FMS6143A Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver Features Description The FMS6143A Low-Cost Video Filter (LCVF) is intended to replace passive LC filters and drivers with a th low-cost integrated device. Three 6 -order filters nd provide improved image quality compared to typical 2 rd and 3 -order passive solutions. th Three 6 -Order 8MHz (SD) Filter Drives Single AC- or DC-Coupled Video Loads (150Ω) Transparent Input Clamping Single Supply: 3.3V AC- or DC-Coupled Inputs and Outputs DC-Coupled Output Eliminates AC-Coupling Capacitor Robust 8.5kV ESD Protection Supply Voltage Range: 3.3V to 5.0V Lead-Free SOIC-8 Package Applications Cable Set-Top Boxes Satellite Set-Top Boxes DVD Players HDTV Personal Video Recorders (PVR) Video On Demand (VOD) The FMS6143A 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 AC-coupled inputs are required (see Applications section for details). The outputs can drive AC- or DC-coupled single (150Ω) or dual (75Ω) video loads. DC coupling the outputs removes the need for large output coupling capacitors. The input DC levels are offset approximately +280mV at the output (see Applications section for details). Related Applications Notes AN-8002 – FMS6418B 4:2:2 Application Note AN-6024 – FMS6xxx Product Series Understanding Analog Video Signal Clamps, Bias, DC Restore, and AC or DC coupling Methods AN-6041 – PCB Layout Considerations for Video Filter / Drivers Ordering Information Part Number Operating Temperature Range FMS6143ACSX -40°C to +85°C Package 8-Lead, Small Outline Integrated Circuit (SOIC) Eco Status Packing Method Quantity RoHS Reel 5000 For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 www.fairchildsemi.com FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver December 2009 IN1 Transparent Clamp 6d B OUT1 IN2 Transparent Clamp 6d B OUT2 IN3 Transparent Clamp 6d B OUT3 th Figure 1. Block Diagram Pin Configuration IN1 OUT1 Fairchild IN2 OUT2 FMS6143A IN3 OUT3 8-Lead SOIC VCC GND Figure 2. Pin Configuration Pin Definitions Pin # Name Type Description 1 IN1 Input Video Input Channel 1 2 IN2 Input Video Input Channel 2 3 IN3 Input Video Input Channel 2 4 Vcc Input Positive Power Supply 5 GND Input Device Ground Connection 6 OUT3 Output Filtered Output Channel 3 7 OUT2 Output Filtered Output Channel 2 8 OUT1 Output Filtered Output Channel 1 © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 2 FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver Block Diagram www.fairchildsemi.com Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit V VS DC Supply Voltage -0.3 6.0 VIO Analog and Digital I/O -0.3 VCC+0.3 V 50 mA Min. Unit VOUT Maximum Output Current, Do Not Exceed Electrostatic Discharge Information Symbol ESD Parameter Human Body Model, JESD22-A114 8.5 Charged Device Model, JESD22-C101 2.0 kV Reliability Information Symbol TJ Parameter Min. Typ. Junction Temperature TSTG Storage Temperature Range ΘJA Thermal Resistance, JEDEC Standard, Multilayer Test Boards, Still Air -65 Max. Unit +150 °C +150 °C 115 °C/W Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter Min. TA Operating Temperature Range -40 VCC Supply Voltage Range 3.14 © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 Typ. Max. Unit +85 °C 3.30 5.25 V FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver Absolute Maximum Ratings www.fairchildsemi.com 3 Unless otherwise noted; TA=25°C, VCC=3.3V, RS=37.5Ω; all inputs are AC coupled with 0.1µF; and all outputs are AC coupled with 220µF into 150Ω load. Symbol Parameter VS Supply Voltage Range ICC Quiescent Supply Current VIN PSRR Conditions VS Range Min. Typ. Max. Units 3.14 3.30 5.25 V VS=+3.3V, No Load 15 22 mA VS=+5.0V, No Load 19 24 mA Video Input Voltage Range Referenced to GND if DC Coupled 1.4 Vpp Power Supply Rejection Ratio DC (All Channels) -65 dB (1) Note: 1. 100% tested at TA=25°C. AC Electrical Characteristics Unless otherwise noted; TA=25°C, VCC=3.3V, RS=37.5Ω; all inputs are AC coupled with 0.1µF; and all outputs AC coupled with 220µF into 150Ω load. Symbol AV Parameter Conditions Channel Gain Active Video Input Range = 1VPP BW 0.1dB ±0.1dB Bandwidth(2) RSOURCE=75Ω, RL=150Ω BW -1.0dB -1.0 dB Bandwidth(2) RSOURCE=75Ω, RL=150Ω BW 3.0dB (2) Typ. Max. 5.8 6.0 6.2 Units dB 5.0 MHz 6.5 7.0 MHz RSOURCE=75Ω, RL=150Ω 7.5 8.0 MHz Normalized Stopband Attenuation(2) RSOURCE=75Ω, f=27MHz 45 60 dB DG Differential Gain - NTSC/PAL Active Video Input Range = 1VPP 0.6 % DP Differential Phase - NTSC/PAL Active Video Input Range = 1VPP 0.6 ° THD Total Harmonic Distortion f=1.00MHz; VOUT=1.4Vpp 0.2 % Xtalk Crosstalk (Channel to Channel) f=1.00MHz; VOUT=1.4Vpp -65 dB SNR Peak Signal to RMS Noise NTC-7 Weighting: 100kHz to 4.43MHz 74 dB Propagation Delay Delay from Input to Output: 100KHz to 4.43MHz 90 ns CLG Chroma-Luma Gain(2) 400KHz to 3.58MHz and 4.43MHz CLD Chroma-Luma Delay 400KHz to 3.58MHz and 4.43MHz Att27M tpd -3.0 dB Bandwidth Min. 95 100 5.0 105 % FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver DC Electrical Characteristics ns Note: 2. 100% tested at TA=25°C. © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 www.fairchildsemi.com 4 Unless otherwise noted, TA = 25°C, VCC = 3.3V, RS = 37.5Ω, and AC-coupled output into 150Ω load. Figure 3. Figure 4. © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 Frequency Response FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver Typical Performance Characteristics Frequency Response Flatness www.fairchildsemi.com 5 Unless otherwise noted, TA = 25°C, VCC = 3.3V, RS = 37.5Ω, and AC-coupled output into 150Ω load. © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 Figure 5. Delay vs. Frequecny Figure 6. Noise vs. Frequecny FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver Typical Performance Characteristics www.fairchildsemi.com 6 Unless otherwise noted, TA = 25°C, VCC = 3.3V, RS = 37.5Ω, and AC-coupled output into 150Ω load. Figure 7. Figure 8. Figure 9. © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 Differential Gain Differential Phase FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver Typical Performance Characteristics Chroma / Luma Gain & Delay www.fairchildsemi.com 7 DVD Player or STB +5V 0.1 uF 1 YOUT IN1 1.0 uF OUT1 8 IN2 Video SoC 3 Pr/CVOUT OUT2 FAIRCHILD FMS6143 8L SOIC IN3 OUT3 VCC GND 4 75Ω 220uF 7 Figure 10. 75Ω Video Cables Y Pb/C 75Ω 75Ω 6 Pr/CV 220uF 75Ω 5 DAC Load Resistors per SoC specs. © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 220uF 75Ω 2 Pb/COUT 75Ω AC-Coupling Caps are Optional. Typical Application FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver Applications Information www.fairchildsemi.com 8 75Ω Application Circuits The FMS6143A Low-Cost Video Filter (LCVF) provides 6dB gain from input to output. In addition, the input is slightly offset to optimize the output driver performance. The offset is held to the minimum required value to decrease the standing DC current into the load. Typical voltage levels are shown in Figure 11. Video Cables LOAD2 (optional) 75Ω 0.65 V YIN Driver 1.0 -> 1.02V YOUT LOAD1 75Ω Video Cables 75Ω Figure 12. Input Clamp Circuit 0.65 -> 0.67V I/O Configurations 0.3 -> 0.32V 0.0 -> 0.02V 2.28V 1.58V 0.88V 0.28V For a DC-coupled DAC drive with DC-coupled outputs, use this configuration: V IN V OUT Driven by: DC-Coupled DAC Outputs AC-Coupled and Clamped Y, CV, R, G, B 0V - 1.4V DVD or STB SoC DAC Output LCVF Clamp Inactive 75W There is a 280mV offset from the DC input level to the DC output level. V OUT = 2 * V IN + 280mV. Figure 13. DC-Coupled Inputs and Outputs 0.85V Alternatively, if the DAC’s average DC output level causes the signal to exceed the range of 0V to 1.4V, it can be AC coupled as: 0.5V 0.15V V IN 0V - 1.4V 1.98V DVD or STB SoC DAC Output Driven by: AC-Coupled and Biased U, V, Pb, Pr, C 1.28V 0.58V V OUT 0.1μ LCVF Clamp Active 75Ω Figure 11. Typical Voltage Levels The FMS6143A provides an internal diode clamp to support AC-coupled input signals. If the input signal does not go below ground, the input clamp does not operate. This allows DAC outputs to directly drive the FMS6143A without an AC coupling capacitor. When the input is AC coupled, the diode clamp sets the sync tip (or lowest voltage) just below ground. The worst-case sync tip compression due to the clamp cannot exceed 7mV. The input level set by the clamp, combined with the internal DC offset, keeps the output within its acceptable range. Figure 14. AC-Coupled Inputs, DC-Coupled Outputs When the FMS6143A is driven by an unknown external source or a SCART switch with its own clamping circuitry, the inputs should be AC coupled as shown in Figure 15. 0V - 1.4V External video source must be AC coupled For symmetric signals like Chroma, U, V, Pb, and Pr; the average DC bias is fairly constant and the inputs can be AC coupled with the addition of a pull-up resistor to set the DC input voltage. DAC outputs can also drive these same signals without the AC-coupling capacitor. A conceptual illustration of the input clamp circuit is shown in Figure 12. © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver Application Information 0.1μ LCVF Clamp Active 75Ω 75Ω Figure 15. SCART with DC-Coupled Outputs www.fairchildsemi.com 9 External video source must be AC coupled 75Ω External video source must be AC coupled 0V - 1.4V 0.1μ LCVF Clamp Active 75Ω 220μ 75Ω 0.1μ 7.5MΩ LCVF Bias Input 75Ω Figure 19. Biased SCART with AC-Coupled Outputs 500mV +/-350mV NOTE: The video tilt or line time distortion is dominated by the AC-coupling capacitor. The value may need to be increased beyond 220μF to obtain satisfactory operation in some applications. Figure 16. Biased SCART with DC-Coupled Outputs Power Dissipation The FMS6143A output drive configuration must be considered 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 power dissipation and internal temperature rise: The same circuits can be used with AC-coupled outputs if desired. 0V - 1.4V DVD or STB SoC DAC Output 0.1μ LCVF Clamp Active 75Ω 220μ TJ = TA + PD • θJA (1) where: PD = PCH1 + PCH2 + PCH3 and 2 PCHX = VCC • ICH - (VO /RL) (3) where: VO = 2VIN + 0.280V (4) ICH = (ICC/3) + (VO/RL) Figure 17. DC-Coupled Inputs, AC-Coupled Outputs (2) (5) VIN = RMS value of input signal ICC = 15mA VCC = 3.3V 0V - 1.4V DVD or STB SoC DAC Output 0.1μ LCVF Clamp Active 75Ω RL = channel load resistance. 220μ Board layout can also affect thermal characteristics. Refer to the Layout Considerations section for details. The FMS6143A is specified to operate with output currents typically less than 50mA, more than sufficient for a dual (75Ω) video load. Internal amplifiers are current limited to a maximum of 100mA and should withstand brief-duration short-circuit conditions. This capability is not guaranteed. Figure 18. AC-Coupled Inputs and Outputs © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver The same method can be used for biased signals, with the addition of a pull-up resistor to make sure the clamp never operates. The internal pull-down resistance is 800kΩ ±20%, so the external resistance should be 7.5MΩ to set the DC level to 500mV: www.fairchildsemi.com 10 quality output video signal, the series termination resistor must be placed as close to the device output pin as possible. This greatly reduces the parasitic capacitance and inductance effect on the output driver. The distance from the device pin to the series termination resistor should be no greater than 0.1 inches. General layout and supply bypassing play a major role in high-frequency performance and thermal characteristics. Fairchild offers a demonstration board to guide layout and aide 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. Recommended Routing/Layout Rules Do not run analog and digital signals in parallel. Traces should run on top of the ground plane at all times. No trace should run over ground/power splits. Include 10μF and 0.1μF ceramic power supply bypass 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. For multi-layer boards, use a large ground plane to help dissipate heat. For two-layer boards, use a ground plane that extends beyond the device body at least 0.5 inches on all sides. Include a metal paddle under the device on the top layer. Use separate analog and digital power planes to supply power. Figure 20. Termination Resistor Placement Avoid routing at 90-degree angles. Minimize clock and video data trace length differences. Thermal Considerations Since the interior of most systems; such as set-top boxes, TVs, and DVD players; are at TA=+70ºC; consideration must be given to providing an adequate heat sink for the device package for maximum heat 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) or below (bottom plane), each other on the PCB. PCB Thermal Layout Considerations Minimize all trace lengths to reduce series inductance. Output Considerations The FMS6143A outputs are DC offset from the input by 150mV; therefore, VOUT = 2 x VIN DC + 150mV. 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 FMS6143A 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 input impedance and the leakage current of the input being driven. To obtain the highest © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 Understand the system power requirements and environmental conditions. Maximize thermal performance of the PCB. Make the PCB as thin as possible by reducing FR4 thickness. Use vias in the power pad to tie adjacent layers together. Remember that baseline temperature is a function of board area, not copper thickness. Modeling techniques provide a first-order approximation. Consider using 70μm of copper for high-power designs. FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver Layout Considerations www.fairchildsemi.com 11 5.00 4.80 A 0.65 3.81 8 5 B 1.75 6.20 5.80 PIN ONE INDICATOR 4.00 3.80 1 5.60 4 1.27 (0.33) 1.27 0.25 C B A LAND PATTERN RECOMMENDATION SEE DETAIL A 0.25 0.10 1.75 MAX 0.25 0.19 C 0.51 0.33 0.10 C OPTION A - BEVEL EDGE 0.50 x 45° 0.25 R0.10 GAGE PLANE R0.10 OPTION B - NO BEVEL EDGE 0.36 NOTES: UNLESS OTHERWISE SPECIFIED 8° 0° 0.90 0.40 A) THIS PACKAGE CONFORMS TO JEDEC MS-012, VARIATION AA, ISSUE C, B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS DO NOT INCLUDE MOLD FLASH OR BURRS. D) LANDPATTERN STANDARD: SOIC127P600X175-8M. E) DRAWING FILENAME: M08AREV13 SEATING PLANE (1.04) DETAIL A FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver Physical Dimensions SCALE: 2:1 Figure 21. 8-Lead, Small Outline Integrated Circuit (SOIC) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 www.fairchildsemi.com 12 FMS6143A — Low-Cost Three-Channel 6th-Order Standard Definition Video Filter Driver © 2009 Fairchild Semiconductor Corporation FMS6143A • Rev. 1.0.0 www.fairchildsemi.com 13