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| general description the MAX9512 video filter amplifier with smartsleep and y/c mixer is ideal for portable media players (pmps), portable dvd players, and set-top boxes (stbs). the inputs can be directly connected to the digi- tal-to-analog converter (dac) outputs. the dual recon- struction filters remove high-frequency signals above 6.75mhz. the y/c-to-cvbs mixer creates a composite video signal from luma and chroma. the four amplifiers each have 6db of gain. the outputs can be dc-coupled to a load of 75 ? , which is equivalent to two video loads, or ac-coupled to a load of 150 ? . the smartsleep circuitry intelligently reduces power consumption based on the presence of the input signal and the output loads. when the MAX9512 does not detect the presence of sync on luma, the supply cur- rent is reduced to less than 7?. the device only enables a video amplifier when there is an active video input signal and an attached load. the video amplifier remains on while a load is connected. if the load is dis- connected, the video amplifier is turned off. the MAX9512 operates from a 2.7v to 3.6v single sup- ply and is offered in a small, 16-pin tqfn (3mm x 3mm) package. the device is specified over the -40? to +125? automotive temperature range. applications features smartsleep feature detects input signal and output load status to reduce power consumption dual standard-definition video reconstruction filters with 6.75mhz passband luma and chroma inputs y/c-to-cvbs mixer luma, chroma, and two composite outputs supports two video loads at each output (dc-coupled) 2.7v to 3.6v single-supply operation MAX9512 video filter amplifier with smartsleep and y/c mixer circuit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ maxim integrated products 1 top view 15 16 + 14 13 5 6 7 gnd n.c. 8 v dd cvbsout1 cvbsout2 cout 13 n.c. 4 12 10 9 smartsleep cin gnd n.c. shdn n.c. MAX9512 yin yout 2 11 v dd thin qfn (3mm x 3mm) pin configurations cin yin cout yout cvbsout1 shdn active video detect smartsleep cvbsout2 lpf control logic buffer load sense 6db lpf buffer load sense 6db load sense 6db load sense 6db MAX9512 block diagrams ordering information 19-0535; rev 0; 5/06 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or vis it maxim? website at www.maxim-ic.com. note: all devices specified over the -40? to +125? operating temperature range. + denotes lead-free package. * future product?ontact factory for availability. ** ep = exposed pad. part pin-package pkg code top mark MAX9512ate+ 16 tqfn-ep** (3mm x 3mm) t1633-4 aen MAX9512aee+* 16 qsop e16-4 smartsleep is a trademark of maxim integrated products, inc. pin configurations continued at end of data sheet. block diagrams continued at end of data sheet. portable media players (pmps) portable dvd players set-top boxes (stbs) portable applications
absolute maximum ratings electrical characteristics (v dd = v shdn = 3.3v, v smartsleep = gnd = 0v. r l = no load. t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. (all voltages referenced to gnd) v dd ...........................................................................-0.3v to +4v cin, yin, smartsleep, shdn ...............................-0.3v to +4v duration of cout, yout, cvbsout1, cvbsout2 short circuit to v dd or gnd....................................continuous continuous input current (cin, yin, smartsleep, shdn )...................................................?0ma continuous power dissipation (t a = +70?) 16-pin tqfn (derate 15.6mw/? above +70?) ........1250mw 16-pin qsop (derate 8.3mw/? above +70?)............667mw operating temperature range .........................-40? to +125? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units supply voltage range v dd guaranteed by psrr 2.7 3.6 v yin = 0.3v, cin = 0.6v 13 16 ma smartsleep = v dd , yin has no active video signal 714 supply current i dd smartsleep = v dd , yin has a black-burst video signal with sync tip at gnd (note 2) 17 ? shutdown supply current i shdn v shdn = gnd 0.01 10 ? smartsleep characteristics minimum line frequency yin 14.3 khz sync slice level yin 4.1 5.2 % v dd output load detect threshold r l to gnd, sync pulse present 200 ? dc characteristics 2.7v < v dd < 3.6v 0 1.05 input-voltage range v in cin, yin, guaranteed by output voltage swing 3.0v < v dd < 3.6v 0 1.2 v input current i in cin = yin = 0v 2 5 ? input resistance r in cin, yin 20 m ? t a = -40? to +85? 5.7 6 6.3 0v v in 1.05v, v dd = 2.7v t a = -40? to +125? 5.6 6.3 t a = -40? to +85? 5.7 6 6.3 dc voltage gain a v r l = 150 ? to v dd / 2 0v v in 1.2v, v dd = 3.0v t a = -40? to +125? 5.6 6.3 db MAX9512 video filter amplifier with smartsleep and y/c mixer circuit 2 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ electrical characteristics (continued) (v dd = v shdn = 3.3v, v smartsleep = gnd = 0v. r l = no load. t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units 0v v in 1.05v, v dd = 2.7v -0.2 0 +0.2 dc gain matching 0v v in 1.2v, v dd = 3.0v -0.2 0 +0.2 db output level cin = yin = 0v, r l = 150 ? to gnd 0.188 0.3 0.400 v t a = -40? to +85? 2.027 2.1 2.163 measured at output, v dd = 2.7v, 0v v in 1.05v, r l = 150 ? to -0.2v t a = -40? to +125? 2.006 2.163 measured at output, v dd = 2.7v, 0v v in 1.05v, r l = 150 ? to v dd / 2 2.027 2.1 2.163 t a = -40? to +85? 2.316 2.4 2.472 measured at output, v dd = 3v, 0v v in 1.2v, r l = 150 ? to -0.2v t a = -40? to +125? 2.292 2.472 measured at output, v dd = 3v, 0v v in 1.2v, r l = 150 ? to v dd / 2 2.316 2.4 2.472 output voltage swing measured at output, v dd = 3.135v, 0v v in 1.05v, r l = 75 ? to -0.2v 2.027 2.1 2.163 v p-p output resistance r out v out = 1.3v, -5ma i load +5ma 0.47 ? power-supply rejection ratio psrr 2.7v v dd 3.6v, input referred, r l = 150 ? to gnd 48 db output shutdown impedance 28 k ? logic inputs (smartsleep, s s s s h h h h d d d d n n n n ) logic-low threshold v il 0.3 x v dd v logic-high threshold v ih 0.7 x v dd v logic input current i il /i ih v i = 0v or v dd 0.01 10 ? MAX9512 video filter amplifier with smartsleep and y/c mixer circuit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 3 ac characteristics (v dd = v shdn = +3.3v, v smartsleep = gnd = 0v, r l = 150 ? to gnd. t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units v dd = 2.7v, yin = 0.65v, cin = 0.7v p-p 1.4 color subcarrier output voltage swing v dd = 3.0v, yin = 0.75v, cin = 0.9v p-p 1.8 v p-p mixer hpf -3db frequency 300 khz f = 5.5mhz -0.1 f = 6.75mhz -1 -0.3 +1 f = 11mhz -3 standard-definition reconstruction filter inputs are 1v p-p , reference frequency is 1mhz f = 27mhz -33 -41 db dc-coupled output, 5-step modulated staircase f = 3.58mhz or 4.43mhz 0.2 differential gain dg ac-coupled output, 5-step modulated staircase f = 3.58mhz or 4.43mhz 0.4 % f = 3.58mhz 0.62 dc-coupled output, 5-step modulated staircase f = 4.43mhz 0.75 f = 3.58mhz 0.78 differential phase dp ac-coupled output, 5-step modulated staircase f = 4.43mhz 1.01 degrees 2t pulse response 2t = 200ns or 250ns 0.2 k% MAX9512 video filter amplifier with smartsleep and y/c mixer circuit 4 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ac characteristics (continued) (v dd = v shdn = +3.3v, v smartsleep = gnd = 0v, r l = 150 ? to gnd. t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units 2t bar response bar time is 18?, the beginning 2.5% and the ending 2.5% of the bar time is ignored, 2t = 200ns or 250ns 0.2 k% 2t pulse-to-bar k rating bar time is 18?, the beginning 2.5% and the ending 2.5% of the bar time is ignored, 2t = 200ns or 250ns 0.3 k% nonlinearity 5-step staircase 0.1 % interchannel timing error difference in time between the 50% point of the output signals, yout to cout 0.2 ns group delay distortion 100khz f 5mhz, inputs are 1v p-p 10 ns interchannel group delay distortion error outputs are 2v p-p 2ns peak signal to rms noise 100khz f 5mhz, inputs are 1v p-p 67 db power-supply rejection ratio f = 100khz, 200mv p-p , input referred 43 db output impedance f = 5mhz 6 ? enable time yin = 1v, output settled to within 1% of the final voltage, r l = 150 ? to gnd 13 ? disable time yin = 1v, output settled to within 1% of the final voltage, r l = 150 ? to gnd 1.1 ? crosstalk all hostile output crosstalk f = 4.43mhz -71 db all hostile input crosstalk f = 4.43mhz, shdn = gnd, input termination resistors are 75 ? -106 db MAX9512 video filter amplifier with smartsleep and y/c mixer circuit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 5 note 1: all devices are 100% production tested at t a = +25?. specifications over temperature limits are guaranteed by design. note 2: specified current is an average over time. MAX9512 video filter amplifier with smartsleep and y/c mixer circuit 6 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ typical operating characteristics (v dd = shdn = +3.3v, v smartsleep = gnd = 0v. video outputs have r l = 150 ? connected to gnd. t a = +25?, unless otherwise noted.) small-signal gain vs. frequency MAX9512 toc01 frequency (hz) output amplitude (db) 10m 1m -50 -40 -30 -20 -10 0 10 20 -60 100k 100m v out = 100mv p-p normalized to 1mhz small-signal gain flatness vs. frequency MAX9512 toc02 frequency (hz) output amplitude (db) 1m 10m -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1.0 -1.0 100k 100m v out = 100mv p-p normalized to 1mhz large-signal gain vs. frequency MAX9512 toc03 frequency (hz) output amplitude (db) 10m 1m -50 -40 -30 -20 -10 0 10 20 -60 100k 100m v out = 2v p-p normalized to 1mhz large-signal gain flatness vs. frequency MAX9512 toc04 frequency (hz) output amplitude (db) 1m 10m -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1.0 -1.0 100k 100m v out = 2v p-p normalized to 1mhz group delay MAX9512 toc05 frequency (hz) delay (ns) 10m 1m 0 25 50 75 100 125 150 -25 100k 100m v out = 2v p-p power-supply rejection ratio vs. frequency MAX9512 toc06 frequency (hz) psrr (db) 10m 1m 100k -70 -60 -50 -40 -30 -20 -10 0 -80 10k 100m quiescent supply current vs. temperature MAX9512 toc07 temperature ( c) supply current (ma) 100 75 50 25 0 -25 11.5 12.0 12.5 13.0 13.5 14.0 11.0 -50 125 voltage gain vs. temperature MAX9512 toc08 temperature ( c) voltage gain (v/v) 100 75 50 25 0 -25 1.96 1.97 1.98 2.00 1.99 2.01 2.02 1.95 -50 125 MAX9512 video filter amplifier with smartsleep and y/c mixer circuit _______________________________________________________________________________________ 7 output voltage vs. input voltage MAX9512 toc09 input voltage (v) output voltage (v) 1.5 1.0 0.5 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 -0.5 -0.5 2.0 yin, cin inputs only differential gain and phase MAX9512 toc10 step differential gain (%) differential phase (deg) 5 4 3 2 -0.2 -0.1 0 0.1 0.2 0.3 -0.3 -0.8 -0.4 0 0.4 0.8 17 6 5 4 3 2 17 6 2t response MAX9512 toc11 100ns/div v in 200mv/div v out 400mv/div 12.5t response MAX9512 toc12 400ns/div yin 200mv/div yout 400mv/div ntc-7 video test signal generated from luma and chroma inputs MAX9512 toc13 10 s/div cin 500mv/div cvbout1 1v/div yin 500mv/div pal multiburst response MAX9512 toc14 10 s/div cvbsin 500mv/div cvbsout1 1v/div pal color bars MAX9512 toc15 10 s/div cvbsin 500mv/div cvbsout1 1v/div field square-wave response MAX9512 toc16 2ms/div cvbsin 500mv/div cvbsout1 1v/div typical operating characteristics (continued) (v dd = shdn = +3.3v, v smartsleep = gnd = 0v. video outputs have r l = 150 ? connected to gnd. t a = +25?, unless otherwise noted.) MAX9512 video filter amplifier with smartsleep and y/c mixer circuit 8 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ typical operating characteristics (continued) (v dd = shdn = +3.3v, v smartsleep = gnd = 0v. video outputs have r l = 150 ? connected to gnd. t a = +25?, unless otherwise noted.) enable time MAX9512 toc17 2 s/div output 1v/div shdn 1v/div input voltage = 1v disable time MAX9512 toc18 200ns/div output 1v/div shdn 1v/div input voltage = 1v frequency response at 6.75mhz distribution MAX9512 toc19 attenuation (db) probability -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 0 frequency response at 27mhz distribution MAX9512 toc20 attenuation (db) probability -34 -36 -40 -38 -48 -46 -44 -42 -50 -52 -32 input-to-input crosstalk vs. frequency MAX9512 toc21 frequency (hz) crosstalk (db) 10m 1m -100 -80 -60 -40 -20 0 -120 100k 100m output-to-output crosstalk vs. frequency MAX9512 toc22 frequency (hz) crosstalk (db) 10m 1m -100 -80 -60 -40 -20 0 -120 100k 100m output impedance vs. frequency MAX9512 toc23 frequency (hz) output impedance ( ? ) 1m 10m 1 10 100 0.1 100k 100m MAX9512 video filter amplifier with smartsleep and y/c mixer circuit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 9 pin description pin tqfn qsop name function 1, 13 3, 15 v dd power supply. bypass with a 0.1? capacitor to gnd. 2 4 yin luma video input. directly connect this input to the video dac output. 3, 8 5, 10 gnd ground 4, 5, 7, 14 6, 7, 9, 16 n.c. no connection. connect to gnd. 68 shdn active-low shutdown logic input. connect to logic low to place device in shutdown. connect to logic high for normal operation. 9 11 cvbsout2 cvbs output 2 10 12 cvbsout1 cvbs output 1 11 13 yout luma video output 12 14 cout chroma video output 15 1 smartsleep smartsleep logic input. connect to logic high to activate smartsleep operation. 16 2 cin chroma video input. directly connect this input to the video dac output. ep ep exposed pad. connect ep to gnd. ep is also internally connected to gnd. current dac current dac video encoder chroma luma cvbs1 cin yin cout yout cvbsout1 cvbsout2 lpf gnd +3.3v 0.1 f v dd buffer load sense 6db 75 ? 75 ? 75 ? cvbs2 lpf buffer load sense 6db load sense 6db 75 ? load sense 6db MAX9512 shdn active video detect smartsleep +3.3v control logic figure 1. typical application circuit for portable media players MAX9512 video filter amplifier with smartsleep and y/c mixer circuit 10 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ cvbs1 cin no video signal yin cout yout cvbsout1 cvbsout2 lpf gnd +3.3v v dd load sense 6db 75 ? 75 ? lpf buffer load sense buffer 6db load sense 6db 75 ? load sense 6db 75 ? MAX9512 7 a chroma luma current dac current dac video encoder off off off off off off off off off off off off off cvbs2 shdn active video detect smartsleep control logic +3.3v figure 2. standby mode operation detailed description in the typical application circuit (figure 1), the current dacs on a video encoder generate luma and chroma video signals. the MAX9512 filters those signals and then adds them together to create the composite video signal. the output amplifiers drive the video connectors through a 75 ? back termination resistor. smartsleep feature the smartsleep feature is activated when the smartsleep input is connected to logic high. the smartsleep feature provides intelligent power manage- ment by selectively disabling the filters and output ampli- fiers based on the presence of a luma video signal or loads attached to the outputs. if the smartsleep feature is not activated and the part is not in shutdown, the filters and output amplifiers completely turn on, regardless of whether there is a video signal at the yin input and whether there are loads connected at the outputs. smartsleep only works with dc-coupled loads. standby mode in standby mode, the filters and output amplifiers are off and only the active video detect circuit is active. quiescent current consumption is approximately 7? (figure 2). the active video detect circuit checks if sync is present on the yin signal. if no sync is detected the device remains in standby mode. MAX9512 video filter amplifier with smartsleep and y/c mixer circuit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 11 active-detect mode the active video detect circuit slices the yin signal at 4.7% of the power supply (155mv for a 3.3v supply). if the transitions occur at a rate of 14khz or higher, then a video signal is present. when the MAX9512 detects a video signal with sync at the yin input, the control logic enters the active-detect mode and enables the load sense circuitry (figure 3). the supply current is typically 17?. if an output load is not connected to any amplifier, the MAX9512 remains in active-detect mode. eight times per second, each load-sense circuit checks for a load by connecting an internal 15k ? pullup resistor to the output for 1ms. if the output is pulled up, then no load is pre- sent. if the output stays low, a load is connected. full-operation mode if a load is connected to an output, the corresponding filter and amplifier turn on and remain on until the out- put load is disconnected. in full-operation mode, smartsleep intelligently reduces the supply current based on the input signal presence and output loading. figures 4 and 5 show which portions of the MAX9512 turn on and which remain off with different load configu- rations. in figure 4, both filters and the y/c mixer turn on to generate the composite video signal for the amplifier connected to cvbsout1. in figure 5, only the luma filter turns on, and the y/c mixer stays off. when an amplifier is on, it continually checks if the load has been disconnected by detecting if the amplifier output is sourcing current during a horizontal line time. if no sourcing current is detected within one horizontal line time (approximately 64?), the load has been dis- connected and the amplifier returns to active-detect mode. if, at any time, the input video signal is removed, the MAX9512 returns to standby mode. if the smartsleep feature is not activated and the part is not in shutdown, then the filters and amplifiers com- pletely turn on, regardless of whether there is a video signal at the cvbsin input and whether there are loads connected at the outputs. cvbs1 cin yin cout yout cvbsout1 cvbsout2 lpf gnd +3.3v v dd load sense 6db 75 ? 75 ? lpf buffer load sense buffer 6db load sense 6db 75 ? load sense 6db 75 ? MAX9512 17 a chroma luma no loads current dac current dac video encoder video signal present off off off off off off off off off cvbs2 shdn smartsleep control logic active video detect +3.3v figure 3. active-detect mode with no output loads MAX9512 video filter amplifier with smartsleep and y/c mixer circuit 12 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ figure 4. full operation mode with cvbsout1 loaded cin yin cout yout cvbsout1 cvbsout2 gnd +3.3v v dd load sense 6db 75 ? 75 ? load sense 6db load sense 6db 75 ? load sense 6db 75 ? MAX9512 5ma quiescent supply current plus output load current chroma luma cvbs1 75 ? current dac video signal present current dac video encoder buffer buffer off off off cvbs 2 shdn active video detect smartsleep +3.3v control logic lpf lpf MAX9512 video filter amplifier with smartsleep and y/c mixer circuit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 13 figure 5. full operation mode with yout loaded cin yin cout cvbsout2 lpf gnd +3.3v v dd load sense 6db 75 ? buffer 75 ? load sense 6db MAX9512 2.9ma quiescent supply current plus output load current chroma yout 75 ? load sense 6db luma 75 ? current dac video signal present current dac video encoder off lpf off buffer off off off cvbs2 shdn active video detect smartsleep +3.3v control logic cvbsout1 load sense 6db 75 ? cvbs1 off MAX9512 video filter amplifier with smartsleep and y/c mixer circuit 14 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ inputs the MAX9512 video inputs yin and cin should be directly connected to the output of the video current dac. dc-coupling ensures that the input signals are ground referenced such that the sync tip of the luma signal is within 50mv of ground and the blank level of the chroma signal is between 0.5v and 0.65v. video reconstruction filter the MAX9512 filter passband is 6.75mhz, which makes the device suitable for the higher bandwidth video sig- nals from a dvd chip. broadcast video signals actually require less bandwidth because of channel limitations: ntsc signals have 4.2mhz bandwidth, and pal signals have 5mhz bandwidth. video signals from a dvd player are not channel limited; therefore, the bandwidth of dvd video signals can push right against the nyquist limit of 6.75mhz. (recommendation itu-r bt.601-5 specifies 13.5mhz as the sampling rate for standard-definition video). therefore, the maximum bandwidth of the signal is 6.75mhz. to ease the filtering requirements, most modern video systems oversample by two times; clock- ing the video current dac at 27mhz. y/c mixer the y/c mixer adds the luma and chroma signals together to create a composite video signal. since chroma is a phase modulated carrier at 3.58mhz for ntsc and 4.43mhz for pal, the chroma signal is ac- coupled into the y/c mixer so that the variation in blank level from one video source to another video source does not affect the dc bias of the composite video sig- nal. the highpass corner frequency of the chroma ac- coupling circuit is 300khz. outputs the video output amplifiers can both source and sink load current, allowing output loads to be dc- or ac- coupled. the amplifier output stage needs about 300mv of headroom from either supply rail. the MAX9512 has an internal level shift circuit that positions the sync tip at approximately 300mv at the output. the blank level of the chroma output is positioned at approximately 1.3v if the blank level of the chroma input signal is 0.5v. the blank level of the chroma out- put is positioned at approximately 1.5v if the blank level of the chroma input signal is 0.6v. if the supply voltage is greater than 3.135v (5% below a 3.3v supply), each amplifier can drive two dc-cou- pled video loads to ground. if the supply is less than 3.135v, each amplifier can drive only one dc-coupled or ac-coupled video load. shutdown when shdn is low, the MAX9512 draws less than 1? supply current. all the amplifier outputs become high impedance. the effective output resistance at the video outputs is 28k ? , due to the internal feedback resistors to ground. applications information reducing power consumption in the video dacs yin and cin have high-impedance input buffers and can work with source resistances as high as 300 ? . to reduce power dissipation in the video dacs, the dac output resistor can be scaled up in value. the refer- ence resistor that sets the reference current inside the video dacs must also be similarly scaled up. for instance, if the output resistor is 37.5 ? , the dac must source 26.7ma when the output is 1v. if the output resistor is increased to 300 ? , the dac only needs to source 3.33ma when the output is 1v. there is parasitic capacitance from the dac output to ground. that capacitance in parallel with the dac out- put resistor forms a pole that can potentially roll off the frequency response of the video signal. for example, 300 ? in parallel with 50pf creates a pole at 10.6mhz. to minimize this capacitance, reduce the area of the signal trace attached to the dac output as much as possible, and place the MAX9512 as close to the video dac outputs as possible. MAX9512 video filter amplifier with smartsleep and y/c mixer circuit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 15 current dac current dac video encoder chroma cin yin cout yout cvbsout1 cvbsout2 lpf gnd +3.3v 0.1 f v dd buffer load sense 6db 75 ? 220 f 220 f 220 f 220 f 75 ? lpf buffer load sense 6db load sense 6db 75 ? load sense 6db 75 ? MAX9512 luma cvbs1 cvbs2 active video detect control logic shdn smartsleep 0v +3.3v figure 6. ac-coupling at the outputs ac-coupling the outputs the outputs can be ac-coupled since the output stage can source and sink current as shown in figure 6. coupling capacitors should be 220? or greater to keep the highpass filter formed by the 150 ? equivalent resistance of the video transmission line to a corner fre- quency of 4.8hz or below. the frame rate of pal sys- tems is 25hz, and the frame rate of ntsc systems is 30hz. the corner frequency should be well below the frame rate. power-supply bypassing and ground the MAX9512 operates from a single-supply voltage down to 2.7v, allowing for low-power operation. bypass v dd to gnd with a 0.1? capacitor. place all external components as close to the device as possible. MAX9512 video filter amplifier with smartsleep and y/c mixer circuit 16 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 smartsleep n.c. v dd cout yout cvbsout1 cvbsout2 gnd n.c. top view MAX9512 qsop cin v dd n.c. yin gnd n.c. shdn + pin configurations (continued) chip information process: bicmos cin yin cout yout cvbsout1 shdn active video detect smartsleep cvbsout2 lpf control logic buffer load sense 6db lpf buffer load sense 6db load sense 6db load sense 6db MAX9512 0 to 50mv 300mv to 400mv block diagrams (continued) MAX9512 video filter amplifier with smartsleep and y/c mixer circuit _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 17 package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation go to www.maxim-ic.com/packages .) 12x16l qfn thin.eps 0.10 c 0.08 c 0.10 m c a b d d/2 e/2 e a1 a2 a e2 e2/2 l k e (nd - 1) x e (ne - 1) x e d2 d2/2 b l e l c l e c l l c l c package outline 21-0136 2 1 g 8, 12, 16l thin qfn, 3x3x0.8mm marking aaaa MAX9512 video filter amplifier with smartsleep and y/c mixer circuit 18 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation go to www.maxim-ic.com/packages .) exposed pad variations 1.10 t1633-1 0.95 codes pkg. t1233-1 min. 0.95 nom. 1.10 d2 1.25 1.10 0.95 1.25 nom. 1.10 max. 1.25 min. 0.95 max. 1.25 e2 12 n k a2 0.25 ne a1 nd 0 0.20 ref - - 3 0.02 3 0.05 l e e 0.45 2.90 b d a 0.20 2.90 0.70 0.50 bsc. 0.55 3.00 0.65 3.10 0.25 3.00 0.75 0.30 3.10 0.80 16 0.20 ref 0.25 - 0 4 0.02 4 - 0.05 0.50 bsc. 0.30 2.90 0.40 3.00 0.20 2.90 0.70 0.25 3.00 0.75 3.10 0.50 0.80 3.10 0.30 pkg ref. min. 12l 3x3 nom. max. nom. 16l 3x3 min. max. 0.35 x 45 pin id jedec weed-1 0.35 x 45 weed-2 t1233-3 1.10 1.25 0.95 1.10 0.35 x 45 1.25 weed-1 0.95 t1633f-3 0.65 t1633-4 0.95 0.80 0.95 0.65 0.80 1.10 1.25 0.95 1.10 0.225 x 45 0.95 weed-2 0.35 x 45 1.25 weed-2 t1633-2 0.95 1.10 1.25 0.95 1.10 0.35 x 45 1.25 weed-2 no down bonds allowed yes no yes n/a no package outline 21-0136 2 2 g 8, 12, 16l thin qfn, 3x3x0.8mm yes weed-1 1.25 1.10 0.95 0.35 x 45 1.25 1.10 0.95 t1233-4 t1633fh-3 0.65 0.80 0.95 0.225 x 45 0.65 0.80 0.95 weed-2 n/a notes: 1. dimensioning & tolerancing conform to asme y14.5m-1994. 2. all dimensions are in millimeters. angles are in degrees. 3. n is the total number of terminals. 4. the terminal #1 identifier and terminal numbering convention shall conform to jesd 95-1 spp-012. details of terminal #1 identifier are optional, but must be located within the zone indicated. the terminal #1 identifier may be either a mold or marked feature. 5. dimension b applies to metallized terminal and is measured between 0.20 mm and 0.25 mm from terminal tip. 6. nd and ne refer to the number of terminals on each d and e side respectively. 7. depopulation is possible in a symmetrical fashion. 8. coplanarity applies to the exposed heat sink slug as well as the terminals. 9. drawing conforms to jedec mo220 revision c. 10. marking is for package orientation reference only. 11. number of leads shown are for reference only. 0.25 0.30 0.35 2 0.25 0 0.20 ref -- 0.02 0.05 0.35 8 2 0.55 0.75 2.90 2.90 3.00 3.10 0.65 bsc. 3.00 3.10 8l 3x3 min. 0.70 0.75 0.80 nom. max. tq833-1 1.25 0.25 0.70 0.35 x 45 no weec 1.25 0.70 0.25 MAX9512 video filter amplifier with smartsleep and y/c mixer circuit maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ____________________ 19 2006 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation go to www.maxim-ic.com/packages .) qsop.eps f 1 1 21-0055 package outline, qsop .150", .025" lead pitch |
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