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general description the max4023?ax4026 family of voltage feedback multiplexer-amplifiers combine low-glitch switching and excellent video specifications with fixed or settable gain. the max4024/max4026 are triple and quad 2:1 multiplexers, respectively, with amplifiers that have a fixed gain of +2. the max4023/max4025 are triple and quad 2:1 multiplexers, respectively, with adjustable gain amplifiers optimized for unity-gain stability. all devices have 25ns channel switching time and low 10mv p-p switching transients, making them ideal for high-speed video-switching applications. these devices operate from a single +4.5v to +11v supply or from dual supplies of ?.25v to ?.5v, and feature an input common-mode voltage range that extends to the negative supply rail. a low-power disable mode places the output in a high-impedance state. the max4023/max4025 have -3db bandwidths of 260mhz and up to 330v/? slew rates with a settable gain to equalize long cable runs. the max4024/ max4026, with 200mhz -3db bandwidths and 363v/? slew rates, have a fixed gain of +2 for driving short back-terminated cables. the max4023/max4025 inter- nal amplifiers maintain an open-loop output impedance of only 18 ? over the full output voltage range, and mini- mize the gain error and bandwidth changes under loads typical of most rail-to-rail amplifiers. these devices are ideal for broadcast video applications with differential gain and phase errors of 0.07% and 0.07? respectively. applications set-top boxes in-car navigation/entertainment servers security systems video projectors notebook computers broadcast video video crosspoint switching features single +5v or dual ?v operation 260mhz -3db bandwidth (max4023/max4025) 200mhz -3db bandwidth (max4024/max4026) 363v/? slew rate (max4024/max4026) 25ns channel switching time ultra-low 20mv p-p switching transient 0.012%/0.05 differential gain/phase error input common-mode range includes negative rail (max4023/max4025) low-power disable mode available in space-saving 14-pin tssop and 16-pin qsop packages max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain ________________________________________________________________ maxim integrated products 1 video source 1 r g b r g b triple 2:1 mux display source select en r g b video source 2 max4024 x 2 x 2 x 2 typical operating circuit 19-2758; rev 0; 1/03 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 temp range pin-package max4023 eee -40 c to +85 c 16 qsop max4023ese -40 c to +85 c 16 narrow so max4024 eud -40 c to +85 c 14 tssop max4024esd -40 c to +85 c 14 narrow so max4025 eup -40 c to +85 c 20 tssop max4025ewp -40 c to +85 c 20 wide so max4026 eup -40 c to +85 c 20 tssop MAX4026EWP -40 c to +85 c 20 wide so selector guide and pin configurations appear at end of data sheet. rail-to-rail is a registered trademark of nippon motorola, ltd.
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain 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. supply voltage (v cc to v ee ) ..................................................12v in_a, in_b, fb_ ...............................(v ee - 0.3v) to (v cc + 0.3v) ref, en, a/b ....................................(v ee - 0.3v) to (v cc + 0.3v) current into in_a, in_b, fb_ ............................................20ma short-circuit duration (out_ to gnd or v ee ) ............continuous short-circuit duration (out_ to v cc )..............................(note 1) continuous power dissipation (t a = +70 c) 14-pin tssop (derate 9.1mw/ c above +70 c) .........727mw 14-pin narrow so (derate 8.3mw/ c above +70 c) ...667mw 16-pin qsop (derate 8.3mw/ c above +70 c)...........667mw 16-pin narrow so (derate 8.7mw/ c above +70 c) ...696mw 20-pin tssop (derate 10.9mw/ c above +70 c) .......879mw 20-pin wide so (derate 10mw/ c above +70 c)........800mw operating temperature range ...........................-40 c to +85 c junction temperature ......................................................+150 c storage temperature range .............................-65 c to +150 c lead temperature (soldering, 10s) .................................+300 c note 1: do not short out_ to v cc . dc electrical characteristics?ual supply (v cc = +5v, v ee = -5v, r l = , en = +5v, v cm = ref = out_ = 0v, t a = t min to t max , unless otherwise noted. typical values are at t a =+25 c.) (note 2) parameter symbol conditions min typ max units o p er ati ng s up p l y v ol tag e range v s guaranteed by psrr 2.25 5.5 v max4023/max4024 25 36 quiescent supply current i s out = 0v max4025/max4026 34 48 ma max4023/max4024 3.6 6 disable supply current en = 0v max4025/max4026 4.4 6 ma max4023/max4025, inferred from cmrr v ee v cc - 2.8 input voltage range v in max4024/max4026, inferred from a vcl v ee + 2.9 v cc - 2.8 v max4023/max4025 0.5 15 input offset voltage v os max4024/max4026 1 18 mv max4023/max4025 1 input offset voltage matching ? v os max4024/max4026 1.5 mv max4023/max4025 15 input offset voltage drift tc vos max4024/max4026 23 v c input bias current i b 414a input offset current i os max4023/max4025 0.1 2 a differential input resistance r ind m ax 4023/m ax 4025, - 10m v < v in d < + 10m v 50 k ? max4023/max4025, common mode 4.5 input resistance r in max4024/max4026, single ended 4.5 m ? open loop 18 max4023/max4025 cl osed l oop , a vc l = +1 0.025 output resistance r out max4024/max4026 0.15 ?
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain _______________________________________________________________________________________ 3 dc electrical characteristics dual supply (continued) (v cc = +5v, v ee = -5v, r l = , en = +5v, v cm = ref = out_ = 0v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25 c.) (note 2) parameter symbol conditions min typ max units max4023/max4025, en = 0v 75 disable output resistance r out max4024/max4026, en = 0v 1 k ? power-supply rejection ratio psrr 2.25v < v s < 5.5v 50 64 db common-mode rejection ratio cmrr m ax4023/m ax4025, v e e < v c m < v c c - 2.8v 50 68 db open-loop gain a vol max4023/max4025, r l = 150 ? , -4.3v < v out < +4.3v 70 85 db voltage gain a vcl max4024/max4026, r l = 150 ? , v ee + 2.9v < v in < v cc - 2.8v 5.5 6.0 6.5 db gain matching ? a vcl max4024/max4026 1 % v c c - 0.7 v cc - 0.5 r l = 150 ? v ee + 0.5 v ee + 0.7 v cc - 1.2 v cc - 0.8 max4023/max4025 r l = 75 ? v ee + 0.8 v ee + 1.2 v c c - 0.7 v c c - 0.5 r l = 150 ? v ee + 0.3 v ee + 0.7 v cc - 1.2 v cc - 0.8 output voltage swing v out max4024/max4026 r l = 75 ? v ee + 0.5 v ee + 1.2 v logic input characteristics logic-low threshold v il en, a/b v cc - 3.85 v logic-high threshold v ih en, a/b v cc - 3.3 v logic-low input current i il en, a/b; en or a/b = 0v 5 10 a logic-high input current i ih en, a/b; en or a/b = v cc 28a
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain 4 _______________________________________________________________________________________ dc electrical characteristics single supply (v cc = +5v, v ee = 0v, r l = , en = +5v, v cm = ref = out = 0.5v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25 c.) (note 2) parameter symbol conditions min typ max units o p er ati ng s up p l y v ol tag e rang e v s guaranteed by psrr 4.5 11 v max4023/max4024, out = 0v 19 32 quiescent supply current i s max4025/max4026, out = 0v 31 43 ma max4023/max4024, en = 0v 3.3 6 disable supply current max4025/max4026, en = 0v 3.9 6 ma max4023/max4025, inferred from cmrr v ee v cc - 2.8 input voltage range v in max4024/max4026, inferred from a vcl v ee + 0.28 v cc - 2.8 v max4023/max4025 1 18 input offset voltage v os max4024/max4026 3 20 mv max4023/max4025 1 input offset voltage matching ? v os max4024/max4026 1.5 mv max4023/max4025 9 input offset voltage drift tc vos max4024/max4026 13 v c input bias current i b 4.5 14 a input offset current i os max4023/max4025 0.1 2 a differential input resistance r ind m ax 4023/m ax 4025, - 10m v < v in d < + 10m v 50 k ? max4023/max4025, common mode 4.5 input resistance r in max4024/max4026, single ended 4.5 m ? open loop 18 max4023/max4025 c l osed l oop , a v c l = + 1 0.025 output resistance r out max4024/max4026 0.15 ? max4023/max4025, en = 0v 75 disable output resistance r out max4024/max4026, en = 0v 1 k ? power-supply rejection ratio psrr 4.5v < v s < 11v 50 64 db common-mode rejection ratio cmrr max4023/max4025, v ee < v cm < v cc - 2.8v 50 91 db open-loop gain a vol m ax 4023/m ax 4025, r l = 150 ? , 0.3v < v ou t < 4.3v 70 85 db voltage gain a vcl max4024/max4026, r l = 150 ? , v ee + 0.28v < v in < v cc - 2.8v 5.5 6.0 6.5 db gain matching ? a vcl max4024/max4026 1 %
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain _______________________________________________________________________________________ 5 dc electrical characteristics single supply (continued) (v cc = +5v, v ee = 0v, r l = , en = +5v, v cm = ref = out = 0.5v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25 c.) (note 2) parameter symbol conditions min typ max units v cc - 1.1 v cc - 0.5 r l = 150 ? to gnd v e e + 0.03 v e e + 0.175 v cc - 1.1 v cc - 0.8 max4023/max4025 r l = 75 ? to gnd v e e + 0.03 v e e + 0.175 v cc - 1.1 v cc - 0.5 r l = 150 ? to gnd v e e + 0.03 v e e + 0.09 v cc - 1.1 v cc - 0.8 output voltage swing v out max4024/max4026 r l = 75 ? to gnd v e e + 0.04 v e e + 0.08 v logic input characteristics logic-low threshold v il en, a/b v cc - 3.85 v logic-high threshold v ih en, a/b v cc - 3.3 v logic-low input current i il en, a/b; en or a/b = 0v 5 10 a logic-high input i ih en, a/b; en or a/b = v cc 28a
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain 6 _______________________________________________________________________________________ ac electrical characteristics dual supply (v cc = +5v, v ee = -5v, r in = 75 ? to gnd, r l = 150 ? to gnd, en = +5v, v cm = 0v, ref = 0v, a vcl = +1 (max4023/max4025). typical values are at t a = +25 c, unless otherwise noted.) parameter symbol conditions min typ max units max4023/max4025 260 small-signal -3db bandwidth bw ss v out = 100mv p-p max4024/max4026 200 mhz max4023/max4025 85 large-signal -3db bandwidth bw ls v out = 2v p-p max4024/max4026 110 mhz max4023/max4025 30 small-signal 0.1db gain-flatness bandwidth bw 0.1dbss v out = 100mv p-p max4024/max4026 32 mhz max4023/max4025 22 large-signal 0.1db gain-flatness bandwidth bw 0.1dbls v out = 2v p-p max4024/max4026 24 mhz max4023/max4025 300 slew rate sr v out = 2v p-p max4024/max4026 363 v/s max4023/max4025 32 settling time to 0.1% t s v out = 2v step max4024/max4026 32 ns power-supply rejection ratio psrr f = 100khz 60 db output impedance f = 10mhz 1.5 ? max4023/max4025 0.012 differential gain error dg n ts c , p al, a v c l = + 2 max4024/max4026 0.015 % max4023/max4025 0.05 differential phase error dp n ts c , p al, a v c l = + 2 max4024/max4026 0.077 d eg r ees max4023/max4025 1.6 group delay d/dt f = 3.58mhz or 4.43mhz, a vcl = +2 max4024/max4026 1.8 ns max4023/max4025 90 peak signal to rms noise snr v out = 2v p-p , 10mhz bw, a vcl = +2 max4024/max4026 86 db crosstalk f = 10mhz -61 db switching characteristics max4023/max4025 25 channel switching time t sw max4024/max4026 25 ns enable time t on v in = 0.5v 60 ns disable time t off v in = 0.5v 0.45 s max4023/max4025 20 switching transient max4024/max4026 20 mv p-p
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain _______________________________________________________________________________________ 7 ac electrical characteristics single supply (v cc = +5v, v ee = 0v, r in = 75 ? to v cm , r l = 150 ? to gnd, en = +5v, v cm = 0.5v, ref = v cm , a vcl = +1 (max4023/max4025). typical values are at t a = +25 c, unless otherwise noted.) parameter symbol conditions min typ max units max4023/max4025 260 small-signal -3db bandwidth bw ss v out = 100mv p-p max4024/max4026 200 mhz max4023/max4025 83 large-signal -3db bandwidth bw ls v out = 2v p-p max4024/max4026 110 mhz max4023/max4025 40 small-signal 0.1db gain-flatness bandwidth bw 0.1dbss v out = 100mv p-p max4024/max4026 44 mhz max4023/max4025 22 large-signal 0.1db gain-flatness bandwidth bw 0.1dbls v out = 2v p-p max4024/max4026 25 mhz max4023/max4025 300 slew rate sr v out = 2v p-p max4024/max4026 363 v/s max4023/max4025 32 settling time to 0.1% t s v out = 2v step max4024/max4026 32 ns power-supply rejection ratio psrr f = 100khz 60 db output impedance f = 10mhz 1.5 ? max4023/max4025 0.016 differential gain error dg n ts c , p al, a v c l = + 2 max4024/max4026 0.02 % max4023/max4025 0.054 differential phase error dp n ts c , p al, a v c l = + 2 max4024/max4026 0.085 d eg r ees max4023/max4025 1.6 group delay d/dt f = 3.58mhz or 4.43mhz, a vcl = +2 max4024/max4026 1.9 ns max4023/max4025 90 peak signal to rms noise snr v out = 2v p-p , 10mhz bw, a vcl = +2 max4024/max4026 86 db crosstalk f = 10mhz -61 db switching characteristics max4023/max4025 25 channel switching time t sw max4024/max4026 25 ns enable time t on v in = 0.5v 90 ns disable time t off v in = 0.5v 0.45 s max4023/max4025 10 switching transient max4024/max4026 10 mv p-p note 2: all devices are 100% production tested at t a = +25 c. specifications over temperature are guaranteed by design.
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain 8 _______________________________________________________________________________________ typical operating characteristics?5v dual supply (v cc = +5v, v ee = -5v, v cm = ref = 0v, en = +5v, r in = 75 ? to gnd, r l = 150 ? to gnd, a vcl = +1v/v (max4023/max4025), a vcl = +2v/v (max4024/max4026), t a = +25 c, unless otherwise noted.) max4023/max4025 small-signal bandwidth vs. frequency max4023/25 toc01 frequency (mhz) gain (db) 100 10 1 -4 -3 -2 -1 0 1 2 3 4 5 -5 0.1 1000 max4023/max4025 small-signal gain flatness vs. frequency max4023/25 toc02 frequency (mhz) gain (db) 100 10 1 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 -0.5 0.1 1000 max4023/max4025 large-signal bandwidth vs. frequency max4023/25 toc03 frequency (mhz) gain (db) 100 10 1 -4 -3 -2 -1 0 1 2 3 4 5 -5 0.1 1000 max4023/max4025 large-signal gain flatness vs. frequency max4023/25 toc04 frequency (mhz) gain (db) 100 10 1 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 -0.5 0.1 1000 max4024/max4026 small-signal bandwidth vs. frequency max4023/25 toc05 frequency (mhz) normalized gain (db) 100 10 1 -4 -3 -2 -1 0 1 2 3 4 5 -5 0.1 1000 max4024/max4026 small-signal gain flatness vs. frequency max4023/25 toc06 frequency (mhz) normalized gain (db) 100 10 1 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 -0.5 0.1 1000 max4024/max4026 large-signal bandwidth vs. frequency max4023/25 toc07 frequency (mhz) normalized gain (db) 100 10 1 -4 -3 -2 -1 0 1 2 3 4 5 -5 0.1 1000 max4024/max4026 large-signal gain flatness vs. frequency max4023/25 toc08 frequency (mhz) normalized gain (db) 100 10 1 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 -0.5 0.1 1000 6th 5th 4th 3rd 2nd 1st 6th 5th 4th 3rd 2nd 1st max4023/max4025 differential gain and phase -0.2 -0.3 -0.1 0 0.1 0.2 0.3 -0.2 -0.3 -0.1 0 0.1 0.2 0.3 differential phase ( ) differential gain (%) max4023/25 toc09
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain _______________________________________________________________________________________ 9 6th 5th 4th 3rd 2nd 1st 6th 5th 4th 3rd 2nd 1st max4024/max4026 differential gain and phase -0.2 -0.3 -0.1 0 0.1 0.2 0.3 -0.2 -0.3 -0.1 0 0.1 0.2 0.3 differential phase ( ) differential gain (%) max4023/25 toc10 power-supply rejection ratio vs. frequency max4023/25 toc11 frequency (mhz) psrr (db) 10 1 0.1 -100 -80 -60 -40 -20 0 -120 0.01 100 0 -100 0.01 0.1 100 1000 max4023/max4025 common-mode rejection ratio vs. frequency -80 -60 -40 -20 max4023/25 toc12 frequency (mhz) cmrr (db) 110 1 10 100 1000 off-isolation vs. frequency max4023/25 toc13 frequency (mhz) off-isolation (db) 0 -120 -100 -80 -60 -40 -20 frequency (mhz) crosstalk (db) 100 10 1 1000 all-hostile crosstalk vs. frequency max4023/25 toc14 -80 -60 -40 -20 0 -100 100 0.1 1 100 1000 output impedance vs. frequency 1 10 max4023/25 toc15 frequency (mhz) output impedance ( ? ) 10 1000 10 0.01 0.1 100 1000 input voltage-noise density vs. frequency 100 max4023/25 toc16 frequency (khz) 110 voltage-noise density (nv/ hz) max4023/max4025 large-signal transient response max4023/25 toc17 20ns/div input 1v/div output 1v/div max4023/max4025 small-signal transient response max4023/25 toc18 20ns/div input 50mv/div output 50mv/div typical operating characteristics?5v dual supply (continued) (v cc = +5v, v ee = -5v, v cm = ref = 0v, en = +5v, r in = 75 ? to gnd, r l = 150 ? to gnd, a vcl = +1v/v (max4023/max4025), a vcl = +2v/v (max4024/max4026), t a = +25 c, unless otherwise noted.)
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain 10 ______________________________________________________________________________________ max4024/max4026 large-signal transient response max4023/25 toc19 20ns/div input 500mv/div output 1v/div max4024/max4026 small-signal transient response max4023/25 toc20 20ns/div input 25mv/div output 50mv/div channel switching transient max4023/25 toc21 20ns/div v a/b 5v/div v out 20mv/div enable response time max4023/25 toc22 20ns/div v en 5v/div v out 500mv/div max4023/max4025 small-signal bandwidth vs. frequency vs. c l max4023/25 toc23 frequency (mhz) gain (db) 100 10 1.0 -4 -3 -2 -1 0 1 2 3 4 5 -5 1000 c l = 15pf c l = 10pf c l = 5pf c l = 0pf optimal isolation resistor vs. capacitive load max4023/25 toc24 capacitive load (pf) optimal isolation resistor ( ? ) 150 200 100 50 10 20 30 40 50 0 0 250 max4023 r l = 150 ? typical operating characteristics?5v dual supply (continued) (v cc = +5v, v ee = -5v, v cm = ref = 0v, en = +5v, r in = 75 ? to gnd, r l = 150 ? to gnd, a vcl = +1v/v (max4023/max4025), a vcl = +2v/v (max4024/max4026), t a = +25 c, unless otherwise noted.)
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain ______________________________________________________________________________________ 11 max4023/max4025 small-signal bandwidth vs. frequency max4023/25 toc25 frequency (mhz) normalized gain (db) 100 10 1 -4 -3 -2 -1 0 1 2 3 4 5 -5 0.1 1000 max4023/max4025 small-signal gain flatness vs. frequency max4023/25 toc26 frequency (mhz) gain (db) 100 10 1 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 -0.5 0.1 1000 max4023/max4025 large-signal bandwidth vs. frequency max4023/25 toc27 frequency (mhz) gain (db) 100 10 1 -4 -3 -2 -1 0 1 2 3 4 5 -5 0.1 1000 max4023/max4025 large-signal gain flatness vs. frequency max4023/25 toc28 frequency (mhz) gain (db) 100 10 1 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 -0.5 0.1 1000 max4024/max4026 small-signal bandwidth vs. frequency max4023/25 toc29 frequency (mhz) normalized gain (db) 100 10 1 -4 -3 -2 -1 0 1 2 3 4 5 -5 0.1 1000 max4024/max4026 small-signal gain flatness vs. frequency max4023/25 toc30 frequency (mhz) normalized gain (db) 100 10 1 -0.5 -0.6 -0.4 -0.3 0.1 0 -0.1 -0.2 0.2 0.3 0.4 0.5 0.6 0.7 -0.7 0.1 1000 max4024/max4026 large-signal bandwidth vs. frequency max4023/25 toc31 frequency (mhz) normalized gain (db) 100 10 1 -4 -3 -2 -1 0 1 2 3 4 5 -5 0.1 1000 max4024/max4026 large-signal gain flatness vs. frequency max4023/25 toc32 frequency (mhz) normalized gain (db) 100 10 1 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.5 0.1 1000 typical operating characteristics?5v single supply (v cc = +5v, v ee = 0v, v cm = 0.5v, v ref = v cm , en = +5v, r in = 75 ? to v cm , r l = 150 ? to gnd, a vcl = +1v/v (max4023/max4025), a vcl = +2v/v (max4024/max4026), t a = +25 c, unless otherwise noted.)
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain 12 ______________________________________________________________________________________ typical operating characteristics?5v single supply (continued) (v cc = +5v, v ee = 0v, v cm = 0.5v, v ref = v cm , en = +5v, r in = 75 ? to v cm , r l = 150 ? to gnd, a vcl = +1v/v (max4023/max4025), a vcl = +2v/v (max4024/max4026), t a = +25 c, unless otherwise noted.) 6th 5th 4th 3rd 2nd 1st 6th 5th 4th 3rd 2nd 1st max4023/max4025 differential gain and phase -0.2 -0.3 -0.1 0 0.1 0.2 0.3 -0.2 -0.3 -0.1 0 0.1 0.2 0.3 differential phase ( ) differential gain (%) max4023/25 toc33 6th 5th 4th 3rd 2nd 1st 6th 5th 4th 3rd 2nd 1st max4024/max4026 differential gain and phase -0.2 -0.3 -0.1 0 0.1 0.2 0.3 -0.2 -0.3 -0.1 0 0.1 0.2 0.3 differential phase ( ) differential gain (%) max4023/25 toc34 pin max4023 so/qsop max4024 so/tssop max4025 so/tssop max4026 so/tssop name function 1 1 1 1 in1a amplifier input 1a 2 2 2 2 in2a amplifier input 2a 3 3 3 3 in3a amplifier input 3a 4 4 5 5, 6 v ee negative power-supply voltage. bypass v ee to gnd with a 0.1f capacitor. connect v ee to gnd for single-supply operation. 5 13 6 17 a/b channel select input. pull a/b high to select channel a. drive a/b low to select channel b. 6 5 7 7 in1b amplifier input 1b 7 6 8 8 in2b amplifier input 2b 8 7 9 9 in3b amplifier input 3b 9 14 fb3 amplifier feedback input for amplifier 3 10 9 13 13 out3 amplifier output 3 11 10 18 18 out2 amplifier output 2 12 17 fb2 amplifier feedback input for amplifier 2 13 11 15 14 en enable input. pull en high for normal operation. drive en low to disable all outputs. pin description
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain ______________________________________________________________________________________ 13 pin max4023 so/qsop max4024 so/tssop max4025 so/tssop max4026 so/tssop name function 14 12 16 15, 16 v cc positive power-supply voltage. bypass v cc to gnd with a 0.1f capacitor. 15 14 19 19 out1 amplifier output 1 16 20 fb1 amplifier feedback input for amplifier 1 8 11, 20 ref reference pin for internal gain resistor network 4 4 in4a amplifier input 4a 10 10 in4b amplifier input 4b 11 fb4 amplifier feedback input for amplifier 4 12 12 out4 amplifier output 4 pin description (continued) en out1 fb1 mux1 in1a a/b in1b v cc v cc v ee v ee en out1 to ref mux1 in1a a/b in1b out2 to ref mux2 in2a to a/b in2b out3 ref mux3 in3a in3b to en to en to en to en out2 fb2 mux2 in2a to a/b in2b out3 fb3 mux3 in3a to a/b to a/b in3b max4023 max4024 functional diagrams
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain 14 ______________________________________________________________________________________ detailed description the max4024/max4026 combine three and four 2:1 multiplexers, respectively, with a fixed gain of 2 amplifi- er. the max4023/max4025 combine three and four 2:1 multiplexers, respectively, with an adjustable gain out- put amplifier optimized for a closed-loop gain of +1 or greater. these devices operate from a single-supply voltage of +4.5v to +11v or from dual supplies of 2.25v to 5.5v. the outputs may be placed in a high- impedance state and the supply current minimized by forcing the en pin low. the input multiplexers feature short 25ns channel-switching times and small 10mv p-p switching transients. these devices feature voltage- feedback output amplifiers that achieve up to 363v/s slew rates and up to 220mhz -3db bandwidths. they also feature excellent differential gain/phase perfor- mance. the max4023 max4026 feature an a/b pin, which is an input pin for selecting either channel a or b. drive a/b high to select channel a or drive a/b low to select channel b. channel a is automatically selected if a/b is left unconnected. applications information feedback and gain resistor selection (max4023/max4025) select the max4023/max4025 gain-setting feedback r f and r g resistors to fit your application. large resis- tor values increase voltage noise and interact with the amplifier s input and pc board capacitance. this can generate undesirable poles and zeros, and can decrease bandwidth or cause oscillations. stray capacitance at the fb pin produces peaking in the frequency-response curve. keep the capacitance at fb as low as possible by using surface-mount resis- tors and by avoiding the use of a ground plane beneath or beside these resistors and the fb pin. some capaci- tance is unavoidable. if necessary, its effects can be neutralized by adjusting r f . use 1% resistors to main- tain gain accuracy. low-power shutdown mode all parts feature a low-power shutdown mode that is activated by driving the en input low. placing the amplifier in shutdown mode reduces the quiescent sup- ply current to below 4ma and places the output into a high-impedance state, typically 75k ? (max4023/ max4025). multiple devices may be paralleled to con- struct larger switch matrices by connecting the outputs of several devices together and disabling all but one of the paralleled amplifiers outputs. for max4023/max4025 application circuits operating with a closed-loop gain of +1 or greater, consider the external-feedback network impedance of all devices used in the mux application when calculating the total load on the output amplifier of the active device. the max4024/max4026 have a fixed gain of +2 that is internally set with two 500 ? thin-film resistors. the impedance of the internal feedback resistors must be taken into account when operating multiple max4024/ max4026s in large multiplexer applications. for normal operation, drive en high. note that the max4023 max4026 have internal pullup circuitry on en, so if left unconnected, it is automatically pulled up to v cc . layout and power-supply bypassing the max4023 max4026 have high bandwidths and consequently require careful board layout, including the possible use of constant-impedance microstrip or stripline techniques. to realize the full ac performance of these high-speed amplifiers, pay careful attention to power-supply bypassing and board layout. the pc board should have at least two layers: a signal and power layer on one side, and a large, low-impedance ground plane on the other side. the ground plane should be as free of voids as possible, with one exception: the feedback (fb) should have as low a capacitance to ground as possible. whether or not a constant-impedance board is used, it is best to observe the following guidelines when designing the board: 1) do not use wire-wrapped boards or breadboards. 2) do not use ic sockets; they increase parasitic capacitance and inductance. 3) keep signal lines as short and straight as possible. do not make 90 turns; round all corners. 4) observe high-frequency bypassing techniques to maintain the amplifier s accuracy and stability. 5) use surface-mount components. they generally have shorter bodies and lower parasitic reactance, yielding better high-frequency performance than through-hole components. the bypass capacitors should include a 0.1f ceramic surface-mount capacitor between each supply pin and the ground plane, located as close to the package as possible. optionally, place a 10f tantalum capacitor at the power-supply s point of entry to the pc board to ensure the integrity of incoming supplies. the power- supply traces should lead directly from the tantalum capacitor to the v cc and v ee pins. to minimize para-
sitic inductance, keep pc traces short and use surface- mount components. if input termination resistors and output back-termina- tion resistors are used, they should be surface-mount types, and should be placed as close to the ic pins as possible. video line driver the max4024/max4026 are well suited to drive short coaxial transmission lines when the cable is terminated at both ends (as shown in figure 2a) where the fixed gain of +2 compensates for the loss in the resistors. the max4023/max4025 have settable gain to equalize long cables. the max4023/max4025 allow adding functions that normally require additional op amps. for example, a cable driver can boost the high frequen- cies for long runs, making the part perform multiple functions. figure 2b shows the cable booster using the max4023/max4025. driving capacitive loads a correctly terminated transmission line is purely resis- tive and presents no capacitive load to the amplifier. reactive loads decrease phase margin and may pro- duce excessive ringing and oscillation (see typical operating characteristics ). another concern when driving capacitive loads is the amplifier s output impedance, which appears inductive at high frequencies. this inductance forms an l-c reso- nant circuit with the capacitive load, which causes peaking in the frequency response and degrades the amplifier s phase margin. although the max4023 max4026 are optimized for ac performance and are not designed to drive highly capacitive loads, they are capable of driving up to 33pf without oscillations. however, some peaking may occur in the frequency domain (figure 3). to drive larg- er capacitive loads or to reduce ringing, add an isola- tion resistor between the amplifier s output and the load (figure 4). the value of r iso depends on the circuit s gain and the capacitive load (figure 5). also note that the isolation resistor forms a divider that decreases the voltage delivered to the load. max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain ______________________________________________________________________________________ 15 figure 1. max4023/max4025 noninverting gain configuration r t 75 ? r t 75 ? r t 75 ? r f r g out_ fb_ in_a in_b a/b en 75 ? cable 75 ? cable r t 75 ? 75 ? cable max4023 max4025
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain 16 ______________________________________________________________________________________ figure 2b. cable booster using the max4023/max4025 effect of boost frequency gain v cc video in a video out 75 ? video in b c b and r b are chosen such that: v ee r f r i c b r b figure 2a. video line driver r t 75 ? r t 75 ? r t 75 ? ref out_ in_a in_b a/b en 75 ? cable 75 ? cable r t 75 ? 75 ? cable max4024/ max4026
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain ______________________________________________________________________________________ 17 selector guide part pin-package no. of video mux- amps amplifier gain ( v/v ) max4023 16 so/qsop 3 +1 max4024 14 so/tssop 3 +2 max4025 20 so/tssop 4 +1 max4026 20 so/tssop 4 +2 chip information transistor count: 655 process: bipolar figure 3. small-signal bandwidth vs. frequency with capacitive load and no isolation resistor max4023/max4025 small-signal bandwidth vs. frequency vs. c l max4023/25 toc23 frequency (mhz) gain (db) 100 10 1.0 -4 -3 -2 -1 0 1 2 3 4 5 -5 1000 c l = 15pf c l = 10pf c l = 5pf c l = 0pf figure 4. using an isolation resistor (r iso ) for a high- capacitive load r iso r l c l r t 75 ? ref out_ in_a in_b a/b en 75 ? cable r t 75 ? 75 ? cable max4024 max4026 figure 5. optimal isolation resistance vs. capacitive load optimal isolation resistor vs. capacitive load max4023/25 toc24 capacitive load (pf) optimal isolation resistor ( ? ) 150 200 100 50 10 20 30 40 50 0 0 250 max4023 r l = 150 ?
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain 18 ______________________________________________________________________________________ 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 in1a fb1 out1 v cc en fb2 out2 out3 fb3 top view max4023 so/qsop in2a in3a in1b v ee a/b in2b in3b 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 fb1 out1 out2 fb2 in4a in3a in2a in1a v cc en fb3 out3 in2b in1b a/b v ee 12 11 9 10 out4 fb4 in4b in3b max4025 so/tssop 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 ref out1 out2 a/b in4a in3a in2a in1a v cc v cc en out3 in2b in1b v ee v ee 12 11 9 10 out4 ref in4b in3b max4026 so/tssop 14 13 12 11 10 9 8 1 2 3 4 5 6 7 out1 a/b v cc en v ee in3a in2a in1a max4024 out2 out3 ref in3b in2b in1b so/tssop pin configurations
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain ______________________________________________________________________________________ 19 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 .) tssop4.40mm.eps
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain 20 ______________________________________________________________________________________ package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline information, 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 mindim 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 5.004.80 8 n ms012 n side view h 0.2440.228 5.80 6.20 e 0.050 bsc 1.27 bsc c h e e b a1 a d 0-8 l 1 variations:
max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain ______________________________________________________________________________________ 21 package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline information, go to www.maxim-ic.com/packages .) qsop.eps
package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline information, go to www.maxim-ic.com/packages .) soicw.eps package outline, .300" soic 1 1 21-0042 b rev. document control no. approval proprietary information title: top view front view max 0.012 0.104 0.019 0.299 0.013 inches 0.291 0.009 e c dim 0.014 0.004 b a1 min 0.093 a 0.23 7.40 7.60 0.32 millimeters 0.10 0.35 2.35 min 0.49 0.30 max 2.65 0.050 0.016 l 0.40 1.27 0.512 0.496 d d mindim d inches max 12.60 13.00 millimeters min max 20 ac 0.447 0.463 ab 11.75 11.35 18 0.398 0.413 aa 10.50 10.10 16 n ms013 side view h 0.4190.394 10.00 10.65 e 0.050 1.27 d 0.614 0.598 15.20 24 15.60 ad d 0.713 0.697 17.70 28 18.10 ae h e n d a1 b e a 0-8 c l 1 variations: max4023?ax4026 triple and quad, 2:1 video multiplexer- amplifiers with fixed and settable gain maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 22 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2003 maxim integrated products printed usa is a registered trademark of maxim integrated products.

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