august 2011 ? 2008 fairchild semiconductor corporation www.fairchildsemi.com fms6363a ? rev. 2.0.2 fms6363a ? three-channel 7 th -order high-definition voltagep lus? video filter driver fms6363a three-channel 7 th -order high-definition voltageplus? video filter driver features ? three 7 th -order 32mhz (hd) filters ? drives single ac-or dc-coupled video loads (150 ? ) ? drives dual ac-or dc-coupled video loads (75 ? ) ? transparent input clamping ? single supply: 3.3v ? 5v ? ac-or dc-coupled inputs and outputs ? dc-coupled output eliminates ac-coupling capacitor ? robust 9kv esd protection ? 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) description the fms6363a voltageplus? vi deo filter is intended to replace passive lc filters and drivers with a cost- effective integrated device. the three 7 th -order filters provide improved frequency re sponse performance over the fms6363 and other 3-channel hd vfd devices. the fms6363a 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 (150 ? ) or dual (75 ? ) video loads. dc coupling the outputs removes the need for large out put coupling capacitors. the input dc levels are offs et approximately +280mv at the output (see applications section for details) . related resources 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 package packing method quantity FMS6363ACSX -40c to +85c 8-lead soic reel 2500
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fms6363a ? rev. 2.0.2 2 fms6363a ?three-channel 7 th -order high-definition voltagep lus? video filter driver block diagram in1 in2 in3 out1 out2 out3 6d b clamp 6d b bias 6d b bias figure 1. 7 th -order 30mhz filter pin configuration in1 out1 in2 in3 out 3 v cc out 2 gnd 1 2 3 4 8 7 6 5 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 v cc 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
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fms6363a ? rev. 2.0.2 3 fms6363a ?three-channel 7 th -order high-definition voltagep lus? video filter driver absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the devic e may not function or be operable above the recommended operating c onditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stre sses above the recommended operating conditi ons may affect device reliability. the absolute maximum ratings are stress ratings only. symbol parameter min. max. unit v s dc supply voltage -0.3 6.0 v v io analog and digital i/o -0.3 v cc +0.3 v v out maximum output current, do not exceed 50 ma esd information symbol parameter min unit esd human body model, jesd22-a114 9 kv charged device model, jesd22-c101 2 reliability information symbol parameter min. typ. max. unit t j junction temperature +150 c t stg storage temperature range -65 +150 c t l lead temperature (soldering, 10s) +300 c ? ja thermal resistance, jedec standard, multilayer test boards, still air 115 c/w recommended operating conditions the recommended operating conditions table defines the conditions for actual device oper ation. recommended operating conditions are specified to ens ure optimal performance to the datasheet specificat ions. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter min. typ. max. unit t a operating temperatur e range -40 +85 c v cc supply voltage range 3.14 3.30 5.25 v
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fms6363a ? rev. 2.0.2 4 fms6363a ?three-channel 7 th -order high-definition voltagep lus? video filter driver dc electrical characteristics unless otherwise noted t a =25c, v cc =3.3v, r s =37.5 ? ; all inputs are ac-coupled with 0.1f; all output ac-coupled with 220f into 150 ? load. symbol parameter conditions min. typ. max. units supply v s supply voltage range v s range 3.14 3.30 5.25 v i cc quiescent supply current (1) v s =+3.3v, no load 22 35 ma v s =+5v, no load 34 40 ma v in video input voltage range referenced to gnd if dc coupled 1.4 v pp psrr power supply rejection ratio dc (all channels) -60 db ac electrical characteristics unless otherwise noted, t a =25c, v cc =3.3v, r s =37.5 ? ; all inputs are ac-coupled with 0.1f; all outputs ac-coupled with 220f into 150 ? load. symbol parameter conditions min. typ. max. units av channel gain active video input range = 1v pp 5.8 6.0 6.2 db bw 0.5db 0.5db bandwidth r source =75 ? , r l =150 ? 28 mhz bw -1.0db -1.0 db bandwidth 26 30 mhz bw 3.0db -3.0 db bandwidth 30 34 mhz att 37.125m normalized stopband attenuation r source =75 ? , f=37.325mhz 6.5 db att 44.25m r source =75 ? , f=44.25mhz 14.5 att 74.25m r source =75 ? , f=74.25mhz 40 44 att 78m r source =75 ? , f=78mhz 46 thd1 output distortion (all channels) f=10 mhz; v out =1.4v pp -49 dbc thd2 f=15 mhz; v out =1.4v pp -48 thd3 f=22 mhz; v out =1.4v pp -45 x talk crosstalk (channel-to-channel) f=1.00 mhz; v out =1.4v pp -65 db snr peak signal to rms noise unweighted: 30mhz lowpass, 100khz to 30mhz 65 db t pd propagation delay delay from input to output; 100khz to 28mhz 12 ns
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fms6363a ? rev. 2.0.2 5 fms6363a ?three-channel 7 th -order high-definition voltagep lus? video filter driver typical application figure 3. typical application
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fms6363a ? rev. 2.0.2 6 fms6363a ?three-channel 7 th -order high-definition voltagep lus? video filter driver application information application circuits the fms6363a voltageplus? vi deo filter provides 6db gain from input to output. in addi tion, 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 4: t here is a 280mv offset from the dc input level to the dc output level. v out = 2 * v in + 280mv. 0 .0 -> 0.02v 0 .3 -> 0.32v 0 .65 -> 0.67v 1.0 -> 1.02v v in 0 .28v 0 .88v 1.58v 2 .28v driven by: dc-coupled dac outputs ac-coupled and clamped y, cv, r, g, b v out 0 .15v 0 .5v 0 .85v v in 0 .58v 1.28v 1.98v driven by: ac-coupled and biased u, v, pb, pr, c v out figure 4. typical voltage levels the fms6363a provides an internal diode clamp to support ac coupled input signals. if the input signal does not go below ground, t he input clamp does not operate. this allows dac out puts to directly drive the fms6363a without an ac c oupling capacitor. when the input is ac coupled, the di ode clamp sets the sync tip (or lowest voltage) just bel ow ground. the worst-case sync tip compression due to the clamp can not exceed 7mv. the input level set by the clamp, combined with the internal dc offset, k eeps the output within its acceptable range. for symmetric signals like chroma, u, v, pb, and pr; the average dc bias is fairly constant and the inputs can be ac-coupled. dac outputs can also drive these same signals without the ac coup ling capacitor. a conceptual illustration of the input clamp ci rcuit is shown in figure 5. y out video cables video cables 75 ? 75 ? 75 ? 75 ? driver y in load1 load2 (optional) 0.65 v figure 5. input clamp circuit i/o configurations for a dc-coupled dac drive with dc-coupled outputs, use this configuration: dvd or stb soc dac output 75w lcvf clamp inactive 0v - 1.4v figure 6. 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: dvd or stb soc dac output lcvf clamp active 0.1 0v - 1.4v 75 ? figure 7. ac-coupled inputs, dc-coupled outputs when the fms6363a is driven by an unknown external source or a scart switch with its own clamping circuitry, the inputs should be ac-coupled like this: 75 ? lcvf clamp active 0.1 external video source must be ac coupled 0v - 1.4v 75 ? figure 8. scart with dc-coupled outputs
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fms6363a ? rev. 2.0.2 7 fms6363a ?three-channel 7 th -order high-definition voltagep lus? video filter driver the same method can be used for biased signals. the pb and pr channels are baised to set the dc level to 500mv. figure 9. biased scart with dc-coupled outputs the same circuits can be used with ac-coupled outputs if desired. dvd or stb soc dac output 75 ? lcvf clamp active 0.1 0v - 1.4v 220 figure 10. dc-coupled inputs, ac-coupled outputs dvd or stb soc dac output lcvf clamp active 0.1 0v - 1.4v 75 ? 220 figure 11. ac-coupled inputs and outputs figure 12. biased scart with ac-coupled outputs note: 1. the video tilt or line time distortion is dominated by the ac-coupling capacitor. the value may need to be increased beyond 220 f to obtain satisfactory operation in some applications. power dissipation the fms6363a 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: t j = t a + p d ? ? ja (1) where: p d = p ch1 + p ch2 + p ch3 (2) p chx = v cc ? i ch - (v o 2 /r l ) (3) where: v o = 2v in + 0.280v (4) i ch = (i cc /3) + (v o /r l ) (5) v in = rms value of input signal i cc = 22ma v cc = 3.3v r l = channel load resistance board layout can also affect thermal characteristics. refer to the layout considerations section for details. the fms6363a is specifi ed to operate with output currents typically less than 50ma, more than sufficient for a dual (75 ? ) 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. lcvf clamp a ctive 0.1 external video source must be ac coupled 0v - 220 75 ? 75 ? lcvf clamp a ctive 0.1 external video source must be ac coupled 0v - 220 75 ? 75 ?
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fms6363a ? rev. 2.0.2 8 fms6363a ?three-channel 7 th -order high-definition voltagep lus? video filter driver layout considerations general layout and supply bypassing play a major role in high-frequency performance and thermal characteristics. fairchild offers a evaluation board to guide layout and aid device ev aluation. the evaluation board is a four-layer board with full power and ground planes. following this layout configuration provides optimum performance and the rmal characteristics for the device. for the best re sults, follow the steps and recommended routing rules listed below. recommended routing / layout rules ? do not run analog and digital signals in parallel. ? use separate analog and digital power planes to supply power. ? traces should run on top of the ground plane at all times. ? no trace should run ov er ground/power splits. ? avoid routing at 90 angles. ? minimize clock and video data trace length differences. ? include 10 f and 0.1 f ceramic power supply bypass capacitors. ? place the 0.1 f capacitor within 2.54mm (0.1in) of the device power pin. ? place the 10 f capacitor within 19.05mm (0.75in) 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 12.7mm (0.5in) on all sides. include a metal paddle under the device on the top layer. ? minimize all trace lengths to reduce series inductance. output considerations the fms6363a outputs are dc o ffset from the input by 150mv; therefore, v out = 2?v in dc+150mv. this offset is required to obtain optim al performance from the output driver and is held at the minimum value to decrease the standing dc current into the load. since the fms6363a has a 2x ( 6db) gain, the output is typically connected via a 75 ? -series back-matching resistor followed by the 75 ? video cable. due to the inherent divide-by-two of this configuration, the blanking level at the load of the vi deo signal is always less than 1v. when ac-coupling the output, ensure that the coupling capacitor of c hoice passes the lowest frequency content in the video signal and that line time distortion (video tilt) is k ept as low as possible. the selection of the coupling capacitor is a function of the subsequent circuit i nput impedance and the leakage current of the input being dr iven. to obtain the highest quality output video signal, the series termination resistor must be placed as cl ose to the device output pin as possible. this greatly reduces the parasitic capacitance and inductance effe ct on the output driver. distance from the device pin to the series termination resistor should be no greater than 2.54mm (0.1in). figure 13. termination resistor thermal considerations since the interior of most systems, such as set-top boxes, tvs, and dvd play ers, are at +70oc; consideration must be gi ven 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 ? understand the system power requirements and environmental conditions. ? maximize thermal performance of the pcb. ? consider using 70 m of copper for high-power designs. ? 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 te mperature is a function of board area, not copper thickness. ? use modeling techniques to provide a first-order approximation.
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fms6363a ? rev. 2.0.2 9 fms6363a ?three-channel 7 th -order high-definition voltagep lus? video filter driver physical dimensions 8 0 see detail a notes: unless otherwise specified a) this package conforms to jedec ms-012, variation aa, issue c, b) all dimensio ns are in millimeters. c) dimensions do not include mold flash or burrs. d) landpattern standard: soic127p600x175-8m. e) drawing filename: m08arev13 land pattern recommendation seating plane c gage plane x 45 detail a scale: 2:1 pin one indicator 4 8 1 b 5 a 5.60 0.65 1.75 1.27 6.20 5.80 3.81 4.00 3.80 5.00 4.80 (0.33) 1.27 0.51 0.33 0.25 0.10 1.75 max 0.25 0.19 0.36 0.50 0.25 r0.10 r0.10 0.90 0.40 (1.04) option a - bevel edge option b - no bevel edge 0.25 cba 0.10 c figure 14. 8-lead small outline integrated circuit (soic) package drawings are provided as a servic e to customers considering fairchild co mponents. drawings may change in any manner without notice. please note the revision and/or date on the drawi ng and contact a fairchild semiconductor representative to ver ify 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 pack aging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
? 2008 fairchild semiconductor corporation www.fairchildsemi.com fms6363a ? rev. 2.0.2 10 fms6363a ?three-channel 7 th -order high-definition voltagep lus? video filter driver
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