FMS6346 Six Channel, 6th-Order SD/HD Video Filter Driver Features Description ■ Three selectable sixth-order 8/32MHz (SD/HD) filters The FMS6346 Low Cost Video Filter (LCVF) is intended to replace passive LC filters and drivers with a low-cost integrated device. Six sixth-order Butterworth filters provide improved image quality compared to typical passive solutions. The combination of low-power Standard-Definition (SD) and High-Definition (HD) filters greatly simplify DVD video output circuitry. Three channels offer fixed SD filters, while the other three are selectable between SD and HD filters. ■ Three fixed sixth-order 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 The FMS6346 offers a fixed gain of 6dB. The FMS6346 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). ■ 5V only ■ Robust (12kV HBM) output ESD protection ■ Lead-free package - TSSOP-20 Applications 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. ■ Cable and satellite set-top boxes ■ DVD players ■ HDTV ■ Personal Video Recorders (PVR) ■ Video On Demand (VOD) Ordering Information Part Number Gain Option Temperature Package Container Quantity FMS6346MTC20 6dB 0°C to 70°C TSSOP-20 Rail 94 FMS6346MTC20X 6dB 0°C to 70°C TSSOP-20 Reel 2500 All packages are lead free per JEDEC: J-STD-020B standard. SD IN1 Transparent Clamp 6dB SD OUT1 SD IN2 Transparent Clamp 6dB SD OUT2 SD IN3 Transparent Clamp 6dB SD OUT3 8MHz, 6th order SD/HD IN1 Transparent Clamp 6dB SD/HD OUT1 SD/HD IN2 Transparent Clamp 6dB SD/HD OUT2 SD/HD IN3 Transparent Clamp 6dB SD/HD OUT3 SD/HD Selectable 8/32MHz 6th order Figure 1. Block Diagram © 2006 Fairchild Semiconductor FMS6346 Rev. 1.0.4 www.fairchildsemi.com FMS6346 — Six Channel, 6th-Order SD/HD Video FIlter Driver February 2008 FMS6346 — Six Channel, 6th-Order SD/HD Video FIlter Driver Pin Configuration SD IN1 1 20 SD OUT1 SD IN2 2 19 SD OUT2 SD IN3 3 18 SD OUT3 FMS6346 20L TSSOP N/C 4 17 GND VCC 5 16 GND FcSEL 6 15 N/C SD/HD IN1 7 14 SD/HD OUT1 SD/HD IN2 8 13 SD/HD OUT2 SD/HD IN3 9 12 SD/HD OUT3 N/C 10 11 N/C Figure 2. Pin Configuration Pin Assignments Pin# Pin Type Description 1 SD IN1 Input SD video input, channel 1 2 SD IN2 Input SD video input, channel 2 3 SD IN3 Input SD video input, channel 3 4 N/C Input No Connection 5 VCC Input +5V supply 6 FcSEL 7 SD/HD IN1 Input Selectable SD or PS video input, channel 1 8 SD/HD IN2 Input Selectable SD or PS video input, channel 2 9 SD/HD IN3 Input Selectable SD or PS video input, channel 3 10 N/C Input No Connection Input No Connection Input Selects filter corner frequency for pins 7, 8, and 9: “0” = SD, “1” = PS 11 N/C 12 SD/HD Out- Filtered SD or PS video output, channel 3 13 SD/HD Out- Filtered SD or PS video output, channel 2 14 SD/HD Out- Filtered SD or PS video output, channel 1 15 N/C Input No Connection 16 GND Input Must be tied to ground 17 GND Input Must be tied to ground 18 SD OUT3 Out- Filtered SD video output, channel 3 19 SD OUT2 Out- Filtered SD video output, channel 2 20 SD OUT1 Out- Filtered SD video output, channel 1 © 2006 Fairchild Semiconductor FMS6346 Rev. 1.0.4 www.fairchildsemi.com 2 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 VCC DC Supply Voltage -0.3 6 V VIO Analog and Digital I/O -0.3 VCC + 0.3 V IOUT Output Current, Any One Channel (Do Not Exceed) 50 mA Reliability Information Symbol TJ TSTG Parameter Min. Typ. Junction Temperature Storage Temperature Range -65 TL Lead Temperature (Soldering, 10 Seconds) θJA Thermal Resistance, JEDEC Standard Multi-Layer Test Boards, Still Air Max. Unit 150 °C 150 °C 300 °C 74 °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 TA VCC Parameter Min. Operating Temperature Range Max. Unit 70 °C 5.00 5.25 V 0 Supply Voltage Range © 2006 Fairchild Semiconductor FMS6346 Rev. 1.0.4 Typ. 4.75 www.fairchildsemi.com 3 FMS6346 — Six Channel, 6th-Order SD/HD Video FIlter Driver Absolute Maximum Ratings TA = 25°C, Vcc = 5V, Rsource = 37.5Ω, inputs AC coupled with 0.1μF, all outputs AC coupled with 220μF into 150Ω loads, referenced to 400kHz; unless otherwise noted. Symbol Parameter Conditions Min. Typ. Max. Units No Load 60 80 mA 1.4 ICC Supply Current VIN Video Input Voltage Range Referenced to GND, if DC-coupled VIL Digital Input Low(1) fcSEL 0 0.8 V VIH Digital Input High(1) fcSEL 2.4 VCC V (1) Vpp Standard-Definition Electrical Characteristics TA= 25°C, Vin = 1Vpp, Vcc = 5V, Rsource = 37.5Ω, all inputs AC coupled with 0.1μF, all outputs AC coupled with 220μF into 150Ω loads, referenced to 400kHz; unless otherwise noted. Symbol Parameter AVSD Channel Gain(1) f1dBSD -1dB Bandwidth(1) Min. Typ. Max. Units All SD Channels Conditions 5.8 6.0 6.2 dB All SD Channels 5.50 7.15 MHz All SD Channels 6.5 8.0 MHz All SD Channels at f = 27MHz 43 50 dB fcSD -3dB Bandwidth fSBSD Attenuation (Stopband Reject) DG Differential Gain All SD Channels 0.7 % DP Differential Phase All SD Channels 1.0 ° THD Output Distortion VOUT = 1.4Vpp, 3.58MHz 0.35 % at 1MHz -54 dB NTC-7 weighting, 100kHz to 4.2MHz 72 dB Delay from input to output, 4.5MHz 90 ns XTALKSD (1) (1) Crosstalk (ch-to-ch) SNR Signal-to-Noise Ratio tpdSD Propagation Delay (2) High-Definition Electrical Characteristics TA = 25°C, VIN = 1Vpp, Vcc = 5V, Rsource = 37.5Ω, FcSEL = 1, all inputs AC coupled with 0.1μF, all outputs AC coupled with 220μF into 150Ω loads, referenced to 400kHz; unless otherwise noted. Symbol Parameter AVHD Channel Gain f1dBSHD -1dB Bandwidth Conditions Min. Typ. Max. Units All HD Channels 5.8 6.0 (1) All HD Channels 28 31 MHz fcHD -3dB Bandwidth(1) All HD Channels 30 34 MHz fSBHD Attenuation (Stopband Reject)(1) All HD Channels at f = 74.25MHz 30 41 dB THD Output Distortion (All HD Channels) VOUT = 1.4Vpp, 22MHz 0.9 % Crosstalk (ch-to-ch) at 1MHz -54 dB Unweighted; 100kHz to 30MHz 60 dB Delay from input to output 25 ns XTALKHD (1) SNR Signal-to-Noise Ratio tpdHD Propagation Delay (2) 6.2 dB Notes: 1. 100% tested at 25°C. 2. SNR = 20 * log (714mV/rms noise). © 2006 Fairchild Semiconductor FMS6346 Rev. 1.0.4 www.fairchildsemi.com 4 FMS6346 — Six Channel, 6th-Order SD/HD Video FIlter Driver DC Electrical Characteristics TA = 25°C, VIN = 1Vpp, VCC = 5V, Rsource = 37.5Ω, inputs AC coupled with 0.1μF, all outputs AC coupled with 220μF into 150Ω loads; unless otherwise noted. 0.35 0.30 Normalized Gain (dB) Normalized Gain (dB) 5 0 -5 -10 -15 -20 -25 -30 -35 -40 0.25 0.20 0.15 0.10 0.05 0 -0.05 -45 -0.10 -50 400kHz -0.15 5 10 15 20 25 30 400kHz 1 2 Frequency (MHz) 5 Normalized Gain (dB) Normalized Gain (dB) -5 -10 -15 -20 -25 -30 -35 -40 400kHz 10 20 30 40 50 60 70 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -0.1 400kHz 80 5 10 Frequency (MHz) 15 20 25 30 Frequency (MHz) Figure 5. HD Gain vs. Frequency Figure 6. HD Flatness vs. Frequency 25 Normalized Group Delay (ns) 70 Normalized Group Delay (ns) 6 5 1.0 0.9 0 60 50 40 30 20 10 0 400kHz 1 20 15 10 5 0 2 3 4 5 6 7 8 9 10 400kHz 5 10 Frequency (MHz) 15 20 25 30 35 40 45 Frequency (MHz) Figure 8. HD Group Delay vs. Frequency Figure 7. SD Group Delay vs. Frequency 1.0 NTSC Differential Phase (Deg) Differential Gain (%) 4 Figure 4. SD Flatness vs. Frequency Figure 3. SD Gain vs. Frequency 1.0 3 Frequency (MHz) 0.5 0 Min = 0.05 Max = 0.59 ppmax = 0.63 NTSC 0 -1.0 Min = 0.00 Max = 1.00 ppmax = 1.00 -2.0 -1.0 1st 2nd 3rd 4th 5th 6th 1st 3rd 4th 5th 6th Figure 10. HD Differential Phase Figure 9. SD Differential Gain © 2006 Fairchild Semiconductor FMS6346 Rev. 1.0.4 2nd www.fairchildsemi.com 5 FMS6346 — Six Channel, 6th-Order SD/HD Video FIlter Driver Typical Performance Characteristics Functional Description 0.65V The FMS6346 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. YIN Driver YOUT 800kΩ Figure 12. Input Clamp Circuit 1.0 -> 1.02V 0.65 -> 0.67V I/O Configurations 0.3 -> 0.32V 0.0 -> 0.02V VIN 2.28V 1.58V 0.88V 0.28V VOUT For DC-coupled DAC drive with DC-coupled outputs, use the configuration shown in Figure 13. 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 75Ω There is a 280mV offset from the DC input level to the DC output level. VOUT = 2 * VIN + 280mV. Figure 13. DC-Coupled Inputs and Outputs 0.85V 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 14. 0.5V 0.15V VIN 0V - 1.4V 1.98V Driven by: AC-Coupled and Biased U, V, Pb, Pr, C 1.28V 0.58V DVD or STB SoC DAC Output VOUT 0.1μF LCVF Clamp Active 75Ω Figure 11. Typical Voltage Levels The FMS6346 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 FMS6346 without an AC coupling capacitor. The worst-case 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 AC-coupled, the diode clamp sets the sync tip (or lowest voltage) just below ground. Figure 14. AC-Coupled Inputs, DC-Coupled Outputs When the 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 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 12. 0.1μF LCVF Clamp Active 75Ω 75Ω Figure 15. SCART Configuration with DC-Coupled Outputs © 2006 Fairchild Semiconductor FMS6346 Rev. 1.0.4 www.fairchildsemi.com 6 FMS6346 — Six Channel, 6th-Order SD/HD Video FIlter Driver Applications Information External video source must be AC coupled 75Ω Power Dissipation The FMS6346 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 FMS6346’s power dissipation and internal temperature rise: TJ = TA + Pd • θJA 0.1μF where Pd = PCH1 + PCH2 + PCHx 7.5MΩ LCVF Bias Input 75Ω and PCHx = Vs • ICH - (VO2/RL) where VO = 2Vin + 0.280V 500mV +/-350mV ICH = (ICC / 6) + (VO/RL) VIN = RMS value of input signal ICC = 60mA Figure 16. Biased SCART with DC-Coupled Outputs Vs = 5V The same circuits can be used with AC-coupled outputs if desired, as shown in Figure 17. 0V - 1.4V DVD or STB SoC DAC Output LCVF Clamp Inactive RL = channel load resistance Board layout can affect thermal characteristics. Refer to the Layout Considerations section for more information. 220µF 75Ω Layout Considerations General layout and supply bypassing play major roles in high-frequency performance and thermal characteristics. Fairchild offers a demonstration board, FMS6346DEMO, to guide layout and aid device testing and characterization. The FMS6346DEMO is a four-layer board with a full power and ground plane. Following this layout configuration provides the optimum performance and thermal characteristics. For best results, follow the steps below as a basis for high-frequency layout: Figure 17 DC-Coupled Inputs, AC-Coupled Outputs 0V - 1.4V DVD or STB SoC DAC Output 0.1μF LCVF Clamp Active 75Ω 220μF • Include 10μF and 0.1μF ceramic bypass capacitors • Place the 10μF 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 Figure 18. AC-Coupled Inputs, AC-Coupled Outputs External video 7.5MΩ source must be AC coupled. 0.1μF 75Ω • For two-layer boards, use a ground plane that extends beyond the device by at least 0.5 inches LCVF Clamp Active 75Ω • Minimize all trace lengths to reduce series inductances 220μF 500mV +/-350mV Figure 19. Biased SCART with AC-Coupled Outputs 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. © 2006 Fairchild Semiconductor FMS6346 Rev. 1.0.4 www.fairchildsemi.com 7 FMS6346 — Six Channel, 6th-Order SD/HD 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. If a pull-up resistance less than 7.5MΩ is desired, an external pull-down can be added such that the DC input level is set to 500mV. The following circuit may be used for direct DC-coupled drive by DACs with an output voltage range of 0V to 1.4V. AC-coupled or DC-coupled outputs may be used with AC-coupled outputs offering slightly lower power dissipation. DVD Player or STB +5V 0.1 µF 10.0 µF 75Ω Y1OUT 1 2 Y1 75Ω 220µF C 19 SD IN2 SD OUT2 75Ω 75Ω 3 220µF CV 18 SD OUT3 SD IN3 75Ω 4 16, 17 N/C Video SoC 75Ω Video Cables SD OUT1 75Ω COUT CVOUT 220µF 20 SD IN1 GND FMS6346 20L TSSOP 5 Vcc 75Ω G/Y2OUT 7 220µF 75Ω Video Cables Y2/G 14 SD/HD IN1 SD/HD OUT1 75Ω 75Ω B/PbOUT 8 220µF Pb/B 13 SD/HD IN2 SD/HD OUT2 75Ω 75Ω R/PrOUT 9 SD/HD IN3 N/C 220µF Pr/R SD/HD OUT3 12 FcSEL 15 75Ω 6 AC-coupling caps are optional DAC load resistors Figure 20. Typical Application Diagram © 2006 Fairchild Semiconductor FMS6346 Rev. 1.0.4 www.fairchildsemi.com 8 FMS6346 — Six Channel, 6th-Order SD/HD Video FIlter Driver Typical Application Diagram FMS6346 — Six Channel, 6th-Order SD/HD Video FIlter Driver Physical Dimensions Figure 21. 20-Lead, Thin-Shrink 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/ © 2006 Fairchild Semiconductor FMS6346 Rev. 1.0.4 www.fairchildsemi.com 9 FMS6346 — Six Channel, 6th-Order SD/HD Video FIlter Driver © 2006 Fairchild Semiconductor FMS6346 Rev. 1.0.4 www.fairchildsemi.com 10