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product description SGM9115 is a video buffer which integrates triple 6db gain rail-to-rail output drivers and triple 3rd-order output reconstruction filters with a -3db bandwidth of 9mhz and 44v/s slew rate. operating from single power supply ranging from 3.3v to 5.5v, the SGM9115 provides improved image quality compared with passive lc filters and discrete drivers solution. SGM9115 can be dc-coupled or ac-coupled with input video signal, such as the output stage of dac to eliminate out-of-band noise. internal diode clamps and bias circuitry may be used if ac-coupled inputs are required. SGM9115 also integrates an internal level shift circuit which avoids sync-pulse being clipped and allows dc-coupled output. the drivers in SGM9115 can drive dc- or ac-coupled single (150 ? ) or dual (75 ? ) loads. the SGM9115 is available in green soic-8 package and esd (hbm) reaches 8kv. SGM9115 triple, 9mhz, 3rd-order sdtv video filter driver features ? triple 3rd-order 9mhz (sd) filters ? transparent input clamping ? 6db output driver gain and drive dual video loads ? rail-to-rail output ? input voltage range includes ground ? ac- or dc-coupled inputs ? ac- or dc-coupled outputs ? operates from 3.3v to 5.5v single power supply ? available in green soic-8 package applications video amplifiers cable and satellite set-top boxes communication devices video on demand portable and handheld products personal video recorders dvd players sdtvs block diagram 9mhz, 3rd-order transparent clamp 6db in1 out1 9mhz, 3rd-order transparent clamp 6db in3 out3 9mhz, 3rd-order transparent clamp 6db in2 out2 rev. b. 3 sg micro corp www.sg-micro.com
triple, 9mhz, 3rd-order sdtv video filter driver 2 SGM9115 sg micro corp www.sg-micro.com package/ordering information order number package description temperature range package option marking information SGM9115xs/tr soic-8 -40 to +125 tape and reel, 2500 SGM9115xs pin configuration (top view) out2 out1 gnd in1 1 2 3 4 5 6 7 8 in2 in3 +v s out3 SGM9115 soic-8 absolute maximum ratings supply voltage, gnd to +v s .............................................7.5v input voltage.......... .............. ........gnd - 0.3 v to (+v s ) + 0.3v storage temperature range .........................-65 to +150 junction temperature ................................................... 160 operating temperature rang e...................... -40 to +125 power dissipation, p d @ t a = 25 soic-8 ...........................................................................0.8w package thermal resistance soic-8, ja .................. ............... .................... .......... 128 /w lead temperature range (soldering 10 sec) .......................................................................................260 esd susceptibility hbm...............................................................................8000v mm...................................................................................400v note: stresses beyond those list ed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the sp ecifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. pin description pin name function 1 in1 video input. channel 1. 2 in2 video input. channel 2. 3 in3 video input. channel 3. 4 +v s power supply. 5 gnd ground. 6 out3 filtered output. channel 3. 7 out2 filtered output. channel 2. 8 out1 filtered output. channel 1. caution this integrated circuit can be damaged by esd if you don?t pay attention to esd protecti on. sgmicro recommends that all integrated circuits be handled with appropriate precautions. failure to observe proper handling and installation procedures can cause damage. esd damage can range from subtle performance degradation to complete device failure. precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. sgmicro reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. pl ease contact sgmicro sales office to get the latest datasheet.
triple, 9mhz, 3rd-order sdtv video filter driver 3 sg micro corp www.sg-micro.com SGM9115 electrical characteristics: v s = +5.0v (at r l = 150 ? connected to gnd, v in = 1v pp and c in = 0.1 f, all outputs ac-coupled with 220 f, unless otherwise noted.) SGM9115 typ min/max over temperature parameter conditions +25 +25 -40 to +85 -40 to +125 units min/ max input characteristics output level shift voltage (v ols ) input voltage clamp (v clamp ) clamp charge current voltage gain (a v ) v in = 0v, no load i in = -1ma v in = v clamp - 100mv r l = 150 ? 380 -105 -5 2.0 570 -220 -5.9 1.95 2.04 670 -300 -8.0 1.91 2.08 700 -350 -9.0 1.90 2.09 mv mv ma v/v v/v max min min min max output characteristics output voltage high swing v in = 3v, r l = 150 ? to gnd 4.4 4.3 4.25 4.2 v min power supply operating voltage range power supply rejection ratio (psrr) quiescent current (i q ) v s = 3.3v to 5.5v v in = 500mv 60 21 3.3 5.5 58 26 57 30 56 33 v v db ma min max min max dynamic performance 0.1db bandwidth -3db bandwidth filter response normalized gain: f in = 27mhz slew rate differential gain (dg) differential phase (dp) group delay variation (d/dt) crosstalk (channel-to-channel) fall time rise time r l = 150 ? r l = 150 ? 20% to 80%, v in = 1v step ntsc & pal dc-coupled ntsc & pal ac-coupled ntsc & pal dc-coupled ntsc & pal ac-coupled difference between 400khz and 6.5mhz at 1mhz 2.0v step , 80% to 20% 2.0v step , 80% to 20% 5.5 9.0 -46 44 0.57 0.86 0.85 1.41 31 -64 36 38 mhz mhz db v/ s % % ns db ns ns typ typ typ typ typ typ typ typ typ typ typ typ
triple, 9mhz, 3rd-order sdtv video filter driver 4 sg micro corp www.sg-micro.com SGM9115 typical performance characteristics at v s = +5.0v, t a = +25 , r l = 150 ? , all outputs ac-coupled with 220 f, unless otherwise noted. frequency response -15 -12 -9 -6 -3 0 3 0.1 1 10 100 frequency (mhz) normalized gain (db) large signal step response -0.75 -0.5 -0.25 0 0.25 0.5 0.75 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 time ( s) output voltage (v) psrr vs. frequency (with bypass caps) -90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 0.01 0.1 1 10 100 frequency (mhz) psrr (db) phase vs. frequency -270 -180 -90 0 90 180 270 0.1 1 10 100 frequency (mhz) phase (degree) small signal step response -0.3 -0.2 -0.1 0 0.1 0.2 0.3 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 time ( s) output voltage (v) psrr vs. frequency (without bypass caps) -80 -70 -60 -50 -40 -30 -20 -10 0 0.01 0.1 1 10 100 frequency (mhz) psrr (db)
triple, 9mhz, 3rd-order sdtv video filter driver 5 sg micro corp www.sg-micro.com SGM9115 typical performance characteristics at v s = +5.0v, t a = +25 , r l = 150 ? , all outputs ac-coupled with 220 f, unless otherwise noted. group delay vs. frequency -100 -50 0 50 100 0.1 1 10 100 frequency (mhz) group delay (ns) output voltage swing to the positive rail vs. output current 3 3.5 4 4.5 5 0 20406080100 output current (ma) output voltage (v) +85 -40 +25 gain er ror vs. temp erature 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 -50 -25 0 25 50 75 100 125 tempera ture ( ) gain error (%) quiescent current vs. supply voltage 10 14 18 22 26 30 3 3.5 4 4.5 5 5.5 supply voltage (v) quiescent current (ma) output voltage swing to the negative rail vs. output current 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 20406080100 output current (ma) output voltage (v) v in = 0 v +85 -40 quiescent current vs. temperature 10 14 18 22 26 30 -50 -25 0 25 50 75 100 125 temperature ( ) quiescent current (ma)
triple, 9mhz, 3rd-order sdtv video filter driver 6 sg micro corp www.sg-micro.com SGM9115 application information functional description SGM9115 operates from a single 3.3v to 5v supply. in application, SGM9115 is a fully integrated solution for filtering and buffering sdtv signals in front of video decoder or behind video encoder. for example, SGM9115 can replace three passive lc filters and three amplifier drivers at cvbs and s-video output side in set-top box and dvd player. this solution can help reduce pcb size and production cost, and it also improves video signal performance comparing with traditional design using discrete components. SGM9115 features a dc-coupled input buffer, a 3-pole low-pass filter to eliminate out-of-band noise of video encoder, and a gain of 6db in the output amplifier to drive 75 ? load. the ac- or dc-coupled input buffer eliminates sync crush, droop, and field tilt. the output of SGM9115 also can be dc-coupled or ac-coupled. input considerations besides ac coupling, the SGM9115 inputs also can be dc-coupled. in dc coupling application, no input coupling capacitors are needed because the amplitude of input video signal from dac includes ground and extends up to 1.4v, and SGM9115 can be directly connected to the output of a single-supply, current-output dac without any external bias network. in applications where dac?s output level exceeds the range from 0v to 1.4v, or SGM9115 is driven by an unknown external source or a scart switch which has its own clamping circuit, ac coupling is needed. output considerations the SGM9115 outputs can be dc-coupled or ac-coupled. when input is 0v, the SGM9115 output voltage is 260mv typically. in dc coupling design, one 75 ? resistor is used to connect SGM9115?s output pin with external load directly, and this serial back-termination resistor is used to match the impedance of the transmission line between SGM9115 and external load to cancel the signal reflection. the SGM9115 outputs can sink and source current allowing the device to be ac-coupled with external load. in ac coupling, at least 220f capacitor will be used in order to eliminate field tilt. power-supply bypassing and layout correct power supply bypassing is very important for optimizing video performance in design. one 0.1f and one 10f capacitors are always used to bypass +v s pin of SGM9115. place these two capacitors as close to the SGM9115 supply pin as possible. a large ground plane is also needed to ensure optimum performance. the input and output termination resistors should be placed as close to the related pins of SGM9115 as possible to avoid performance degradation. the pcb traces at the output side should have 75 ? characteristic impedance in order to match the 75 ? characteristic impedance of the cable connecting external load. in design, keep the board trace at the inputs and outputs of the SGM9115 as short as possible to minimize the parasitic stray capacitance and noise pickup.
triple, 9mhz, 3rd-order sdtv video filter driver 7 sg micro corp www.sg-micro.com SGM9115 application information typical application diagram the following schematic in figure 3 is normally used for ac-coupled output and dc-coupled input with dac which has an output voltage range from 0v to 1.4v. ac-coupled output offers slightly lower power dissipation and high esd protection ability. the schematics in figure 1 and figure 2 are also popular in design. figure 4 is a kind of special application in stb. cvbs 1 y c 75 1 2 3 4 5 6 7 8 in1 in2 in3 gnd out1 out2 out3 +v s 75 75 75 SGM9115 0.1f or 0.01f 10f +5v 75 75 cvbs 1 y c s-video s-video figure 1. dc coupling application schematic 4 5 6 7 8 in1 in2 in3 gnd out1 out2 out3 +v s 75 75 75 SGM9115 0.1f or 0.01f 10f +5v cvbs 1 y c 220f 220f 220f s-video cvbs 1 y c 75 1 2 3 75 75 s-video figure 3. input dc coupling and output ac coupling application schematic cvbs 1 y c 75 1 2 3 4 5 6 7 8 in1 in2 in3 gnd out1 out2 out3 +v s 75 75 75 SGM9115 0.1f or 0.01f 10f +5v 75 75 cvbs 1 y c 0.1f 0.1f 0.1f 220f 220f 220f s-video s-video figure 2. ac coupling application schematic
triple, 9mhz, 3rd-order sdtv video filter driver 8 sg micro corp www.sg-micro.com SGM9115 application information soc of stb 4 5 6 7 8 in1 in2 in3 gnd out1 out2 out3 +v s 75 75 75 SGM9115 0.1f or 0.01f 10f 220f 220f 220f 75 1 2 3 75 75 y pb pr v cc a b c 75 220f 75 220f 75 220f to loading 1 to loading 2 to loading 1 to loading 2 to loading 1 to loading 2 the three leads of a, b and c should be connected immediately to signal output in layout. figure 4. input dc coupling and output ac coupling application schematic in stb note: 1. power supply v cc must be sequenced on first before input video signals.
triple, 9mhz, 3rd-order sdtv video filter driver 9 sg micro corp www.sg-micro.com SGM9115 package outline dimensions soic-8 d e e1 e b a a2 a1 c l 1.27 0.6 2.2 5.2 recommended land pattern (unit: mm) dimensions in millimeters dimensions in inches symbol min max min max a 1.350 1.750 0.053 0.069 a1 0.100 0.250 0.004 0.010 a2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 d 4.700 5.100 0.185 0.200 e 3.800 4.000 0.150 0.157 e1 5.800 6.200 0.228 0.244 e 1.27 bsc 0.050 bsc l 0.400 1.270 0.016 0.050 0 8 0 8
triple, 9mhz, 3rd-order sdtv video filter driver 10 sg micro corp www.sg-micro.com SGM9115 tape and reel information note: the picture is only for reference. please make the object as the standard. key parameter list of tape and reel package type reel diameter reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p0 (mm) p1 (mm) p2 (mm) w (mm) pin1 quadrant soic-8 13 12.4 6.4 5.4 2.1 4.0 8.0 2.0 12.0 q1 reel width (w1) reel diameter reel dimensions tape dimensions direction of feed p2 p0 w p1 a0 k0 b0 q1 q2 q4 q3 q3 q4 q2 q1 q3 q4 q2 q1
triple, 9mhz, 3rd-order sdtv video filter driver 11 sg micro corp www.sg-micro.com SGM9115 carton box dimensions note: the picture is only for reference. please make the object as the standard. key parameter list of carton box reel type length (mm) width (mm) height (mm) pizza/carton 13 386 280 370 5

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