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general description the MAX9657 is a small, low-power, quad video ampli- fier with input sync-tip clamps. it features a bandwidth of 15mhz, making it suitable for not only standard-defi- nition video signals, but also video graphics array (vga) signals with a 640 x 480 resolution at up to 85hz refresh rate. the max9658 is a quad video amplifier with integrated lowpass filters and input sync-tip clamps. the lowpass filters typically have ?db passband flatness out to 9.5mhz and 47db attenuation at 27mhz. specially suit- ed for composite video signals, the max9658 is ideal for performing anti-alias filtering at the inputs of a digital video recorder or for performing reconstruction filtering at the outputs of a scart set-top box. both devices require that the incoming video signals be ac-coupled to the inputs. the input sync-tip clamps set the internal dc level of the video signals. the amplifiers have 2v/v gain, and the outputs can be dc-coupled to a 75 load, which is the equivalent of two video loads, or ac-coupled to a 150 load. both the MAX9657/max9658 feature a low-power shut- down mode, in which supply current is reduced to 35?. the MAX9657/max9658 operate from a single 2.7v to 3.6v supply, are specified over the -40? to +125? automotive temperature range, and are offered in a small, 16-pin qsop package. applications set-top boxes digital video recorders features ? quad channel ? 9.5mhz, ?db passband (max9658) ? 47db attenuation at 27mhz (max9658) ? fixed gain of 2v/v ? low power: 21ma ? 2.7v to 3.6v single-supply operation MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps ________________________________________________________________ maxim integrated products 1 19-4453; rev 0; 2/09 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. typical application circuits and pin configuration appear at end of data sheet. unknown bias 300mv a v = 2v/v lpf* clampref out0 in0 a v = 2v/v lpf* clampref out1 in1 a v = 2v/v lpf* clampref out2 in2 *lowpass filter in max9658 only. a v = 2v/v lpf* clampref out3 in3 shdn MAX9657/max9658 gnd functional diagram ordering information part pin-package standard-definition video filter MAX9657 aee+ 16 qsop no max9658 aee+ 16 qsop yes note: all devices are specified over the -40? to +125? oper- ating temperature range. +denotes a lead(pb)-free/rohs-compliant package.
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v dd = 3.3v, v gnd = 0v, v shdn = v dd , r l = 150 to gnd, 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. supply voltage v dd to gnd ..........................................................-0.3v to +4v input pins, shdn .....................................(gnd - 0.3v) to +4v duration of output short circuit to v dd or gnd ........continuous continuous input current input pins......................................................................?0ma continuous power dissipation (t a = +70?) 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 power-supply rejection test 2.7 3.3 3.6 v quiescent supply current i dd no load 21 45 ma shutdown supply current i shdn shdn = gnd 35 70 ? sync-tip clamp level v clp 0.23 0.3 0.39 v 2.7v v dd 3.6v 1.05 input voltage range guaranteed by output- voltage swing 3.0v v dd 3.6v 1.2 v p-p sync crush sync-tip clamp; percentage reduction in sync pulse (0.3v p-p ); guaranteed by input clamping current measurement 2% input clamping current 12a maximum input source resistance 300 v dd = 2.7v, 0v v in 1.05v 1.96 2 2.04 dc voltage gain (note 2) a v r l = 150 to gnd (note 2) v dd = 3v, 0v v in 1.2v 1.96 2 2.04 v/v dc gain mismatch guaranteed by dc voltage gain -2 +2 % output level measured at v out , c in_ = 0.1? to gnd 0.218 0.3 0.39 v measured at output, v dd = 2.7v, v in = v clp to (v clp +1.05v), r l = 150 to -0.2v 2.1 measured at output, v dd = 2.7v, v in = v clp to (v clp +1.05v), r l = 150 to v dd /2 2.1 measured at output, v dd = 3.0v, v in = v clp to (v clp +1.2v), r l = 150 to -0.2v 2.4 measured at output, v dd = 3.0v, v in = v clp to (v clp +1.2v), r l = 150 to v dd /2 2.4 output-voltage swing measured at output, v dd = 3.135v, v in = v clp to (v clp +1.05v), r l = 75 to -0.2v 2.1 v p-p
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps _______________________________________________________________________________________ 3 parameter symbol conditions min typ max units short to gnd (sourcing) 140 output short-circuit current short to v dd (sinking) 70 ma output resistance r out v out = 1.5v, -10ma i load +10ma 0.2 2.7v v dd 3.6v 48 64 power-supply rejection ratio f = 100khz, 100mv p-p 20 db small-signal bandwidth v out = 100mv p-p (MAX9657 only) 27 mhz large-signal bandwidth v out = 2v p-p (MAX9657 only) 15 mhz slew rate MAX9657 only 65 v/? settling time settled to within 0.1% of final value (MAX9657 only) 75 ns v out = 2v p-p , reference frequency is 100khz ?db passband flatness (max9658 only) 9.5 mhz f = 5.5mhz 0.1 f = 9.5mhz -1 f = 10mhz -3 standard-definition reconstruction filter v out = 2v p-p , reference frequency is 100khz (max9658 only) f = 27mhz -47 db differential gain dg 5-step modulated staircase of 129mv step size and 286mv peak-to-peak subcarrier amplitude, f = 4.43mhz 0.4 % differential phase dp 5-step modulated staircase of 129mv step size and 286mv peak-to-peak subcarrier amplitude, f = 4.43mhz 0.45 deg group-delay distortion 100khz f 5mhz, outputs are 2v p-p 9ns peak signal to rms noise 100khz f 5mhz 71 db 2t pulse response 2t = 200ns 0.2 k% 2t bar response 2t = 200ns; bar time is 18?; the beginning 2.5%, and the ending 2.5% of the bar time is ignored 0.2 k% 2t pulse-to-bar k rating 2t = 200ns; bar time is 18?; the beginning 2.5%, and the ending 2.5% of the bar time is ignored 0.3 k% nonlinearity 5-step staircase 0.1 % output impedance f = 5.5mhz 8.07 f = 15khz -82 all-hostile crosstalk f = 4.43mhz -78 db output-to-input crosstalk f = 30mhz -68 db electrical characteristics (continued) (v dd = 3.3v, v gnd = 0v, v shdn = v dd , r l = 150 to gnd, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1)
small-signal gain vs. frequency MAX9657 toc01 frequency (hz) gain (db) 10m 1m -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 -50 100k 100m v in = 50mv p-p note: gain is normalized to 0db small-signal gain flatness vs. frequency MAX9657 toc02 frequency (hz) gain (db) 10m 1m -6 -5 -4 -3 -2 -1 0 1 2 3 -7 100k 100m v in = 50mv p-p note: gain is normalized to 0db large-signal gain vs. frequency MAX9657 toc03 frequency (hz) gain (db) 10m 1m -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 -50 100k 100m v in = 1v p-p note: gain is normalized to 0db large-signal gain flatness vs. frequency MAX9657 toc04 frequency (hz) gain (db) 10m 1m -6 -5 -4 -3 -2 -1 0 1 2 3 -7 100k 100m v in = 1v p-p note: gain is normalized to 0db video crosstalk vs. frequency MAX9657 toc05 frequency (hz) gain (db) 10m 1m -100 -80 -60 -40 -20 0 -120 100k 100m all-hostile 1 adjacent channel 2 adjacent channels v in = 1v p-p note: gain is normalized to 0db video group delay distortion vs. frequency MAX9657 toc06 frequency (hz) group delay (ns) 10m 1m 5 10 15 20 25 30 35 40 45 50 0 100k 100m v in = 1v p-p note: gain is normalized to 0db typical operating characteristics (MAX9657) (v dd = 3.3v, v gnd = 0, v shdn = v dd , r l = 150 to gnd, t a = +25?.) MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps 4 _______________________________________________________________________________________ electrical characteristics (continued) (v dd = 3.3v, v gnd = 0v, v shdn = v dd , 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 logic signals ( shdn ) 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 in 10 ? note 1: all devices are 100% production tested at t a = +25?. specifications over temperature limits are guaranteed by design. note 2: voltage gain (a v ) is a two-point measurement in which the output-voltage swing is divided by the input-voltage swing.
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps _______________________________________________________________________________________ 5 video psrr vs. frequency MAX9657 toc07 frequency (hz) psrr (db) 10m 1m -70 -60 -50 -40 -30 -20 -10 0 -80 100k 100m v dd = 3.3v + 100mv p-p voltage gain vs. temperature MAX9657 toc08 temperature ( c) voltage gain (v/v) 100 75 -25 0 25 50 1.97 1.98 1.99 2.00 2.01 2.02 2.03 2.04 1.96 -50 125 differential gain and phase MAX9657 toc09 differential phase (deg) 1 03 245 0.6 0.8 0.4 0.2 0 -0.2 -0.4 differential gain (%) 0.05 0.10 0 -0.05 -0.10 -0.15 -0.20 1 03 245 f = 3.58mhz f = 3.58mhz typical operating characteristics (MAX9657) (continued) (v dd = 3.3v, v gnd = 0, v shdn = v dd , r l = 150 to gnd, t a = +25?.) differential gain and phase MAX9657 toc10 differential phase (deg) 1 03 245 0.6 0.8 0.4 0.2 0 -0.2 -0.4 differential gain (%) 0.05 0.10 0 -0.05 -0.10 -0.15 -0.25 1 03 245 f = 4.43mhz f = 4.43mhz 100ns/div 2t response in 200mv/div MAX9657 toc11 out 400mv/div 400ns/div 12.5t response in 200mv/div MAX9657 toc12 out 400mv/div 10 s/div ntc-7 video test signal in 500mv/div MAX9657 toc13 out 1v/div 2ms/div field square wave in 500mv/div MAX9657 toc14 out 1v/div pulse response MAX9657 toc15 time (100ns/div) input (700mv/div) output (700mv/div)
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps 6 _______________________________________________________________________________________ quiescent supply current vs. temperature MAX9657 toc19 temperature ( c) quiescent supply current (ma) 100 75 -25 0 25 50 18.5 19.0 19.5 20.0 20.5 21.0 21.5 22.0 18.0 -50 125 video sync-tip clamp voltage vs. temperature MAX9657 toc16 temperature ( c) sync-tip clamp voltage (v) 100 75 25 50 0 -25 0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.28 -50 125 video sync-tip clamp current vs. temperature MAX9657 toc17 temperature ( c) sync-tip clamp current ( a) 100 75 -25 0 25 50 0.92 0.94 0.96 0.98 1.00 1.02 1.04 1.06 0.90 -50 125 sync-tip clamp current vs. input voltage MAX9657 toc18 input voltage (v) sync-tip clamp current ( a) 0.4 0.2 0 100 200 300 400 500 -100 0 1.0 0.8 0.6 1.4 1.2 1.6 typical operating characteristics (MAX9657) (continued) (v dd = 3.3v, v gnd = 0, v shdn = v dd , r l = 150 to gnd, t a = +25?.)
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps _______________________________________________________________________________________ 7 small-signal gain flatness vs. frequency MAX9657 toc21 frequency (hz) gain (db) 10m 1m -6 -5 -4 -3 -2 -1 0 1 2 3 -7 100k 100m v in = 50mv p-p note: gain is normalized to 0db small-signal gain vs. frequency MAX9657 toc20 frequency (hz) gain (db) 10m 1m -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 -50 100k 100m v in = 50mv p-p note: gain is normalized to 0db large-signal gain vs. frequency MAX9657 toc22 frequency (hz) gain (db) 10m 1m -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 -50 100k 100m v in = 1v p-p note: gain is normalized to 0db large-signal gain flatness vs. frequency MAX9657 toc23 frequency (hz) gain (db) 10m 1m -6 -5 -4 -3 -2 -1 0 1 2 3 -7 100k 100m v in = 1v p-p note: gain is normalized to 0db video crosstalk vs. frequency MAX9657 toc24 frequency (hz) gain (db) 10m 1m -100 -80 -60 -40 -20 0 -120 100k 100m all-hostile 1 adjacent channel 2 adjacent channels v in = 1v p-p note: gain is normalized to 0db video group delay distortion vs. frequency MAX9657 toc25 frequency (hz) group delay (ns) 10m 1m 20 30 40 50 60 80 10 70 90 100 110 120 0 100k 100m v in = 1v p-p note: gain is normalized to 0db video psrr vs. frequency MAX9657 toc26 frequency (hz) psrr (db) 10m 1m -70 -60 -50 -40 -30 -20 -10 0 -80 100k 100m v dd = 3.3v + 100mv p-p voltage gain vs. temperature MAX9657 toc27 temperature ( c) voltage gain (v/v) 100 75 -25 0 25 50 1.97 1.98 1.99 2.00 2.01 2.02 2.03 2.04 1.96 -50 125 differential gain and phase MAX9657 toc28 differential phase (deg) 1 03 245 0.6 0.8 0.4 0.2 0 -0.2 -0.4 differential gain (%) 0 0.1 -0.1 -0.2 -0.3 -0.4 -0.5 1 03 245 f = 3.58mhz f = 3.58mhz typical operating characteristics (max9658) (continued) (v dd = 3.3v, v gnd = 0, v shdn = v dd , r l = 150 to gnd, t a = +25?.)
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps 8 _______________________________________________________________________________________ differential gain and phase MAX9657 toc29 differential phase (deg) 1 03 245 0.6 0.8 0.4 0.2 0 -0.2 -0.4 differential gain (%) 0 0.1 -0.1 -0.2 -0.3 -0.4 -0.5 1 03 245 f = 4.43mhz f = 4.43mhz 100ns/div 2t response in 200mv/div MAX9657 toc30 out 400mv/div 400ns/div 12.5t response in 200mv/div MAX9657 toc31 out 400mv/div 10 s/div ntc-7 video test signal in 500mv/div MAX9657 toc32 out 1v/div 2ms/div field square wave in 500mv/div MAX9657 toc33 out 1v/div video sync-tip clamp voltage vs. temperature MAX9657 toc34 temperature ( c) sync-tip clamp voltage (v) 100 75 25 50 0 -25 0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.28 -50 125 typical operating characteristics (max9658) (continued) (v dd = 3.3v, v gnd = 0, v shdn = v dd , r l = 150 to gnd, t a = +25?.)
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps _______________________________________________________________________________________ 9 video sync-tip clamp current vs. temperature MAX9657 toc35 temperature ( c) sync-tip clamp current ( a) 100 75 -25 0 25 50 0.92 0.94 0.96 0.98 1.00 1.02 1.04 1.06 0.90 -50 125 sync-tip clamp current vs. input voltage MAX9657 toc36 input voltage (v) sync-tip clamp current ( a) 0.4 0.2 0 100 200 300 400 500 -100 0 1.0 0.8 0.6 1.4 1.2 1.6 quiescent supply current vs. temperature MAX9657 toc37 temperature ( c) quiescent supply current (ma) 100 75 -25 0 25 50 18.5 19.0 19.5 20.0 20.5 21.0 21.5 22.0 18.0 -50 125 typical operating characteristics (max9658) (continued) (v dd = 3.3v, v gnd = 0, v shdn = v dd , r l = 150 to gnd, t a = +25?.) pin description pin name function 1 in0 video input channel 0 2 in1 video input channel 1 3 in2 video input channel 2 4 in3 video input channel 3 5?, 15 n.c. no connection. not internally connected. 9 gnd ground 10 shdn active-low shutdown logic input. connect to gnd to place device in shutdown. connect to v dd for normal operation. 11 out3 video output channel 3 12 out2 video output channel 2 13 out1 video output channel 1 14 out0 video output channel 0 16 v dd positive power supply. bypass to gnd with a 0.1? capacitor.
MAX9657/max9658 detailed description the MAX9657 consists of input sync-tip clamps and gain of 2v/v output amplifiers capable of driving stan- dard 150 loads to ground. it can be used to buffer video signals, for example, before a crosspoint matrix. the max9658 filters and amplifies video signals. it is very similar to the MAX9657 except that it also has inte- grated lowpass filters. this device can be used to pro- vide the anti-alias filtering before the video decoders of a digital video recorder, or it can be used to do the reconstruction filtering after a video dac that refer- ences output signals to the positive supply. input the MAX9657/max9658 feature sync-tip clamps at the input that accept video signals with sync pulses. composite video with blanking and sync (cvbs) is an example of a video signal with sync pulses. the sync- tip voltage is internally set to 300mv. in shutdown mode, the inputs to the MAX9657/ max9658 do not distort the video signal in case the video source is driving video signals to another video circuit such as a video multiplexer. the inputs in shut- down mode are biased at v dd /3, which is sufficiently above ground such that the esd diodes never forward bias as the video signal changes. the input resistance is 220k , which presents negligible loading on the video current dac. video filter (max9658 only) the max9658 filters feature ?db passband out to 9.5mhz and 47db attenuation at 27mhz, making the fil- ter suitable for standard-definition video signals from all sources (e.g., broadcast and dvd). broadcast video signals are channel limited: ntsc signals have 4.2mhz bandwidth and pal signals have 5mhz bandwidth. video signals from a dvd player, however, are not channel limited, so the bandwidth of dvd video signals can approach 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 mod- ern video systems oversample by two times, clocking the video current dac at 27mhz. 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 approxi- mately 300mv of headroom from either supply rail. the devices have an internal level-shift circuit that positions the sync tip at approximately 300mv at the output. 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 the devices draw approximately 35? of supply cur- rent when shdn is low. in shutdown mode, the amplifi- er outputs become high impedance. applications information ac-coupling the outputs the outputs can be ac-coupled since the output stage can source and sink current as shown in figure 1. 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 frequency of 4.8hz or below. the frame rate of pal systems is 25hz, the frame rate of ntsc systems is 30hz, and the frame rate of vga is usually 60hz or higher. the corner frequency should be well below the frame rate. power consumption the quiescent power consumption and average power consumption of the MAX9657/max9658 are very low because of the 3.3v operation and low-power circuit design. quiescent power consumption is defined when the MAX9657/max9658 are operating without loads and without any video signals. average power consumption represents the normal power consumption when the devices drive real video signals into real video loads. it is measured when the MAX9657/max9658 drive a 150 load to ground with a 50% flat field, which serves as a proxy for a real video signal. table 1 shows the quiescent and average power con- sumption of the MAX9657/max9658. power-supply bypassing and ground the MAX9657/max9658 operate 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 as possible to the device. quad video (filter) amplifiers with input sync-tip clamps 10 ______________________________________________________________________________________
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps ______________________________________________________________________________________ 11 a v = 2v/v lpf* 0.1 f graphics processing unit or mpeg decoder clampref a v = 2v/v lpf* clampref a v = 2v/v lpf* clampref a v = 2v/v lpf* clampref MAX9657/ max9658 0.1 f 0.1 f 0.1 f 75 220 f 75 75 75 75 75 75 out0 out1 out2 out3 in0 in1 in2 in3 220 f 220 f 220 f *lowpass filter in max9658 only. y c cvbs1 cvbs2 gnd v dd 0.1 f +3.3v dac dac dac luma chroma cvbs figure 1. ac-coupled outputs measurement power consumption (mw) conditions quiescent power consumption 69 no load. average power consumption 200 150 to ground on each output. 50% flat field signal on each input. table 1. quiescent and average power consumption for MAX9657/max9658
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps 12 ______________________________________________________________________________________ a v = 2v/v 0.1 f clampref a v = 2v/v clampref a v = 2v/v clampref a v = 2v/v clampref MAX9657 gnd 0.1 f 0.1 f 0.1 f 0.1 f 0.1 f 0.1 f 0.1 f 0.1 f v dd +3.3v 75 75 75 75 75 75 75 75 75 75 75 75 note: four MAX9657s are required before the 16x16 crosspoint. out0 out1 out2 out3 in0 in1 in2 in3 shdn 16x16 crosspoint cvbs inputs typical application circuits
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps ______________________________________________________________________________________ 13 a v = 2v/v lpf 0.1 f clampref a v = 2v/v lpf clampref a v = 2v/v lpf clampref a v = 2v/v lpf clampref max9658 gnd 0.1 f 0.1 f 0.1 f 0.1 f 0.1 f 0.1 f 0.1 f 0.1 f v dd +3.3v 75 75 75 75 75 75 75 75 75 75 75 75 out0 out1 out2 out3 in0 in1 in2 in3 shdn quadruple video decoder cvbs inputs typical application circuits (continued)
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps 14 ______________________________________________________________________________________ 16 v dd 1 in0 15 n.c. 2 in1 14 out0 3 in2 13 out1 4 in3 12 out2 5 n.c. 11 out3 6 n.c. 10 shdn 7 n.c. 9 gnd 8 n.c. MAX9657 max9658 qsop + pin configuration chip information process: bicmos
MAX9657/max9658 quad video (filter) amplifiers with input sync-tip clamps 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 ____________________ 15 2009 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. package type package code document no. 16 qsop e16-4 21-0055 package information for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . qsop.eps

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