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general description the MAX11504/max11505 integrated filters offer four channels of 5 th order filters for standard-definition video and include +6db output buffers on each channel. these video filters are ideal for anti-aliasing and dac smooth- ing in applications such as set-top boxes, security sys- tems, digital video recorders (dvrs), dvd players, and personal video recorders. the MAX11504/max11505 video inputs feature a trans- parent clamp compatible with ac- and dc-coupled input signals and allow dac outputs to be directly cou- pled. the 5 th order filters provide a bandwidth of 8.6mhz (typical). the MAX11504 offers a flat passband response on all channels. the max11505 offers a 0.8db peaking passband response on channel 1, resulting in a bandwidth of 8.9mhz (typical) and a flat passband response on all other channels. each channel includes an output buffer with a gain of +6db capable of driving a full 2v p-p video signal into two standard 150 ? (75 ? back terminated) video loads. the buffers drive either ac- or dc-coupled loads and assure a blanking level below 1v after the back-match resistor. the MAX11504/max11505 operate from a single +5v supply and are available in the 0? to +70? commer- cial temperature range. these devices are available in small 10-pin ?ax ? packages. applications set-top box receivers digital video recorders (dvrs) security video systems sdtv dvd players personal video recorders video on-demand features ? four-channel 5 th order filter for standard- definition video ? +6db output buffers ? transparent input clamp ? ac- or dc-coupled inputs ? ac- or dc-coupled outputs ? output buffers can drive two standard 150 ? video loads ? 12kv hbm esd protection on outputs ? flat passband response (MAX11504) ? 0.8db peaking passband response on channel 1 (max11505) ? single +5v power supply ? small 10-pin max package MAX11504/max11505 four-channel, standard-definition video filter ________________________________________________________________ maxim integrated products 1 19-1057; rev 0; 11/07 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information note: all devices are specified over the 0? to +70? commer- cial temperature range. simplified block diagram +6db +6db +6db in1 in2 in3 out1 out2 out3 gnd 8.6mhz 8.6mhz 8.9mhz* transparent clamp transparent clamp transparent clamp transparent clamp 8.6mhz +6db in4 out4 8.6mhz *max11505 with 0.8db peaking on channel 1 v cc MAX11504 max11505 part pin- package package code frequency response m a x1 1 5 0 4 c u b+ 10 ?ax u10+2 flat m a x1 1 5 0 5 c u b+ 10 ?ax u10+2 hf boost on channel 1 pin configuration 1 2 3 4 5 10 9 8 7 6 out1 out2 out3 out4 in4 in3 in2 in1 MAX11504 max11505 max top view gnd v cc ?ax is a registered trademark of maxim integrated products, inc.
MAX11504/max11505 four-channel, standard-definition video filter 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = +5v, r load = 150 ? to gnd, c in = 0.1?, t a = 0? to +70?. all frequency response is relative to 100khz.) 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. v cc to gnd..............................................................?.3v to +6v all other pins to gnd ..-0.3v to the lower of (v cc + 0.3v) and +6v continuous power dissipation (t a = +70?) 10-pin ?ax (derate 8.8mw/? above +70?) ........707.3mw maximum current into any pin except v cc and gnd......?0ma operating temperature range max1150_cub ...................................................0? to +70? storage temperature range .............................-65? to +150? junction temperature ......................................................+150? lead temperature (soldering, 10s) ..................................+300? parameter symbol conditions min typ max unit MAX11504 4.5 7.2 -1db bandwidth f 1db max11505, channel 1 5.0 7.8 mhz MAX11504 8.6 -3db bandwidth f 3db max11505, channel 1 8.9 mhz stopband attenuation a sb f = 27mhz 50 db low-frequency gain a v 5.5 6.0 6.5 db low-frequency gain matching a v ( match ) 0.02 db input voltage range v in referenced to gnd if dc-coupled 1.4 v differential gain dg all channels 0.1 % differential phase d all channels 0.3 degrees total harmonic distortion thd v out = 1.8v p-p , f = 1mhz (all channels) 0.1 % channel-to-channel crosstalk x talk f = 1mhz -70 db s i g nal - to- n oi se rati o snr ntc-7 weighting, 100khz, 4.2mhz 80 db propagation delay t pd f = 4.5mhz 76 ns power-supply rejection ratio psrr dc (all channels) 70 db supply-voltage range v cc 4.75 5 5.25 v supply current i cc no load 24 35 ma
MAX11504/max11505 four-channel, standard-definition video filter _______________________________________________________________________________________ 3 MAX11504 frequency response MAX11504toc01 frequency (mhz) response (db) 10 1 -40 -30 -60 -50 -20 -10 0 10 -70 0.1 100 MAX11504 passband response MAX11504toc02 frequency (mhz) response (db) 1 0 -5 5 10 -10 0.1 10 MAX11504 group delay vs. frequency MAX11504toc03 frequency (mhz) delay (ns) 1 60 20 40 100 80 120 0 0.1 10 100 MAX11504 differential gain, ntsc MAX11504toc04 differential gain (%) 0 -0.1 0.1 0.2 -0.2 167 5 4 3 2 MAX11504 differential phase, ntsc MAX11504toc05 differential phase (deg) 0 -0.2 0.2 0.4 -0.1 -0.3 0.1 0.3 -0.4 167 5 4 3 2 MAX11504 2t response MAX11504toc06 200ns/div in out typical operating characteristics (v cc = 5v, r l = 150 ? to gnd, t a = +25?) MAX11504 12.5t response MAX11504toc07 400ns/div in out MAX11504 multiburst response MAX11504toc08 10 s/div in out
MAX11504/max11505 four-channel, standard-definition video filter 4 _______________________________________________________________________________________ typical operating characteristics (continued) (v cc = 5v, r l = 150 ? to gnd, t a = +25?) max11505 frequency response MAX11504toc09 frequency (mhz) response (db) -30 -50 -10 10 -40 -60 -20 0 -70 0.1 100 10 1 max11505 passband response MAX11504toc10 frequency (mhz) response (db) 0 -5 5 10 -10 0.1 10 1 max11505 group delay vs. frequency MAX11504toc11 frequency (mhz) delay (ns) 60 40 100 20 80 120 0 0.1 1 100 10 max11505 differential gain, ntsc MAX11504toc12 differential gain (%) 0 -0.1 0.1 0.2 -0.2 167 5 4 3 2 max11505 differential phase, ntsc MAX11504toc13 differential phase (deg) 0 -0.2 0.2 0.4 -0.4 0.1 -0.1 0.2 -0.3 167 5 4 3 2 max11505 2t response MAX11504toc14 200ns/div in out max11505 12.5t response MAX11504toc15 400ns/div in out max11505 multiburst response MAX11504toc16 10 s/div in out
detailed description each channel of the MAX11504/max11505 contains a transparent input clamp, a 5 th order lowpass filter, and an output amplifier with +6db gain (see the functional diagrams and typical operating circuits ). the 5 th order lowpass filters provide a bandwidth of 8.6mhz (typical). the MAX11504 provides a flat passband response. the max11505 features a 0.8db high-frequency boost on channel 1 to help with system rolloff (for cvbs signals) and a flat passband response on all other channels. within the passband, each channel amplifies the signal by two and adds 280mv of offset. typical voltage levels are shown in figures 1 and 2. vvv out in = + (). 2028 MAX11504/max11505 four-channel, standard-definition video filter _______________________________________________________________________________________ 5 pin description pin name function 1 in1 video input channel 1. the max11505 provides 0.8db passband boost at high frequency. 2 in2 video input channel 2 3 in3 video input channel 3 4 in4 video input channel 4 5v cc power supply. bypass to ground with 0.1? and 1? capacitors. 6 gnd ground 7 out4 video output channel 4 8 out3 video output channel 3 9 out2 video output channel 2 10 out1 video output channel 1. the max11505 provides 0.8db passband boost at high frequency. input signal 0.30v 1.00v 0v output signal 0.88v 2.28v 0.28v in_ out_ MAX11504 max11505 figure 1. typical ac-coupled signal
MAX11504/max11505 transparent clamps all inputs feature transparent clamps that allow either ac or dc input coupling. the clamp remains inactive while the input signal is above ground, offering true dc input coupling. if the signal goes below ground, as occurs when it is ac-coupled, the clamp sets the sync tip slightly below the ground level. input coupling the choice of ac- or dc-coupling the input depends on the video source. many dacs provide a current output and are terminated to ground with a resistor; such signals are conveniently dc-coupled. use ac- coupling when the dc level of the video signal is unknown or outside the specified input range of the MAX11504/max11505, such as scart or v cc -termi- nated dac outputs. dc-coupled inputs if the input is dc-coupled, the input voltage must remain above zero but not exceed the maximum input voltage of 1.4v (typical). ac-coupled inputs if the input is ac-coupled, the transparent clamps are active and set the lowest point of the signal at ground. this is appropriate for unipolar signals such as y, r, g or b with or without sync pulse (figure 3). four-channel, standard-definition video filter 6 _______________________________________________________________________________________ input signal output signal in_ out_ MAX11504 max11505 0.32v 1.02v 0.02v 0v 0.92v 2.32v 0.32v figure 2. typical dc-coupled signal in_ 0.1 f dac encoder MAX11504 max11505 figure 3. simple ac-coupling for unipolar signals (y, r, g, b).
MAX11504/max11505 four-channel, standard-definition video filter _______________________________________________________________________________________ 7 for bipolar signals such as c, p b , and p r , bias the ac- coupled inputs to a fixed dc voltage, typically 0.59v, to ensure that the transparent clamp remains off. a suit- able network is shown in figure 4. determine the bias voltage using: where i l = the input leakage current (typically 0.5?). standard-definition filters the MAX11504/max11505 filters are optimized to deliv- er a flat passband along with high stop-band attenua- tion. the filter characteristic has been chosen to provide an excellent time domain response with low overshoot. the typical -3db frequency of 8.6mhz guarantees mini- mal attenuation in the passband while at the same time offering a 27mhz attenuation of typically -50db. channel 1 of the max11505 has 0.8db of high-frequency boost and a -3db frequency of 8.9mhz. output buffer the MAX11504/max11505 feature output buffers with +6db gain that drive two standard 150 ? video loads. a typical load (figure 5a) is a 75 ? back-match resistor, an optional 220? or larger coupling capacitor, and a 75 ? termination resistor. the MAX11504/max11505 clamp the signal, forcing the blanking level to less than 1v at the termination resis- tor. this allows driving video loads to meet digital tv specifications without the need for costly ac-coupling capacitors. when driving two parallel loads per output (figure 5b), thermal considerations must be taken into account, especially for dc-coupled outputs (see the junction temperature calculations section.) v r rr vir bccl = + ? 2 12 1 ( ) in_ r2 120k ? r1 820k ? 0.1 f dac encoder MAX11504 max11505 v cc figure 4. ac-coupling for bipolar signals (c, pb, pr) (a) (b) out_ 75 ? 220 f (optional) 75 ? MAX11504 max11505 out_ MAX11504 max11505 75 ? 220 f (optional) 75 ? 75 ? 220 f (optional) 75 ? figure 5. typical output loads
MAX11504/max11505 four-channel, standard-definition video filter 8 _______________________________________________________________________________________ applications information output configuration the MAX11504/max11505 outputs may be either dc- or ac-coupled. if ac-coupled, choose a capacitor that passes the lowest frequency content of the video sig- nal, and keep the line-time distortion within desired lim- its. the capacitor value is a function of the input leakage and impedance of the circuit being driven. common industry practice is to use a 220? or larger coupling capacitor. if any or all outputs are driving two parallel loads, refer to the junction temperature calculations. the MAX11504/max11505 outputs are fully protected against short circuits either to the ground or the positive supply of the device. the short-circuit protection cir- cuitry limits the output current to 80ma (typical) per out- put. shorting more than one output simultaneously can exceed the maximum package power dissipation. junction temperature calculations die temperature is a function of quiescent power dissi- pation and the power dissipation in the output drivers. calculate the power dissipated p d using: where p ds is the quiescent power dissipated in the die, and given by: and where p don is the power dissipated in the n th dri- ver stage and given by: where v ormsn is the rms output voltage and r l is the load resistance. example - assuming these conditions: 1. video standard = 525/60/2:1 2. video format = rgb with syncs on all channels 3. picture content = 100% white 4. the input signal is ac-coupled 5. the output signal is dc-coupled 6. v cc = 5.0v 7. i cc = 24ma a sync tip exists at 280mv and peak white exists at 2.28v. the rms voltage will be approximately 1.88v on each output (80% of the peak-peak voltage, plus the offset) giving: and the junction temperature is given by: where t j = junction temperature, t a = ambient temper- ature (assume +70?) and r ja = thermal resistance junction to ambient. from the absolute maximum ratings section of the data sheet, the derating factor is 8.8mw/? above +70?. r ja = 1/(derating factor) = 1/(8.8mw/?) = 113?/w. therefore: if there is only one video load on each output, the junc- tion temperature lowers to: the above calculations assume the use of a multilay- ered board with extensive ground planes for high ther- mal efficiency. using such a board is especially important in applications where there are two video loads on each channel. tc j =+ 101 tc j =+ =+ 70 113 0 432 119 . tt r p j a ja d =+ () pw d =++++= 0 12 0 078 0 078 0 078 0 078 0 432 ...... pw don = ? = (.). . 5 1 88 1 88 75 0 078 pw ds = = 5 0 024 0 12 .. p vv v r don cc ormsn ormsn l = ? () pv i ds cc cc = pppppp ddsdodododo =++++ 1234
MAX11504/max11505 four-channel, standard-definition video filter _______________________________________________________________________________________ 9 pcb layout recommendations to help with heat dissipation, connect the power and ground traces to large copper areas. bypass v cc to gnd with a 0.1? capacitor and 1.0? capacitors. surface-mount capacitors are recommended for their low inductance. place traces carrying video signals appropriately to avoid mutual coupling. if inputs are ac-coupled, place the capacitors as close as possible to the device and keep the traces short to minimize parasitic capacitance and inductance.
MAX11504/max11505 four-channel, standard-definition video filter 10 ______________________________________________________________________________________ functional diagrams and typical operating circuits +6db +6db +6db 75 ? gnd 8.6mhz 8.6mhz 8.9mhz ? clamp clamp clamp clamp 8.6mhz +6db 8.6mhz MAX11504 max11505 0.1 f* dac encoder 75 ? 75 ? 0.1 f* dac 75 ? 0.1 f* dac 75 ? 0.1 f* dac in1 in2 in3 in4 1 2 3 4 5 4 v cc 8 7 6 6 out1 *optional ? max11505 with 0.8db peaking on channel 1 reconstruction filter application out2 out3 out4 220 f* 75 ? 75 ? 220 f* 75 ? 75 ? 220 f* 75 ? 75 ? 220 f* 75 ? 1 f 0.1 f +5v
MAX11504/max11505 four-channel, standard-definition video filter ______________________________________________________________________________________ 11 functional diagrams and typical operating circuits (continued) +6db +6db +6db 75 ? gnd 8.6mhz 8.6mhz 8.9mhz ? clamp clamp clamp clamp 8.6mhz +6db 8.6mhz MAX11504 max11505 0.1 f* adc multichannel decoder 75 ? 75 ? 0.1 f* adc 75 ? 0.1 f* adc 75 ? 0.1 f* adc in1 in2 in3 in4 1 2 3 3 5 4 v cc 8 7 6 6 out1 *optional ? max11505 with 0.8db peaking on channel 1 out2 out3 out4 75 ? 75 ? 75 ? 75 ? 75 ? 75 ? 75 ? 1 f 0.1 f +5v anti-aliasing filter application chip information process: bicmos
MAX11504/max11505 four-channel, standard-definition video filter 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. 12 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2007 maxim integrated products is a registered trademark of maxim integrated products, inc. 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 .) 10lumax.eps package outline, 10l umax/usop 1 1 21-0061 rev. document control no. approval proprietary information title: top view front view 1 0.498 ref 0.0196 ref s 6 side view bottom view 0 0 6 0.037 ref 0.0078 max 0.006 0.043 0.118 0.120 0.199 0.0275 0.118 0.0106 0.120 0.0197 bsc inches 1 10 l1 0.0035 0.007 e c b 0.187 0.0157 0.114 h l e2 dim 0.116 0.114 0.116 0.002 d2 e1 a1 d1 min - a 0.940 ref 0.500 bsc 0.090 0.177 4.75 2.89 0.40 0.200 0.270 5.05 0.70 3.00 millimeters 0.05 2.89 2.95 2.95 - min 3.00 3.05 0.15 3.05 max 1.10 10 0.60.1 0.60.1 ? 0.500.1 h 4x s e d2 d1 b a2 a e2 e1 l l1 c gage plane a2 0.030 0.037 0.75 0.95 a1

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