FMS6646MTC20X

FMS6646 — Six Channel, 6th-Order SD/HD 1080p Video Filter Driver July 2009 FMS6646 Six Channel, SD/HD (1080p) Video Filter Driver Features Three Selectable 8/75MHz (SD/HD 1080p) Filters Three Fixed 8MHz (SD) Filters Transparent Input Clamping Single Video Load Drive (2VPP, 150Ω, AV = 6dB) AC- or DC-Coupled Inputs AC- or DC-Coupled Outputs DC-Coupled Outputs Eliminate AC-Coupling Capacitors Low-Power Robust Output ESD Protection: 9kV HBM Description The FMS6646 Low Cost Video Filter (LCVF) is intended to replace passive LC filters and drivers with a low-cost integrated device. Six Butterworth filters provide improved image quality compared to typical passive solutions. The combination of low-power StandardDefinition (SD) and High-Definition (HD 1080p) filters greatly simplifies DVD video output circuitry. Three channels offer fixed SD filters, while the other three are selectable between SD and HD filters. The FMS6646 offers a fixed gain of 6dB. The FMS6646 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 the Applications Information section for details). The outputs can drive AC- or DC-coupled single (150Ω) video loads. DC-coupling the outputs removes the need for output coupling capacitors. The input DC levels are offset approximately +280mV at the output. Applications Cable and Satellite Set-Top Boxes DVD Players HDTV Personal Video Recorders (PVR) Video On Demand (VOD) Ordering Information Part Number FMS6646MTC20X Operating Temperature Range -40°C to +85°C Gain Setting 6dB Eco Status RoHS Package TSSOP-20 Packing Method 2500 / Reel For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html Figure 1. Block Diagram © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev. 1.0.1 www.fairchildsemi.com FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p Pin Configuration SD IN1 SD IN2 SD IN3 N/C VCC FcSEL SD/HD IN1 SD/HD IN2 SD/HD IN3 N/C 1 2 3 4 5 6 7 8 9 10 20 19 SD OUT1 SD OUT2 SD OUT3 GND GND N/C SD/HD OUT1 SD/HD OUT2 SD/HD OUT3 N/C FMS6646 20L TSSOP 18 17 16 15 14 13 12 11 Figure 2. Pin Configuration Pin Definitions Pin# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name SD IN1 SD IN2 SD IN3 N/C VCC FcSEL SD/HD IN1 SD/HD IN2 SD/HD IN3 N/C N/C SD/HD OUT3 SD/HD OUT2 SD/HD OUT1 N/C GND GND SD OUT3 SD OUT2 SD OUT1 Type Input Input Input Input Input Input Input Input Input Input Input Output Output Output Input Input Input Output Output Output Description SD video input, channel 1 SD video input, channel 2 SD video input, channel 3 No Connection +3.3V supply Selects filter corner frequency for pins 7, 8, and 9: “0” = SD, “1” = PS Selectable SD or PS video input, channel 1 Selectable SD or PS video input, channel 2 Selectable SD or PS video input, channel 3 No Connection No Connection Filtered SD or PS video output, channel 3 Filtered SD or PS video output, channel 2 Filtered SD or PS video output, channel 1 No Connection Must be tied to ground Must be tied to ground Filtered SD video output, channel 3 Filtered SD video output, channel 2 Filtered SD video output, channel 1 © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev.1.0.1 www.fairchildsemi.com 2 FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p Absolute Maximum Ratings 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 VCC VIO IOUT DC Supply Voltage Analog and Digital I/O Parameter Min. -0.3 -0.3 Max. 6.0 VCC+0.3 50 Unit V V mA Output Current, Any One Channel, Do Not Exceed Reliability Information Symbol TJ TSTG TL ΘJA Junction Temperature Storage Temperature Range Reflow Temperature Thermal Resistance, JEDEC Standard Multi-Layer Test Boards, Still Air 74 -65 Parameter Min. Typ. Max. +150 +150 +260 Unit °C °C °C °C/W Electrostatic Discharge Information Symbol ESD Parameter Human Body Model, JESD22-A114 Charged Device Model, JESD22-C101 Max. 9 2 Unit kV 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 TA VCC Parameter Operating Temperature Range Supply Voltage Range Min. -40 3.135 Typ. 3.30 Max. +85 5.25 Unit °C V DC Electrical Characteristics Unless otherwise noted, TA=25°C, VCC=3.3V, RSOURCE=37.5Ω, inputs AC coupled with 0.1µF, all outputs AC coupled with 220µF into 150Ω loads, referenced to 400kHz. Symbol ICC VIN VIL VIH Parameter Supply Current (1) Conditions No Load Referenced to GND if DC Coupled FcSEL FcSEL Min. Typ. 80 1.4 Max. 95 Units mA VPP Video Input Voltage Range Digital Input Low (1) (1) 0 2.4 0.8 VCC V V Digital Input High Note: 1. 100% tested at 25°C. © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev.1.0.1 www.fairchildsemi.com 3 FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p Standard-Definition (480i) Electrical Characteristics Unless otherwise noted, TA=25°C, VIN=1VPP, VCC=3.3V, RSOURCE=37.5Ω, all inputs AC coupled with 0.1µF, all outputs AC coupled with 220µF into 150Ω loads, referenced to 400kHz. Symbol AVSD f01dBSD f1dBSD fcSD fSBSD DG DP THD XTALKSD SNR tpdSD CLGSD CLDSD Parameter Channel Gain (2) Conditions All SD Channels All SD Channels All SD Channels Min. 5.8 5.5 6.5 50 Typ. 6.0 5.5 7.15 8.0 60 0.5 0.3 0.25 -70 72 90 100 6 Max. 6.2 Units dB MHz MHz MHz dB % ° % dB dB ns % ns -0.1dB Flatness -1dB Flatness (2) (2) (2) -3dB Bandwidth All SD Channels All SD Channels at f=27MHz All SD Channels All SD Channels VOUT=1.4VPP, 3.58MHz 1MHz (3) Attenuation (Stopband Reject) Differential Gain Differential Phase Total Harmonic Distortion, Output Crosstalk (ch-to-ch) Signal-to-Noise Ratio Propagation Delay Chroma Luma Gain Chroma Luma Delay NTC-7 weighting, 100kHz to 4.2MHz Delay from input to output, 4.5MHz f=3.58MHz (refer to SDIN at 400kHz) f=3.58MHz (refer to SDIN at 400kHz) Notes: 2. 100% tested at 25°C. 3. SNR=20 • log (714mV / rms noise). High-Definition (1080p) Electrical Characteristics Unless otherwise noted, TA=25°C, VIN=1VPP, VCC=3.3V, RSOURCE=37.5Ω, all inputs AC coupled with 0.1µF, all outputs AC coupled with 220µF into 150Ω loads, referenced to 400kHz. Symbol AVHD f1dBHD fcHD fsbHD THD XTALKHD SNR tpdHD Parameter Channel Gain (4) (4) (4) (4) Conditions All HD Channels All HD Channels All HD Channels All HD Channels, f=148MHz All HD Channels, VOUT=1.4VPP, 22MHz 1MHz Unweighted; 100kHz to 70MHz Delay from input to output Min. 5.8 55 70 15 Typ. 6.0 65 75 20 0.2 -72 70 6 Max. 6.2 Units dB MHz MHz dB % dB dB ns -1dB Bandwidth -3dB Bandwidth Attenuation Stopband Reject Total Harmonic Distortion, Output Crosstalk (ch-to-ch) Signal-to-Noise Ratio Propagation Delay (5) Notes: 4. 100% tested at 25°C. 5. SNR=20 • log (714mV / rms noise). © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev.1.0.1 www.fairchildsemi.com 4 FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p Typical Performance Characteristics Figure 3. 0.5 0.0 -0.5 FMS6646 SD Frequency Response Attenuation (dB) -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 4. 1 3. 7 2. 5 2. 9 1. 3 1. 7 2. 1 3. 3 4. 5 Frequency (MHz) Figure 4. 5 0 FMS6646 SD Frequency Response (Flatness) Attenuation (dB) -5 -10 -15 -20 -25 -30 © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev.1.0.1 8. 2 16 .3 24 .4 32 .5 40 .6 48 .7 56 .8 64 .9 73 .0 81 .1 89 .2 97 .2 10 5. 3 11 3. 4 12 1. 5 12 9. 6 13 7. 7 14 5. 8 15 3. 9 16 2. 0 17 0. 1 17 8. 2 Frequency (MHz) 0. 1 Figure 5. FMS6646 HD Frequency Response 8. 1 0. 1 5. 3 0. 9 5. 7 0. 5 4. 9 6. 1 6. 5 6. 9 7. 3 7. 7 www.fairchildsemi.com 5 FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p Typical Performance Characteristics (Continued) Figure 6. FMS6646 HD Frequency Response (Flatness) Figure 7. Differential Gain Figure 8. Differential Phase © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev.1.0.1 www.fairchildsemi.com 6 FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p Typical Application DVD Player or STB 0.1 µF 10.0 µF +5V Y1 OUT 1 SD IN1 SD OUT1 20 75 Ω 220µF 75 Ω Video Cable s 75 Ω Y1 2 C OUT 3 SD IN2 SD OUT2 19 75 Ω 220µF 75 Ω C CV OUT SD IN3 SD OUT3 18 75 Ω 220µF 75 Ω CV 4 N/C GND 16, 17 Video SoC 5 Vcc 75 Ω 220µF 75 Ω Video Cable s 75 Ω 8 SD/HD IN2 SD/HD OUT2 75 Ω 9 SD/HD IN3 N/C 15 SD/HD OUT3 12 F cSEL 6 75 Ω 220µF 75 Ω 13 75 Ω 220µF G/Y2 OUT 7 SD/HD IN1 SD/HD OUT1 14 Y2/G B/Pb OUT Pb/B R/Pr OUT Pr/R DAC load resistors AC-coupling caps are optional Figure 9. Typical Application © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev.1.0.1 www.fairchildsemi.com 7 FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p Applications Information Functional Description The FMS6646 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 10. 1.0 -> 1.02V 800k 0.65V YIN Driver YOUT 0.65 -> 0.67V 0.3 -> 0.32V 0.0 -> 0.02V V IN Figure 11. Input Clamp Circuit I/O Configurations For DC-coupled DAC drive with DC-coupled outputs, use the configuration shown in Figure 12. Driven by: DC-Coupled DAC Outputs AC-Coupled and Clamped Y, CV, R, G, B 0V - 1.4V 2.28V 1.58V 0.88V 0.28V V OUT There is a 280mV offset from the DC input level to the DC output level. VOUT = 2 • VIN + 280mV. DVD or STB SoC DAC Output LCVF Clamp Inactive 75 Ω 0.85V 0.5V 0.15V V IN 1.98V 1.28V 0.58V V OUT Figure 12. DC-Coupled Inputs and Outputs 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 shown in Figure 13. 0V - 1.4V Driven by: AC-Coupled and Biased U, V, Pb, Pr, C DVD or STB SoC DAC Output 0.1μF LCVF Clamp Active 75Ω Figure 10. Typical Voltage Levels The FMS6646 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 out puts to directly drive the FMS6646 without an AC coupling capacitor. The worstcase sync tip compression due to the clamp does not exceed 7mV. The input level set by the clamp, combined with the internal DC offset, keeps the output within its acceptable range. When the input is ACcoupled, the diode clamp sets the sync tip (or lowest voltage) just below ground. For symmetric signals like C, U, V, Cb, Cr, 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 11. © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev.1.0.1 Figure 13. AC-Coupled Inputs, DC-Coupled Outputs W hen the FMS6646 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 14. 0V - 1.4V External video source must be AC coupled 0.1μF LCVF Clamp Active 75Ω 75Ω Figure 14. SCART Configuration with DC-Coupled Outputs www.fairchildsemi.com 8 FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p 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. If a pull-up resistance less than 7.5MΩ is desired, an external pulldown can be added such that the DC input level is set to 500mV. External video source must be AC coupled Power Dissipation The FMS6646 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 FMS6646’s power dissipation and internal temperature rise: TJ = TA + Pd • θJA where Pd = PCH1 + PCH2 + PCHx and 0.1μF 7.5MΩ LCVF Bias Input 75Ω PCHx = VS • ICH - (VO /RL) where VO = 2VIN + 0.280V ICH = (ICC / 6) + (VO/RL) VIN = RMS value of input signal ICC = 90mA , VS = 3.3V RL = channel load resistance Board layout can affect thermal characteristics. Refer to the Layout Considerations section for more information. 2 75Ω 500mV +/-350mV Figure 15. Biased SCART with DC-Coupled Outputs The same circuits can be used with AC-coupled outputs if desired, as shown in Figure 16. 0V - 1.4V DVD or STB SoC DAC Output LCVF Clamp Inactive 75 220µF Output Considerations The FMS6646 outputs will be DC offset from the input by 150mv therefore VOUT = 2*VIN DC+150mv. This offset is required to obtain optimal performance from the output driver and is held at the minimum value in order to decrease the standing DC current into the load. Since the FMS6646 has a 2x (6dB) gain, the output is typically connected via a 75Ω series back-matching resistor followed by the 75Ω video cable. Because of the inherent divide by two of this configuration, the blanking level at the load of the video signal is always less then 1V. When AC-coupling the output ensure that the coupling capacitor of choice will pass 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. In order to obtain the highest 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 FMS6646 output driver. Recommend distance from device pin to place series termination resistor should be no greater than 0.1 inches. Figure 16. DC-Coupled Inputs, AC-Coupled Outputs 0V - 1.4V DVD or STB SoC DAC Output 0.1μF LCVF Clamp Active 75Ω 220μF Figure 17. -Coupled Inputs, AC-Coupled Outputs External video source must be AC coupled. 7.5MW 0.1µF LCVF Clamp Active 75W 220µF 75W 500mV +/-350mV Figure 18. Biased SCART with AC-Coupled Outputs Note: 6. 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. © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev.1.0.1 9 Figure 19. Distance from Device Pin to Series Termination Resistor www.fairchildsemi.com FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p Layout Considerations General layout and supply bypassing play major roles in high-frequency performance and thermal characteristics. Fairchild offers a demonstration board, FMS6646DEMO, to guide layout and aid device testing and characteriza-tion. The FMS6646DEMO is a four-layer board with a full power and ground plane. Following this layout configura-tion pro vides the optimum performance and thermal char-acteristics. For best results, follow the steps below as a basis for high-frequency layout: Include 0.01μF and 0.1μF ceramic bypass capacitors. Place the 0.01μF capacitor within 0.75 inches of the power pin. Place the 0.1μF capacitor within 0.1 inches of the 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 by at least 0.5 inches. Minimize all trace lengths to reduce series inductances. © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev.1.0.1 www.fairchildsemi.com 10 FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p Physical Dimensions Figure 20. 20-Lead Thin Shrink Small Outline Package (TSSOP) 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 FMS6646 • Rev.1.0.1 www.fairchildsemi.com 11 FMS6646 — Low-Cost, Six-Channel Video Filter Driver for SD/HD 1080p © 2009 Fairchild Semiconductor Corporation FMS6646 • Rev.1.0.1 www.fairchildsemi.com 12