FMS6141 Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Features Description Single 4th-Order 8MHz (SD) Filter Drives Dual, AC- or DC-coupled, Video Loads (2Vpp, 75 Ω) The FMS6141 Low-Cost Video Filter is intended to replace passive LC filters and drivers with a low-cost integrated device. The 4th-order filter provides improved image quality compared to typical 2nd or 3rd-order passive solutions. Transparent Input Clamping Single Supply Drives Single, AC- or DC-coupled, Video Loads (2Vpp, 150Ω) AC- or DC-Coupled Input AC- or DC-Coupled Output DC-Coupled Output Eliminates AC-Coupling Capacitors The FMS6141’s output can drive an AC- or DC-coupled single (150 Ω) or dual (75 Ω) load. DC-coupling the output removes the need for output coupling capacitors. The input DC level is offset approximately +280mV at the output (see Application Information for details). Robust 10kV ESD Protection Lead-Free Packages: SOIC-8 or SC70-5 Applications The FMS6141 may be directly driven by a DC-coupled DAC output or an AC-coupled signal. Internal diode clamps and bias circuitry may be used if an AC-coupled input is required (see Application Information for details). Cable Set-Top Boxes Satellite Set-Top Boxes Related Applications Notes AN-6041 PCB Layout Considerations for Video Filter / Drivers AN-6024 FMS6xxx Product Series Understanding Analog Video Signal Clamps, Bias, DC-Restore, and AC or DC Coupling Methods DVD Players HDTVs Personal Video Recorders (PVR) Video On Demand (VOD) Functional Block Diagram VIDEOIN Transparent Clamp 2X VIDEOOUT 8MHz, 4th-order Figure 1. FMS6141 Block Diagram © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 www.fairchildsemi.com FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver November 2006 Package Pb-Free Operating Temperature Range Packing Method FMS6141CS SOIC-8 Yes -40°C to +85°C Tube FMS6141CSX SOIC-8 Yes -40°C to +85°C Tape and Reel FMS6141S5X SC70-5 Yes -40°C to +85°C Tape and Reel Part Number Pin Configurations VIN 1 N/C 2 GND 3 N/C 4 FMS6141 SOIC-8 8 VOUT 7 VCC GND 1 6 N/C GND 2 5 N/C VCC 4 VOUT FMS6141 SC70-5 VIN 3 Figure 2. FMS6141 SOIC-8 5 Figure 3. FMS6141 SC70 Pin Definitions Pin # Name Description 1 VIN Video input Pin# Name 2 N/C No connect 1 GND Must be connected to ground 3 GND Must be connected to ground 2 GND Must be connected to ground 4 N/C No connect 3 VIN 5 N/C No connect 4 VOUT Filtered video output 6 N/C No connect 5 VCC +5V supply, do not float 7 VCC +5V supply, do not float 8 VOUT Filtered video output Description Video input FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Ordering Information Table 2. SC70 Pin Definitions Table 1. SOIC Pin Definitions © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 www.fairchildsemi.com 2 The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table defines the conditions for actual device operation. Parameter Min. Max. Unit DC Supply Voltage -0.3 6.0 V Analog and Digital I/O -0.3 VCC +0.3 V 50 mA Typ. Max. Unit 85 °C 5.0 5.25 V SOIC-8 SC70-5 Unit Human Body Model (HBM) 8 10 kV Charge Device Model (CDM) 2 2 kV Output Current, Do Not Exceed Recommended Operating Conditions Parameter Min. Operating Temperature Range -40 VCC Range 4.75 ESD Information Package Reliability Information Symbol TJ TSTG Parameter Min. Typ. Junction Temperature Storage Temperature Range -65 TL Lead Temperature (Soldering, 10s) ΘJA Thermal Resistance (JEDEC Standard Multi-Layer Test Boards, Still Air) © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 Max. Unit 150 °C 150 °C 300 °C SOIC-8 115 °C/W SC70-5 332 °C/W FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Absolute Maximum Ratings www.fairchildsemi.com 3 TA = 25°C, VCC = 5.0V, RS = 37.5Ω; input is AC coupled with 0.1µF; output is AC coupled with 220µF into a 150Ω load; unless otherwise noted. Symbol Parameter (1) Conditions Min. Max. Unit 7 12 mA ICC Supply Current VIN Video Input Voltage Range Referenced to GND if DCcoupled 1.4 Vpp Power Supply Rejection Ratio DC 40 dB PSRR No load Typ. Note: 1. 100% tested at 25°C. AC Electrical Specifications TA = 25°C, VCC = 5.0V, RS = 37.5Ω; input is AC coupled with 0.1µF; output is AC coupled with 220µF into a 150Ω load; unless otherwise noted. Symbol AV Parameter Conditions (1) Channel Gain (1) f1dB -1dB Bandwidth fC -3dB Bandwidth Typ. Max. Unit 5.6 6.0 6.4 dB 4.0 6.5 MHz 7.7 MHz fSB Attenuation (Stopband Reject) 42 dB dG Differential Gain 0.4 % dφ Differential Phase 0.4 ° THD SNR tpd f = 27MHz Min. Output Distortion (all channels) VOUT = 1.8Vpp, 1MHz 0.4 % Signal-to-Noise Ratio NTC-7 weighting; 100kHz to 4.2MHz 75 dB Propagation Delay Delay from input to output, 4.5MHz 55 ns Note: 1. 100% tested at 25°C. © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver DC Specifications www.fairchildsemi.com 4 Input Considerations below ground. The input level set by the clamp, combined with the internal DC offset, keeps the output signal within an acceptable range. This clamp feature also allows the FMS6141’s input to be directly driven (DC-coupled) by a ground referenced DAC output. Figure 4 shows typical DC voltage levels for the input and output signals when driven by a DC-coupled DAC output or an AC-coupled and clamped Y, CV signal. The FMS6141 Low-Cost Video Filter provides 6dB (2X) gain from input to output. The device provides an internal diode clamp to support AC-coupled input signals. In this configuration, a 0.1µF ceramic capacitor is used to AC couple the input signal. If the input signal does not go below ground, the clamp is inactive; but if the input signal goes below ground, the clamp circuitry sets the bottom of the sync tip (or lowest voltage) to just 1.0 -> 1.02V 2.28V 0.65 -> 0.67V 1.58V 0.3 -> 0.32V 0.0 -> 0.02V 0.88V 0.28V Vin Vout Figure 4. Typical DC Voltage Levels Output Considerations parasitic capacitance and inductance effects on the FMS6141’s output driver. The distance from the device’s pin to the series termination resistor should be no greater than 0.1 inches, as shown in Figure 5. The FMS6141’s output is DC offset from the input by 280mv; therefore VOUT = 2 • VIN+280mv. This offset is required to obtain optimal performance from the output driver and is held at the minimum value to decrease the standing DC current into the load. Since the FMS6141 has a 2x (6dB) gain, the output is typically connected via a 75Ω-series, back-matching resistor followed by the 75Ω video cable. Due to the inherent divide-by-two of this configuration, the blanking level at the load of the video signal is always less than 1V. When AC-coupling the output, ensure that the coupling capacitor of choice passes the lowest frequency content in the video signal and that line time distortion (video tilt) is kept as low as possible. The selection of the coupling capacitor is a function of the subsequent circuit’s input impedance and the leakage current of the input being driven. To obtain the highest quality output video signal, the series termination resistor must be placed as close to the device’s output pin as possible. This greatly reduces © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Application Information Figure 5. Resistor Placement www.fairchildsemi.com 5 signal. The coupling capacitor and the input termination resistor at the input of the filter/driver should be placed close to the input pin for optimal signal integrity. Figure 6 shows a typical AC-coupled input configuration for driving the filter/driver. Using this configuration, a 0.1µF ceramic capacitor is used to AC couple the input 0.1µF Clamp / Bias Input RTERM Buf LPF Termination & coupling close to device input Figure 6. Typical Input Configuration 75Ω 75Ω Video Cables 75Ω 0.65V Driver YIN YOUT LOAD2 (optional) 75Ω 75Ω 800 K ohms Figure 7. Conceptual Illustration — Input Clamp Circuit and Output Driver Connected to Drive Single or Dual Video Loads 0V - 1.4V LCVF Clamp Mode DVD SoC LOAD1 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver I/O Configurations 75 RTERM Figure 8. DC-Coupled Input and DC-Coupled Output © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 www.fairchildsemi.com 6 0V - 1.4V 75 LCVF Clamp Mode DVD SoC RTERM Figure 9. AC-Coupled Input and DC-Coupled Output 0V - 1.4V LCVF Clamp Mode DVD SoC 75 220µF RTERM Figure 10. DC-Coupled Input and AC-Coupled Output 0.1µ 0V - 1.4V LCVF Clamp Mode DVD SoC 75 220µF FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver 0.1µ RTERM Figure 11. AC-Coupled Input and AC-Coupled Output © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 www.fairchildsemi.com 7 dissipation. When designing a system board, determine how much power each device dissipates. Ensure that devices of high power are not placed in the same location, such as directly above (top plane) and below (bottom plane) each other on the PCB. General layout and supply bypassing play a major role in high-frequency performance and thermal characteristics. Fairchild offers a demonstration board for the FMS6141 to guide layout and aid device evaluation. The demo board is a four-layer board with full power and ground planes. Following this layout configuration provides optimum performance and thermal characteristics for the device. For the best results, follow the steps and recommended routing rules listed below. PCB Thermal Layout Considerations Understand the system power requirements and environmental conditions. Recommended Routing/Layout Rules Maximize thermal performance of the PCB. Do not run analog and digital signals in parallel. Consider Use separate analog and digital power planes to supply power. Traces Make the PCB as thin as possible by reducing FR4 thickness. should run on top of the ground plane at all Use vias in power pad to tie adjacent layers together. times. Remember that baseline temperature is a function of No trace should run over ground/power splits. board area, not copper thickness. Avoid routing at 90-degree angles. Minimize clock differences. and video data Modeling trace techniques approximation. length can provide a first-order Power Dissipation Include 10µF and 0.1µF ceramic power supply bypass Consider the FMS6141’s output drive configuration when calculating overall power dissipation. Care must be taken not to exceed the maximum die junction temperature. The following example can be used to calculate the FMS6141’s power dissipation and internal temperature rise. capacitors. Place the 0.1µF capacitor within 0.1 inches of the device power pin. Place the 10µF capacitor within 0.75 inches of the device power pin. TJ = TA + PCHANNEL ΘJA where PCHANNEL = VCC • ICH + (VO2/RL) VO = 2VIN + 0.280V ICH = ICC + (VO/RL) VIN = RMS value of input signal ICC = 7mA VS = 5V RL = channel load resistance For multilayer boards, use a large ground plane to help dissipate heat. For two-layer boards, use a ground plane that extends beyond the device body by at least 0.5 inches on all sides. Include a metal paddle under the device on the top layer. Minimize all trace lengths to reduce series inductance. The FMS6141 is specified to operate with output currents typically less than 50mA, which is more than sufficient for a dual (75Ω) video load. The internal amplifiers of the FMS6141 are current limited to a maximum of 100mA and can withstand a brief-duration short-circuit condition, but this capability is not guaranteed. Thermal Considerations Since the interior of most systems, such as set-top boxes, TVs, and DVD players are at +70ºC; consideration must be given to providing an adequate heat sink for the device package for maximum heat © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 using 70µm of copper for high-power designs. FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Layout Considerations www.fairchildsemi.com 8 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Physical Dimensions Dimensions are in millimeters unless otherwise noted. Figure 12. SOIC-8 Package © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 www.fairchildsemi.com 9 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. Figure 13. SC70-5 Package © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 www.fairchildsemi.com 10 ACEx™ ActiveArray™ Bottomless™ Build it Now™ CoolFET™ CROSSVOLT™ DOME™ EcoSPARK™ 2 E CMOS™ EnSigna™ ® FACT FACT Quiet Series™ ® FAST FASTr™ FPS™ FRFET™ GlobalOptoisolator™ GTO™ HiSeC™ 2 I C™ i-Lo™ ImpliedDisconnect™ IntelliMAX™ ISOPLANAR™ LittleFET™ MICROCOUPLER™ MicroFET™ MicroPak™ MICROWIRE™ MSX™ MSXPro™ OCX™ OCXPro™ ® OPTOLOGIC OPTOPLANAR™ PACMAN™ POP™ Power247™ PowerEdge™ PowerSaver™ ® PowerTrench ® QFET QS™ QT Optoelectronics™ Quiet Series™ RapidConfigure™ RapidConnect™ ScalarPump™ μSerDes™ ® SILENT SWITCHER SMART START™ SPM™ Stealth™ SuperFET™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 SyncFET™ TCM™ TinyBoost™ TinyBuck™ ® TinyLogic TINYOPTO™ TinyPower™ TinyPWM™ TruTranslation™ ® UHC ® UltraFET UniFET™ VCX™ Wire™ Across the board. Around the world.™ Programmable Active Droop™ ® The Power Franchise DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Preliminary First Production This datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only. FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. Definition Rev. I21 © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.0 www.fairchildsemi.com 11