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general description the max4850/max4850h/max4852/max4852h family of dual spdt (single-pole/double-throw) switches oper- ate from a single +2v to +5.5v supply and can handle signals greater than the supply rail. these switches fea- ture low 3.5 ? or 3.5 ? /7 ? on-resistance with low on- capacitance, making them ideal for switching audio and data signals. the max4850/max4850h are configured with two spdt switches and feature two comparators for head- phone detection or mute/send key functions. the max4852 has two spdt switches with no comparators for low 1? supply current. for over-rail applications, these devices offer either the pass-through or high-impedance option. for the max4850/max4852, the signal (up to 5.5v) passes through the switch without distortion even when the posi- tive supply rail is exceeded. for the max4850h/ max4852h, the switch input becomes high impedance when the input signal exceeds the supply rail. the max4850/max4850h/max4852/max4852h are available in the space-saving (3mm x 3mm), 16-pin tqfn package and operate over the extended temper- ature range of -40? to +85?. applications usb switching audio-signal routing cellular phones notebook computers pdas and other handheld devices features usb 2.0 full speed (12mb) and usb 1.1 signal switching compliant switch signals greater than v cc 0.1ns differential skew 3.5 ? /7 ? on-resistance 135mhz -3db bandwidth +2v to +5.5v supply range 1.8v logic compatible low supply current 1a (max4852) 5a (max4850) 10a (max4850h/max4852h) available in a space-saving (3mm x 3mm), 16-pin tqfn package max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling ________________________________________________________________ maxim integrated products 1 ordering information v cc 3 max4850 max4850h nc1 no1 nc2 no2 cout2 com1 in1 in2 com2 cin2 v cc 3 cout1 cin1 max4852 max4852h nc1 no1 nc2 no2 com1 in1 in2 com2 max4850_ max4852_ in_ no_ nc_ 0 off on 1 on off switches shown for logic 0 input 3.5 ? 3.5 ? 7 ? 3.5 ? 3.5 ? 7 ? block diagrams/truth table 19-3375; rev 0; 7/04 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. * ep = exposed paddle. part temp range pin-package top mark max4850 ete -40 c to +85 c 16 tqfn-ep* abu max4850h ete -40 c to +85 c 16 tqfn-ep* abv max4852 ete -40 c to +85 c 16 tqfn-ep* abz max4852h ete -40 c to +85 c 16 tqfn-ep* aca pin configurations and selector guide appear at end of data sheet.
dual spdt analog switches with over-rail signal handling 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = +2.7v to +5.5v, t a = -40 c to +85 c, unless otherwise noted. typical values are at v cc = +3.0v, t a = +25 c, unless other- wise noted.) (note 2) 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. v cc , in_, cin_, com_, no_, nc_ to gnd (note 1).........................................-0.3v to +6.0v cout_........................................................-0.3v to (v cc + 0.3v) cout_ continuous current..............................................20ma closed switch continuous current com_, no_, nc_ 3.5 ? switch ................................................................100ma 7 ? switch .....................................................................50ma peak current com_, no_, nc_ (pulsed at 1ms, 50% duty cycle) 3.5 ? switch ................................................................200ma 7 ? switch ...................................................................100ma peak current com_, no_, nc_ (pulsed at 1ms, 10% duty cycle) 3.5 ? switch ................................................................240ma 7 ? switch ...................................................................120ma continuous power dissipation (t a = +70 c) 16-pin tqfn (derate 20.8mw/ c above +70 c) ...........1667mw 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 max4850/max4850h/max4852/max4852h note 1: signals on in, no, nc, or com below gnd are clamped by internal diodes. limit forward-diode current to maximum current rating. parameter symbol conditions min typ max units supply voltage v cc 2.0 5.5 v max4850 5 10 max4850h/ max4852h 10 20 supply current i cc v cc = 5.5v, v in_ = 0v or v cc max4852 1 a analog switch (3.5 ? switch) analog signal range v no_ , v nc_ , v com_ 0 5.5 v t a = +25 c 3.5 4.5 on-resistance (note 3) r on v cc = 3v, i com_ = 10ma, v nc_ or v no_ = 0 to 5.5v (max485_) or v cc (max485_h) t a = -40 c to +85 c 5 ? c 0.1 0.2 on-resistance match between channels (notes 3, 4) ? r on v cc = 3v, i com = 10ma, v nc_ or v no_ = 1.5v t a = -40 c to +85 c 0.25 ? c 1.2 1.8 on-resistance flatness (note 5) r flat v cc = 3v, i com_ = 10ma, v nc_ or v no_ = 1v, 2v, 3v t a = -40 c to +85 c 2 ? c -2 +2 no_/nc_ off-leakage current i off v cc = 5.5v, v nc_ or v no_ = 1v or 4.5v, v com_ = 4.5v or 1v t a = -40 c to +85 c -10 +10 na t a = +25 c -2 +2 com_ on-leakage current i on v cc = 5.5v; v nc_ or v no_ = 1v, 4.5v, or floating; v com_ = 1v, 4.5v, or floating t a = -40 c to +85 c -12.5 +12.5 na -3db bandwidth bw signal = 0dbm, r l = 50 ? , c l = 5pf (figure 5) 100 mhz no_/nc_ off-capacitance c off f = 1mhz (figure 6) 20 pf
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling _______________________________________________________________________________________ 3 electrical characteristics (continued) (v cc = +2.7v to +5.5v, t a = -40 c to +85 c, unless otherwise noted. typical values are at v cc = +3.0v, t a = +25 c, unless other- wise noted.) (note 2) parameter symbol conditions min typ max units com on-capacitance c on f = 1mhz (figure 6) 60 pf analog switch (7 ? switch) analog signal range v no_ , v nc_ , v com_ 0 5.5 v t a = +25 c 79 on-resistance r on v cc = 3v, i com_ = 10ma, v nc_ or v no_ = 0 to 5.5v (max4852) or v cc (max4852h) t a = -40 c to +85 c 10 ? c 0.2 0.4 on-resistance match between channels (notes 3, 4) ? r on v cc = 3v, i com = 10ma, v nc_ or v no_ = 1.5v t a = -40 c to +85 c 0.5 ? c 2.5 3.75 on-resistance flatness (note 5) r flat v cc = 3v, i com_ = 10ma, v nc_ or v no_ = 1v, 2v, 3v t a = -40 c to +85 c 4.0 ? c -2 +2 no_/nc_ off-leakage current i off v cc = 5.5v, v nc_ or v no_ = 1v or 4.5v, v com_ = 4.5v or 1v t a = -40 c to +85 c -10 +10 na t a = +25 c -2 +2 com_ on-leakage current i on v cc = 5.5v; v nc_ or v no_ = 1v, 4.5v, or floating; v com_ = 1v, 4.5v, or floating t a = -40 c to +85 c -12.5 +12.5 na -3db bandwidth bw signal = 0dbm, r l = 50 ? , c l = 5pf (figure 5) 135 mhz no_/nc_ off-capacitance c off f = 1mhz (figure 6) 12 pf com on-capacitance c on f = 1mhz (figure 6) 50 pf dynamic characteristics signal over-rail to high-z switching time t hiz max4850h/max4852h, v no_ or v nc_ = v cc to (v cc + 0.5v), v cc < 5v (figure 1) 0.5 1 s high-z to low-z switching time t hizb max4850h/max4852h, v no_ or v nc_ = (v cc + 0.5v) to v cc , v cc < 5v (figure 1) 0.5 1 s skew (note 3) t skew r s = 39 ? , c l = 50pf (figure 2) 0.1 1 ns propagation delay (note 3) t pd r s = 39 ? , c l = 50pf (figure 2) 0.9 2 ns t a = +25 c 40 60 turn-on time t on v cc = 3v, v no_ or v nc_ = 1.5v, r l = 300 ? , c l = 50pf (figure 1) t a = -40 c to +85 c 100 ns t a = +25 c 30 40 turn-off time t off v cc = 3v, v no_ or v nc_ = 1.5v, r l = 300 ? , c l = 50pf (figure 1) t a = -40 c to +85 c 60 ns
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling 4 _______________________________________________________________________________________ electrical characteristics (continued) (v cc = +2.7v to +5.5v, t a = -40 c to +85 c, unless otherwise noted. typical values are at v cc = +3.0v, t a = +25 c, unless other- wise noted.) (note 2) parameter symbol conditions min typ max units t a = +25 c 15 break-before-make time delay (note 3) t d v cc = 3v, v no_ or v nc_ = 1.5v, r l = 300 ? , c l = 50pf (figure 3) t a = -40 c to +85 c 2 ns charge injection q v com_ = 1.5v, r s = 0 ? , c l = 1nf (figure 4) 8 pc off-isolation (note 6) v iso f = 100khz, v com_ = 1v rms , r l = 50 ? , c l = 5pf (figure 5) -80 db crosstalk v ct f = 1mhz, v com_ = 1v rms , r l = 50 ? , c l = 5pf (figure 5) -95 db total harmonic distortion thd f = 20hz to 20khz, v com_ = 1v + 2v p-p , r l = 600 ? digital i/o (in_) v cc = 2v to 3.6v 1.4 input-logic high voltage v ih v cc = 3.6v to 5.5v 1.8 v v cc = 2v to 3.6v 0.5 input-logic low voltage v il v cc = 3.6v to 5.5v 0.8 v input leakage current i in v in_ = 0 or 5.5v -0.5 +0.5 a comparator comparator range 0 5.5 v comparator threshold v th v cc = 2v to 5.5v, falling input 0.3 x v cc 0.33 x v cc 0.36 x v cc v comparator hysteresis v cc = 2v to 5.5v 50 mv comparator output high voltage i source = 1ma v cc - 0.4v v comparator output low voltage i sink = 1ma 0.4 v rising input (figure 7) 2.5 comparator switching time falling input (figure 7) 0.5 s note 2: specifications are 100% tested at t a = +85 c only, and guaranteed by design and characterization over the specified temperature range. note 3: guaranteed by design and characterization; not production tested. note 4: ? r on = r on(max) - r on(min) . note 5: flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. note 6: off-isolation = 20log 10 (v com_ / v no_ ), v com_ = output, v no_ = input to off switch.
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling _______________________________________________________________________________________ 5 max4850/max4852 on-resistance vs. com voltage max4850 toc01 com voltage (v) on-resistance ( ? ) 4 2 1 2 3 4 5 6 7 8 9 10 0 06 3.5 ? switch v cc = 1.8v v cc = 2.0v v cc = 2.3v v cc = 2.5v v cc = 3.0v v cc = 5.0v max4850/max4852 on-resistance vs. com voltage max4850 toc02 com voltage (v) on-resistance ( ? ) 4 2 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0.5 06 v cc = 3.0v 3.5 ? switch t a = +85 c t a = +25 c t a = -40 c max4850/max4852 on-resistance vs. com voltage max4850 toc03 com voltage (v) on-resistance ( ? ) 4 2 1.0 1.5 2.0 2.5 3.0 3.5 0.5 06 v cc = 5.0v 3.5 ? switch t a = +85 c t a = +25 c t a = -40 c max4850h/max4852h on-resistance vs. com voltage max4850 toc04 com voltage (v) on-resistance ( ? ) 4 2 1 2 3 4 5 6 7 8 9 10 0 06 v cc = 1.8v 3.5 ? switch v cc = 2.0v v cc = 2.3v v cc = 2.5v v cc = 3.0v v cc = 5.0v max4850h/max4852h on-resistance vs. com voltage max4850 toc05 com voltage (v) on-resistance ( ? ) 2.5 2.0 0.5 1.0 1.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 1.0 0 3.0 v cc = 3.0v 3.5 ? switch t a = +85 c t a = +25 c t a = -40 c max4850h/max4852h on-resistance vs. com voltage max4850 toc06 com voltage (v) on-resistance ( ? ) 4 3 2 1 1.0 1.5 2.0 2.5 3.0 3.5 0.5 05 v cc = 5.0v 3.5 ? switch t a = +85 c t a = +25 c t a = -40 c max4852 on-resistance vs. com voltage max4850 toc07 com voltage (v) on-resistance ( ? ) 4 2 5 10 15 20 25 30 35 40 45 0 06 v cc = 1.8v 7 ? switch v cc = 2.0v v cc = 2.3v v cc = 2.5v v cc = 3.0v v cc = 5.0v max4852 on-resistance vs. com voltage max4850 toc08 com voltage (v) on-resistance ( ? ) 4 2 3 4 5 6 7 8 2 06 v cc = 3.0v 7 ? switch t a = +85 c t a = +25 c t a = -40 c max4852 on-resistance vs. com voltage max4850 toc09 com voltage (v) on-resistance ( ? ) 5 4 1 2 3 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1.5 06 v cc = 5.0v 7 ? switch t a = +85 c t a = +25 c t a = -40 c typical operating characteristics (v cc = 3.0v, t a = +25 c, unless otherwise noted.)
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling 6 _______________________________________________________________________________________ typical operating characteristics (continued) (v cc = 3.0v, t a = +25 c, unless otherwise noted.) max4852h on-resistance vs. com voltage max4850 toc10 com voltage (v) on-resistance ( ? ) 4 2 5 10 15 20 25 30 35 40 45 0 06 v cc = 1.8v 7 ? switch v cc = 2.0v v cc = 2.3v v cc = 2.5v v cc = 3.0v v cc = 5.0v max4852h on-resistance vs. com voltage max4850 toc11 com voltage (v) on-resistance ( ? ) 2.5 2.0 1.5 1.0 0.5 3 4 5 6 7 8 2 0 3.0 v cc = 3.0v 7 ? switch t a = +85 c t a = +25 c t a = -40 c max4852h on-resistance vs. com voltage max4850 toc12 com voltage (v) on-resistance ( ? ) 4 3 1 2 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1.5 05 v cc = 5.0v 7 ? switch t a = +85 c t a = +25 c t a = -40 c max4850 supply current vs. supply voltage max4850 toc13 supply voltage (v) supply current ( a) 4.5 3.5 2.5 3 4 5 6 7 2 1.5 5.5 t a = -40 c t a = +25 c t a = +85 c max4850h supply current vs. supply voltage max4850 toc14 supply voltage (v) supply current ( a) 4.5 3.5 2.5 3 4 5 6 7 8 9 10 2 1.5 5.5 t a = -40 c t a = +25 c t a = +85 c t a = -40 c t a = +25 c t a = +85 c max4852 supply current vs. supply voltage max4850 toc15 supply voltage (v) supply current (na) 4.5 3.5 2.5 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 1.5 5.5 t a = -40 c t a = +85 c t a = +25 c max4852h supply current vs. supply voltage max4850 toc16 supply voltage (v) supply current ( a) 4.5 3.5 2.5 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 3.0 1.5 5.5 t a = -40 c t a = +25 c t a = +85 c turn-on/turn-off time vs. supply voltage max4850 toc17 supply voltage (v) turn-on/turn-off time (ns) 4.5 3.5 2.5 10 20 30 40 50 60 0 1.5 5.5 t on t off 3.5 ? switch
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling _______________________________________________________________________________________ 7 turn-on/turn-off time vs. temperature max4850 toc18 temperature ( c) turn-on/turn-off time (ns) 60 35 10 -15 22 24 26 28 30 32 34 20 -40 85 t on 3.5 ? switch t off turn-on/turn-off time vs. supply voltage max4850 toc19 supply voltage (v) turn-on/turn-off time (ns) 4.5 3.5 2.5 10 20 30 40 50 60 0 1.5 5.5 t on t off 7 ? switch turn-on/turn-off time vs. temperature max4850 toc20 temperature ( c) turn-on/turn-off time (ns) 60 35 10 -15 22 24 26 28 30 32 34 20 -40 85 7 ? switch t off t on logic threshold vs. supply voltage max4850 toc21 supply voltage (v) logic threshold (v) 4.5 3.5 2.5 0.8 1.0 1.2 1.4 1.6 0.6 1.5 5.5 v in rising v in falling charge injection vs. com voltage max4850 toc22 com voltage (v) charge injection (pc) 4 3 2 1 10 20 30 40 0 05 3.5 ? switch v cc = 3v v cc = 5v charge injection vs. com voltage max4850 toc23 com voltage (v) charge injection (pc) 4 3 2 1 10 20 30 40 0 05 7 ? switch v cc = 3v v cc = 5v leakage current vs. temperature max4850 toc24 temperature ( c) leakage current (na) 60 35 10 -15 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 -40 85 3.5 ? switch com on-leakage com off-leakage leakage current vs. temperature max4850 toc25 temperature ( c) leakage current (na) 60 35 -15 10 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0 -40 85 7 ? switch com on-leakage com off-leakage typical operating characteristics (continued) (v cc = 3.0v, t a = +25 c, unless otherwise noted.)
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling 8 _______________________________________________________________________________________ frequency response max4850 toc26 frequency (mhz) frequency response (db) 100 10 1 -80 -60 -40 -20 0 20 -100 0.1 1000 off-response on-response crosstalk 3.5 ? switch frequency response max4850 toc27 frequency (mhz) frequency response (db) 100 10 1 -80 -60 -40 -20 0 20 -100 0.1 1000 off-response on-response crosstalk 7 ? switch total harmonic distortion vs. frequency max4850 toc28 frequency (hz) thd (%) 10k 1k 100 0.1 10 100k 1 0.01 3.5 ? switch r l = 600 ? total harmonic distortion vs. frequency max4850 toc29 frequency (hz) thd (%) 10k 1k 100 0.1 10 100k 1 0.01 7 ? switch r l = 600 ? typical operating characteristics (continued) (v cc = 3.0v, t a = +25 c, unless otherwise noted.)
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling _______________________________________________________________________________________ 9 comparator threshold vs. temperature max4850 toc30 temperature ( c) comparator threshold (v) 60 35 10 -15 1.02 1.04 1.06 1.08 1.10 1.00 -40 85 v cmpi_ rising v cmpi_ falling v cc = 3.0v comparator threshold vs. temperature max4850 toc31 temperature ( c) comparator threshold (v) 60 35 10 -15 1.625 1.650 1.675 1.700 1.725 1.750 1.600 -40 85 v cmpi_ rising v cmpi_ falling v cc = 5.0v max4850/max4852 switch passing signals above supply voltage max4850 toc32 v nc 2v/div 0v v com 0v 200 s/div v cc = 3.0v max4850h/max4852h switch entering high-impedance state max4850 toc33 200 s/div v nc 2v/div 0v v com 0v v cc = 3.0v hi-z state hi-z state typical operating characteristics (continued) (v cc = 3.0v, t a = +25 c, unless otherwise noted.)
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling 10 ______________________________________________________________________________________ pin descriptions max4850/max4850h pin name function 1, 8 n.c. no connection. not internally connected. 2 cin1 inverting input for comparator 1 3 cin2 inverting input for comparator 2 4 com1 common terminal for analog switch 1 5 no1 normally open terminal for analog switch 1 6 gnd ground 7 nc2 normally closed terminal for analog switch 2 9 in2 digital control input for analog switch 2. a logic low on in2 connects com2 to nc2 and a logic high connects com2 to no2. 10 com2 common terminal for analog switch 2 11 cout1 output for comparator 1 12 no2 normally open terminal for analog switch 2 13 cout2 output for comparator 2 14 v cc supply voltage. bypass to gnd with a 0.01f capacitor as close to the pin as possible. 15 in1 digital control input for analog switch 1. a logic low on in1 connects com1 to nc1 and a logic high connects com1 to no1. 16 nc1 normally closed terminal for analog switch 1 ep exposed paddle. connect to pc board ground plane. max4852/max4852h pin name function 1, 2, 3, 8, 11, 13 n.c. no connection. not internally connected. 4 com1 common terminal for analog switch 1 5 no1 normally open terminal for analog switch 1 6 gnd ground 7 nc2 normally closed terminal for analog switch 2 9 in2 digital control input for analog switch 2. a logic low on in2 connects com2 to nc2 and a logic high connects com2 to no2. 10 com2 common terminal for analog switch 2 12 no2 normally open terminal for analog switch 2 14 v cc supply voltage. bypass to gnd with a 0.01f capacitor as close to the pin as possible. 15 in1 digital control input for analog switch 1. a logic low on in1 connects com1 to nc1 and a logic high connects com1 to no1. 16 nc1 normally closed terminal for analog switch 1 ep exposed paddle. connect to pc board ground plane.
detailed description the max4850/max4850h/max4852/max4852h are low on-resistance, low-voltage, analog switches that operate from a +2v to +5.5v single supply and are fully specified for nominal 3.0v applications. these devices feature over-rail signal capability that allows signals up to 5.5v with supply voltages down to 2.0v. these devices are configured as dual spdt switches. these switches have low 50pf on-channel capacitance, which allows for 12mbps switching of the data signals for usb 2.0 full speed/1.1 applications. the max485_ _ are designed to switch d+ and d- usb signals with a guaran- teed skew of less than 1ns (see figure 1), as measured from 50% of the input signal to 50% of the output signal. the max4850_ features a comparator that can be used for headphone or mute detection. the comparator threshold is internally generated to be approximately 1/3 of v cc . applications information digital control inputs the logic inputs (in_) accept up to +5.5v even if the supply voltages are below this level. for example, with a +3.3v v cc supply, in_ can be driven low to gnd and high to +5.5v, allowing for mixing of logic levels in a system. driving in_ rail-to-rail minimizes power con- sumption. for a +2v supply voltage, the logic thresholds are 0.5v (low) and 1.4v (high); for a +5v supply voltage, the logic thresholds are 0.8v (low) and 1.8v (high). analog signal levels the on-resistance of these switches changes very little for analog input signals across the entire supply volt- age range (see typical operating characteristics ). the switches are bidirectional, so no_, nc_, and com_ can be either inputs or outputs. comparator the positive terminal of the comparator is internally set to v cc /3. when the negative terminal (cin_) is below the threshold (v cc /3), the comparator output (cout_) goes high. when cin_ rises above v cc /3, cout_ goes low. the comparator threshold allows for detection of head- phones since headphone audio signals are typically biased to v cc /2. power-supply sequencing caution: do not exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to the device. proper power-supply sequencing is recommended for all cmos devices. always apply v cc before applying analog signals, especially if the analog signal is not current-limited. max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling ______________________________________________________________________________________ 11
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling 12 ______________________________________________________________________________________ test circuits/timing diagrams t r < 20ns t f < 20ns 50% logic input r l com_ gnd in_ c l includes fixture and stray capacitance. v out = v no ( r l ) r l + r on v no t off 0v no_ 0.9 x v 0ut 0.9 x v out t on v out switch output logic input in depends on switch configuration; input polarity determined by sense of switch. v cc c l v cc v out max4850_ max4852_ v cc 0v switch input normal mode normal mode high-z mode v cc + 0.5v t hiz t hizb figure 1. switching time t skew_i 90% 50% 10% 90% 50% 10% t fi input a input a- t ri t skew_o 90% 50% 10% 90% 50% 10% t fo output b output b- t ro b- c l a- r s a b c l txd+ txd- r s r s = 39 ? c l = 50pf delay due to switch for rising input and rising output signals. delay due to switch for falling input and falling output signals. change in skew through the switch for output signals. change in skew through the switch for input signals. |t skew_i | |t skew_o | |t fo - t fi | |t ro - t ri | figure 2. input/output skew timing diagram
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling ______________________________________________________________________________________ 13 50% v cc 0v logic input v out 0.9 x v out t bbm logic input r l gnd c l includes fixture and stray capacitance. no_ in_ nc_ v out v cc v cc c l v n_ com_ max4850_ max4852_ figure 3. break-before-make interval v gen gnd com_ c l v out v cc v out in off on off ? v out q = ( ? v out )(c l ) nc_ logic-input waveforms inverted for switches that have the opposite logic sense. off on off in v il to v ih v cc r gen in_ max4850_ max4852_ or no_ figure 4. charge injection measurements are standardized against shorts at ic terminals. off-isolation is measured between com_ and "off", no_ or nc_ terminal on each switch. on-loss is measured between com_ and "on", no_ or nc_ terminal on each switch. crosstalk is measured from one channel to the other channel. signal direction through switch is reversed; worst values are recorded. +5v v out v cc in_ nc1 com1 no1* v in max4850_ max4852_ off-isolation = 20log v out v in on-loss = 20log v out v in crosstalk = 20log v out v in network analyzer 50 ? 50 ? 50 ? 50 ? meas ref 10nf 0v or v cc 50 ? gnd *for crosstalk this pin is no2. nc2 and com2 are open. figure 5. on-loss, off-isolation, and crosstalk
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling 14 ______________________________________________________________________________________ capacitance meter nc_ or no_ com_ gnd in v il or v ih 10nf v cc f = 1mhz v cc max4850_ max4852_ figure 6. channel off-/on-capacitance max4850_ v cc 3 v th + 100mv v th - 100mv v out 0v t comp t comp 50% 50% 50% 50% t r < 20ns t f < 20ns v cc v cc gnd v cout_ cin_ cout_ v cin_ no_ v th = v cc /3 comparator input (v cin_ ) comparator output (v cout_ ) figure 7. comparator switching time
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling ______________________________________________________________________________________ 15 top view 16 1 2 3 4 12 11 10 9 15 14 13 5678 nc1 in1 v cc cout2 no2 cout1 com2 in2 cin1 cin2 com1 no1 gnd nc2 n.c. n.c. max4850 max4850h 16 1 2 3 4 12 11 10 9 15 14 13 5678 nc1 in1 v cc n.c. no2 n.c. com2 in2 n.c. n.c. com1 no1 gnd nc2 n.c. n.c. max4852 max4852h thin qfn thin qfn connect exposed paddle to ground. pin configurations part r on nc_/no_ ( ? ) comparators over-rail handling max4850 3.5/3.5 2 input signal passes through the switch max4850h 3.5/3.5 2 high-impedance switch input max4852 3.5/7 input signal passes through the switch max4852h 3.5/7 high-impedance switch input selector guide chip information transistor count: 735 process: cmos data source audio source v cc 3 mute button v cc max4850_ out+ out- out+ out- nc1 no1 nc2 no2 cout com1 in1 in2 com2 cin input select mute typical operating circuit
max4850/max4850h/max4852/max4852h dual spdt analog switches with over-rail signal handling 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. 16 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2004 maxim integrated products printed usa is a registered trademark of maxim integrated products. 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 .) 12x16l qfn thin.eps 0.10 c 0.08 c 0.10 m c a b d d/2 e/2 e a1 a2 a e2 e2/2 l k e (nd - 1) x e (ne - 1) x e d2 d2/2 b l e l c l e c l l c l c e 1 2 21-0136 package outline 12, 16l, thin qfn, 3x3x0.8mm 1. dimensioning & tolerancing conform to asme y14.5m-1994. exposed pad variations 2. all dimensions are in millimeters. angles are in degrees. 3. n is the total number of terminals. 4. the terminal #1 identifier and terminal numbering convention shall conform to jesd 95-1 spp-012. details of terminal #1 identifier are optional, but must be located within the zone indicated. the terminal #1 identifier may be either a mold or marked feature. 5. dimension b applies to metallized terminal and is measured between 0.20 mm and 0.25 mm from terminal tip. 6. nd and ne refer to the number of terminals on each d and e side respectively. 7. depopulation is possible in a symmetrical fashion. 8. coplanarity applies to the exposed heat sink slug as well as the terminals. 9. drawing conforms to jedec mo220 revision c. notes: e 2 2 21-0136 package outline 12, 16l, thin qfn, 3x3x0.8mm down bonds allowed
e nglish ? ???? ? ??? ? ??? what's ne w p roducts solutions de sign ap p note s sup p ort buy comp any me mbe rs max4852 part number table notes: see the max4852 quickview data sheet for further information on this product family or download the max4852 full data sheet (pdf, 648kb). 1. other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales . 2. didn't find what you need? ask our applications engineers. expert assistance in finding parts, usually within one business day. 3. part number suffixes: t or t&r = tape and reel; + = rohs/lead-free; # = rohs/lead-exempt. more: see full data sheet or part naming c onventions . 4. * some packages have variations, listed on the drawing. "pkgc ode/variation" tells which variation the product uses. 5. part number free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis max4852ete+ thin qfn;16 pin;3x3x0.8mm dwg: 21-0136i (pdf) use pkgcode/variation: t1633+4 * -40c to +85c rohs/lead-free: yes materials analysis max4852ete+t -40c to +85c rohs/lead-free: yes max4852ete thin qfn;16 pin;3x3x0.8mm dwg: 21-0136i (pdf) use pkgcode/variation: t1633-4 * -40c to +85c rohs/lead-free: no materials analysis max4852ete-t -40c to +85c rohs/lead-free: no didn't find what you need? c ontac t us: send us an email c opyright 2 0 0 7 by m axim i ntegrated p roduc ts , dallas semic onduc tor ? legal n otic es ? p rivac y p olic y

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