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functional diagrams/truth tables 19-6051; rev 1; 8/12 general description the MAX14759/max14761/max14763 analog switches are capable of passing bipolar signals that are beyond their supply rails. these devices operate from a single +3.0v to +5.5v supply and support signals in the -25v to +25v range. the MAX14759 is a single-pole/single-throw (spst) ana - log switch, while the max14761 is a dual-spst analog switch. the max14763 is a single-pole/double-throw (spdt) analog switch. the MAX14759 features 1 i (max) on-resistance with a q 200na (max) on-leakage current. the max14761/ max14763 feature 2 i (max) on-resistance with a q 100na (max) on-leakage current. the low on-resistance and high bandwidth allow use in digital- and analog-signal switching applications. the MAX14759/max14763 are available in an 8-pin (3mm x 3mm) tdfn package. the max14761 is avail - able in a 10-pin (3mm x 3mm) tdfn package. these devices are specified over the -40 n c to +85 n c extended temperature range. benefits and features s simplify power-supply requirements ? +3.0v to +5.5v supply range ? -25v to +25v signal range s high performance ? low 1 i (max) or 2 i (max) on-resistance ? low 2.4m i (typ) and 5.1m i (typ) r on flatness ? 500ma (max) switch current for MAX14759 ? thermal shutdown protection ? -40 n c to +85 n c operating temperature range ? high bandwidth: 100mhz (typ) insertion loss ? high-esd protection up to 2kv s save board space ? small 8-pin and 10-pin tdfn packages applications industrial measurement systems instrumentation systems rs-485 termination switching can bus termination switching opto-relay replacement medical systems ate systems audio signal routing and switching ordering information/selector guide appears at end of data sheet. for related parts and recommended products to use with this part, refer to www.maximintegrated.com/MAX14759.related . MAX14759 supply generation v p ab en gnd v n v cc max14761 supply generation v p gnd v n v cc a1 b1 en1 a2 b2 en2 max14763 supply generation v p gnd v n v cc a1 com a2 sel en a open closed 0 1 sel a1 a2 closed open open closed 0 1 en1 a1 closed open 0 1 en2 a2 open closed 0 1 MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxims website at www.maximintegrated.com.
2 (all voltages referenced to gnd, unless otherwise noted.) v cc .......................................................................... -0.3v to +6v en, en1, en2, sel ............................... -0.3v to + (v cc + 0.3v) a, b, a1, a2, b1, b2, com .................... (v n - 0.3v) to lesser of (v p + 0.3v) or (v n + 52v) v p .................................................................... -0.3v to lesser of (+52v) or (v n + 70v) v n ........................ greater of (v cc - 40v) or (v p - 70v) to +0.3v v p to v n ................................................................. -0.3v to +70v continuous current through switch (MAX14759) ........ q 500ma continuous current through switch (max14761, max14763) ........................................... q 250ma continuous power dissipation (t a = +70 n c) 8-pin tdfn package (derate 24.4mw/ n c above +70 n c) ......................... 1951.2mw 10-pin tdfn package (derate 24.4mw/ n c above +70 n c) ......................... 1951.2mw operating temperature range .......................... -40 n c to +85 n c storage temperature range ............................ -65 n c to +160 n c lead temperature (soldering, 10s) ................................ +300 n c soldering temperature (reflow) ...................................... +260 n c 8-pin tdfn junction-to-ambient thermal resistance ( q ja ) .......... 48c/w junction-to-case thermal resistance ( q jc ) ................. 8c/w 10-pin tdfn junction-to-ambient thermal resistance ( q ja ) .......... 41c/w junction-to-case thermal resistance ( q jc ) ................. 9c/w absolute maximum ratings note 1: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional opera - tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. package thermal characteristics (note 1) electrical characteristics (v cc = +3.0v to +5.5v, t a = -40 c to +85 c, unless otherwise noted. typical values are at v cc = 5v and t a = +25 c.) (note 2) parameter symbol conditions min typ max units dc characteristics power supply range v cc 3.0 5.5 v continuous current through switch i a_ (MAX14759) -500 +500 ma (max14761/max14763) -250 +250 supply current i cc v cc 4.7v v en_ = v cc 4.1 10 ma v en_ = v cc /2 4.1 10 v cc > 4.7v v en_ = v cc 2.5 6 v en_ = v cc /2 2.5 6 analog-signal range v com , v a_ , v b_ switch open or closed -25 +25 v on-resistance r on i b = q 500ma, v a = q 25v (MAX14759) 0.6 1 i i com or i b_ = q 250ma, v a _ = q 25v (max14761/max14763) 1.2 2 on-resistance flatness d r on -25v < v a < +25v, i b = q 500ma (MAX14759) 2.4 m i -25v < v a_ < +25v, i b_ or i com = q 250ma (max14761/max14763) 5.1 a, a1, a2 off-leakage current i a_(off) v a = +25v, v b = 0v, figure 1 (MAX14759) -250 +250 na v a_ = +25v, v com or v b_ = 0v, figure 1 (max14761/max14763) -250 +250 com, b, b1, b2 off-leakage current i com(off) , i b_(off) v com or v b = 15v, v a_ = 0v, figure 1 (MAX14759/max14763) -100 +100 na v b_ = 15v, v a_ = 0v, figure 1 (max14761) -100 +100 maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
3 note 2: all devices are 100% production tested at t a = +25 n c. specifications over operating temperature range are guaranteed by design. note 3: the power-on time is defined as the settling time for the charge pumps output to reach steady-state value within 1%. electrical characteristics (continued) (v cc = +3.0v to +5.5v, t a = -40 c to +85 c, unless otherwise noted. typical values are at v cc = 5v and t a = +25 c.) (note 2) parameter symbol conditions min typ max units on-leakage current i on v a = 25v, b1, b2, or com are unconnected, figure 1 (MAX14759) -200 +200 na v a = 25v, b1, b2, or com are unconnected, figure 1 (max14761) -100 +100 v a = 25v, b1, b2, or com are unconnected, figure 1 (max14763) -250 +250 digital logic input-voltage low v il v cc = 3.0v 0.7 v v cc = 3.6v 0.7 v cc = 4.5v 0.8 v cc = 5.5v 0.8 input-voltage high v ih v cc = 3.0v 1.7 v v cc = 3.6v 1.9 v cc = 4.5v 2.0 v cc = 5.5v 2.1 input current i l -1 +1 a ac characteristics power-on time t pwron c vp = c vn = 100nf (note 3) 50 ms enable turn-on time t on v a_ = q 10v, r l = 10k i , figure 2 (MAX14759/ max14761) 152 300 f s v a_ = q 10v, r l = 10k i , figure 2 (max14763) 1.12 1.8 ms enable turn-off time t off v a_ = q 10v, r l = 10k i , figure 2 300 1000 f s break-before-make interval t bbm v a_ = 1v rms , r l = 10k i , figure 3 (max14763) 740 f s off-isolation v iso v a_ = 1v rms , f = 100khz, r l = 50 i , c l = 15pf, figure 4 -77 db crosstalk v ct r s = r l = 50 i , f = 100khz, v com = 1v rms , figure 5 (max14763) -83 db -3db bandwidth bw r s = 50 i , r l = 50 i , v a_ = 1v p-p , figure 6 100 mhz total harmonic distortion plus noise thd+n r s = r l = 1k i , f = 20hz to 20khz 0.0012 % charge injection q v a_ = gnd, c l = 1nf, figure 7 1370 pc input capacitance c in at a, a1, a2, b, b1, b2, and com pins 58 pf thermal protection thermal shutdown temperature t hyst +154 n c shutdown temperature hysteresis t shut 24 n c esd protection all pins human body model q 2 kv maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
4 figure 1. leakage current measurement figure 2. switching time test circuits/timing diagrams MAX14759 max14761 max14763 a_ en_ /sel b_ /com gnd +5v v cc 1f a a MAX14759 max14761 max14763 a_ en_ /sel b_ /com unconnected gnd +5v v cc 1f a switch open switch closed on-leakage current off-leakage current 50% logic input switch output (v out ) 0 50% 0.9 x v out 0.1 x v out MAX14759 max14761 max14763 a_ +10v en_ /sel b_ /com v out r l gnd logic input +5v v cc 1f t on t off maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
5 figure 3. break-before-make figure 4. off-isolation test circuits/timing diagrams (continued) 50% logic input +5v switch output (v out ) 0v 0.8 x v out t bbm max14763 a2 +10v a1 sel com c l v out r l 10ki gnd logic input c l includes fixture and stray capacitance. +5v v cc 1f MAX14759 max14761 max14763 a_ en_ /sel b_ /com r l c l analyzer gnd switch open signal generator +5v v cc 1f v b_ /com v a_ off-isolation = 20log maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
6 figure 5. crosstalk figure 6. insertion loss test circuits/timing diagrams (continued) max14763 com a2 a1 r l c l analyzer signal generator +5v v cc 1f gnd sel 50i v com v a2 crosstalk = 20log MAX14759 max14761 max14763 gnd a_ b_ /com +5v v cc r l r l r s r s meas network analyzer v out ref v in en_ /sel +5v v out v in on-loss = 20log 1f v in maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
7 figure 7. charge injection test circuits/timing diagrams (continued) typical operating characteristics (t a = +25c, unless otherwise noted.) dv out on off q = c l x dv out off logic input switch output (v out ) +5v 0v MAX14759 max14761 max14763 a_ en_ /sel logic input b_ /com c l = 1nf v out gnd +5v v cc 1f on-resistance vs. v b_ / com MAX14759 toc01 v b_ / com (v) r on (i) 20 15 5 10 -15 -10 -5 0 -20 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.2 -25 25 v cc = 3.3v, i b_ = 250ma (max14761), i b = 500ma (MAX14759) max14761 MAX14759 on-resistance vs. v com MAX14759 toc02 v com (v) r on (i) 20 15 5 10 -15 -10 -5 0 -20 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.2 -25 25 v cc = 5v, i b_ = 250ma (max14761), i b = 500ma (MAX14759) max14761 MAX14759 on-resistance vs. temperature (MAX14759) MAX14759 toc03 v com (v) r on (i) 20 15 10 5 0 -5 -10 -15 -20 0.3 0.6 0.9 1.2 v cc = 5v, i b = 500ma 1.6 1.8 0 -25 25 t a = +85c t a = -40c t a = +25c maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
8 typical operating characteristics (continued) (t a = +25c, unless otherwise noted.) charge injection vs. v b MAX14759 toc07 v b (v) charge injection (pc) 20 15 -20 -15 -10 0 5 -5 10 200 400 600 800 1000 1200 1400 1600 0 -25 25 MAX14759 t a = +85c t a = +25c t a = -40c crosstalk vs. frequency MAX14759 toc09 frequency (mhz) crosstalk (db) 10 1 0.1 -80 -60 -40 -20 0 -100 0.01 100 supply current vs. temperature MAX14759 toc08 temperature (c) supply current (ma) 60 35 10 -15 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 v en = v cc (MAX14759) 0 -40 85 off-isolation vs. frequency MAX14759 toc10 frequency (mhz) off-isolation (db) 10 1 0.1 -80 -60 -40 -20 0 -100 0.01 100 on-resistance vs. v com (max14761) MAX14759 toc04 v com (v) r on (i) 20 15 5 10 -15 -10 -5 0 -20 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 0 -25 25 v cc = 5v, i b_ = 250ma t a = +85c t a = -40c t a = +25c leakage current vs. temperature (MAX14759) MAX14759 toc05 temperature (c) leakage current (na) 60 35 10 -15 20 40 60 80 100 0 -40 85 on-leakage off-leakage leakage current vs. temperature (max14761) MAX14759 toc06 temperature (c) leakage current (na) 60 35 10 -15 11 21 31 41 51 1 -40 85 on-leakage off-leakage maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
9 typical operating characteristics (continued) (t a = +25c, unless otherwise noted.) insertion loss vs. frequency MAX14759 toc11 frequency (mhz) insertion loss (db) 100 10 1 0.1 -16 -12 -8 -4 0 -20 0.01 1000 MAX14759, r l = 50i thd+n vs. frequency MAX14759 toc12 frequency (khz) thd+n (%) 10 1 0.1 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.016 0.018 0.020 0 0.01 100 psrr vs. frequency MAX14759 toc13 frequency (khz) psrr (db) 10 1 0.1 -80 -60 -40 -20 0 -100 0.01 100 max14761 charge-pump noise (switches disabled) MAX14759 toc15 frequency (mhz) magnitude (dbm) 90 80 70 60 50 40 30 20 -100 -80 -60 -40 -20 0 -120 10 100 turn-on /off time vs. v b_ /c om MAX14759 toc14 turn-on /off time (s) 100 200 300 400 500 0 v b_ / com (v) 20 15 51 0 -15 -10 -5 0 -20 -25 25 MAX14759 t off t on max14761 charge-pump noise (switch enabled) MAX14759 toc16 frequency (mhz) magnitude (dbm) 90 80 70 60 50 40 30 20 -100 -80 -60 -40 -20 0 -120 10 100 maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
10 pin description pin configurations pin name function MAX14759 max14761 max14763 1 1 1 v cc positive-supply voltage input. bypass v cc to gnd with a 1 ff ceramic capacitor placed as close as possible to the device. 2 2 2 gnd ground 3 4 3 v n negative voltage output. bypass v n to gnd with a 0.1 ff, 50v ceramic capacitor placed as close as possible to the device. 4 b analog switch common terminal 4 com analog switch common terminal 5 a analog switch normally open terminal 6 7 6 v p positive voltage output. bypass v p to gnd with a 0.1 ff, 50v ceramic capacitor placed as close as possible to the device. 7 n.c. no connection. leave unconnected. 8 en switch control input. drive en high to close the switch or drive en low to open the switch. 8 7 a1 analog switch 1 normally closed terminal tdfn *connect exposed pad (ep) to v n . max14763 top view *ep 13 4 10 8 7 en 1 a1 v p max14761 2 9 en 2 5 + 6 a2 v cc b1 v n gnd b2 *ep 13 4 + 86 5 sel v p a2 2 7 a1 v cc v n com gnd MAX14759 *ep 13 4 + 86 5 en v p a 2 7 n.c. v cc v n b gnd maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
11 pin description (continued) detailed description the MAX14759/max14761/max14763 are analog switches capable of handling signals above and below their rails. these devices operate from a single +3.0v to +5.5v sup - ply and support signals in the -25v to +25v range. the low on-resistance and high bandwidth allow for use in digital- and analog-signal switching applications. integrated bias generation the MAX14759/max14761/max14763 contain a total of three charge pumps to generate bias voltages for the internal switches: a 5v regulated charge pump, a posi - tive high-voltage (+35v) charge pump, and a negative high-voltage (-27v) charge pump. when v dd is above 4.7v (typ), the 5v regulated charge pump is bypassed, and v dd provides the input for the high-voltage charge pumps, reducing overall supply current. an external 0.1f capacitor is required for each high-voltage charge pump between v p /v n and gnd. analog signal range the devices switch signals in the range from -25v to +25v that are above and below their rails. the on-resistance for these devices exhibit a high degree of flatness of 2.4m i (MAX14759 typ) and 5.1m i (max14761/max14763 typ) over the whole input voltage range of -25v to +25v. the analog switches allow bidirectional current flow, so a, a1, a2, b, b1, b2, and com can be used as either inputs or outputs. bypass capacitors bias stabilizing capacitors are required on the v p and v n pins. 1 f f ceramic capacitors are suggested for effective operation. v p and v n are not intended as a power supply for other circuitry. applications information nonpowered condition the MAX14759/max14761/max14763 can tolerate input voltages on the a, b, or com pins in the 25v range when it is not powered. when v dd = 0v, the dc input leakage current into the a, b, or com pins is typically below 1a. some devices can have a larger leakage current up to the ma range due to technology spread. with v dd not powered, internal diodes between the analog pins and the v p and v n charge up the external capacitors on v p and v n when positive and/or negative voltages are applied to these pins. this causes transient input current flow. large dv/dt on the inputs causes large capacitive charg - ing currents, which have to be limited to 300ma to avoid destroying the internal diodes. hence, the 100nf capaci - tors on v p and v n , the dv/dt must be limited to 3v/s. once the capacitors reach their final voltage, the input current decays to the leakage current levels mentioned above. pin name function MAX14759 max14761 max14763 3 b1 analog switch 1 common terminal 6 5 a2 analog switch 2 normally open terminal 5 b2 analog switch 2 common terminal 10 en1 switch 1 control input. drive en1 high to open switch 1 or drive en1 low to close switch 1. 9 en2 switch 2 control input. drive en2 high to close switch 2 or drive en2 low to open switch 2. 8 sel switch control input. drive sel low to connect the com terminal to a1 or drive sel high to connect the com terminal to a2. ep exposed pad. connect ep to v n . ep is not intended as an electrical connection. maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
12 figure 8. rs-485 termination switch figure 9. can termination switch differential termination resistor switch the MAX14759 can be used to switch a differential termi - nation resistor in or out. in rs-485 and can applications, both ends of high-speed transmission lines require ter - mination. figures 8 and 9 show an application of rs-485 and can termination using two equal resistors. these switches support rs-485s high -7v to +12v common- mode range. in rs-232/rs-485 multiprotocol applications, the MAX14759 can be used for switching in the line-termi - nating resistors for rs-485 usage, and can disable the termination resistor for rs-232 operation, as shown in figure 10 . the max14761 is ideal for switching in fail-safe biasing resistors in rs-485 applications, as shown in figures 11 and 12 . audio amplifier switch the max14763 is used for selecting between audio amplifier sources to drive loudspeaker applications ( figures 13 and 14 .) gnd a v cc r t /2 en a b r t /2 max14840 MAX14759 termination control r t /2 a b r t /2 ctrl canh canl r t /2 a b r t /2 MAX14759 max3051 MAX14759 ctrl en en max3051 maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
13 figure 11. pullup and pulldown resistance switch figure 10. multiprotocol termination switch a2 r pd r pu r t en2 b2 en1 b1 a1 max14761 control rs-485 transceiver v cc rs-485/ rs-232 gnd v cc a b r t /2 a b en r t /2 max3160 MAX14759 control maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
14 figure 13. single-ended amplifier switching figure 14. differential amplifier switching figure 12. fail-safe biasing network switch com control a1 a2 sel max14763 audio amplifier 2 audio amplifier 1 com control com a1 a2 sel a1 a2 sel max14763 max14763 audio amplifier 1 audio amplifier 2 max14761 control rs-485 transceiver gnd v cc v cc r pu r t r pd b2 a2 en1 en2 a1 b1 maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
15 ordering information/selector guide + denotes a lead(pb)-free/rohs-compliant package. * ep = exposed pad. chip information process: bicmos package information for the latest package outline information and land patterns (foot - prints), go to www.maximintegrated.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 the package regardless of rohs status. part temp range pin-package function r on (max) ( i ) MAX14759 eta+ -40 n c to +85 n c 8 tdfn-ep* 1 x spst 1 max14761 etb+ -40 n c to +85 n c 10 tdfn-ep* 2 x spst 2 max14763 eta+ -40 n c to +85 n c 8 tdfn-ep* 1 x spdt 2 package type package code outline no. land pattern no. 8 tdfn t833+2 21-0137 90-0059 10 tdfn t1033+1 21-0137 90-0003 maxim integrated MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches
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. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated 160 rio robles, san jose, ca 95134 usa 1-408-601-1000 16 ? 2012 maxim integrated the maxim logo and maxim integrated are trademarks of maxim integrated products, inc. revision history revision number revision date description pages changed 0 9/11 initial release 1 8/12 updated electrical characteristics table, updated figures 1C7, added switch enabled and switch disabled figures, updated pin configuration table, added integrated bias generation and nonpowered condition sections 3C7, 9C11 MAX14759/max14761/max14763 above- and below-the-rails low on-resistance analog switches

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