FMS6246_06

FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver March 2006 FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Three selectable sixth-order 8/15MHz (SD/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 5V only Robust (12kV HBM) output ESD protection Lead (Pb) free packages- TSSOP-20 Description 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. The FMS6246 offers a fixed gain of 6dB. A metal option is available that provides a fixed gain of 9dB, offering even more flexibility. 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). 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. Applications ■ ■ ■ ■ ■ Cable and satellite set-top boxes 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 FcSEL PS/HD Selectable 8/15MHz 6th order FMS6246 Rev. 1B 1 www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Pin Configuration SD IN1 SD IN2 SD IN3 N/C VCC FcSEL SD/PS IN1 SD/PS IN2 SD/PS IN3 N/C Pin Assignments 20 19 SD OUT1 SD OUT2 SD OUT3 GND GND N/C SD/PS OUT1 SD/PS OUT2 SD/PS OUT3 1 2 3 4 5 6 7 8 9 10 Pin # 1 2 3 4 5 Pin SD IN1 SD IN2 SD IN3 N/C VCC FcSEL SD/PS IN1 SD/PS IN2 SD/PS IN3 N/C N/C Type Input Input Input Input Input Input Input Input Input Input Input Description SD video input, channel 1 SD video input, channel 2 SD video input, channel 3 No Connect +5V 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 Connect No Connect FMS6246 20L TSSOP 18 17 16 15 14 13 12 11 6 7 8 9 N/C 10 11 12 13 14 SD/PS OUT3 Output Filtered SD or PS video output, channel 3 SD/PS OUT2 Output Filtered SD or PS video output, channel 2 SD/PS OUT1 Output Filtered SD or PS video output, channel 1 N/C GND GND SD OUT3 SD OUT2 SD OUT1 Input Input Input No Connect Must be tied to Ground Must be tied to Ground Factory Programming Options Part Name FMS6246 15 16 17 18 19 20 Part Number FMS6246MTC20 Gain Option 6dB 9dB Output Filtered SD video output, channel 3 Output Filtered SD video output, channel 2 Output Filtered SD video output, channel 1 FMS6246-9 FMS6246MTC209 Absolute Maximum Ratings Parameter DC Supply Voltage Analog and Digital I/O Output Current, Any One Channel (Do Not Exceed) Min -0.3 -0.3 Max 6 Vcc + 0.3 50 Unit V V mA Reliability Information Parameter Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10s) Thermal Resistance (ThetaJA), JEDEC Standard Multi-Layer Test Boards, Still Air 74 -65 Min Typ Max 150 150 300 Unit ˚C ˚C ˚C ˚C/W Recommended Operating Conditions Parameter Operating Temperature Range Supply Voltage Range Min 0 4.75 Typ 5.0 Max 70 5.25 Unit ˚C V www.fairchildsemi.com 2 FMS6246 Rev. 1B FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver DC Electrical Characteristics Tc = 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 ICC Vin Vil Vih Supply Parameter Current1 no load Video Input Voltage Range Digital Input Low1 Digital Input High1 Conditions Referenced to GND, if DC-coupled FcSEL FcSEL Min Typ 60 1.4 Max 80 Units mA Vpp 0 2.4 0.8 V V Vcc Standard Definition Electrical Characteristics Tc = 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 AVSD f1dBSD fcSD fSBSD DG DP THD XTALKSD SNR tpdSD -1dB Parameter Channel Gain1 Bandwidth1 reject)1 -3dB Bandwidth1 Attenuation(stopband Differential Gain Differential Phase Output Distortion Crosstalk (ch-to-ch) Signal-to-Noise Ratio2 Propagation Delay Conditions All SD Channels All SD Channels All SD Channels All SD Channels at f = 27MHz All SD Channels All SD Channels VOUT = 1.4Vpp, 3.58MHz at 1MHz NTC-7 weighting, 100kHz to 4.2MHz Delay from input to output, 4.5MHz Min 5.6 5.2 6.5 43 Typ 6.0 7.15 8.0 50 0.7 1.0 0.35 -54 72 90 Max 6.4 Units dB MHz MHz dB % ˚ % dB dB ns Progressive Scan Electrical Characteristics Tc = 25˚C, Vin = 1Vpp, Vcc = 5V, Rsource = 37.5Ω, FcSEL = 0, all inputs AC coupled with 0.1µF, all outputs AC coupled with 220µF into 150Ω loads, referenced to 400kHz; unless otherwise noted. Symbol AVPS f1dBSPS fcPS fSBPS THD XTALKPS SNR tpdPS Parameter Channel Gain1 -1dB Bandwidth1 -3dB Bandwidth1 Conditions All PS Channels All PS Channels All PS Channels Min 5.6 12 13 37 Typ 6.0 14 16 45 0.35 -53 66 47 Max 6.4 Units dB MHz MHz dB % dB dB ns Attenuation(stopband reject)1 All PS Channels at f = 54MHz Output Distortion (All PS channels) Crosstalk (ch-to-ch) Signal-to-Noise Ratio2 Propagation Delay VOUT = 1.4Vpp, 7MHz at 1MHz unweighted; 100kHz to 15MHz Delay from input to output Notes: 1. 100% tested at 25˚C 2. SNR = 20 * log (714mV/rms noise) FMS6246 Rev. 1B 3 www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Typical Performance Characteristics Tc = 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. Figure 1. SD Gain vs. Frequency 5 0 Figure 2. SD Flatness vs. Frequency 0.35 0.30 Normalized Gain (dB) -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 400kHz 5 10 15 20 25 30 Normalized Gain (dB) 0.25 0.20 0.15 0.10 0.05 0 -0.05 -0.10 -0.15 400kHz 1 2 3 4 5 6 Frequency (MHz) Frequency (MHz) Figure 3. PS Gain vs. Frequency 5 0 Figure 4. PS Flatness vs. Frequency 0.8 0.7 Normalized Gain (dB) Normalized Gain (dB) 10 20 30 40 50 60 -5 -10 -15 -20 -25 -30 -35 -40 -45 400kHz 0.6 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 400kHz 2 4 6 8 10 12 14 Frequency (MHz) Frequency (MHz) Figure 5. SD Group Delay vs. Frequency 70 Figure 6. PS Group Delay vs. Frequency 25 Normalized Group Delay (ns) 60 50 40 30 20 10 0 400kHz 1 Normalized Group Delay (ns) 2 3 4 5 6 7 8 9 10 20 15 10 5 0 400kHz 5 10 15 20 25 30 35 40 45 Frequency (MHz) Frequency (MHz) www.fairchildsemi.com 4 FMS6246 Rev. 1B FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Typical Performance Characteristics Tc = 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. Figure 7. SD Differential Gain 1.0 NTSC Figure 8. SD Differential Phase 1.0 NTSC 0.5 Differential Phase (Deg) Differential Gain (%) 0 0 Min = 0.05 Max = 0.59 ppmax = 0.63 -1.0 Min = 0.00 Max = 1.00 ppmax = 1.00 -1.0 1st 2nd 3rd 4th 5th 6th -2.0 1st 2nd 3rd 4th 5th 6th FMS6246 Rev. 1B 5 www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Applications Information 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 YOUT YIN Driver 800kΩ 1.0 -> 1.02V 0.65 -> 0.67V 0.3 -> 0.32V 0.0 -> 0.02V VIN Figure 10. Input Clamp Circuit I/O Configurations For DC-coupled DAC drive with DC-coupled outputs, use this configuration: Driven by: DC-Coupled DAC Outputs AC-Coupled and Clamped Y, CV, R, G, B 2.28V 1.58V 0.88V 0.28V VOUT 0V - 1.4V DVD or STB SoC DAC Output LCVF Clamp Inactive 75Ω There will be a 280mV offset from the DC input level to the DC output level. VOUT = 2 * VIN + 280mV 0.85V 0.5V 0.15V VIN Figure 11. DC-coupled Inputs and Outputs 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: 0V - 1.4V 1.98V 1.28V 0.58V VOUT Driven by: AC-Coupled and Biased U, V, Pb, Pr, C DVD or STB SoC DAC Output 0.1u LCVF Clamp Active 75Ω Figure 9. 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. 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 below: Figure 12. 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 0.1u External Video source must be AC-coupled. 75Ω LCVF Clamp Active 75Ω Figure 13. SCART Configuration with DC-coupled Outputs www.fairchildsemi.com 6 FMS6246 Rev. 1B 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. External Video source must 7.5MΩ be AC-coupled. 0.1u Power Dissipation 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 where Pd = PCH1 + PCH2 + PCHx and PCHx = Vs • ICH - (VO2/RL) where VO = 2Vin + 0.280V ICH = (ICC / 6) + (VO/RL) Vin = RMS value of input signal ICC = 60mA LCVF Bias Input 75Ω 75Ω 500mV +/-350mV Figure 14. Biased SCART with DC-coupled Outputs The same circuits can be used with AC-coupled outputs if desired. Vs = 5V RL = channel load resistance Board layout can also affect thermal characteristics. Refer to the Layout Considerations Section for more information. 0V - 1.4V DVD or STB SoC DAC Output LCVF Clamp Inactive 75Ω 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: • 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 15. DC-coupled Inputs, AC-coupled Outputs 0V - 1.4V DVD or STB SoC DAC Output 0.1u LCVF Clamp Active 75Ω 220μ Figure 16. AC-coupled Inputs, AC-coupled Outputs External video source must 7.5MΩ be AC-coupled. 0.1μ • For 2 layer boards, use a ground plane that extends beyond the device by at least 0.5” • Minimize all trace lengths to reduce series inductances LCVF Clamp Active 75Ω 220μ 75Ω 500mV +/-350mV Figure 17. 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 220µF in order to obtain satisfactory operation in some applications. FMS6246 Rev. 1B 7 www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Typical Application Diagram 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 0.1 uF 10.0 uF +5V Y1OUT 1 SD IN1 2 SD OUT1 20 75Ω 220uF 75Ω Video Cables 75Ω Y1 COUT 3 19 SD IN2 SD OUT2 75Ω 220uF 75Ω C CVOUT 18 SD IN3 SD OUT3 75Ω 220uF 75Ω CV 4 N/C GND 16, 17 Video SoC 5 Vcc FMS6246 20L TSSOP G/Y2OUT 7 SD/PS IN1 SD/PS OUT1 14 75Ω 220uF 75Ω Video Cables 75Ω Y2/G B/PbOUT 8 SD/PS IN2 SD/PS OUT2 13 75Ω 220uF 75Ω Pb/B R/PrOUT 9 SD/PS IN3 N/C SD/PS OUT3 12 FcSEL 75Ω 220uF 75Ω Pr/R 15 6 DAC Load Resistors AC-Coupling Caps are Optional Figure 18. Typical Application Diagram www.fairchildsemi.com 8 FMS6246 Rev. 1B FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Mechanical Dimensions 20-Lead Thin Shrink Outline Package (TSSOP) 6 N 5 e –B– 7 2X E/2 1.0 DIA 1.0 (b) 8 TSSOP-20 c1 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 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 MAX 1.10 0.15 0.95 0.75 – – 0.30 0.25 0.20 0.16 8° E1 E c b1 ddd C B A 2X N/2 TIPS 123 6 1.0 e /2 9 SECTION AA ccc 7 –A– D8 3 A2 A aaa C –C– b NX bbb M C B A A1 (02) (0.20) R1 –H– R GAGE PLANE 10 6.50 4.30 6.60 4.50 A A 0.25 (03) L (L1) 01 NOTES: 1 All dimensions are in millimeters (angle in degrees). 2 3 4 5 Dimensioning and tolerancing per ASME Y14.5–1994. Dimensions "D" does not include mold flash, protusions or gate burrs. Mold flash protusions or gate burrs shall not exceed 0.15 per side . Dimension "E1" does not include interlead flash or protusion. Interlead flash or protusion shall not exceed 0.25 per side. 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. Terminal numbers are shown for reference only. Datums – A – and – B – to be determined at datum plane – H – . Dimensions "D" and "E1" to be determined at datum plane – H – . 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. Cross sections A – A to be determined at 0.10 to 0.25mm from the leadtip. 6 7 8 9 10 8 Lead SYMBOL D E1 E e N MIN 2.90 4.30 NOM 3.0 4.40 6.4 BSC 0.65 BSC 8 MAX 3.10 4.50 SYMBOL D E1 E e N 14 Lead MIN 4.90 4.30 NOM 5.00 4.40 6.4 BSC 0.65 BSC 14 MAX 5.10 4.50 SYMBOL D E1 E e N 16 Lead MIN 4.90 4.30 NOM 5.00 4.40 6.4 BSC 0.65 BSC 16 MAX 5.10 4.50 20 Lead SYMBOL D E1 E e N MIN 6.50 4.30 NOM 6.50 4.40 6.4 BSC 0.65 BSC 20 MAX 6.60 4.50 SYMBOL D E1 E e N 24 Lead MIN 7.70 4.30 NOM 7.80 4.40 6.4 BSC 0.65 BSC 24 MAX 7.90 4.50 SYMBOL D E1 E e N 28 Lead MIN 9.50 4.30 NOM 9.70 4.40 6.4 BSC 0.65 BSC 28 MAX 9.80 4.50 FMS6246 Rev. 1B 9 www.fairchildsemi.com FMS6246 Six Channel, 6th Order SD/PS Video Filter Driver Ordering Information Model Part Number Gain Option 6dB 6dB Lead Free Yes Yes Package TSSOP-20 TSSOP-20 Container Rail Reel Pack Qty 94 2500 FMS6246 FMS6246MTC20 FMS6246 FMS6246MTC20X Temperature range for all parts: 0˚C to 70˚C. Contact Fairchild for additional gain options. Refer to the Factory Programming Options table for more information. www.fairchildsemi.com 10 FMS6246 Rev. 1B FMS6246 Six Channel, 6th Order SD/PS 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. ACEx™ FAST ActiveArray™ FASTr™ Bottomless™ FPS™ Build it Now™ FRFET™ CoolFET™ GlobalOptoisolator™ CROSSVOLT™ GTO™ DOME™ HiSeC™ EcoSPARK™ I2C™ E2CMOS™ i-Lo™ EnSigna™ ImpliedDisconnect™ FACT™ IntelliMAX™ FACT Quiet Series™ Across the board. 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PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. 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. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Preliminary First Production No Identification Needed Full Production 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. I18 www.fairchildsemi.com 11 ©2006 Fairchild Semiconductor Corporation