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general description the max14504/MAX14505/MAX14505a/max14506 dual single-pole/double-throw (spdt) audio switches feature negative signal capability that allows signals from -v cc to +v cc to pass without distortion. they fea- ture high continuous current ratings of 550ma (continu- ous) and 850ma (pulsed). these analog switches have low on-resistance, low supply current, and operate from a single +2.3v to +5.5v supply. the MAX14505/MAX14505a have internal shunt switches that discharge the audio amplifier ac-coupling capaci- tance at the normally open (no) terminals. this reduces click-and-pop sounds that occur when switching audio signals between precharged points. the max14504/ MAX14505/MAX14505a/max14506 control the switches with control bit, cb, and feature an enable input, en , that place com in a high-impedance mode. the max14504/MAX14505/MAX14505a/max14506 are fully specified to operate from a single +2.3v to +5.5v power supply. these devices are available in a 1.56mm x 2.14mm, 12-bump wlp package, and operate over the -40? to +85? extended temperature range. applications cell phones mp3 players portable audio equipment speaker switching features distortion-free negative signal throughput from -v cc to +v cc internal shunt switches reduce click/pop (MAX14505/MAX14505a) low on-resistance 0.36 ? (typ) 1m ? (typ) on-resistance flatness com high impedance for en = high low 0.2? (max) shutdown current (MAX14505a/max14506) +2.3v to +5.5v single-supply voltage small, 1.56mm x 2.14mm, 12-bump wlp package max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability ________________________________________________________________ maxim integrated products 1 top view (bumps on bottom) wlp (1.56mm x 2.14mm) v cc gnd no1 no2 + 1 a b c 234 nc2 nc1 cb com2 gnd com1 neg en max14504/ MAX14505/ MAX14505a/ max14506 pin configuration ordering information/selector guide 19-4244; rev 1; 12/08 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 pin-package top mark com signal range for en = v cc clickless max14504 ewc+ 12 wlp aah ? cc no MAX14505 ewc+* 12 wlp aai ? cc yes MAX14505a ewc+ 12 wlp aak 0 to +v cc yes max14506 ewc+* 12 wlp aaj 0 to +v cc no note: all devices are specified over the -40? to +85? temperature range. + denotes a lead(pb)-free/rohs-compliant package. * future product? ontact factory for availability. typical operating circuit appears at end of data sheet.
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = +2.3 to +5.5v, t a = t min to t max, c neg = 3.3nf, unless otherwise noted. typical values are at v cc = +3.0v, t a = +25?, unless otherwise noted.) (note 3) 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. note 1: signals on nc_, no_, and com_ exceeding -v cc or +v cc are clamped by internal diodes. for en v ih signals on nc_, no_, and com_ exceeding 0 or +v cc are clamped by internal diodes (MAX14505a/max14506). limit forward-diode current to maximum current rating. note 2: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a 4-layer board. for detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial . (all voltages referenced to gnd, unless otherwise noted.) v cc ........................................................................-0.3v to +6.0v nc_, no_, com_ (note 1)..................-v cc - 0.3v to v cc + 0.3v nc_, no_, com_ (MAX14505a/max14506, en = v cc ) (note 1) .......................................................-0.3v to v cc + 0.3v cb, en ......................................................................-0.3v to +6v continuous current (nc_, no_, com_).........................?50ma continuous current on shunt switches ..............................?ma peak current (nc_, no_, com_) (pulsed at 1ms, 10% duty cycle)..................................?50ma continuous power dissipation (t a = +70?) for multilayer board: 12-pin wlp (derate 8.5mw/? above +70?) ..............678mw operating temperature range ...........................-40? to +85? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? package junction-to-ambient thermal resistance ( ja ) (note 2)............................................118?/w lead temperature (soldering) .........................................+300? parameter symbol conditions min typ max units analog switch v en = 0 -v cc +v cc (max14504/ MAX14505) -v cc +v cc analog signal range nc_, no_, com_ v en = v cc (MAX14505a/ max14506) 0+v cc v t a = +25? 0.36 0.5 on-resistance r on v cc = +3.0v, i com_ = 50ma, v nc_ , v no_ = -v cc to v cc t a = t min to t max 0.65 ? on-resistance match between channels ? r on v cc = +3.0v, i nc_ = i no_ = 50ma; between nc_ and no_ only 10 m ? on-resistance flatness r flat ( on ) v cc = +3.0v, i nc_ = i no_ = 50ma, v nc_ , v no_ = -v cc to v cc (note 4) 1m ? shunt switch resistance r shunt v no_ = +100mv 15 55 120 ?
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability _______________________________________________________________________________________ 3 parameter symbol conditions min typ max units v cc = +3.0v, switch open; v no_ = -2.5v, +2.5v; v com_ = +2.5v, -2.5v, unconnected (max14504/max14506) -50 +50 nc_ or no_ off-leakage current i nc _ ( of f ) , i no_ ( off ) v cc = +3.0v, switch open; v nc_ = -2.5v, +2.5v; v com_ = +2.5v, -2.5v, unconnected -50 +50 na com_ on-leakage current i com_ ( on ) v c c = + 3.0v , sw i tch cl osed ; v c om _ = + 2.5v , - 2.5v ; v n c _ or v n o_ = + 2.5v , - 2.5v , unconnected -100 +100 na dynamic timing (note 5) turn-on time t on v no_ or v nc_ = 0, r l = 50 ? , figure 1 14 60 ms turn-off time t off v no_ or v nc_ = 0, r l = 50 ? , figure 1 1.5 3 s audio performance total harmonic distortion plus noise thd+n f = 20hz to 20khz, v com_ = 0.5v p-p , r s = r l = 50 ? ; dc bias = 0 0.001 % off-isolation v iso r s = r l = 50 ? ; v com _ = 0.5v p-p , f = 20khz (note 6), figure 2 -84 db crosstalk v ct r s = r l = 50 ? ; v com _ = 0.5v p-p , f = 20khz (note 7), figure 2 -90 db nc_ or no_ off-capacitance c n c _ ( of f ) , c n o _ ( of f ) v nc_/no_ = 0.5v p-p , f = 1mhz; figure 3 65 pf com_ on-capacitance c com _ ( on ) v nc_/no_ = 0.5v p-p , f = 1mhz; figure 3 125 pf logic input (cb, en ) input logic-high v ih 1.4 v input logic-low v il 0.5 v input leakage current i in v cb = v en = 0 or v cc -1 +1 ? electrical characteristics (continued) (v cc = +2.3 to +5.5v, t a = t min to t max, c neg = 3.3nf, unless otherwise noted. typical values are at v cc = +3.0v, t a = +25?, unless otherwise noted.) (note 3)
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability 4 _______________________________________________________________________________________ note 3: all parameters are production tested at t a = +85?, and guaranteed by design over the specified temperature range. note 4: flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. note 5: all timing is measured using 20% and 80% levels. note 6: off-isolation = 20log 10 [v com_ /(v no_ or v nc_ )], v com_ = output, v no_ or v nc_ = input to off switch. note 7: between any two switches. parameter symbol conditions min typ max units power supply power-supply range v cc 2.3 5.5 v power-supply rejection ratio (psrr) r com_ = 50 ? , f = 10khz 78 db v cc = +3.0v, v en = 0, v cb = 0 or v cc 12 23 v cc supply current i cc v cc = +5.5v, v en = 0, v cb = 0 or v cc 21 41 ? v cc = +3.0v, v en = v cc (max14504/MAX14505) 15 v cc = +5.5v, v en = v cc (max14504/MAX14505) 29 v cc = +3.0v, v en = v cc (MAX14505a/max14506) 0.15 v cc shutdown supply current i cc_shdn v cc = +5.5v, v en = v cc (MAX14505a/max14506) 0.2 ? supply current increase with supply voltage i cc_ctrl v cc = 5.5v, v cb = v en = 0.5v or 1.4v 2 5 ? negative charge-pump output v neg c neg = 3.3nf - 1.01v c c -v cc - 0.95v c c v electrical characteristics (continued) (v cc = +2.3 to +5.5v, t a = t min to t max, c neg = 3.3nf, unless otherwise noted. typical values are at v cc = +3.0v, t a = +25?, unless otherwise noted.) (note 3) 0 0.3 0.2 0.1 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -2.30 -1.15 0 1.15 2.30 on-resistance vs. v com max14504 toc01 v com (v) r on ( ? ) v cc = 2.3v t a = +85 c t a = +25 c t a = -40 c 0 0.3 0.2 0.1 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -3 -1 -2 0123 on-resistance vs. v com max14504 toc02 v com (v) r on ( ? ) v cc = 3.0v t a = +85 c t a = +25 c t a = -40 c 0 0.2 0.1 0.5 0.4 0.3 0.6 0.7 0.9 0.8 1.0 -5.5 -3.5 -2.5 -4.5 -1.5 -0.5 0.5 1.5 2.5 3.5 4.5 5.5 on-resistance vs. v com v com (v) r on ( ? ) v cc = 5.5v max14504 toc03 t a = +85 c t a = +25 c t a = -40 c typical operating characteristics (v cc = 3.0v, t a = +25?, unless otherwise noted.)
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability _______________________________________________________________________________________ 5 typical operating characteristics (continued) (v cc = 3.0v, t a = +25?, unless otherwise noted.) 0.3650 0.3645 0.3640 0.3635 0.3630 -3 0 -2 -1 1 2 3 r on flatness vs. v com max14504 toc04 v com (v) r on ( ? ) 20 15 10 5 0 2.3 3.9 3.1 4.7 5.5 nc_/no_ turn-on/turn-off time vs. supply voltage supply voltage (v) t on (ms) 2.0 1.5 1.0 0.5 0 t off ( s) max14504 toc05 t on t off 20 15 10 5 0 -40 -15 10 35 60 85 nc_/no_ turn-on/turn-off time vs. temperature temperature ( c) t on (ms) 2.0 1.5 1.0 0.5 0 t off ( s) max14504 toc06 t on t off 0 5 15 10 20 25 supply current vs. supply voltage max14504 toc07 supply voltage (v) supply current ( a) 2.3 3.9 3.1 4.7 5.5 cb = en = 0 10 14 12 18 16 20 22 -40 85 supply current vs. temperature max14504 toc08 temperature ( c) supply current ( a) 10 -15 35 60 cb = en = 0 v cc = 5.5v v cc = 3.0v 0 0.6 0.4 0.2 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.7 3.0 3.3 3.6 logic-input low threshold vs. supply voltage max14504 toc09 supply voltage (v) logic-input low threshold (v) v ih v il 0 20 60 40 80 100 supply current vs. cb logic level max14504 toc10 cb logic level (v) supply current ( a) 02.2 1.1 3.3 v cc = 5.5v en = 0
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability 6 _______________________________________________________________________________________ typical operating characteristics (continued) (v cc = 3.0v, t a = +25?, unless otherwise noted.) 0 10 100 power-supply rejection ratio vs. frequency 100 40 20 80 60 max14504 toc17 frequency (khz) psrr (db) 0 2 1 4 3 5 6 -40 85 com_ on-leakage current vs. temperature max14504 toc11 temperature ( c) com_ on-leakage current (na) 10 -15 35 60 v com_ = 2.5v v nc_ /v no_ = unconnected 0 100 50 150 250 300 200 -40 85 nc_/no_ off-leakage current vs. temperature max14504 toc12 temperature ( c) nc_/no_ off-leakage current (pa) 10 -15 35 60 v nc_ /v no_ = 2.5v v com_ = unconnected on-loss vs. frequency frequency (mhz) 0.001 1 10 100 0.01 0.1 1000 on-loss (db) 0 -1 -2 -3 -4 -5 -6 max14504 toc13 off-isolation vs. frequency frequency (mhz) 0.001 1 10 100 0.01 0.1 1000 off-isolation (db) 0 -20 -40 -60 -80 -100 max14504 toc14 crosstalk vs. frequency frequency (mhz) 0.001 1 10 100 0.01 0.1 1000 crosstalk (db) 0 -20 -40 -60 -80 -100 max14504 toc15 1 0.0001 0.01 0.1 10 100 total harmonic distortion plus noise vs. frequency 0.001 0.01 0.1 max14504 toc16 frequency (khz) thd+n (%) 1
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability _______________________________________________________________________________________ 7 test circuits/timing diagrams t r < 5ns t f < 5ns 50% v il logic input r l v cc gnd neg v cc v out = v in_ ( r on ) r on + r l v n_ = 0v v n_ = v no_ or v nc_ v ih t off 0v no_ or nc_ v ref = 1.5v 0.8 x v 0ut 0.2 x v out t on v out switch output logic input v out cb or en max14504/ MAX14505/ MAX14505a/ max14506 c neg figure 1. switching time v cc gnd neg v cc c neg com1 no1* measurements are standardized against shorts at ic terminals. off-isolation is measured between com_ and off. no_ or nc_ terminal on each crosstalk is measured from one channel to the other channel. signal direction through switch is reversed; worst values are recorded. *for crosstalk, this pin is no2. nc2 and com2 are open. nc1 0.1 f v in v out network analyzer 50 ? 50 ? 50 ? 50 ? 50 ? meas ref max14504/ MAX14505/ MAX14505a/ max14506 cb 0v or v cc off-isolation = 20log crosstalk = 20log v in v out ( ) v in v out ( ) figure 2. off-isolation and crosstalk
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability 8 _______________________________________________________________________________________ test circuits/timing diagrams (continued) pin description pin name function a1 no2 analog switch 2, normally open terminal a2 neg negative supply voltage output. connect neg to gnd with a 3.3nf capacitor. do not use neg to power any external circuitry. a3 v cc positive supply voltage input. connect v cc to a +2.3v to +5.5v supply voltage. bypass v cc to gnd with a 0.1? ceramic capacitor placed as close as possible to the device. a4 no1 analog switch 1, normally open terminal b1 com2 analog switch 2, common terminal b2 en active-low enable input. drive en high to put switches in a high-impedance mode. shunt click/pop switches are not affected by the state of en . the MAX14505a/max14506 enter a low current state when en is driven high. b3, c3 gnd ground b4 com1 analog switch 1, common terminal c1 nc2 analog switch 2, normally closed terminal c2 cb control bit input. cb controls switch 1 and switch 2. see the functional diagram/truth table . c4 nc1 analog switch 1, normally closed terminal gnd v il or v ih nc_ or no_ com_ max14504/ MAX14505/ MAX14505a/ max14506 v cc v cc capacitance meter cb neg 0.1 f f = 1mhz c neg figure 3. channel off-/on-capacitance
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability _______________________________________________________________________________________ 9 detailed description the max14504/MAX14505/MAX14505a/max14506 are low on-resistance, low-voltage, dual spdt analog switches that operate from a +2.3v to +5.5v single supply. these devices feature a negative signal capa- bility that allows signals as low as -v cc to pass through without distortion. the max14504/MAX14505/MAX14505a/max14506 have an enable input en to put the switches in a high- impedance mode. when en = v cc , the max14504/ MAX14505 terminals have a signal range of -v cc to +v cc . the MAX14505a/max14506 terminals have a sig- nal range of 0 to +v cc . the MAX14505a/max14506 fea- ture a low supply current when en = v cc . the MAX14505/MAX14505a have internal shunt switch- es on both no1 and no2 terminals to suppress click- and-pop sounds that can occur when switching audio signals between precharged points. functional diagram/truth table max14504/ max14506 nc1 com1 v cc nc2 no1 com2 no2 nc1 nc2 no1 no2 neg cb en gnd c neg neg c neg com1 com2 MAX14505/ MAX14505a v cc cb en gnd on off shunt switch (MAX14505/MAX14505a) x x en 0 1 cb x = don't care. high impedance on off com_ to nc_ high impedance off on com_ to no_ 1 0 0 x 0 1 cb x = don't care. en
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability 10 ______________________________________________________________________________________ digital control inputs the max14504/MAX14505/MAX14505a/max14506 logic inputs accept up to +5.5v, regardless of supply voltage. for example, with a +3.3v supply, cb and en can be driven low to gnd and high to +5.5v, allowing for mixed logic levels in a system. using logic levels of v il = 0 to v ih v cc reduces supply current. analog signal levels these devices pass signals from -v cc to +v cc with minimal distortion and very little change in on-resistance (see the typical operating characteristics ). the switch- es are bidirectional; therefore, the no_, nc_, and com_ terminals can be used as either inputs or outputs. click-and-pop suppression the MAX14505/MAX14505a have a shunt switch on no1 and no2 terminals to automatically discharge any capacitance when they are not connected to com1 and com2. the shunt switch reduces audible click- and-pop sounds that occur when switching between capacitively coupled audio sources. audible clicks and pops are caused when a step dc voltage is switched into the speaker. the dc step transients are reduced by automatically discharging the side that is not con- nected to the com terminal, reducing any residual dc voltage and reducing clicks and pops. applications information power-supply sequencing proper power-supply sequencing is recommended for all cmos devices. improper supply sequencing can force the switch into latch-up, causing it to draw exces- sive supply current. the only way out of latch-up is to remove all signals and power and then reapply properly. connect all ground pins first, apply power to v cc , and finally apply signals to no_, nc_, and com_. follow the reverse order upon power-down.
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability ______________________________________________________________________________________ 11 typical operating circuit max14504/max14506 nc1 com1 v cc nc2 no1 com2 no2 neg cb en gnd c neg max9788 class g audio amplifier class d audio amplifier MAX14505/MAX14505a nc1 com1 nc2 no1 com2 no2 neg cb en gnd c neg max9722 directdrive ? amplifier audio amplifier 0.1 f v cc 0.1 f package information for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . package type package code document no. 12 wlp w121a2-1 21-0009 chip information process: cmos directdrive is a registered trademark of maxim integrated products, inc.
max14504/MAX14505/MAX14505a/max14506 dual spdt negative rail analog switches with v cc capability 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 maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 0 8/08 initial release ? 1 12/08 changed pin configuration and pin description sections 1, 8, 11

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