FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Features Description ■ Three selectable sixth-order 8/15MHz (SD/PS) filters The FMS6246 Low Cost Video Filter (LCVF) is intended to replace passive LC filters and drivers with a low-cost integrated device. Six 6th order Butterworth filters provide improved image quality compared to typical passive solutions. The combination of low power Standard Definition (SD) and Progressive Scan (PS) filters greatly simplify DVD video output circuitry. Three channels offer fixed SD filters while the other three are selectable between SD and PS 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 FMS6246 offers a fixed gain of 6dB. A metal option is available that provides a fixed gain of 9dB, offering even more flexibility. ■ 5V only ■ Robust (12kV HBM) output ESD protection ■ Lead (Pb) Free packages- TSSOP-20 The FMS6246 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). Applications ■ Cable and Satellite set top boxes 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 will be offset approximately +280mV at the output. ■ DVD players ■ HDTV ■ Personal Video Recorders (PVR) ■ Video On Demand (VOD) Block Diagram 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/PS IN1 Transparent Clamp 6dB SD/PS OUT1 SD/PS IN2 Transparent Clamp 6dB SD/PS OUT2 SD/PS IN3 Transparent Clamp 6dB SD/PS OUT3 Selectable 8/15 MHz 6th order FcSEL SD / PS ©2004 Fairchild Semiconductor Corporation FMS6246 Rev. 1A 1 www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver July 2005 SD IN1 1 20 SD OUT1 SD IN2 2 19 SD OUT2 SD IN3 3 18 SD OUT3 N/C 4 17 Gnd FAIRCHILD Vcc 5 6 SD/PS IN1 7 SD/PS IN2 SD/PS IN3 N/C 20L TSSOP Type 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 Connect 5 Vcc Input +5V supply 6 FcSEL Input Selects filter corner frequency for pins 7, 8, and 9. “0” = SD, “1” = HD 7 SD/PS IN1 Input Selectable SD or PS video input, channel 1 8 SD/PS IN2 Input Selectable SD or PS video input, channel 2 9 SD/PS IN3 Input Selectable SD or PS video input, channel 3 10 N/C Input No Connect 11 N/C Input 15 N/C 12 SD/PS OUT3 Output Filtered SD or PS video output, channel 3 14 SD/PS OUT1 13 SD/PS OUT2 Output Filtered SD or PS video output, channel 2 14 SD/PS OUT1 Output Filtered SD or PS video output, channel 1 SD/PS OUT2 9 12 SD/PS OUT3 10 11 N/C No Connect 15 N/C Input No Connect 16 Gnd Input Must be tied to Ground Must be tied to Ground 17 Gnd Input 18 SD OUT3 Output Filtered SD video output, channel 3 19 SD OUT2 Output Filtered SD video output, channel 2 20 SD OUT1 Output Filtered SD video output, channel 1 2 FMS6246 Rev. 1A Description Gnd 13 8 Pin 1 16 FMS6246 FcSEL Pin# www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Pin Assignments Pin Configuration Parameter Min. Max. Unit DC Supply Voltage -0.3 6 V Analog and Digital I/O -0.3 Vcc + 0.3 V 50 mA Output Current, Any One Channel (Do Not Exceed) Reliability Information Parameter Min. Typ. Junction Temperature Storage Temperature Range -65 Lead Temperature (Soldering, 10s) Max. 150 °C 150 °C 300 Thermal Resistance (ThetaJA), JEDEC Standard Multi-Layer Test Boards, Still Air Unit 74 °C °C/W Recommended Operating Conditions Parameter Min. Operating Temperature Range Typ. Max. Unit 70 °C 5.0 5.25 V 0 Supply Voltage Range 4.75 Factory Programming Options Part Name Part Number Gain Option FMS6246 FMS6246MTC20 6dB FMS6246-9 FMS6246MTC209 9dB 3 FMS6246 Rev. 1A www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Absolute Maximum Ratings Tc = 25°C, Vcc = 5V, Rsource = 37.5Ω, inputs AC coupled with 0.1uF, all outputs AC coupled with 220uF into 150Ω loads, referenced to 400kHz; unless otherwise noted. Symbol Parameter Current1 Conditions Min. Typ. Max 80 Units ICC Supply no load 60 Vin Video Input Voltage Range Referenced to GND, if DC-coupled 1.4 mA Vil Digital Input Low1 FcSEL 0 0.8 V Vih Digital Input High1 FcSEL 2.4 Vcc V Vpp Standard Definition Electrical Characteristics Tc = 25°C, Vin = 1Vpp, Vcc = 5V, Rsource = 37.5Ω, all inputs AC coupled with 0.1uF, all outputs AC coupled with 220uF into 150Ω loads, referenced to 400kHz; unless otherwise noted. Symbol AVSD Parameter Channel Conditions Gain1 Min. Typ. Max Units 6.4 dB All SD Channels 5.6 6.0 f1dBSD -1dB Bandwidth 1 All SD Channels 5.2 7.15 MHz fcSD -3dB Bandwidth1 All SD Channels 6.5 8.0 MHz fSBSD Attenuation(stopband reject)1 All SD Channels at f = 27MHz 50 dB 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 % XTALKSD Crosstalk (ch-to-ch) at 1MHz -54 dB SNR Signal-to-Noise Ratio2 NTC-7 weighting, 100kHz to 4.2MHz 72 dB tpdSD Propagation Delay Delay from input to output, 4.5MHz 90 ns 43 Progressive Scan Electrical Characteristics Tc = 25°C, Vin = 1Vpp, Vcc = 5V, Rsource = 37.5Ω, all inputs AC coupled with 0.1uF, all outputs AC coupled with 220uF into 150Ω loads, referenced to 400kHz; unless otherwise noted. Symbol Min. Typ. Max Units All PS Channels 5.6 6.0 6.4 dB f1dBSPS -1dB Bandwidth 1 All PS Channels 12 14 MHz fcPS -3dB Bandwidth1 All PS Channels 13 16 MHz All PS Channels at f = 54MHz 37 AVPS Parameter Conditions Channel Gain1 1 fSBPS Attenuation(stopband reject) 45 dB THD Output Distortion (All PS channels) VOUT = 1.4Vpp, 7MHz 0.35 % XTALKPS Crosstalk (ch-to-ch) at 1MHz -53 dB unweighted; 100kHz to 15MHz 66 dB Delay from input to output 47 ns SNR Signal-to-Noise Ratio tpdPS Propagation Delay 2 Notes: 1. 100% tested at 25°C 2. SNR = 20 * log (714mV / rms noise) 4 FMS6246 Rev. 1A www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver DC Electrical Characteristics coupling capacitor. A conceptual illustration of the input clamp circuit is shown below: Functional Description The FMS6246 Low Cost Video Filter (LCVF) provides 6dB gain (9dB optional, contact factory for further information) from input to output. In addition, the input will be 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 the diagram below. 0.65V YIN Driver YOUT 800kΩ 1.0 -> 1.02V Figure 2. Input Clamp Circuit 0.65 -> 0.67V I/O Configurations 0.3 -> 0.32V 0.0 -> 0.02V Vin For DC-coupled DAC drive with DC-coupled outputs, use this configuration: Driven by: DC-Coupled DAC Outputs or AC-Coupled and Clamped Y, R, G, B, CV 2.28V 1.58V 0.88V 0.28V 0V - 1.4V DVD or STB SoC DAC Output Vout There will be a 280mV offset from the DC input level to the DC output level. Vout = 2 * Vin + 280mV LCVF Clamp Inactive 75 0.85V Figure 3. DC-coupled Inputs and Outputs 0.5V 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 follows: 0.15V Vin 0V - 1.4V 1.98V Driven by: DC-Coupled DAC Outputs AC-Coupled and Biased U, V, Pb, Pr, C 1.28V 0.58V DVD or STB SoC DAC Output Vout 0.1u LCVF Clamp Active 75 Figure 1. Typical Voltage Levels The FMS6246 provides an internal diode clamp to support ACcoupled input signals. If the input signal does not go below ground, the input clamp will not operate. This allows DAC outputs to directly drive the FMS6246 without an AC coupling capacitor. The worst-case sync tip compression due to the clamp will not exceed 7mV. The input level set by the clamp combined with the internal DC offset will keep the output within its acceptable range. When the input is AC-coupled, the diode clamp will set the sync tip (or lowest voltage) just below ground. Figure 4. AC-coupled Inputs, DC-coupled Outputs When the FMS6246 is driven by an unknown external source or a SCART switch with its own clamping circuitry the inputs should be AC-coupled as follows: 0V - 1.4V 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 0.1u External Video source must be AC-coupled. LCVF Clamp Active 75 75 Figure 5. SCART Configuration with DC-coupled Outputs 5 FMS6246 Rev. 1A www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Applications Information Power Dissipation External Video source must be AC-coupled. where Pd = PCH1 + PCH2 + PCHx The FMS6246 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 FMS6246’s power dissipation and internal temperature rise. Tj = TA + Pd • ΘJA 0.1u 7.5M and PCHx = Vs • ICH - (VO2/RL) 75 LCVF Bias Input where VO = 2Vin + 0.280V 500mV +/-350mV 75 ICH = (ICC / 6) + (VO/RL) Vin = RMS value of input signal ICC = 60mA Figure 6. Biased SCART with DC-coupled Outputs Vs = 5V The same circuits can be used with AC-coupled outputs if desired. 0V - 1.4V DVD or STB SoC DAC Output LCVF Clamp Inactive 75 RL = channel load resistance Board layout can also affect thermal characteristics. Refer to the Layout Considerations Section for more information. 220u Layout Considerations General layout and supply bypassing play major roles in high frequency performance and thermal characteristics. Fairchild offers a demonstration board, FMS6246DEMO, to use as a guide for layout and to aid in device testing and characterization. The FMS6246DEMO is a 4-layer board with a full power and ground plane. Following this layout configuration will provide the optimum performance and thermal characteristics. For optimum results, follow the steps below as a basis for high frequency layout: Figure 7. DC-coupled inputs, AC-coupled Outputs 0V - 1.4V 0.1u DVD or STB SoC DAC Output LCVF Clamp Active 75 • Include 10µF and 0.1µF ceramic bypass capacitors 220u • 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 • For 2 layer boards, use a ground plane that extends beyond the device by at least 0.5” Figure 8. AC-coupled inputs and outputs • Minimize all trace lengths to reduce series inductances External video source must be AC-coupled. 0.1u 7.5M LCVF Clamp Active 75 220u 500mV +/-350mV 75 Figure 9. Biased SCART with AC-Coupled Outputs NOTE: The video tilt or line time distortion will be dominated by the AC-coupling capacitor. The value may need to be increased beyond 220uF in order to obtain satisfactory operation in some applications. 6 FMS6246 Rev. 1A www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS 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 DCcoupled outputs may be used with AC-coupled outputs offering slightly lower power dissipation. DVD Player or STB +5V 0.1 uF 10 uF 1 Y1OUT 75Ω 220uF 75Ω 220uF 75Ω 220uF 75Ω Video Cables Y1 20 SD OUT1 SD IN1 75Ω 2 C 19 COUT SD IN2 SD OUT2 75Ω CV 18 3 CVOUT SD IN3 SD OUT3 75Ω 5 Video SoC Vcc 16,17 FAIRCHILD FMS6246 20L TSSOP GND 75Ω 220uF 75Ω Video Cables Y2/G 14 7 G/Y2OUT SD/PS IN1 SD/PS OUT1 75Ω 75Ω 220uF 75Ω 220uF Pb/B 13 8 B/PbOUT SD/PS IN2 SD/PS OUT2 75Ω Pr/R 12 9 R/PrOUT SD/PS IN3 SD/PS OUT3 FcSEL 6 DAC Load Resistors 75Ω AC-Coupling Caps are Optional. Figure 10. Typical application diagram 7 FMS6246 Rev. 1A www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Typical Application Diagram FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Mechanical Dimensions 20-Lead Thin Shrink Outline Package (TSSOP) 6 e –B– 7 N 5 (b) 2X E/2 TSSOP-20 8 1.0 DIA E1 E c SYMBOL A A1 A2 L R R1 b b1 c c1 01 L1 aaa bbb ccc ddd e 02 03 D E1 E e N c1 1.0 b1 ddd C B A 1 2 3 6 2X N/2 TIPS SECTION AA e /2 9 1.0 ccc A2 D 8 3 7 –A– aaa C A –C– b NX A1 (02) (0.20) bbb M C B A R1 –H– R GAGE PLANE 10 A 0.25 (03) L A 01 (L1) MIN – 0.05 0.85 0.50 0.09 0.09 0.19 0.19 0.09 0.09 0° NOM – – 0.90 0.60 – – – 0.22 – – – 1.0 REF 0.10 0.10 0.05 0.20 0.65 BSC 12° REF 12° REF 6.50 4.40 6.4 BSC 0.65 BSC 20 6.50 4.30 MAX 1.10 0.15 0.95 0.75 – – 0.30 0.25 0.20 0.16 8° 6.60 4.50 NOTES: 1 All dimensions are in millimeters (angle in degrees). 2 Dimensioning and tolerancing per ASME Y14.5–1994. 3 Dimensions "D" does not include mold flash, protusions or gate burrs. Mold flash protusions or gate burrs shall not exceed 0.15 per side . 4 Dimension "E1" does not include interlead flash or protusion. Interlead flash or protusion shall not exceed 0.25 per side. 5 Dimension "b" does not include dambar protusion. Allowable dambar protusion shall be 0.08mm total in excess of the "b" dimension at maximum material condition. Dambar connot be located on the lower radius of the foot. Minimum space between protusion and adjacent lead is 0.07mm for 0.5mm pitch packages. 6 Terminal numbers are shown for reference only. 7 Datums – A – and – B – to be determined at datum plane – H – . 8 Dimensions "D" and "E1" to be determined at datum plane – H – . 9 This dimensions applies only to variations with an even number of leads per side. For variation with an odd number of leads per side, the "center" lead must be coincident with the package centerline, Datum A. 10 Cross sections A – A to be determined at 0.10 to 0.25mm from the leadtip. 8 Lead SYMBOL D E1 E e N MIN 2.90 4.30 SYMBOL D E1 E e N MIN 6.50 4.30 NOM 3.0 4.40 6.4 BSC 0.65 BSC 8 14 Lead MAX 3.10 4.50 SYMBOL D E1 E e N MIN 4.90 4.30 MAX 6.60 4.50 SYMBOL D E1 E e N MIN 7.70 4.30 20 Lead NOM 6.50 4.40 6.4 BSC 0.65 BSC 20 NOM 5.00 4.40 6.4 BSC 0.65 BSC 14 SYMBOL D E1 E e N MIN 4.90 4.30 MAX 7.90 4.50 SYMBOL D E1 E e N MIN 9.50 4.30 24 Lead NOM 7.80 4.40 6.4 BSC 0.65 BSC 24 8 FMS6246 Rev. 1A 16 Lead MAX 5.10 4.50 NOM 5.00 4.40 6.4 BSC 0.65 BSC 16 MAX 5.10 4.50 28 Lead NOM 9.70 4.40 6.4 BSC 0.65 BSC 28 MAX 9.80 4.50 www.fairchildsemi.com Gain Option Lead Free Package Container Pack Qty FMS6246 FMS6246MTC20 6dB Yes TSSOP-20 Rail 94 FMS6246 FMS6246MTC20X 6dB Yes TSSOP-20 Reel 2500 Model Part Number Temperature range for all parts: 0°C to 70°C. Contact Fairchild for additional gain options. Refer to Factory Programming Options Table for more information. 9 FMS6246 Rev. 1A www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Ordering Information 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. ACEx™ FACT Quiet Series™ ActiveArray™ FAST® Bottomless™ FASTr™ CoolFET™ FPS™ CROSSVOLT™ FRFET™ DOME™ GlobalOptoisolator™ EcoSPARK™ GTO™ E2CMOSTM HiSeC™ EnSignaTM I2C™ FACT™ ImpliedDisconnect™ Across the board. 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PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition 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, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order 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 in order 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. Rev. I7 10 FMS6246 Rev. 1A www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver TRADEMARKS