general description the max7462/MAX7463 single-channel, standard-defini- tion, integrated video reconstruction filters and buffers are ideal for anti-aliasing and digital-to-analog smoothing video applications or wherever analog video is recon- structed from digital data (such as cable/satellite/terres- trial set-top boxes and dvrs). the max7462 includes a disable function, which places the output in a high-impedance state allowing multiplexing of multiple output signals. it also has an external gain control that sets the output buffer gain to either +6db or +9.5db. the higher gain setting allows a lower dac output signal than the standard 1v p-p sig- nal. the MAX7463 output buffer has a fixed gain of +6db. the max7462/MAX7463 operate from a single +5v supply and have a flat passband out to 5mhz with a stopband attenuation of -43db (typ) at 27mhz. these devices can drive two standard 150 ? ac-cou- pled or dc-coupled video loads. the output black level of the max7462/MAX7463 is less than 1v for dc-cou- pled outputs. the max7462 is available in an 8-pin ?ax package and an 8-pin so package. the MAX7463 is available in an 8-pin so package. all devices are specified over the 0? to +85? temperature range. applications cable/satellite/terrestrial set-top boxes dvrs hard-disk recorders features ? standard-definition cvbs video reconstruction filters and buffers ? passband: -0.05db at 5mhz ? stopband: -43db at 27mhz ? selectable gain: +6db and +9.5db (max7462) ? output disable (max7462) ? drives 2v p-p into two 150 ? video loads ? output black level < 1v for dc-coupled output ? very small max and so packages max7462/MAX7463 single-channel video reconstruction filters and buffers ________________________________________________________________ maxim integrated products 1 19-3790; rev 1; 9/05 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information part pin- package buffer gain (db) output disable max7462 uua* 8 ?ax +6/+9.5 selectable yes max7462usa 8 so +6/+9.5 selectable yes MAX7463 usa 8 so +6 fixed no note: all parts are specified over the 0? to +85? temperature range. * future product?ontact factory for availability. ?ax is a registered trademark of maxim integrated products, inc. pin configurations appear at end of data sheet. 75 ? 75 ? 220 f 220 f * * z o = 75 ? z o = 75 ? 75 ? 75 ? out +6db/+9.5db gain disable gnd lowpass filter v cc +5v dac in 0.1 f max7462 *optional functional diagram
max7462/MAX7463 single-channel video reconstruction filters and buffers 2 _______________________________________________________________________________________ absolute maximum ratings 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 ........................................................................+6.0v all other pins to gnd ...-0.3v to the lower of (v cc + 0.3v) and +6v maximum current into any pin except v cc and gnd .....?0ma continuous power dissipation (t a = +70?) 8-pin ?ax (derate 4.5mw/? above +70?) ?..... 362mw 8-pin so (derate 5.9mw/? above +70?) .......... 470.6mw operating temperature range...............................0? to +85? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? electrical characteristics (v cc = +5v ?%, c l = 0 to 20pf, r l = 75 ? , c in = 0.1?, gain = +6db, disable = v cc (max7462), t a =t min to t max , unless other- wise noted. typical values are at v cc = +5v, and t a = +25?.) parameter conditions min typ max units passband response f = 100khz to 5mhz, relative to 100khz -0.65 -0.05 +0.65 db stopband attenuation f 27mhz 39 43 db output dynamic swing gain = gnd (max7462) 2.0 2.4 v p-p output sync tip clamp level after termination (note 1) 0.30 0.45 0.55 v group delay deviation f = 100khz to 4.2mhz 11 ns differential gain five-step modulated staircase 0.15 % differential phase five-step modulated staircase 0.15 degrees signal-to-noise ratio output signal (2v p-p ) to rms noise (100hz to 5mhz) 75 db low-frequency gain accuracy f =100khz, relative to a gain of +6db -3 +3 % line time distortion 18?, 100 ire bar 0.1 % field time distortion 130 lines, 18?, 100 ire bar 0.1 % power-supply rejection ratio v in = 100mv p-p , f = 100khz 35 db supply current no load 25 35 ma note 1: measured after 75 ? back-match resistor. assume a 75 ? termination resistor.
max7462/MAX7463 single-channel video reconstruction filters and buffers _______________________________________________________________________________________ 3 amplitude vs. frequency max7462/63 toc01 frequency (mhz) amplitude (db) 10 1 -60 -40 -20 0 -80 0.1 100 normalized to 0db passband amplitude vs. frequency max7462/63 toc02 frequency (mhz) amplitude (db) 1 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 -2.0 0.1 10 normalized to 0db phase response vs. frequency max7462/63 toc03 frequency (mhz) phase (degrees) 1 -150 -100 -50 0 50 100 150 200 -200 0.1 10 group delay vs. frequency max7462/63 toc04 frequency (mhz) group delay (ns) 1 60 70 80 90 100 50 0.1 10 200ns/div 2t response out 250mv/div max7462/63 toc05 in 250mv/div 200ns/div modulated 12.5t response out 250mv/div max7462/63 toc06 in 250mv/div typical operating characteristics (v cc = +5v ?%, c l = 0 to 20pf, r l = 75 ? , c in = 0.1?, gain = +6db, disable = v cc (max7462), t a =t min to t max , unless other- wise noted. typical values are at v cc = +5v, and t a = +25?.)
max7462/MAX7463 single-channel video reconstruction filters and buffers 4 _______________________________________________________________________________________ typical operating characteristics (continued) (v cc = +5v ?%, c l = 0 to 20pf, r l = 75 ? , c in = 0.1?, gain = +6db, disable = v cc (max7462), t a =t min to t max , unless other- wise noted. typical values are at v cc = +5v, and t a = +25?.) 2ms/div out response to a field square wave out 500mv/div max7462/63 toc10 in 500mv/div 100ns/div disable turn-on time out 1v/div max7462/63 toc11 disable 2v/div gnd gnd 100ns/div out 1v/div max7462/63 toc12 disable 2v/div gnd gnd disable turn-off time 10 s/div multiburst response out 250mv/div max7462/63 toc09 in 250mv/div 10 20 30 40 supply current vs. temperature max7462/63 toc07 temperature ( c) supply current (ma) 01734 85 v in = +2v no load 51 68 differential gain max7462/63 toc08 differential phase (deg) 13 245 6 7 13 245 6 7 0.4 0.6 0.2 0 -0.2 -0.4 -0.6 differential gain (%) 0.2 0.3 0.1 0 -0.1 -0.2 -0.3 differential phase
detailed description the max7462/MAX7463 filters and buffers the analog cvbs video outputs of dac video-encoders in applica- tions such as set-top boxes, hard-disk recorders, dvd players, and digital vcrs. the max7462/MAX7463 con- sist of a lowpass filter and an output video buffer that can drive two standard 150 ? video loads. these devices operate from a single +5v supply and have a bandwidth optimized for interlaced ntsc, pal, and sdtv. filter the reconstruction filter is a 4th-order butterworth-type response that features a maximally flat passband for ntsc and pal bandwidths. the stopband attenuation is optimized for a video-encoder dac sampling fre- quency of 27mhz (see the typical operating characteristics ). output buffer the output buffer can drive two 150 ? video loads with a 2v p-p signal. for the max7462, the output buffer gain is selectable between +6db and +9.5db by using gain (see table 1). the MAX7463 has a fixed gain of +6db. the max7462/MAX7463 can drive an ac load or drive the video load directly without using a large output capacitor. the output buffer can drive dc loads while maintaining an output blanking level of less than 1v. the blanking level allows the max7462/MAX7463 to meet the digital tv interface specifications for dc coupling. applications information input considerations use a 0.1? ceramic capacitor to ac-couple the input. the input capacitor stores a dc voltage so that the out- put is clamped to the appropriate dc voltage level. output considerations the outputs are typically connected to a 75 ? series back-match resistor followed by the video cable. because of the inherent divide-by-two of this configura- tion, the blanking level on the video cable is always less than 1v, complying with industry-standard video requirements such as the digital tv standard (which allows up to 1vdc on the video cable) and the european scart standard (which allows up to 2vdc on the video cable). the video buffer can also drive an ac-coupled video load. good video performance is achieved with an output capacitor as low as 220?. power-supply bypassing and layout the max7462/MAX7463 operate from a single +5v supply. bypass v cc to gnd with a 0.1? capacitor. in addition, it is sometimes advantageous to connect a 10? capacitor within the general vicinity of the video circuitry. place all other external components as close to the device as possible. max7462/MAX7463 single-channel video reconstruction filters and buffers _______________________________________________________________________________________ 5 pin description pin max7462 MAX7463 name function 1 1 in video input. ac-couple in with a series 0.1? capacitor. 2 gain gain control input. connect gain to gnd for a gain of +6db (+2v/v). connect gain to v cc for a gain of +9.5db (+3v/v). 3, 4, 5 3 gnd ground 2, 4, 5, 6 n.c. no connection. not internally connected. connect to gnd for better performance. 6 disable disable input. connect to v cc to enable the output buffer (normal operation). connect to gnd to put the output buffer in a high-impedance state. 77v cc +5v supply input 8 8 out buffer output. this output can be either ac- or dc-coupled. use at minimum a 220? capacitor for ac-coupled loads. gain buffer gain (db) gnd +6 v cc +9.5 table 1. gain setting control (max7462)
max7462/MAX7463 single-channel video reconstruction filters and buffers 6 _______________________________________________________________________________________ chip information process: bicmos disable gnd gnd 1 2 8 7 out v cc gain gnd in top view 3 4 6 5 max7462 n.c. n.c. n.c. 1 2 8 7 out v cc n.c. gnd in 3 4 6 5 MAX7463 max/so so pin configurations
max7462/MAX7463 single-channel video reconstruction filters and buffers _______________________________________________________________________________________ 7 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 .) 8lumaxd.eps package outline, 8l umax/usop 1 1 21-0036 j rev. document control no. approval proprietary information title: max 0.043 0.006 0.014 0.120 0.120 0.198 0.026 0.007 0.037 0.0207 bsc 0.0256 bsc a2 a1 c e b a l front view side view e h 0.60.1 0.60.1 ?0.500.1 1 top view d 8 a2 0.030 bottom view 1 6 s b l h e d e c 0 0.010 0.116 0.116 0.188 0.016 0.005 8 4x s inches - a1 a min 0.002 0.95 0.75 0.5250 bsc 0.25 0.36 2.95 3.05 2.95 3.05 4.78 0.41 0.65 bsc 5.03 0.66 6 0 0.13 0.18 max min millimeters - 1.10 0.05 0.15 dim
max7462/MAX7463 single-channel video reconstruction filters and buffers 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. 8 _____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2005 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. boblet 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 .) soicn .eps package outline, .150" soic 1 1 21-0041 b rev. document control no. approval proprietary information title: top view front view max 0.010 0.069 0.019 0.157 0.010 inches 0.150 0.007 e c dim 0.014 0.004 b a1 min 0.053 a 0.19 3.80 4.00 0.25 millimeters 0.10 0.35 1.35 min 0.49 0.25 max 1.75 0.050 0.016 l 0.40 1.27 0.394 0.386 d d min dim d inches max 9.80 10.00 millimeters min max 16 ac 0.337 0.344 ab 8.75 8.55 14 0.189 0.197 aa 5.00 4.80 8 n ms012 n side view h 0.244 0.228 5.80 6.20 e 0.050 bsc 1.27 bsc c h e e b a1 a d 0 -8 l 1 variations:
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