GS9074A

GS9074A HD-LINX® II Adaptive Cable Equalizer Features • • • • • • • • • • • • • SMPTE 259M compliant Automatic cable equalization Multi-standard operation from 143Mb/s to 360Mb/s 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) Performance optimized for 270Mb/s Typical maximum equalized length of Belden 1694A cable: 350m at 270Mb/s 50Ω differential output (with internal 50Ω pull-ups) Manual output mute or programmable mute based on max cable length adjust Single 3.3V power supply operation Operating temperature range: 0°C to +70°C Description The GS9074A is a second-generation high speed BiCMOS integrated circuit designed to equalize and restore signals received over 75Ω co-axial cable. 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. 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. 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 • SMPTE 259M Coaxial Cable Serial Digital Interfaces MCLADJ CABLE LENGTH ADJUSTOR CARRIER DETECT MUTE CD MUTE BYPASS SDI SDI EQUALIZER DC RESTORE OUTPUT SDO SDO AGC Figure A: GS9074A Functional Block Diagram GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 www.gennum.com 1 of 17 Proprietary & Confidential Revision History Version 4 3 ECR 153754 139635 PCN – 38695 Date November 2009 March 2006 Changes and/or Modifications Updated to latest Gennum template. Corrected pad standoff height and tolerances for pad width and package dimension. Corrected pad shape. Converted to Data Sheet. Corrected process to BiCMOS. 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. 2 1 0 138357 137888 136165 37278 – – November 2005 September 2005 March 2005 A 135927 – February 2005 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® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 2 of 17 Proprietary & Confidential 1. Pin Out 1.1 GS9074A Pin Assignment VCC_A MUTE VCC_D 13 12 VEE_D 11 GS9074A (top view) SDI 3 10 SDO CD 15 16 VEE_A 1 14 SDI 2 SDO VEE_A 4 5 AGC 6 AGC 7 BYPASS 8 MCLADJ 9 VEE_D Center Pad (bottom of package, internally bonded to VEE_A) Figure 1-1: 16-Pin QFN 1.2 GS9074A Pin Descriptions Table 1-1: Pin Descriptions Pin Number 1, 4 Name VEE_A Timing Analog Type Power Description Most negative power supply for analog circuitry. Connect to GND. 2, 3 5, 6 SDI, SDI AGC, AGC Analog Analog Input – Serial digital differential input. External AGC capacitors. (See Section 7.1 Typical Application Circuit.) 7 BYPASS Not Synchronous 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. 8 MCLADJ Input GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 3 of 17 Proprietary & Confidential Table 1-1: Pin Descriptions (Continued) Pin Number 9 Name VEE_D Timing Analog Type Power Description Most negative power supply for the digital circuitry and output buffer. Connect to GND. 10, 11 12 SDO, SDO VEE_D Analog Analog Output Power Equalized serial digital differential output. 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 – Power Internally bonded to VEE_A. GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 4 of 17 Proprietary & Confidential 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 Supply Voltage Input ESD Voltage Storage Temperature Range Input Voltage Range (any input) Operating Temperature Range Reflow Temperature Supply Voltage Value -0.5V to +3.6 VDC 2kV -50°C < Ts < 125°C -0.3 to (VCC +0.3)V 0°C to 70°C 260°C -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 = 0°C to 70°C, unless otherwise shown. Table 2-2: DC Electrical Characteristics Parameter Supply Voltage Power Consumption Supply Current Output Common Mode Voltage Input Common Mode Voltage MCLADJ DC Voltage (to mute signal) MCLADJ Range Symbol VCC PD Is VCMOUT Conditions – TA = 25°C TA = 25°C TA = 25°C Min 3.135 – – – Typ 3.3 215 65 VCC ΔVSDO/2 1.75 Max 3.465 – – – Units V mW mA V Notes ±5% – – – VCMIN – TA = 25°C 0m, TA = 25°C TA = 25°C – – V – – 1.3 – V – – – 0.4 – V – GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 5 of 17 Proprietary & Confidential Table 2-2: DC Electrical Characteristics (Continued) Parameter CD Output Voltage Symbol VCD(OH) VCD(OL) Conditions Carrier not present Carrier present Min to Mute Min 2.4 Typ – Max – Units V Notes – – 2.0 – – 0.4 – V V – – Mute Input Voltage Required to Force Outputs to Mute Mute Input Voltage Required to Force Outputs Active VMute VMute Max to Activate – – 0.8 V – 2.3 AC Electrical Characteristics Table 2-3 shows the AC electrical characteristics of the GS9074A where conditions are VDD = 3.3V, TA = 0°C to 70°C, unless otherwise shown. Table 2-3: AC Electrical Characteristics Parameter Serial input data rate Input Voltage Swing Symbol DRSDO ΔVSDI ΔVSDO Conditions – TA =25°C, differential 100Ω load, TA =25°C, differential 270Mb/s, Belden 1694A, 350m 270Mb/s, Belden 8281, 280m 360Mb/s, Belden 1694A, 190m 360Mb/s, Belden 8281, 140m 20% - 80% – – – Min 143 720 Typ – 800 Max 360 950 Units Mb/s mVp-p mVp-p Notes – 1 Output Voltage Swing – 750 – – Maximum Equalized Cable Length – – 0.2 – UI 2 – – 0.2 – UI 2 – – 0.25 – UI 2 – – 0.25 – UI 2 Output Rise/Fall time Mismatch in rise/fall time Duty cycle distortion Overshoot – – – – – – – – 80 – – – 220 30 100 10 ps ps ps % – – – – GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 6 of 17 Proprietary & Confidential Table 2-3: AC Electrical Characteristics (Continued) Parameter Input Return Loss Input Resistance Input Capacitance Output Resistance NOTES: 1. 0m cable length. 2. Equalizer Pathological. Symbol – – – – Conditions – single ended single ended single ended Min 15 – – – Typ – 1.64 1 50 Max – – – – Units dB kΩ pF Ω Notes – – – – GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 7 of 17 Proprietary & Confidential 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. 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) Temperature 60-150 sec. 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 Eutectic Solder Reflow Profile (Pb-free package) GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 8 of 17 Proprietary & Confidential 4. Test Circuit GigaBERT 1400 EXT. CLOCK DATA CLOCK OUT OUT 50/75 8281 or 1694A CABLE IN GS1574A/9074A TEST BOARD OUT OUT CH. 1 CH. 2 TDS 820 EXT. TRIGGER EXT. CLOCK 1.485GHz/270MHz Figure 4-1: Test Circuit GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 9 of 17 Proprietary & Confidential 5. Input / Output Circuits 3k SDI RC 3.6k 3k SDI 3.6k Figure 5-1: Input Equivalent Circuit VCC 12.2k + MCLADJ - 150µ Figure 5-2: MCLADJ Equivalent Circuit 50 50 SDO SDO Figure 5-3: Output Circuit GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 10 of 17 Proprietary & Confidential MUTE, BYPASS Figure 5-4: MUTE and BYPASS Circuits CD CD Figure 5-5: CD Circuit GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 11 of 17 Proprietary & Confidential 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 50Ω as shown in Figure 6-1. +187.5mV VCM = 2.925V typical SDO -187.5mV SDO 50 50 +187.5mV VCM = 2.925V typical -187.5mV Figure 6-1: Typical Output Voltage Levels GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 12 of 17 Proprietary & Confidential 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® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 13 of 17 Proprietary & Confidential 7. Application Information 7.1 Typical Application Circuit CD MUTE VCC VCC 16 15 14 13 VCC_A VCC_D MUTE CD 10n SDI 6.2n 1 VEE_A 1u 75 1u 3 SDI 2 SDI 10n VEE_D 12 + 4u7 SDO GS9074A SDO 11 SDO 10 + SDO BYPASS MCLADJ 4 75 37R4 VEE_A VEE_D 9 4u7 AGC AGC 5 470n 6 7 8 MCLADJ 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® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 14 of 17 Proprietary & Confidential 8. Package and Ordering Information 8.1 Package Dimensions 4.00+/-0.05 DATUM A B 0.40+/-0.05 A 2.76+/-0.10 PIN 1 AREA 4.00+/-0.05 CENTER TAB DETAIL B 2X 2X 0.15 C 0.15 C DATUM B 0.65 16X 0.20 REF 0.35+/-0.05 0.10 CAB 0.05 C C 0.10 C 16X 0.08 C SEATING PLANE 0.85+/-0.05 0.00-0.05 DATUM A OR B 0.65/2 TERMINAL TIP 0.65 DETAIL B SCALE:NTS Figure 8-1: GS9074A Package Dimensions GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 15 of 17 Proprietary & Confidential 2.76+/-0.10 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 Package Type Package Drawing Reference Moisture Sensitivity Level Junction to Case Thermal Resistance, θ j-c Junction to Air Thermal Resistance, θj-a (at zero airflow) Psi Pb-free and RoHS compliant Value 4mm x 4mm 16-pin QFN JEDEC M0220 3 31.0°C/W 43.8°C/W 11.0°C/W Yes GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 16 of 17 Proprietary & Confidential 8.4 Ordering Information Table 8-2: Ordering Information Part Number GS9074A GS9074ACNE3 Package 16-pin QFN Temperature Range 0°C to 70°C DOCUMENT IDENTIFICATION CAUTION ELECTROSTATIC SENSITIVE DEVICES DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION 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. 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Sinyi District, Taipei City 11502 Taiwan R.O.C. Phone: (886) 2-8732-8879 Fax: (886) 2-8732-8870 E-mail: gennum-taiwan@gennum.com 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 2005 Gennum Corporation. All rights reserved. www.gennum.com GS9074A HD-LINX® II Adaptive Cable Equalizer Data Sheet 34166 - 4 November 2009 17 of 17 17 Proprietary & Confidential