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1 ? fn6153.2 caution: these devices are sensitive to electrosta tic discharge; follow proper ic handling procedures. 1-888-intersil or 1-888-468-3774 | intersil (and design) is a registered trademark of intersil americas inc. copyright ? intersil americas inc. 2007. all rights reserved. all other trademarks mentioned are the property of their respective owners. isl28136, ISL28236 5mhz, single and dual precision rail-to- rail input-output (rrio) op amps the isl28136 and ISL28236 are low-power single and dual operational amplifiers optimized for single supply operation from 2.4v to 5.5v, allowing op eration from one lithium cell or two ni-cd batteries. these devices feature a gain-bandwidth product of 5mhz and are unity-gain stable with a -3db bandwidth of 13mhz. these devices feature an input range enhancement circuit (irec) which enables them to maintain cmrr performance for input voltages greater than the positive supply. the input signal is capable of swinging 0.25v above the positive supply and to the negative supply with only a slight degradation of the cmrr performance. the output operation is rail-to-rail. the parts typically draw less than 1ma supply current per amplifier while meeting excellent dc accuracy, ac performance, noise and output drive specifications. operation is guaranteed over -40c to +125c temperature range. features ? 5mhz gain bandwidth product @ a v = 100 ? 13mhz -3db unity gain bandwidth ? 900a typical supply current (per amplifier) ? 150v maximum offset voltage (8 ld so) ? 16na typical input bias current ? down to 2.4v single supply voltage range ? rail-to-rail input and output ? enable pin (isl28136 only) ? -40c to +125c operation ? pb-free plus anneal available (rohs compliant) applications ? low-end audio ? 4ma to 20ma current loops ? medical devices ? sensor amplifiers ? adc buffers ? dac output amplifiers pinouts ordering information part number (note) part marking package (pb-free) pkg. dwg. # isl28136fhz-t7* gabp 6 ld sot-23 tape and reel mdp0038 isl28136fhz-t7a* gabp 6 ld sot-23 tape and reel mdp0038 isl28136fbz 28136fbz 8 ld soic mdp0027 isl28136fbz-t7* 28136fbz 8 ld soic tape and reel mdp0027 coming soon ISL28236fbz-t7* 8 ld soic tape and reel mdp0027 coming soon ISL28236faz-t7a* 8 ld msop tape and reel mdp0043 * ?-t7? and ?-t7a? suffix is for tape and reel. please refer to tb347 for details on reel specifications. note: intersil pb-free plus anneal products employ special pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are rohs compliant and compatible with both snpb and pb-free soldering operations. intersil pb-free products are msl classified at pb-free peak reflow temperatures that meet or exceed the pb-free requirements of ipc/jedec j std-020. isl28136 (6 ld sot-23) top view isl28136 (8 ld soic) top view ISL28236 (8 ld soic) top view ISL28236 (8 ld msop) top view 1 2 3 6 4 5 +- out v- in+ v+ en in- 1 2 3 4 8 7 6 5 - + nc in- in+ en v+ out v- nc 1 2 3 4 8 7 6 5 out_a in-_a in+_a v+ out_b in-_b v- in+_b + - +- 1 2 3 4 8 7 6 5 out_a in-_a in+_a v+ out_b in-_b v- in+_b + - +- data sheet june 28, 2007
2 fn6153.2 june 28, 2007 absolute maxi mum ratings (t a = +25c) thermal information supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.75v supply turn on voltage slew rate . . . . . . . . . . . . . . . . . . . . . 1v/ s differential input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5ma differential input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5v input voltage . . . . . . . . . . . . . . . . . . . . . . . . . v- - 0.5v to v+ + 0.5v esd rating human body model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kv machine model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300v thermal resistance ja (c/w) 6 ld sot-23 package . . . . . . . . . . . . . . . . . . . . . . . 230 8 ld so package . . . . . . . . . . . . . . . . . . . . . . . . . . 110 8 ld msop package . . . . . . . . . . . . . . . . . . . . . . . . 115 ambient operating temperature range . . . . . . . . .-40c to +125c storage temperature range . . . . . . . . . . . . . . . . . .-65c to +150c operating junction temperature . . . . . . . . . . . . . . . . . . . . . +125c pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/pb-freereflow.asp caution: do not operate at or near the maximum ratings listed fo r extended periods of time. exposure to such conditions may adv ersely impact product reliability and result in failures not covered by warranty. important note: all parameters having min/max specifications are guaranteed. typical values are for information purposes only. u nless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: t j = t c = t a electrical specifications v + = 5v, v - = 0v, v cm = 2.5v, r l = open, t a = +25c unless otherwise specified. boldface limits apply over the operating temperature range, -40c to +125c. temperature data established by c haracterization. parameter description conditions min (note 1) typ max (note 1) unit dc specifications v os input offset voltage 8 ld so -150 -270 10 150 270 v 6 ld sot-23 -400 -450 10 400 450 v input offset voltage vs temperature 0.4 v/c i os input offset current t a = -40c to +85c -10 -15 010 15 na i b input bias current t a = -40c to +85c -10 -15 16 35 40 na v cm common-mode voltage range guaranteed by cmrr 0 5 v cmrr common-mode rejection ratio v cm = 0v to 5v 90 85 114 db psrr power supply rejection ratio v + = 2.4v to 5.5v 90 85 99 db a vol large signal voltage gain v o = 0.5v to 4v, r l = 100k to v cm 600 500 1770 v/mv v o = 0.5v to 4v, r l = 1k to v cm 140 v/mv v out maximum output voltage swing output low, r l = 100k to v cm 36 10 mv output low, r l = 1k to v cm 70 90 110 mv output high, r l = 100k to v cm 4.99 4.98 4.994 v output high, r l = 1k to v cm 4.92 4.89 4.94 v i s,on supply current, enabled per amp 0.8 0.9 1.1 1.4 ma i s,off supply current, disabled (isl28136) 10 14 16 a i o + short-circuit output source current r l = 10 to v cm 48 45 56 ma t --------------- - isl28136, ISL28236
3 fn6153.2 june 28, 2007 i o - short-circuit output sink current r l = 10 to v cm 50 45 55 ma v supply supply operating range v+ to v- 2.4 5.5 v v en h en pin high level (isl28136) 2 v v en l en pin low level (isl28136) 0.8 v i en h en pin input high current (isl28136) v en = v+ 1 1.5 1.6 a i en l en pin input low current (isl28136) v en = v- 16 25 30 na ac specifications gbw gain bandwidth product a v = 100, r f = 100k , r g = 1k to v cm 5mhz unity gain bandwidth -3db bandwidth a v = 1, r f = 0 , r l = 10k to v cm , v out = 10mv p-p 13 mhz e n input noise voltage peak-to-peak f = 0.1hz to 10hz, r l = 10k to v cm 0.4 v p-p input noise voltage density f o = 1khz, r l = 10k to v cm 15 nv/ hz i n input noise current density f o = 10khz, r l = 10k to v cm 0.35 pa/ hz cmrr input common mode rejection ratio f o = to 120hz; v cm = 1v p-p , r l = 1k to v cm -90 db psrr+ to 120hz power supply rejection ratio (v + )v + , v - = 1.2v and 2.5v, v source = 1v p-p , r l = 1k to v cm -88 db psrr- to 120hz power supply rejection ratio (v - )v + , v - = 1.2v and 2.5v v source = 1v p-p , r l = 1k to v cm -105 db transient response sr slew rate v out = 1.5v; r f = 50k , r g = 50k to v cm 1.9 v/s t r , t f , large signal rise time, 10% to 90%, v out a v = +2, v out = 2v p-p , r g = r f = r l = 1k to v cm 0.6 s fall time, 90% to 10%, v out a v = +2, v out = 2v p-p , r g = r f = r l = 1k to v cm 0.5 s t r , t f , small signal rise time, 10% to 90%, v out a v = +2, v out = 10mv p-p , r g = r f = r l = 1k to v cm 65 ns fall time, 90% to 10%, v out a v = +2, v out = 10mv p-p , r g = r f = r l = 1k to v cm 62 ns t en enable to output turn-on delay time, 10% en to 10% v out (isl28136) v en = 5v to 0v, a v = +2, r g = r f = r l = 1k to v cm 5s enable to output turn-off delay time, 10% en to 10% v out (isl28136) v en = 0v to 5v, a v = +2, r g = r f = r l = 1k to v cm 0.3 s note: 1. parts are 100% tested at +25c. over temperature limits established by charac terization and are not production tested. electrical specifications v + = 5v, v - = 0v, v cm = 2.5v, r l = open, t a = +25c unless otherwise specified. boldface limits apply over the operating temperature range, -40c to +125c. temperature data established by c haracterization. (continued) parameter description conditions min (note 1) typ max (note 1) unit isl28136, ISL28236
4 fn6153.2 june 28, 2007 typical performance curves v + = 5v, v - = 0v, v cm = 2.5v, r l = open figure 1. gain vs frequency vs feedback resistor values r f /r g figure 2. gain vs frequency vs v out, r l = 1k figure 3. gain vs frequency vs v out , r l = 10k figure 4. gain vs frequency vs v out , r l = 100k figure 5. gain vs frequency vs r l figure 6. frequency resp onse vs closed loop gain -15 -10 -5 0 5 10 15 100 1k 10k 100k 1m 10m 100m frequency (hz) normalized gain (db) r f = r g = 100k r f = r g = 1k r f = r g = 10k v + = 5v r l = 1k a v = +2 v out = 10mv p-p c l = 16.3pf -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 10k 100k 1m 10m 100m frequency (hz) normalized gain (db) v out = 100mv v out = 10mv v out = 50mv v out = 1v v + = 5v r l = 1k a v = +1 v out = 10mv p-p c l = 16.3pf -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 10k 100k 1m 10m 100m frequency (hz) v + = 5v r l = 10k a v = +1 v out = 10mv p-p c l = 16.3pf normalized gain (db) v out = 100mv v out = 10mv v out = 50mv v out = 1v -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 10k 100k 1m 10m 100m frequency (hz) normalized gain (db) v out = 100mv v out = 10mv v out = 50mv v out = 1v v + = 5v r l = 100k a v = +1 v out = 10mv p-p c l = 16.3pf r l = 10k r l = 1k -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 10k 100k 1m 10m 100m frequency (hz) normalized gain (db) r l = 100k v + = 5v a v = +1 v out = 10mv p-p c l = 16.3pf -10 0 10 20 30 40 50 60 70 100 1k 10k 100k 1m 10m 100m frequency (hz) a v = 1 a v = 10 a v = 101 a v = 1001 v + = 5v v out = 10mv p-p c l = 16.3pf r l = 10k 100 1k 10k 100k 1m 10m 100m frequency (hz) gain (db) a v = 1001, r g = 1k, r f = 1m a v = 10, r g = 1k, r f = 9.09k a v = 1, r g = inf, r f = 0 a v = 101, r g = 1k, r f = 100k isl28136, ISL28236
5 fn6153.2 june 28, 2007 figure 7. gain vs frequency vs supply vo ltage figure 8. gain vs frequency vs c l figure 9. cmrr vs frequency; v + = 2.4v and 5v figure 10. psrr vs frequency, v + , v - = 1.2v figure 11. psrr vs frequency, v + , v - = 2.5v figure 12. input voltage noise density vs frequency typical performance curves v + = 5v, v - = 0v, v cm = 2.5v, r l = open (continued) -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 10k 100k 1m 10m 100m frequency (hz) normalized gain (db) r l = 10k a v = +1 v out = 10mv p-p c l = 16.3pf v + = 5v v + = 2.4v -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 c l = 51.7pf c l = 43.7pf c l = 37.7pf c l = 26.7pf c l = 16.7pf c l = 4.7pf 10k 100k 1m 10m 100m frequency (hz) normalized gain (db) v + = 5v r l = 1k a v = +1 v out = 10mv p-p -100 -80 -60 -40 -20 0 20 cmrr (db) v + = 2.4v, 5v r l = 1k a v = +1 v cm = 1v p-p c l = 16.3pf 100 1k 10k 100k 1m 10m frequency (hz) 10 -120 -100 -80 -60 -40 -20 0 20 psrr (db) 100 1k 10k 100k 1m 10m frequency (hz) 10 psrr- psrr+ v + , v - = 1.2v r l = 1k a v = +1 v source = 1v p-p c l = 16.3pf psrr- psrr+ v + , v - = 2.5v r l = 1k a v = +1 v source = 1v p-p c l = 16.3pf -120 -100 -80 -60 -40 -20 0 20 psrr (db) 100 1k 10k 100k 1m 10m frequency (hz) 10 10 100 1 10 100 1k 10k 100k frequency (hz) input voltage noise (nv hz) v + = 5v r l = 1k a v = +1 c l = 16.3pf isl28136, ISL28236
6 fn6153.2 june 28, 2007 figure 13. input current noise density vs freque ncy figure 14. input voltage noise 0.1hz to 10hz figure 15. large signal step respons e figure 16. small signal step response figure 17. enable to output response figu re 18. input offset voltage vs common-mode input voltage typical performance curves v + = 5v, v - = 0v, v cm = 2.5v, r l = open (continued) 0.1 1 10 1 10 100 1k 10k 100k frequency (hz) input current noise (pa hz) v + = 5v r l = 1k a v = +1 c l = 16.3pf -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 012345678910 time (s) input noise (v) v + = 5v r l = 10k r g = 10, r f = 100k a v = 10000 c l = 16.3pf -1.5 -1.0 -0.5 0 0.5 1.0 1.5 012345678910 time (s) large signal (v) v + , v - = 2.5v r l = 1k r g = r f = 10k a v = 2 c l = 16.3pf v out = 1.5v p-p 0.012 0.014 0.016 0.018 0.020 0.022 0.024 0.026 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 time (s) small signal (v) v + , v - = 2.5v r l = 1k r g = r f =10k a v = 2 c l = 16.3pf v out = 10mv p-p -1 0 1 2 3 4 5 6 0 102030405060708090100 time (s) v-enable (v) -0.1 0.1 0.3 0.5 0.7 0.9 1.1 1.3 output (v) v + = 5v r g = r f = r l = 1k a v = +2 v out = 1v p-p c l = 16.3pf v-enable v-out -100 -80 -60 -40 -20 0 20 40 60 80 100 -10123456 v cm (v) v os (v) v + = 5v r l = open a v = +1000 r f = 100k, r g = 100 isl28136, ISL28236
7 fn6153.2 june 28, 2007 figure 19. input offset current vs common-mode input voltage figure 20. supply current enabled vs temperature, v +, v - = 2.5v figure 21. supply current disabled vs temperature, v +, v - = 2.5v figure 22. v os vs temperature, v +, v - = 2.5v, sot package figure 23. v os vs temperature, v +, v - = 2.5v, soic package typical performance curves v + = 5v, v - = 0v, v cm = 2.5v, r l = open (continued) -100 -80 -60 -40 -20 0 20 40 60 80 100 -10123456 v cm (v) i-bias (na) v + = 5v r l = open a v = +1000 r f = 100k, r g = 100 600 700 800 900 1000 1100 1200 -40 -20 0 20 40 60 80 100 120 temperature (c) current (a) min median max n = 1150 4 5 6 7 8 9 10 11 -40 -20 0 20 40 60 80 100 120 temperature (c) min median max n = 1150 current (a) -400 -300 -200 -100 0 100 200 300 400 -40 -20 0 20 40 60 80 100 120 temperature (c) min median max n = 1150 v os ( v) -250 -200 -150 -100 -50 0 50 100 150 200 250 300 -40 -20 0 20 40 60 80 100 120 temperature (c) min median max n = 1150 v os ( v) isl28136, ISL28236
8 fn6153.2 june 28, 2007 figure 24. v os vs temperature, v +, v - = 1.2v, sot package figure 25. v os vs temperature, v +, v - = 1.2v, soic package figure 26. i bias + vs temperature, v +, v - = 2.5v figure 27. i bias - vs temperature, v +, v - = 2.5v figure 28. i bias + vs temperature, v +, v - = 1.2v figure 29. i bias - vs temperature, v +, v - = 1.2v typical performance curves v + = 5v, v - = 0v, v cm = 2.5v, r l = open (continued) -400 -300 -200 -100 0 100 200 300 400 -40 -20 0 20 40 60 80 100 120 temperature (c) min median max n = 1150 v os ( v) -250 -200 -150 -100 -50 0 50 100 150 200 250 300 -40 -20 0 20 40 60 80 100 120 temperature (c) min median max n = 1150 min v os ( v) -10 -5 0 5 10 15 20 25 30 -40-200 20406080100120 temperature (c) min median max n = 1150 i bias + (na) -10 -5 0 5 10 15 20 25 30 -40 -20 0 20 40 60 80 100 120 temperature (c) i bias - (na) min median max n = 1150 -25 -20 -15 -10 -5 0 5 10 15 -40-200 20406080100120 temperature (c) min median max n = 1150 i bias + (na) -25 -20 -15 -10 -5 0 5 10 15 20 -40-200 20406080100120 temperature (c) min median max n = 1150 i bias - (na) isl28136, ISL28236
9 fn6153.2 june 28, 2007 figure 30. i os vs temperature, v +, v - = 2.5v figure 31. i os vs temperature, v +, v - = 1.2v figure 32. cmrr vs temperature, v cm = -2.5v to +2.5v, v +, v - = 2.5v figure 33. psrr vs temperature, v +, v - = 1.2v to 2.75v figure 34. avol vs temperature, v +, v - = 2.5v, v o = -2v to +2v, r l = 100k figure 35. avol vs temperature, v +, v - = 2.5v, v o = -2v to +2v, r l = 1k typical performance curves v + = 5v, v - = 0v, v cm = 2.5v, r l = open (continued) -8 -6 -4 -2 0 2 4 6 8 10 -40-200 20406080100120 temperature (c) i os (n a) min median max n = 1150 -8 -6 -4 -2 0 2 4 6 8 10 12 -40 -20 0 20 40 60 80 100 120 temperature (c) i os (na) min median max n = 1150 90 95 100 105 110 115 120 125 130 135 140 -40 -20 0 20 40 60 80 100 120 temperature (c) cmrr (db) min median max n = 1150 90 95 100 105 110 115 120 -40-200 20406080100120 temperature (c) min median max n = 1150 psrr (db) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 -40-20 0 20406080100120 temperature (c) avol (v/mv) min median max n = 1150 60 80 100 120 140 160 180 200 -40 -20 0 20 40 60 80 100 120 temperature (c) avol (v/mv) min median max n = 1150 isl28136, ISL28236
10 fn6153.2 june 28, 2007 figure 36. v out high vs temperature, v +, v - = 2.5v, r l =1k figure 37. v out low vs temperature, v +, v - = 2.5v, r l =1k pin descriptions isl28136 (6 ld sot-23) isl28136 (8 ld soic) ISL28236 (8 ld soic) (8 ld msop) pin name function equivalent circuit 1, 5 nc not connected 42 2 (a) 6 (b) in- in-_a in-_b inverting input circuit 1 33 3 (a) 5 (b) in+ in+_a in+_b non-inverting input see circuit 1 2 4 4 v- negative supply circuit 2 16 1 (a) 7 (b) out out_a out_b output circuit 3 6 7 8 v+ positive supply see circuit 2 58 en chip enable circuit 3 typical performance curves v + = 5v, v - = 0v, v cm = 2.5v, r l = open (continued) 4.930 4.935 4.940 4.945 4.950 4.955 4.960 -40 -20 0 20 40 60 80 100 120 temperature (c) v out (v) min median max n = 1150 45 50 55 60 65 70 75 -40 -20 0 20 40 60 80 100 120 temperature (c) v out (m v) min max median n = 1150 in+ in- v+ v- v+ v- capacitively coupled esd clamp v+ v- out logic pin v+ v- isl28136, ISL28236
11 fn6153.2 june 28, 2007 applications information introduction the isl28136 and ISL28236 are single and dual channel bi- cmos rail-to-rail input, output (rrio) micropower precision operational amplifiers. the parts are designed to operate from single supply (2.4v to 5.5v) or dual supply (1.2v to 2.75v). the parts have an input common mode range that extends 0.25v above the posit ive rail and down to the negative supply rail. the outpu t operation can swing within about 3mv of the supply rails with a 100k load. rail-to-rail input many rail-to-rail input stages us e two differential input pairs, a long-tail pnp (or pfet) and an npn (or nfet). severe penalties have to be paid for this circuit topology. as the input signal moves from one supply rail to another, the operational amplifier switches from one input pair to the other causing drastic changes in input offset voltage and an undesired change in magnitude and polarity of input offset current. the isl28136 and ISL28236 achieve input rail-to-rail operation without sacrific ing important precision specifications and degrading di stortion performance. the devices? input offset voltage exhibits a smooth behavior throughout the entire common-mode input range. the input bias current versus the common-mode voltage range gives an undistorted behavior from typically down to the negative rail to 0.25v higher than the positive rail. rail-to-rail output a pair of complementary bi-polar devices are used to achieve the rail-to-rail output swing. the pnp sinks current to swing the output in the negative direction. the npn sources current to swing the out put in the positive direction. the isl28136 and ISL28236 with a 100k load will swing to within 3mv of the positive supply rail and within 3mv of the negative supply rail. results of over-driving the output caution should be used when over-driving the output for long periods of time. over-driving the output can occur in two ways. 1) the input voltage times the gain of the amplifier exceeds the supply voltage by a large value or, 2) the output current required is higher than the out put stage can deliver. these conditions can result in a shift in the input offset voltage (v os ) as much as 1v/hr. of exposure under these conditions. in+ and in- input protection all input terminals have internal esd protection diodes to both positive and negative supply rails, limiting the input voltage to within one diode beyond the supply rails. they also contain back-to-back diodes across the input terminals (?pin descriptions? on page 10 - circuit 1 ) . for applications where the input differential voltage is expected to exceed 0.5v, an external series resistor must be used to ensure the input currents never exceed 5ma (figure 38). enable/disable feature the isl28136 offers an en pin that disables the device when pulled up to at least 2.0v. in the disabled state (output in a high impedance state), the part consumes typically 10a at room temperature. the en pin has an internal pull down. if left open, the en pin will pull to the negative rail and the device will be enabled by default. the en pin should never be left floating. when not used, the en pin should either be left floating or connected to the v- pin. by disabling the part, multiple isl28136 parts can be connected together as a mux. in this configuration, the outputs are tied together in parallel and a channel can be selected by the en pin. the loading effects of the feedback resistors of the disabled amp lifier must be considered when multiple amplifier outputs are connected together. note that feed through from the in+ to in- pins occurs on any mux amp disabled channel where the input differential voltage exceeds 0.5v (e.g., active channel v out = 1v, while disabled channel v in = gnd), so the mux implementation is best suited for small signal applic ations. if large signals are required, use series in+ resistors, or a large value r f , to keep the feed through current low enough to minimize the impact on the active channel. see the ?limitations of the differential input protection? section for more details. limitations of the differential input protection if the input differential voltage is expected to exceed 0.5v, an external current limiting resistor must be used to ensure the input current never exceeds 5ma. for non-inverting unity gain applications, the current limiting can be via a series in+ resistor, or via a feedback resistor of appropriate value. for other gain configurations, the series in+ resi stor is the best choice, unless the feedback (r f ) and gain setting (r g ) resistors are both sufficiently large to limit the input current to 5ma. large differential input voltages can arise from several sources: 1) during open loop (comparator) operation. used this way, the in+ and in- voltages don?t track, so differentials arise. 2) when the amplifier is disabled but an input signal is still present. an r l or r g to gnd keeps the in- at gnd, while the varying in+ signal creates a differential voltage. mux amp applications are similar, except that the active channel v out determines the voltage on the in- terminal. figure 38. input current limiting - + r in r l v in v out isl28136, ISL28236
12 fn6153.2 june 28, 2007 3) when the slew rate of the input pulse is considerably faster than the op amp?s slew rate. if the v out can?t keep up with the in+ signal, a differential voltage results, and visible distortion occurs on the input and output signals. to avoid this issue, keep the input slew rate below 1.9v/ s, or use appropriate current limiting resistors. large (>2v) differential input voltages can also cause an increase in disabled i cc . using only one channel the ISL28236 is a dual op amp. if the application only requires one channel, the user must configure the unused channel to prevent it from o scillating. the unused channel will oscillate if the input and output pins are floating. this will result in higher than expected supply currents and possible noise injection into the channel being used. the proper way to prevent this oscillation is to short the output to the negative input and ground the positive input (as shown in figure 39). current limiting these devices have no internal current-limiting circuitry. if the output is shorted, it is possible to exceed the absolute maximum rating for output current or power dissipation, potentially resulting in the destruction of the device. power dissipation it is possible to exceed the +125c maximum junction temperatures under certain load and power-supply conditions. it is therefore important to calculate the maximum junction temperature (t jmax ) for all applications to determine if power supply voltages, load conditions, or package type need to be modified to remain in the safe operating area. these paramete rs are related as follows: where: ?p dmaxtotal is the sum of the maximum power dissipation of each amplifier in the package (pd max ) ?pd max for each amplifier can be calculated as follows: where: ?t max = maximum ambient temperature ? ja = thermal resistance of the package ?pd max = maximum power dissipation of 1 amplifier ?v s = supply voltage (magnitude of v + and v - ) ?i max = maximum supply current of 1 amplifier ?v outmax = maximum output voltage swing of the application ?r l = load resistance figure 39. preventing oscillations in unused channels - + t jmax t max ja xpd maxtotal () + = (eq. 1) pd max 2*v s i smax v s ( - v outmax ) v outmax r l ---------------------------- + = (eq. 2) isl28136, ISL28236
13 fn6153.2 june 28, 2007 isl28136, ISL28236 sot-23 package family e1 n a d e 4 3 2 1 e1 0.15 d c 2x 0.20 c 2x e b 0.20 m d c a-b b nx 6 2 3 5 seating plane 0.10 c nx 1 3 c d 0.15 a-b c 2x a2 a1 h c (l1) l 0.25 0 +3 -0 gauge plane a mdp0038 sot-23 package family symbol millimeters tolerance sot23-5 sot23-6 a 1.45 1.45 max a1 0.10 0.10 0.05 a2 1.14 1.14 0.15 b 0.40 0.40 0.05 c 0.14 0.14 0.06 d 2.90 2.90 basic e 2.80 2.80 basic e1 1.60 1.60 basic e 0.95 0.95 basic e1 1.90 1.90 basic l 0.45 0.45 0.10 l1 0.60 0.60 reference n 5 6 reference rev. f 2/07 notes: 1. plastic or metal protrusions of 0.25mm maximum per side are not included. 2. plastic interlead protrusions of 0.25mm maximum per side are not included. 3. this dimension is measured at datum plane ?h?. 4. dimensioning and tolerancing per asme y14.5m-1994. 5. index area - pin #1 i.d. will be located within the indicated zone (sot23-6 only). 6. sot23-5 version has no center lead (shown as a dashed line).
14 fn6153.2 june 28, 2007 isl28136, ISL28236 small outline package family (so) gauge plane a2 a1 l l1 detail x 4 4 seating plane e h b c 0.010 b m ca 0.004 c 0.010 b m ca b d (n/2) 1 e1 e n n (n/2)+1 a pin #1 i.d. mark h x 45 a see detail ?x? c 0.010 mdp0027 small outline package family (so) symbol inches tolerance notes so-8 so-14 so16 (0.150?) so16 (0.300?) (sol-16) so20 (sol-20) so24 (sol-24) so28 (sol-28) a 0.068 0.068 0.068 0.104 0.104 0.104 0.104 max - a1 0.006 0.006 0.006 0.007 0.007 0.007 0.007 0.003 - a2 0.057 0.057 0.057 0.092 0.092 0.092 0.092 0.002 - b 0.017 0.017 0.017 0.017 0.017 0.017 0.017 0.003 - c 0.009 0.009 0.009 0.011 0.011 0.011 0.011 0.001 - d 0.193 0.341 0.390 0.406 0.504 0.606 0.704 0.004 1, 3 e 0.236 0.236 0.236 0.406 0.406 0.406 0.406 0.008 - e1 0.154 0.154 0.154 0.295 0.295 0.295 0.295 0.004 2, 3 e 0.050 0.050 0.050 0.050 0.050 0.050 0.050 basic - l 0.025 0.025 0.025 0.030 0.030 0.030 0.030 0.009 - l1 0.041 0.041 0.041 0.056 0.056 0.056 0.056 basic - h 0.013 0.013 0.013 0.020 0.020 0.020 0.020 reference - n 8 14 16 16 20 24 28 reference - rev. m 2/07 notes: 1. plastic or metal protrusions of 0.006? maximum per side are not included. 2. plastic interlead protrusions of 0.010? maximum per side are not included. 3. dimensions ?d? and ?e1? are measured at datum plane ?h?. 4. dimensioning and tolerancing per asme y14.5m - 1994
15 all intersil u.s. products are manufactured, asse mbled and tested utilizing iso9000 quality systems. intersil corporation?s quality certifications ca n be viewed at www.intersil.com/design/quality intersil products are sold by description only. intersil corpor ation reserves the right to make changes in circuit design, soft ware and/or specifications at any time without notice. accordingly, the reader is cautioned to verify that data sheets are current before placing orders. information furnishe d by intersil is believed to be accurate and reliable. however, no responsibility is assumed by intersil or its subsidiaries for its use; nor for any infringements of paten ts or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of intersil or its subsidiari es. for information regarding intersil corporation and its products, see www.intersil.com fn6153.2 june 28, 2007 isl28136, ISL28236 mini so package family (msop) 1 (n/2) (n/2)+1 n plane seating n leads 0.10 c pin #1 i.d. e1 e b detail x 3 3 gauge plane see detail "x" c a 0.25 a2 a1 l 0.25 c a b d a m b e c 0.08 c a b m h l1 mdp0043 mini so package family symbol millimeters tolerance notes msop8 msop10 a1.101.10 max. - a1 0.10 0.10 0.05 - a2 0.86 0.86 0.09 - b 0.33 0.23 +0.07/-0.08 - c0.180.18 0.05 - d 3.00 3.00 0.10 1, 3 e4.904.90 0.15 - e1 3.00 3.00 0.10 2, 3 e0.650.50 basic - l0.550.55 0.15 - l1 0.95 0.95 basic - n 8 10 reference - rev. d 2/07 notes: 1. plastic or metal protrusions of 0.15mm maximum per side are not included. 2. plastic interlead protrusions of 0.25mm maximum per side are not included. 3. dimensions ?d? and ?e1? are measured at datum plane ?h?. 4. dimensioning and tolerancing per asme y14.5m-1994.

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