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general description the MAX11508/max11509 integrated 3-channel video filters for high-definition (hd), progressive-scan (ps), standard-definition (sd), and bypass (bp) video include an output buffer with +6db gain and are ideal for digital video disc (dvd) players, set-top box (stb) receivers, high-definition television (hdtv), digital video recorders (dvrs), and similar devices. the MAX11508/max11509 video inputs feature a trans- parent clamp compatible with ac- and dc-coupled input signals and allow dac outputs to be directly cou- pled, eliminating the need for bulky coupling capaci- tors. the filter bandwidths are selectable to hd, ps, and sd. a bp mode is provided for 1080p and high- bandwidth rgb signals. selectable input bias circuitry on 2 filter channels offers simple connection to bipolar video signals such as c, pb, and pr. the MAX11508 filters provide -3db bandwidths of 9mhz (sd), 16mhz (ps), 33mhz (hd), and 60mhz (bp). the max11509 filters provide -3db bandwidths of 10mhz (sd), 17mhz (ps), 34mhz (hd), and 60mhz (bp). each channel includes an output buffer with +6db gain that provides a full 2v p-p video signal into a 150 ? video load. the buffers drive either ac- or dc-coupled loads and assure a blanking level of below 1v after the back- match resistor. the shutdown mode provided reduces device current to 1? (typ). the MAX11508 offers a flat passband and the max11509 features +0.8db peaking to compensate for dac rolloff. the MAX11508/max11509 operate from a 5v power supply and operate over the upper commer- cial (0? to +85?) temperature range. the parts are offered in the 14-pin tssop package. applications cable and satellite stb receivers hdtv dvd players personal video recorders dvrs video-on-demand hd recorders features ? three selectable 6th-order 9mhz/16mhz/33mhz (sd/ps/hd) filters ? bypass mode for high bandwidth signals ? transparent input clamp ? output buffers drive a standard 150 ? video load ? ?2kv hbm esd protection on outputs ? ac- or dc-coupled inputs ? ac- or dc-coupled outputs ? +0.8db peaking passband response (max11509) in sd, ps, and hd modes ? single +5v power supply ? lead-free, 14-pin tssop package MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer ________________________________________________________________ maxim integrated products 1 14 13 12 11 10 9 8 1 2 3 4 5 6 7 n.c. fsel1 y/g_out pb/b_out pb/b_in y/g_in fsel0 v cc top view MAX11508 max11509 pr/r_out shdn gnd n.c. bias pr/r_in tssop + pin configuration ordering information 19-4346; rev 0; 10/08 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. evaluation kit available part temp range pin-package MAX11508 uud+ 0? to +85? 14 tssop max11509 uud+ 0? to +85? 14 tssop typical operating circuit appears at end of data sheet. + denotes a lead-free/rohs-compliant package.
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = +5v, r load = 150 ? to gnd, c in = 0.1?, t a = 0? to +85?, all frequency responses are relative to 100khz, unless other- wise noted.) (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. v cc to gnd ..............................................................-0.3v 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?) 14-pin tssop (derate 10mw/? above +70?) .......796.8mw maximum current into any pin except v cc and gnd .....?0ma operating temperature range? ..........................0? to +85? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? junction temperature ......................................................+150? parameter symbol conditions min typ max units dc characteristics supply current i cc no load 24 35 ma supply voltage range v dd 4.75 5.00 5.25 v input voltage range v in referenced to gnd if dc-coupled 1.4 v bias = high 1 power-down current i pd bias = low 15 ? digital input high voltage v ih 2.0 v digital input low voltage v il 0.8 v standard-definition video MAX11508, t a = +25? 4.5 7.9 -1db bandwidth f 1db max11509, t a = +25? 5 8.6 mhz MAX11508 9.0 -3db bandwidth f 3db max11509 10 mhz stopband attenuation a sb f = 27mhz 35 48 db low-frequency gain a v no load 5.6 6.0 6.6 db differential gain dg all channels 0.7 % differential phase d all channels 0.7 degrees total harmonic distortion thd v out = 1.4v p-p , f = 1mhz, all channels -60 db signal-to-noise ratio snr 2v p-p signal to rms noise, f = 100khz to 4.2mhz 71 db group delay t g f = 4.5mhz 59 ns power-supply rejection ratio psrr dc, all channels 50 db
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer _______________________________________________________________________________________ 3 note 1: all devices are 100% production tested at t a = +25?. note 2: output ac-coupled with 220? into 150 ? to gnd. parameter symbol conditions min typ max units progressive-scan video MAX11508, t a = +25? 9 13.5 -1db bandwidth f 1db max11509, t a = +25? 10 14 mhz MAX11508 16 -3db bandwidth f 3db max11509 17 mhz stopband attenuation a sb f = 54mhz 44 db low-frequency gain a v 5.6 6.0 6.6 db total harmonic distortion thd v out = 1.4v p-p , f = 7mhz -55 db signal-to-noise ratio snr 2v p-p signal to rms noise, f = 100khz to 15mhz 66 db group delay t g f = 10mhz 47 ns high-definition video MAX11508, t a = +25? 21 30 -1db bandwidth f 1db max11509, t a = +25? 22 31 mhz MAX11508 33 -3db bandwidth f 3db max11509 34 mhz f = 37.125mhz 6.5 f = 44.25mhz 14.5 stopband attenuation a sb f = 74.25mhz 45 db low-frequency gain a v 5.4 6.0 6.6 db v out = 1.4v p-p , f = 10mhz -55 v out = 1.4v p-p , f = 15mhz -50 total harmonic distortion thd v out = 1.4v p-p , f = 22mhz -40 db signal-to-noise ratio snr 2v p-p signal to rms noise, f = 100khz to 30mhz 65 db group delay t g f = 20mhz 25 ns bypass video (note 2) -3db bandwidth f 3db 60 mhz low-frequency gain a v 5.4 6.0 6.6 db total harmonic distortion thd v out = 1.4v p-p , f = 22mhz -40 db signal-to-noise ratio snr 2v p-p signal to rms noise, f = 100khz to 30mhz 65 db electrical characteristics (continued) (v cc = +5v, r load = 150 ? to gnd, c in = 0.1?, t a = 0? to +85?, all frequency responses are relative to 100khz, unless other- wise noted.) (note 1)
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer 4 _______________________________________________________________________________________ MAX11508 sd frequency response MAX11508 toc01 frequency (mhz) response (db) 10 1 -50 -40 -30 -20 -10 0 10 -60 0.1 100 MAX11508 sd passband response MAX11508 toc02 frequency (mhz) response (db) 1 -1 1 3 5 7 -3 0.1 10 max11509 sd frequency response MAX11508 toc03 frequency (mhz) response (db) 10 1 -50 -40 -30 -20 -10 0 10 -60 0.1 100 max11509 sd passband response MAX11508 toc04 frequency (mhz) response (db) 1 -1 1 3 5 7 -3 0.1 10 MAX11508 ps frequency response MAX11508 toc05 frequency (mhz) response (db) 10 1 -50 -40 -30 -20 -10 0 10 -60 0.1 100 MAX11508 ps passband response MAX11508 toc06 frequency (mhz) response (db) 1 -1 1 3 5 7 -3 0.1 100 10 max11509 ps frequency response MAX11508 toc07 frequency (mhz) response (db) 10 1 -50 -40 -30 -20 -10 0 10 -60 0.1 100 max11509 ps passband response MAX11508 toc08 frequency (mhz) response (db) 110 -1 1 3 5 7 -3 0.1 100 MAX11508 hd frequency response MAX11508 toc09 frequency (mhz) response (db) 10 1 -50 -40 -30 -20 -10 0 10 -60 0.1 100 typical operating characteristics (v cc = 5v, r l = 150 ? to gnd, output dc-coupled, t a = +25?, unless otherwise noted.)
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer _______________________________________________________________________________________ 5 MAX11508 hd passband response MAX11508 toc10 frequency (mhz) response (db) 1 -1 1 3 5 7 -3 0.1 100 10 max11509 hd frequency response MAX11508 toc11 frequency (mhz) response (db) 10 1 -50 -40 -30 -20 -10 0 10 -60 0.1 100 max11509 hd passband response MAX11508 toc12 frequency (mhz) response (db) 1 -1 1 3 5 7 -3 0.1 100 10 MAX11508 bp frequency response MAX11508 toc13 frequency (mhz) response (db) 10 1 -50 -40 -30 -20 -10 0 10 -60 0.1 100 MAX11508 bp passband response MAX11508 toc14 frequency (mhz) response (db) 1 -1 1 3 5 7 -3 0.1 100 10 max11509 bp frequency response MAX11508 toc15 frequency (mhz) response (db) 10 1 -50 -40 -30 -20 -10 0 10 -60 0.1 100 max11509 bp passband response MAX11508 toc16 frequency (mhz) response (db) 1 -1 1 3 5 7 -3 0.1 100 10 MAX11508 sd group delay vs. frequency MAX11508 toc17 frequency (mhz) delay (ns) 10 1 0 20 40 60 80 100 120 -20 0.1 100 max11509 sd group delay vs. frequency MAX11508 toc18 frequency (mhz) delay (ns) 10 1 0 20 40 60 80 100 120 -20 0.1 100 typical operating characteristics (continued) (v cc = 5v, r l = 150 ? to gnd, output dc-coupled, t a = +25?, unless otherwise noted.)
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer 6 _______________________________________________________________________________________ MAX11508 ps group delay vs. frequency MAX11508 toc19 frequency (mhz) delay (ns) 10 1 0 20 40 60 80 -20 0.1 100 max11509 ps group delay vs. frequency MAX11508 toc20 frequency (mhz) delay (ns) 10 1 0 20 40 60 80 -20 0.1 100 MAX11508 hd group delay vs. frequency MAX11508 toc21 frequency (mhz) delay (ns) 10 1 -20 0 20 40 -40 0.1 100 max11509 hd group delay vs. frequency MAX11508 toc22 frequency (mhz) delay (ns) 10 1 -20 0 20 40 -40 0.1 100 MAX11508 bp group delay vs. frequency MAX11508 toc23 frequency (mhz) delay (ns) 10 1 -20 0 20 40 -40 0.1 100 max11509 bp group delay vs. frequency MAX11508 toc24 frequency (mhz) delay (ns) 10 1 -20 0 20 40 -40 0.1 100 MAX11508 sd differential gain, ntsc MAX11508 toc25 step differential gain (%) 56 4 3 2 -0.2 -0.4 -0.6 -0.8 0.2 0.6 0 0.4 0.8 1.0 -1.0 17 MAX11508 sd differential phase, ntsc MAX11508 toc26 step differential phase (deg) 56 4 3 2 -0.2 -0.4 -0.6 -0.8 0.2 0.6 0 0.4 0.8 1.0 -1.0 17 max11509 sd differential gain, ntsc MAX11508 toc27 step differential gain (%) 56 4 3 2 -0.2 -0.4 -0.6 -0.8 0.2 0.6 0 0.4 0.8 1.0 -1.0 17 typical operating characteristics (continued) (v cc = 5v, r l = 150 ? to gnd, output dc-coupled, t a = +25?, unless otherwise noted.)
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer _______________________________________________________________________________________ 7 pin description pin name function 1v cc power-supply input 2 fsel0 frequency-select input. lsb for bandwidth selection. 3 y/g_in video input channel 1 4 pb/b_in video input channel 2 5 pr/r_in video input channel 3 6 bias bias control digital input. enables voltage bias for the pb/b and pr/r channels. force bias low to enable voltage bias and disable the input clamps. force bias high to disable voltage bias and enable the input clamps. 7, 14 n.c. no connection. not internally connected. 8 gnd ground 9 shdn shutdown digital input. shdn places the device into a powered-down state. force shdn low to enable shutdown. force shdn high for normal operation. 10 pr/r_out video output channel 3 11 pb/b_out video output channel 2 12 y/g_out video output channel 1 13 fsel1 frequency select input. msb for bandwidth selection. typical operating characteristics (continued) (v cc = 5v, r l = 150 ? to gnd, output dc-coupled, t a = +25?, unless otherwise noted.) max11509 sd differential phase, ntsc MAX11508 toc28 step differential phase (deg) 56 4 3 2 -0.2 -0.4 -0.6 -0.8 0.2 0.6 0 0.4 0.8 1.0 -1.0 17 MAX11508 sd 2t response MAX11508 toc29 200ns/div ch1 out ch1: input, 200mv/div ch2: output after backmatch resistor, 200mv/div in ch2 max11509 sd 2t response MAX11508 toc30 200ns/div ch1 out in ch2 ch1: input, 200mv/div ch2: output after backmatch resistor, 200mv/div
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer 8 _______________________________________________________________________________________ detailed description the MAX11508/max11509 integrated filters offer 3 channels of sd, ps, or hd video, and include a bypass mode useful for high-bandwidth 1080p and rgb video signals. the MAX11508 6th-order lowpass filters provide -3db bandwidths of 9mhz (sd), 16mhz (ps), 33mhz (hd), and 60mhz (bp). the max11509 6th-order low- pass filters provide -3db bandwidths of 10mhz (sd), 17mhz (ps), 34mhz (hd), and 60mhz (bp). two control inputs, fsel0 and fsel1, select the filter mode for all filters (table 1). input bias circuitry on 2 fil- ter channels can be enabled through the bias input to offer simple connection to bipolar video signals such as c, pb, and pr. shutdown mode reduces device current to 1? (typ) and is enabled by forcing shdn low. figure 1 shows a simplified block diagram of the MAX11508/max11509. the MAX11508 provides a flat passband response and the max11509 provides a +0.8db high-frequency boost at 5mhz (sd), 8.5mhz (ps), and 20mhz (hd) to help with system rolloff. no frequency boost is included in bypass mode. typical voltage waveforms are shown in figures 2 and 3. inputs transparent clamps all inputs feature transparent clamps to allow either ac- or dc-coupling of the inputs. the clamp remains inac- tive while the input signal is above ground, offering true dc input coupling. when the signal goes below ground, as is the case when it is ac-coupled, the clamp sets the sync tip close to the ground level. input coupling the choice of ac- or dc-coupling the input depends on the video source. many dacs have a current output and are terminated to ground with a resistor; such sig- nals 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 MAX11508/ max11509, such as scart or v cc -terminated dac outputs. a bias network within 2 channels of the MAX11508/max11509, for use with bipolar signals, connects to the input node when bias is forced low. figures 4 and 5 show how the bias network operates. dc-coupled inputs when the input is dc-coupled, the voltage must remain above zero, but not to exceed 1.4v (typ). ac-coupling and bias when 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 cvbs, y, r, g, or b, with sync pulses (figure 4). force bias high when coupling unipolar signals. for bipolar signals, such as pb and pr, a bias network is provided within the MAX11508/max11509 for inputs pb/b_in and pr/r_in. force bias low to connect the bias network to these inputs (figure 5). the internal network biases ac-coupled inputs to a fixed dc voltage, typically 0.59v, to ensure that the transparent clamp remains off. table 1. frequency-selection truth table control inputs filter -3db frequency (mhz) fsel1 fsel0 MAX11508 max11509 operating mode 0 0 9 10 standard definition 0 1 16 17 progressive scan 1 0 33 34 high definition 1 1 60 60 bypass shdn fsel0 fsel1 bias y/g_in pb/b_in pr/r_in transparent clamp 9mhz/16mhz/33mhz/60mhz (10mhz/17mhz/34mhz/60mhz) 9mhz/16mhz/33mhz/60mhz (10mhz/17mhz/34mhz/60mhz) 9mhz/16mhz/33mhz/60mhz (10mhz/17mhz/34mhz/60mhz) y/g_out pb/b_out pr/r_out v cc gnd bias network MAX11508 max11509 6db transparent clamp 6db transparent clamp 6db figure 1. block diagram
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer _______________________________________________________________________________________ 9 input signal 0.3v 1.0v 0.0v output signal 1.15v 2.55v 0.55v input output sd sync signal not shown for clarity. MAX11508 max11509 figure 2. typical ac-coupled signal input output MAX11508 max11509 output signal 1.19v 2.59v 0.59v input signal 0.32v 1.02v 0.02v 0.00v sd sync signal not shown for clarity. figure 3. typical dc-coupled signal
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer 10 ______________________________________________________________________________________ pr/r_in bias 0.1 f v cc v cc encoder pb/b_in 0.59v 0.59v MAX11508 max11509 dac 0.1 f dac figure 4. simple ac-coupling and bias control for unipolar signals (cvbs, y, r, g, b) pr/r_in bias 0.1 f v cc encoder pb/b_in 0.59v 0.59v MAX11508 max11509 dac 0.1 f dac figure 5. ac-coupling and bias control for bipolar signals (c, pb, pr)
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer ______________________________________________________________________________________ 11 filters the MAX11508 filter characteristic provides excellent time-domain response with low overshoot and guaran- tees minimal attenuation in the passband. the max11509 filters offer a small gain peaking response to counter system rolloff. select filter frequency with inputs fsel0 and fsel1, as shown in table 1. standard-definition (sd) filters the MAX11508 sd filters have a 9mhz (typ) -3db fre- quency, while the max11509 sd filters offer a 10mhz (typ) -3db frequency and a +0.8db high-frequency boost at 5mhz (typ). both devices have a stopband attenuation of +48db (typ) at 27mhz. progressive-scan (ps) filters the MAX11508 ps filters have a 16mhz (typ) -3db fre- quency, while the max11509 ps filters offer a 17mhz (typ) -3db frequency and a +0.8db high-frequency boost at 8.5mhz (typ). both devices have a stopband attenuation of +44db (typ) at 54mhz. high-definition (hd) filters the MAX11508 hd filters have a 33mhz (typ) -3db fre- quency, while the max11509 hd filters offer a 34mhz (typ) -3db frequency and a +0.8db high-frequency boost at 20mhz (typ). both devices have a stopband attenuation of +45db (typ) at 74.25mhz. bypassing the filters the MAX11508/max11509 filter bypass circuitry offers a 60mhz (typ) -3db frequency. bypassed filters offer no gain peaking. output buffer the MAX11508/max11509 feature output buffers with +6db gain that drive a standard 150 ? video load at 2v p-p . a typical load consists of a 75 ? backmatch resistor, an optional 220? or larger coupling capacitor, and a 75 ? termination resistor. an offset of 550mv is added at the output. the offset ensures that the blanking level on the output is less than 1v after the backmatch resistor, thus meeting digi- tal tv specifications allowing the devices to drive video loads directly without using costly ac-coupling capaci- tors. the basic output voltage equation of all filters is: v out = (2 x v in ) + 0.55v typical voltage waveforms are shown in figures 2 and 3. shutdown forcing digital input shdn low places the MAX11508/ max11509 into low-power shutdown mode. in shut- down, the device consumes only 1? (typ), and the outputs are internally connected to gnd through 1.58k ? resistors. in shutdown, the input clamps are dis- abled and the inputs are internally connected to gnd through 350k ? resistors. when shutdown is forced low while bias is low, the bias network remains active, but the bias voltage changes from its nominal 0.59v to 0.475v (typ). applications information output considerations dc- or ac-couple the MAX11508/max11509 outputs. these devices, with +6db gain, are typically connected to a 75 ? series backmatch resistor followed by a video cable. choose an ac-coupling capacitor value that ensures that the lowest frequency content in the video signal is passed and the field-time distortion is kept within desired limits when using an ac connection. the selection of this value is a function of the input imped- ance, and more importantly, the input leakage of the circuit being driven. common industry practice is to use a 220? or larger capacitor. the MAX11508/max11509 outputs are fully protected against short circuits to ground. the short-circuit pro- tection circuitry limits the output current to 75ma (typ) per output. shorting more than one output to ground simultaneously may exceed the maximum package power dissipation. pcb layout recommendations connect the power and ground traces to large copper areas to enhance power dissipation. bypass v cc to gnd with 0.1? and 1.0? capacitors. place the 0.1? capacitor closest to v cc . use surface-mount capaci- tors for their low inductance. place traces carrying video signals appropriately to avoid mutual coupling. when inputs are ac-coupled, place the capacitors as close as possible to the device and keep traces short to minimize parasitic capacitance and inductance. refer to the MAX11508/max11509 evaluation kit data sheet for pcb layout. chip information process: bicmos
MAX11508/max11509 low-cost, 3-channel, hd/ps/sd/bp video filters with buffer 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 2008 maxim integrated products is a registered trademark of maxim integrated products, inc. 75 ? 75 ? 75 ? fsel0 fsel1 bias y/g_in pb/b_in pr/r_in v cc 1.0 f +5v 220 f 75 ? video cable ac-coupling capacitors are optional. y/g_out pb/b_out pr/r_out gnd shdn 0.1 f MAX11508 max11509 dac 75 ? dac 75 ? dac 75 ? 75 ? 220 f 75 ? 75 ? 220 f typical operating circuit package information for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . package type package code document no. 14 tssop u14+1 21-0066

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