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general description the max4450 single and max4451 dual op amps are unity-gain-stable devices that combine high-speed per- formance with rail-to-rail outputs. both devices operate from a +4.5v to +11v single supply or from ?.25v to ?.5v dual supplies. the common-mode input voltage range extends beyond the negative power-supply rail (ground in single-supply applications). the max4450/max4451 require only 6.5ma of quies- cent supply current per op amp while achieving a 210mhz -3db bandwidth and a 485v/? slew rate. both devices are an excellent solution in low-power/low- voltage systems that require wide bandwidth, such as video, communications, and instrumentation. the max4450 is available in the ultra-small 5-pin sc70 package, while the max4451 is available in space- saving 8-pin sot23 and so packages. applications set-top boxes surveillance video systems battery-powered instruments video line driver analog-to-digital converter interface ccd imaging systems video routing and switching systems digital cameras features ? ultra-small sc705 and sot23 packages ? low cost ? high speed 210mhz -3db bandwidth 55mhz 0.1db gain flatness 485v/s slew rate ? single +4.5v to +11v operation ? rail-to-rail outputs ? input common-mode range extends beyond v ee ? low differential gain/phase: 0.02%/0.08 ? low distortion at 5mhz -65dbc sfdr -63db total harmonic distortion max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs v ee in- in+ 1 5 v cc out max4450 sc70/sot23 top view 2 3 4 pin configurations 500 500 75 75 in out video line driver z o = 75 max4450 typical operating circuit 19-1522; rev 4; 11/09 ordering information pin configurations continued at end of data sheet. part max4450 exk-t max4450euk-t max4451 eka-t max4451esa -40? to +85? -40? to +85? -40? to +85? -40? to +85? temp range pin- package 5 sc70 5 sot23 8 sot23 8 so top mark aaa adkp aaaa ________________________________________________________________ maxim integrated products 1 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.
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristics (v cc = +5v, v ee = 0v, r l = to v cc /2, v out = v cc /2, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) supply voltage (v cc to v ee )................................................+12v in_-, in_+, out_..............................(v ee - 0.3v) to (v cc + 0.3v) output short-circuit current to v cc or v ee ......................150ma continuous power dissipation (t a = +70?) 5-pin sc70-5 (derate 2.5mw/? above +70?) ..........200mw 5-pin sot23-5 (derate 7.1mw/? above +70?) ........571mw 8-pin sot23-8 (derate 5.26mw/? above +70?) ......421mw 8-pin so (derate 5.9mw/? above +70?) .................471mw operating temperature range ...........................-40? to +85? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratin gs only, and functional operation of the device at these or at any other conditions beyond those indicated in the operational sections of the specifica tions is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. parameter symbol conditions min typ max units v v ee -v cc 0.20 2.25 guaranteed by cmrr test v cm input common-mode voltage range input offset voltage (note 2) input offset voltage matching v os 426 1.0 mv mv ?/? 8 tc vos input offset voltage temperature coefficient input bias current input offset current i b i os (note 2) (note 2) 6.5 20 0.5 4 ? ? k 70 differential mode (-1v v in +1v) r in input resistance common mode (-0.2v v cm +2.75v) 3 m db 70 95 50 60 48 58 57 db v 0.05 0.20 0.05 0.15 0.30 0.50 0.25 0.80 0.5 0.80 0.5 1.75 45 70 ma ma 8 ?20 46 62 db v 54 69 4.5 11.0 6.5 9.0 ma v cc to v ee v ee = -5v, v cm = 0v v ee = 0v, v cm = 2v v cc = 5v sinking or sourcing v ol - v ee v cc - v oh v ol - v ee v cc - v oh v ol - v ee v cc - v oh 1v v out 4v, r l = 50 0.5v v out 4.5v, r l = 150 0.25v v out 4.75v, r l = 2k (v ee - 0.2v) v cm (v cc - 2.25v) r l = 2k r l = 150 r l = 75 i s v s psrr r out i sc i out v out a vol cmrr common-mode rejection ratio open-loop gain (note 2) output voltage swing (note 2) output current output short-circuit current open-loop output resistance power-supply rejection ratio (note 3) operating supply-voltage range quiescent supply current (per amplifier) r l = 50 25 50 sourcing sinking
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs _______________________________________________________________________________________ 3 ac electrical characteristics (v cc = +5v, v ee = 0v, v cm = +2.5v, r f = 24 , r l = 100 to v cc /2, v out = v cc /2, a vcl = +1v/v, t a = +25?, unless otherwise noted.) parameter symbol min typ max units 2nd harmonic 3rd harmonic total harmonic distortion spurious-free dynamic range sfdr -65 bandwidth for 0.1db gain flatness bw 0.1db 55 mhz large-signal -3db bandwidth bw ls 175 mhz 485 settling time to 0.1% t s 16 ns rise/fall time t r , t f 4 ns -65 v out = 100mv p-p small-signal -3db bandwidth bw ss 210 mhz dbc f c = 5mhz, v out = 2v p-p harmonic distortion hd -58 -63 dbc two-tone, third-order intermodulation distortion ip3 66 dbc input 1db compression point 14 dbm differential phase error dp 0.08 degrees differential gain error dg 0.02 % input noise-voltage density e n 10 nv/ hz input noise-current density i n 1.8 pa/ hz input capacitance c in 1 pf output impedance z out 1.5 conditions v out = 2v p-p v out = 2v step f1 = 4.7mhz, f2 = 4.8mhz, v out = 1v p-p v out = 100mv p-p f c = 5mhz, v out = 2v p-p f c = 10mhz, a vcl = +2v/v ntsc, r l = 150 ntsc, r l = 150 v out = 100mv p-p f = 10khz f = 10khz f = 10mhz slew rate sr v/? v out = 2v step note 1: all devices are 100% production tested at t a = +25?. specifications over temperature limits are guaranteed by design. note 2: tested with v cm = +2.5v. note 3: psr for single +5v supply tested with v ee = 0v, v cc = +4.5v to +5.5v; psr for dual ?v supply tested with v ee = -4.5v to -5.5v, v cc = +4.5v to +5.5v. channel-to-channel isolation ch iso 102 db specified at dc
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs 4 _______________________________________________________________________________________ typical operating characteristics (v cc = +5v, v ee = 0v, v cm = +2.5v, a vcl = +1v/v, r f = 24 , r l = 100 to v cc /2, t a = +25?, unless otherwise noted.) 4 -6 100k 10m 100m 1m 1g small-signal gain vs. frequency max4450-01 frequency (hz) gain (db) -5 -4 -3 -2 -1 0 1 2 3 v out = 100mv p-p 4 -6 100k 10m 100m 1m 1g large-signal gain vs. frequency max4450-02 frequency (hz) gain (db) -5 -4 -3 -2 -1 0 1 2 3 v out = 2v p-p 0.4 -0.6 100k 10m 100m 1m 1g gain flatness vs. frequency max4450-03 frequency (hz) gain (db) -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 v out = 100mv p-p 100k 10m 1m 100m 1g output impedance vs. frequency max4450-04 frequency (hz) impedance ( ) 100 0.01 0.1 1 10 2nd harmonic 3rd harmonic -10 -100 100k 100m 10m 1m distortion vs. frequency -70 -90 -30 -50 0 -60 -80 -20 -40 max4450-05 frequency (hz) distortion (dbc) v out = 2v p-p a vcl = +1v/v -10 -100 100k 100m 10m 1m distortion vs. frequency -70 -90 -30 -50 0 -60 -80 -20 -40 max4450-06 frequency (hz) distortion (dbc) 2nd harmonic 3rd harmonic v out = 2v p-p a vcl = +2v/v -10 -100 100k 100m 10m 1m distortion vs. frequency -70 -90 -30 -50 0 -60 -80 -20 -40 max4450-07 frequency (hz) distortion (dbc) 2nd harmonic 3rd harmonic v out = 2v p-p a vcl = +5v/v -100 -70 -80 -90 -60 -50 -40 -30 -20 -10 0 0 400 200 600 800 1000 1200 distortion vs. resistive load max4450-08 r load ( ) distortion (dbc) 2nd harmonic 3rd harmonic f o = 5mhz v out = 2v p-p a vcl = +1v/v -100 -70 -80 -90 -60 -50 -40 -30 -20 -10 0 0.5 1.0 1.5 2.0 distortion vs. voltage swing max4450-09 voltage swing (vp-p) distortion (dbc) f o = 5mhz a vcl = +1v/v 3rd harmonic 2nd harmonic
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs _______________________________________________________________________________________ 5 0100 0100 differential gain and phase -0.010 0 0.005 0.015 0.025 ire diff phase (degrees) diff gain (%) max4450-10 ire -0.005 0.020 0.010 -0.04 0.02 0.04 0.08 0.12 0 0.10 0.06 -0.02 0 -100 100k 10m 100m 1m 1g common-mode rejection vs. frequency max4450-11 frequency (hz) cmr (db) -90 -80 -70 -60 -50 -40 -30 -20 -10 psr (db) 0 -100 100k 10m 100m 1m 1g power-supply rejection vs. frequency max4450-12 frequency (hz) -90 -80 -70 -60 -50 -40 -30 -20 -10 0 0.4 0.2 0.6 1.2 1.4 1.0 0.8 1.6 0 100 150 200 250 50 300 350 400 450 500 output voltage swing vs. resistive load max4450-13 r load ( ) output voltage swing (v) v cc - v oh v ol - v ee max4450-14 input 50mv/div output 50mv/div small-signal pulse response voltage (v) 20ns/div r f = 24 a vcl = +1v/v input 25mv/div output 50mv/div small-signal pulse response max4450-15 voltage (v) 20ns/div r f = 500 a vcl = +2v/v input 10mv/div output 50mv/div small-signal pulse response max4450-16 voltage (v) 20ns/div r f = 500 a vcl = +5v/v input 1v/div output 1v/div large-signal pulse response max4450-17 voltage (v) 20ns/div r f = 24 a vcl = +1v/v input 500mv/div output 1v/div large-signal pulse response max4450-18 voltage (v) 20ns/div r f = 500 a vcl = +2v/v typical operating characteristics (continued) (v cc = +5v, v ee = 0, v cm = +2.5v, a vcl = +1v/v, r f = 24 , r l = 100 to v cc /2, t a = +25?, unless otherwise noted.)
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs 6 _______________________________________________________________________________________ typical operating characteristics (continued) (v cc = +5v, v ee = 0, v cm = +2.5v, a vcl = +1v/v, r f = 24 , r l = 100 to v cc /2, t a = +25?, unless otherwise noted.) 20ns/div input 1v/div input 1v/div large-signal pulse response max4450-19 voltage (v) r f = 500 a vcl = +2v/v 1 10k 100 10 1k 100k 1m 10m voltage noise vs. frequency max4450-20 frequency (hz) 1 10 100 r l = 100 voltage noise (nv/ hz) 9 11 10 13 12 15 14 16 0 200 100 300 400 50 250 150 350 450 500 isolation resistance vs. capacitive load max4450-22 c load (pf) r iso ( ) large signal (v out = 2v p-p ) small signal (v out = 100mv p-p ) 0 50 100 150 200 250 300 0200 100 300 400 500 600 700 800 small-signal bandwidth vs. load resistance max4450-23 r load ( ) bandwidth (mhz) 80 0 100 1k 10k open-loop gain vs. resistive load 20 10 max4450-24 r load ( ) open-loop gain (dbc) 40 30 50 60 70 current noise (pa/ hz) 1 10k 100 10 1k 100k 1m 10m current noise vs. frequency max4450-21 frequency (hz) 1 10 100 r l = 100 max4451 crosstalk vs. frequency max4450-25 frequency (hz) crosstalk (db) -140 -80 -100 -120 -60 -40 -20 0 20 40 60 0.1m 1m 10m 100m 1g
detailed description the max4450/max4451 are single-supply, rail-to-rail, voltage-feedback amplifiers that employ current-feed- back techniques to achieve 485v/? slew rates and 210mhz bandwidths. excellent harmonic distortion and differential gain/phase performance make these ampli- fiers an ideal choice for a wide variety of video and rf signal-processing applications. the output voltage swings to within 55mv of each sup- ply rail. local feedback around the output stage ensures low open-loop output impedance to reduce gain sensitivity to load variations. the input stage per- mits common-mode voltages beyond the negative sup- ply and to within 2.25v of the positive supply rail. applications information choosing resistor values unity-gain configuration the max4450/max4451 are internally compensated for unity gain. when configured for unity gain, the devices require a 24 resistor (r f ) in series with the feedback path. this resistor improves ac response by reducing the q of the parallel lc circuit formed by the parasitic feedback capacitance and inductance. inverting and noninverting configurations select the gain-setting feedback (r f ) and input (r g ) resistor values to fit your application. large resistor val- ues increase voltage noise and interact with the amplifi- er? input and pc board capacitance. this can generate undesirable poles and zeros and decrease bandwidth or cause oscillations. for example, a nonin- verting gain-of-two configuration (r f = r g ) using 1k resistors, combined with 1pf of amplifier input capaci- tance and 1pf of pc board capacitance, causes a pole at 159mhz. since this pole is within the amplifier band- width, it jeopardizes stability. reducing the 1k resis- tors to 100 extends the pole frequency to 1.59ghz, but could limit output swing by adding 200 in parallel with the amplifier? load resistor. table 1 lists suggest- ed feedback and gain resistors, and bandwidths for several gain values in the configurations shown in figures 1a and 1b. layout and power-supply bypassing these amplifiers operate from a single +4.5v to +11v power supply or from dual ?.25v to ?.5v supplies. for single-supply operation, bypass v cc to ground with a max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs _______________________________________________________________________________________ 7 pin description pin out v ee in+ ina- outa v cc in- inb+ inb- outb ina+ 4 2 1 8 5 6 7 3 1 amplifier output 2 negative power supply or ground (in single- supply operation) 3 noninverting input amplifier a inverting input amplifier a output 5 positive power supply 4 inverting input amplifier b noninverting input amplifier b inverting input amplifier b output amplifier a noninverting input in r g v out = [1+ (r f / r g )] v in r f r to r tin r o v out max445 _ figure 1a. noninverting gain configuration in r g v out = -(r f / r g ) v in r f r to r s r tin r o v out max445 _ figure 1b. inverting gain configuration function max4450 name max4451
note: r l = r o + r to ; r tin and r to are calculated for 50 applications. for 75 systems, r to = 75 ; calculate r tin from the following equation: 0.1? capacitor as close to the pin as possible. if operat- ing with dual supplies, bypass each supply with a 0.1? capacitor. maxim recommends using microstrip and stripline tech- niques to obtain full bandwidth. to ensure that the pc board does not degrade the amplifier? performance, design it for a frequency greater than 1ghz. pay care- ful attention to inputs and outputs to avoid large para- sitic capacitance. whether or not you use a constant- impedance board, observe the following design guide- lines: don? use wire-wrap boards; they are too inductive. don? use ic sockets; they increase parasitic capaci- tance and inductance. use surface-mount instead of through-hole compo- nents for better high-frequency performance. use a pc board with at least two layers; it should be as free from voids as possible. keep signal lines as short and as straight as possi- ble. do not make 90 turns; round all corners. rail-to-rail outputs, ground-sensing input the input common-mode range extends from (v ee - 200mv) to (v cc - 2.25v) with excellent common- mode rejection. beyond this range, the amplifier output is a nonlinear function of the input, but does not under- go phase reversal or latchup. the output swings to within 55mv of either power- supply rail with a 2k load. the input ground sensing and the rail-to-rail output substantially increase the dynamic range. with a symmetric input in a single +5v application, the input can swing 2.95v p-p and the out- put can swing 4.9v p-p with minimal distortion. output capacitive loading and stability the max4450/max4451 are optimized for ac perfor- mance. they are not designed to drive highly reactive loads, which decrease phase margin and may produce excessive ringing and oscillation. figure 2 shows a cir- cuit that eliminates this problem. figure 3 is a graph of the optimal isolation resistor (r s ) vs. capacitive load. figure 4 shows how a capacitive load causes exces- sive peaking of the amplifier? frequency response if the capacitor is not isolated from the amplifier by a resistor. a small isolation resistor (usually 20 to 30 ) placed before the reactive load prevents ringing and oscillation. at higher capacitive loads, ac performance is controlled by the interaction of the load capacitance and the isolation resistor. figure 5 shows the effect of a 27 isolation resistor on closed-loop response. coaxial cable and other transmission lines are easily driven when properly terminated at both ends with their characteristic impedance. driving back-terminated transmission lines essentially eliminates the line? capacitance. table 1. recommended component values max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs 8 _______________________________________________________________________________________ -25 +25 -10 +10 -5 +5 -2 +2 -1 +1 49.9 10 0 50 1200 gain (v/v) 49.9 5 49.9 20 500 49.9 15 0 50 500 49.9 11 49.9 56 500 49.9 25 100 0 100 500 49.9 25 49.9 124 500 49.9 50 62 0 250 500 49.9 95 49.9 500 500 49.9 49.9 r to ( ) 100 210 small-signal -3db bandwidth (mhz) 56 49.9 r tin ( ) 0 r s ( ) component 500 r g ( ) 500 24 r f ( ) r = 75 1- 75 r tin g
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs _______________________________________________________________________________________ 9 r g r f r iso 50 c l v out v in r tin max445 _ figure 2. driving a capacitive load through an isolation resistor 30 25 20 5 10 15 0 capacitive load, c l (pf) 50 0 100 200 150 250 isolation resistance, r iso ( ) figure 3. capacitive load vs. isolation resistance 6 -4 100k 10m 100m 1m 1g -2 frequency (hz) gain (db) 0 2 4 5 -3 -1 1 3 c l = 10pf c l = 15pf c l = 5pf figure 4. small-signal gain vs. frequency with load capacitance and no isolation resistor 3 -7 100k 10m 100m 1m 1g -5 frequency (hz) gain (db) -3 -1 1 2 -6 -4 -2 0 c l = 68pf r iso = 27 c l = 120pf c l = 47pf figure 5. small-signal gain vs. frequency with load capacitance and 27 isolation resistor
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs 10 ______________________________________________________________________________________ inb- inb+ v ee 1 2 8 7 v cc outb ina- ina+ outa sot23/so top view 3 4 6 5 max4451 pin configurations (continued) chip information max4450 transistor count: 86 max4451 transistor count: 170
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs ______________________________________________________________________________________ 11 sc70, 5l.eps package outline, 5l sc70 21-0076 1 1 e package type package code document no. 5 sc70 x5-1 21-0076 5 sot23 u5-2 21-0057 8 sot23 k8-2 21-0078 8 so s8-5 21-0041 package information for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . note that a ?? ?? or ??in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to th e package regardless of rohs status.
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs 12 ______________________________________________________________________________________ sot-23 5l .eps package information (continued) for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . note that a ?? ?? or ??in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to th e package regardless of rohs status.
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs ______________________________________________________________________________________ 13 package information (continued) for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . note that a ?? ?? or ??in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to th e package regardless of rohs status. 0 0 marking package outline, sot-23, 8l body 21-0078 i 1 1
max4450/max4451 ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs 14 ______________________________________________________________________________________ soicn .eps pac k ag e ou tline , . 1 5 0 " so i c 1 1 21 - 00 4 1 b r ev. docum ent co nt ro l n o . appro v a l propr iet ar y inf orma ti o n title: t op view f ro nt view ma x 0 . 010 0 . 0 69 0 . 01 9 0 . 1 5 7 0 . 010 in c he s 0 . 1 5 0 0 . 007 e c d i m 0 . 01 4 0 . 00 4 b a1 m in 0 . 0 5 3 a 0 . 1 9 3 . 80 4. 00 0 . 2 5 m illi m ete rs 0 . 10 0 . 3 5 1 . 3 5 m in 0 .49 0 . 2 5 ma x 1 . 7 5 0 . 0 5 0 0 . 01 6 l 0 .4 01 . 27 0 . 3 94 0 . 38 6 d d m in d i m d in c he s ma x 9. 80 10 . 00 m illi m ete rs m in ma x 1 6 ac 0 . 337 0 . 3 44 ab 8 . 7 5 8 .55 1 4 0 . 18 9 0 . 1 9 7aa 5. 00 4. 80 8 n ms012 n s i d e view h 0 . 2 44 0 . 228 5. 80 6. 20 e 0 . 0 5 0 bsc 1 . 27 bsc c h e e b a1 a d 0 - 8 l 1 v ar i a ti o n s : package information (continued) for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . note that a ?? ?? or ??in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to th e package regardless of rohs status.
ultra-small, low-cost, 210mhz, single-supply op amps with rail-to-rail outputs 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. 15 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2009 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 4 11/09 corrected toc 20 6

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