 75 SDO SDI AGC 1u SDO GS9074A 75 AGC 1u 10n VEE_D 12 + 4u7 SDO 11 10 + SDO 9 4u7 8 MCLADJ 470n 470n BYPASS NOTE: All resistors in Ohms, capacitors in Farads, and inductors in Henrys, unless otherwise noted. Figure 7-1: GS9074A Typical Application Circuit GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 14 of 17 8. Package and Ordering Information 8.1 Package Dimensions A 2.76+/-0.10 0.40+/-0.05 4.00+/-0.05 DATUM A PIN 1 AREA 2X 2.76+/-0.10 4.00+/-0.05 B CENTER TAB DETAIL B 0.15 C DATUM B 0.15 C 2X 0.35+/-0.05 0.65 0.20 REF 16X 0.10 C C 0.10 CAB 0.05 C DATUM A OR B 16X 0.08 C SEATING PLANE 0.65/2 0.00-0.05 0.85+/-0.05 TERMINAL TIP 0.65 DETAIL B SCALE:NTS Figure 8-1: GS9074A Package Dimensions GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 15 of 17 8.2 Recommended PCB Footprint 0.35 0.65 0.55 3.70 2.76 CENTER PAD NOTE: All dimensions are in millimeters. 2.76 3.70 The Center Pad should be connected to the most negative power supply plane for analog circuitry in the device (VEE_A) by a minimum of 5 vias. Note: Suggested dimensions only. Final dimensions should conform to customer design rules and process optimizations. 8.3 Packaging Data Table 8-1: Packaging Data Parameter Value Package Type 4mm x 4mm 16-pin QFN Package Drawing Reference JEDEC M0220 Moisture Sensitivity Level 3 Junction to Case Thermal Resistance, j-c 31.0C/W Junction to Air Thermal Resistance, j-a (at zero airflow) 43.8C/W Psi 11.0C/W Pb-free and RoHS compliant Yes GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 16 of 17 8.4 Ordering Information Table 8-2: Ordering Information Part Number Package Temperature Range GS9074A GS9074ACNE3 16-pin QFN (490pc tray) 0C to 70C GS9074A GS9074ACTE3 16-pin QFN (250pcs tape & reel) 0C to 70C 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: corporate@gennum.com www.gennum.com CANADA JAPAN KK TAIWAN Suite 320, 3553 31st St. N.W. Calgary, Alberta T2L 2K7 Canada Shinjuku Green Tower Building 27F 6-14-1, Nishi Shinjuku Shinjuku-ku, Tokyo, 160-0023 Japan 6F-4, No.51, Sec.2, Keelung Rd. Sinyi District, Taipei City 11502 Taiwan R.O.C. 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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. (c) Copyright 2005 Gennum Corporation. All rights reserved. www.gennum.com GS9074A HD-LINX(R) II Adaptive Cable Equalizer Data Sheet 34166 - 5 December 2011 17 of 17 17