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1 ? fn7192 caution: these devices are sensitive to electrostatic discharge; follow proper ic handling procedures. 1-888-intersil or 321-724-7143 | intersil (and design) is a registered trademark of intersil americas inc. copyright ? intersil americas inc. 2004. all rights reserved. elantec is a registered trademark of elantec semiconductor, inc. all other trademarks mentioned are the property of their respective owners. el5292, el5292a dual 600mhz current feedback amplifier with enable the el5292 and el5292a represent dual current feedback amplifiers with a very high bandwidth of 600mhz. this makes these amplifiers ideal for today?s high speed video and monitor applications. with a supply current of just 6ma per amplifier and the ability to run from a single supply voltage from 5v to 10v, these amplifiers are also ideal for hand held, portable or battery powered equipment. the el5292a also incorporates an enable and disable function to reduce the supply current to 100a typical per amplifier. allowing the ce pin to float or applying a low logic level will enable the amplifier. the el5292 is offered in the industry-standard 8-pin so package and the space-saving 8-pin msop package. the el5292a is available in a 10-pin msop package and all operate over the industrial temperature range of -40 c to +85 c. pinouts features 600mhz -3db bandwidth 6ma supply current (per amplifier) single and dual supply operation, from 5v to 10v fast enable/disable (el5292a only) single (el5192) and triple (el5392) available high speed, 1ghz product available (el5191) low power, 4ma, 300mhz product available (el5193, el5293, and el5393) applications video amplifiers cable drivers rgb amplifiers test equipment instrumentation current to voltage converters 1 2 3 4 8 7 6 5 el5292 (8-pin so, msop) top view 1 2 3 4 10 9 8 7 5 6 el5292a (10-pin msop) top view - + - + - + - + outa ina- ina+ vs- vs+ outb inb- inb+ ina+ cea vs- ceb ina- outa vs+ outb inb+ inb- ordering information part number package tape & reel pkg. no. el5292cs 8-pin so - mdp0027 EL5292CS-T7 8-pin so 7? mdp0027 el5292cs-t13 8-pin so 13? mdp0027 el5292cy 8-pin msop - mdp0043 el5292cy-t7 8-pin msop 7? mdp0043 el5292cy-t13 8-pin msop 13? mdp0043 el5292acy 10-pin msop - mdp0043 el5292acy-t7 10-pin msop 7? mdp0043 el5292acy-t13 10-pin msop 13? mdp0043 data sheet january 22, 2004 n o t r e c o m m e n d e d f o r n e w d e s i g n s s e e e l 5 2 6 0 , e l 5 2 6 3
2 absolute maximum ratings (t a = 25c) supply voltage between v s + and v s - . . . . . . . . . . . . . . . . . . . . . 11v maximum continuous output current . . . . . . . . . . . . . . . . . . . 50ma operating junction temperature . . . . . . . . . . . . . . . . . . . . . . . 125c power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see curves pin voltages. . . . . . . . . . . . . . . . . . . . . . . . . v s - -0.5v to v s + +0.5v storage temperature . . . . . . . . . . . . . . . . . . . . . . . . -65c to +150c operating temperature . . . . . . . . . . . . . . . . . . . . . . . -40c to +85c caution: stresses above those listed in ?absolute maximum ratings? may cause permanent damage to the device. this is a stress o nly rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. 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 s + = +5v, v s - = -5v, r f = 750 ? for a v = 1, r f = 375 ? for a v = 2, r l = 150 ? , t a = 25c unless otherwise specified. parameter description conditions min typ max unit ac performance bw -3db bandwidth a v = +1 600 mhz a v = +2 300 mhz bw1 0.1db bandwidth 25 mhz sr slew rate v o = -2.5v to +2.5v, a v = +2 2000 2300 v/s t s 0.1% settling time v out = -2.5v to +2.5v, a v = -1 9 ns c s channel separation f = 5mhz 60 db e n input voltage noise 4.1 nv/ hz i n - in- input current noise 20 pa/ hz i n + in+ input current noise 50 pa/ hz dg differential gain error (note 1) a v = +2 0.015 % dp differential phase error (note 1) a v = +2 0.04 dc performance v os offset voltage -10 1 10 mv t c v os input offset voltage temperature coefficient measured from t min to t max 5v/c r ol transimpediance 200 400 k ? input characteristics cmir common mode input range 3 3.3 v cmrr common mode rejection ratio 42 50 db +i in + input current -60 3 60 a -i in - input current -35 4 35 a r in input resistance 37 k ? c in input capacitance 0.5 pf output characteristics v o output voltage swing r l = 150 ? to gnd 3.4 3.7 v r l = 1k ? to gnd 3.8 4.0 v i out output current r l = 10 ? to gnd 95 120 ma supply i son supply current - enabled no load, v in = 0v 5 6 7.5 ma i soff supply current - disabled no load, v in = 0v 100 150 a el5292, el5292a
3 note: 1. standard ntsc test, ac signal amplitude = 286mv p-p , f = 3.58mhz psrr power supply rejection ratio dc, v s = 4.75v to 5.25v 55 75 db -ipsr - input current power supply rejection dc, v s = 4.75 to 5.25v -2 2 a/v enable (el5292a only) t en enable time 40 ns t dis disable time 600 ns i ihce ce pin input high current ce = v s +0.86a i ilce ce pin input low current ce = v s -0-0.1a v ihce ce input high voltage for power-down v s + - 1 v v ilce ce input low voltage for power-down v s + - 3 v electrical specifications v s + = +5v, v s - = -5v, r f = 750 ? for a v = 1, r f = 375 ? for a v = 2, r l = 150 ? , t a = 25c unless otherwise specified. (continued) parameter description conditions min typ max unit el5292, el5292a
4 typical perfor mance curves frequency response for various r l 1m 10m 100m 1g frequency (hz) normalized magnitude (db) 6 2 -2 -6 -10 -14 a v =2 r f =375 ? r l =100 ? r l =150 ? r l =500 ? non-inverting frequency response (gain) 1m 10m 100m 1g frequency (hz) normalized magnitude (db) 6 2 -2 -6 -10 -14 r f =750 ? r l =150 ? a v =2 a v =5 a v =10 a v =1 non-inverting frequency response (phase) 1m 10m 100m 1g frequency (hz) phase () 90 0 -90 -180 -270 -360 r f =750 ? r l =150 ? a v =5 a v =1 a v =2 a v =10 inverting frequency response (gain) 1m 10m 100m 1g frequency (hz) normalized magnitude (db) 6 2 -2 -6 -10 -14 r f =375 ? r l =150 ? a v =-1 a v =-2 a v =-5 inverting frequency response (phase) 1m 10m 100m 1g frequency (hz) phase () 90 0 -90 -180 -270 -360 r f =375 ? r l =150 ? a v =-1 a v =-2 a v =-5 frequency response for various c in - 1m 10m 1g frequency (hz) normalized magnitude (db) 10 6 2 -2 -6 -10 100m a v =2 r f =375 ? r l =150 ? 2pf added 1pf added 0pf added el5292, el5292a
5 typical performa nce curves (continued) frequency response for various c l 1m 10m 100m 1g frequency (hz) normalized magnitude (db) 14 10 6 2 -2 -6 a v =2 r f =375 ? r l =150 ? 8pf added 0pf added 12pf added frequency response for various r f 1m 10m 100m 1g frequency (hz) normalized magnitude (db) 6 2 -2 -6 -10 -14 a v =2 r g =r f r l =150 ? 250 ? 375 ? 475 ? 620 ? 750 ? group delay vs frequency 1m 10m 1g frequency (hz) group delay (ns) 3.5 3 2 1 0.5 0 100m frequency response for various common-mode input voltages 1m 10m 1g frequency (hz) normalized magnitude (db) 6 2 -2 -6 -10 -14 100m a v =2 r f =375 ? a v =1 r f =750 ? a v =2 r f =375 ? r l =150 ? v cm =3v v cm =0v v cm =-3v 2.5 1.5 transimpedance (rol) vs frequency 1k frequency (hz) 10k 100k 1m 10m 100m 1g 10m 100 1k 10k 100k 1m magnitude ( ? ) -90 -180 -270 -360 0 phase () psrr and cmrr vs frequency psrr/cmrr (db) 20 -80 -60 -40 -20 0 10k frequency (hz) 100k 1m 10m 1g 100m gain phase psrr+ psrr- cmrr el5292, el5292a
6 typical performa nce curves (continued) -3db bandwidth vs supply voltage for non- inverting gains 567 10 total supply voltage (v) -3db bandwidth (mhz) 800 600 400 200 0 -3db bandwidth vs supply voltage for inverting gains total supply voltage (v) -3db bandwidth (mhz) 350 300 150 100 50 0 peaking vs supply voltage for non-inverting gains total supply voltage (v) peaking (db) 4 3 2 1 0 89 r f =750 ? r l =150 ? a v =1 a v =2 a v =5 a v =10 567 10 89 567 10 89 250 200 r f =375 ? r l =150 ? r f =750 ? r l =150 ? a v =1 a v =-1 a v =-2 a v =-5 a v =2 a v =10 peaking vs supply voltage for inverting gains total supply voltage (v) peaking (db) 4 3 2 1 0 r f =375 ? r l =150 ? a v =-1 567 10 89 a v =-2 a v =-5 -3db bandwidth vs temperature for non-inverting gains 1400 1200 1000 600 400 200 0 -40 10 60 160 ambient temperature (c) -3db bandwidth (mhz) 800 a v =1 -3db bandwidth vs temperature for inverting gains 500 400 300 100 0 -40 10 60 160 ambient temperature (c) -3db bandwidth (mhz) 200 110 a v =2 r f =750 ? r l =150 ? a v =5 a v =10 110 a v =-1 r f =375 ? r l =150 ? a v =-2 a v =-5 el5292, el5292a
7 typical performa nce curves (continued) peaking vs temperature 2 1 0.5 0 -0.5 -50 0 50 100 ambient temperature (c) peaking (db) 1.5 r l =150 ? -50 a v =1 a v =2 a v =-1 a v =-2 voltage and current noise vs frequency 100 frequency (hz) 1k 10k 100k 10m 1m i n + i n - e n voltage noise (nv/ hz) current noise (pa/ hz) 1k 1 10 100 supply current (ma) 10 0 4 8 2 6 0 supply voltage (v) supply current vs supply voltage 12 210 8 6 4 closed loop output impedance vs frequency frequency (hz) output impedance ( ? ) 100 0.001 0.1 10 0.01 1 100 10k 100m 1g 1m 100k 10m 1k 2nd and 3rd harmonic distortion vs frequency 1 frequency (mhz) 10 100 harmonic distortion (dbc) -20 -100 -30 -80 -50 -70 -40 -90 -60 a v =+2 v out =2v p-p r l =100 ? 10 frequency (mhz) 100 200 input power intercept (dbm) 30 -15 10 15 20 25 -10 -5 0 5 a v =+2 r l =150 ? two-tone 3rd order input referred intermodulation intercept (iip3) a v =+2 r l =100 ? 3rd order distortion 2nd order distortion el5292, el5292a
8 typical performa nce curves (continued) 0.03 0.02 0.01 0 -0.01 -0.02 -0.03 -0.04 -0.05 dg (%) or dp () -1 -0.5 0 0.5 1 dp dg a v =2 r f =r g =375 ? r l =150 ? 0.03 0.02 0.01 0 -0.02 -0.03 -0.04 -0.05 -0.06 dg (%) or dp () -1 -0.5 0 0.5 1 dp dg a v =1 r f =750 ? r l =500 ? -0.01 differential gain/phase vs dc input voltage at 3.58mhz dc input voltage differential gain/phase vs dc input voltage at 3.58mhz dc input voltage output voltage swing vs frequency thd<1% 1 frequency (mhz) 10 100 output voltage swing (v pp ) 9 0 5 6 7 8 1 frequency (mhz) 10 100 output voltage swing (v pp ) 10 0 2 4 6 8 output voltage swing vs frequency thd<0.1% 1 2 3 4 a v =2 small signal step response large signal step response 200mv/div 10ns/div 1v/div 10ns/div v s =5v r l =150 ? a v =2 r f =r g =375 ? v s =5v r l =150 ? a v =2 r f =r g =375 ? r l =500 ? r l =150 ? a v =2 r l =500 ? r l =150 ? el5292, el5292a
9 typical performa nce curves (continued) settling time vs settling accuracy 25 20 15 10 5 0 settling time (ns) 0.01 0.1 1 settling accuracy (%) a v =2 r f =r g =375 ? r l =150 ? v step =5v p-p output transimpedance (roi) vs temperature 500 450 350 300 -40 10 60 110 160 die temperature (c) roi (k ? ) 400 icmr and ipsr vs temperature 2.5 2 1 0.5 0 -0.5 -1 -40 10 60 110 160 die temperature (c) icmr/ipsr (a/v) 1.5 icmr+ icmr- ipsr offset voltage vs temperature 3 1 0 -1 -2 -40 10 60 110 160 die temperature (c) v os (mv) 2 psrr and cmrr vs temperature 90 80 60 50 40 30 20 10 -40 10 60 110 160 die temperature (c) psrr/cmrr (db) 70 psrr cmrr input current vs temperature 60 40 20 -20 -40 -60 -80 -40 10 110 160 temperature (c) input current (a) 0 60 ib+ ib- el5292, el5292a
10 typical performa nce curves (continued) positive input resistance vs temperature 50 45 30 20 15 10 0 -40 10 160 temperature (c) r in + (k ? ) 25 110 60 35 40 5 supply current vs temperature 8 4 3 2 1 0 -40 10 110 160 temperature (c) supply current (ma) 60 5 6 7 positive output swing vs temperature for various loads 4.2 4.1 4 3.8 3.7 3.6 3.5 -40 10 50 160 temperature (c) v out (v) 3.9 negative output swing vs temperature for various loads -3.5 -3.6 -3.7 -3.9 -4 -4.1 -4.2 -40 10 110 160 temperature (c) v out (v) -3.8 110 150 ? 1k ? 60 150 ? 1k ? slew rate vs temperature 4600 4400 4000 3800 3600 3400 3200 3000 -40 10 60 110 160 die temperature (c) slew rate (v/s) 4200 a v =2 r f =r g =375 ? r l =150 ? output current vs temperature 135 130 125 120 115 -40 10 60 110 160 die temperature (c) i out (ma) sink source el5292, el5292a
11 typical performa nce curves (continued) channel-to-channel isolation vs frequency 100k 1m 10m 100m frequency (hz) gain (db) 0 -20 -40 -60 -80 -100 400m package power dissipation vs ambient temperature jedec jesd51-3 low effective thermal conductivity test board 0.7 0.6 0.5 0.3 0.2 0.1 0 0 50 100 150 ambient temperature (c) power dissipation (w) 0.4 25 75 125 625mw s o8 160c/w 85 package power dissipation vs ambient temperature jedec jesd51-3 low effective thermal conductivity test board 0.6 0 0.3 power dissipation (w) 0.5 0.1 0 100 75 50 25 ambient temperature (c) 125 0.2 0.4 85 486mw m s o p 8 / 1 0 2 0 6 c / w disable response 400ns/div 500mv/div 5v/div enable response 20ns/div 500mv/div 5v/div el5292, el5292a
12 applications information product description the el5292 is a current-feedback operational amplifier that offers a wide -3db bandwidth of 600mhz and a low supply current of 6ma per amplifier. the el5292 works with supply voltages ranging from a single 5v to 10v and they are also capable of swinging to within 1v of either supply on the output. because of their current-feedback topology, the el5292 does not have the normal gain-bandwidth product associated with voltage-feedback operational amplifiers. instead, its -3db bandwidth to remain relatively constant as closed-loop gain is increased. this combination of high bandwidth and low power, together with aggressive pricing make the el5292 the ideal choice for many low-power/high- bandwidth applications such as portable, handheld, or battery-powered equipment. for varying bandwidth needs, consider the el5191 with 1ghz on a 9ma supply current or the el5193 with 300mhz on a 4ma supply current. versions include single, dual, and triple amp packages with 5-pin sot23, 16-pin qsop, and 8- pin or 16-pin so outlines. power supply bypassing and printed circuit board layout as with any high frequency device, good printed circuit board layout is necessary for optimum performance. low impedance ground plane construction is essential. surface mount components are recommended, but if leaded components are used, lead lengths should be as short as possible. the power supply pins must be well bypassed to reduce the risk of oscillation. the combination of a 4.7f tantalum capacitor in parallel with a 0.01f capacitor has been shown to work well when placed at each supply pin. pin descriptions 8-pin so/msop 10-pin msop pin name function equivalent circuit 1 9 outa output, channel a circuit 1 2 10 ina- inverting input, channel a circuit 2 3 1 ina+ non-inverting input, channel a (see circuit 2) 2cea chip enable, channel a circuit 3 4 3 vs- negative supply 4ceb chip enable, channel b (see circuit 3) 5 5 inb+ non-inverting input, channel b (see circuit 2) 6 6 inb- inverting input, channel b (see circuit 2) 7 7 outb output, channel b (see circuit 1) 8 8 vs+ positive supply v s + v s - out in- in+ v s + v s - v s + v s - ce el5292, el5292a
13 for good ac performance, parasitic capacitance should be kept to a minimum, especially at the inverting input. (see the capacitance at the inverting input section) even when ground plane construction is used, it should be removed from the area near the inverting input to minimize any stray capacitance at that node. carbon or metal-film resistors are acceptable with the metal-film resistors giving slightly less peaking and bandwidth because of additional series inductance. use of sockets, particularly for the so package, should be avoided if possible. sockets add parasitic inductance and capacitance which will result in additional peaking and overshoot. disable/power-down the el5292a amplifier can be disabled placing its output in a high impedance state. when disabled, the amplifier supply current is reduced to < 300a. the el5292a is disabled when its ce pin is pulled up to within 1v of the positive supply. similarly, the amplifier is enabled by floating or pulling its ce pin to at least 3v below the positive supply. for 5v supply, this means that an el5292a amplifier will be enabled when ce is 2v or less, and disabled when ce is above 4v. although the logic levels are not standard ttl, this choice of logic voltages allows the el5292a to be enabled by tying ce to ground, even in 5v single supply applications. the ce pin can be driven from cmos outputs. capacitance at the inverting input any manufacturer?s high-speed voltage- or current-feedback amplifier can be affected by stray capacitance at the inverting input. for inverting gains, this parasitic capacitance has little effect because the inverting input is a virtual ground, but for non-inverting gains, this capacitance (in conjunction with the feedback and gain resistors) creates a pole in the feedback path of the amplifier. this pole, if low enough in frequency, has the same destabilizing effect as a zero in the forward open-loop response. the use of large- value feedback and gain resistors exacerbates the problem by further lowering the pole frequency (increasing the possibility of oscillation.) the el5292 has been optimized with a 375 ? feedback resistor. with the high bandwidth of these amplifiers, these resistor values might cause stability problems when combined with parasitic capacitance, thus ground plane is not recommended around the inverting input pin of the amplifier. feedback resistor values the el5292 has been designed and specified at a gain of +2 with r f approximately 375 ? . this value of feedback resistor gives 300mhz of -3db bandwidth at a v =2 with 2db of peaking. with a v =-2, an r f of 375 ? gives 275mhz of bandwidth with 1db of peaking. since the el5292 is a current-feedback amplifier, it is also possible to change the value of r f to get more bandwidth. as seen in the curve of frequency response for various r f and r g , bandwidth and peaking can be easily modified by varying the value of the feedback resistor. because the el5292 is a current-feedback amplifier, its gain-bandwidth product is not a constant for different closed- loop gains. this feature actually allows the el5292 to maintain about the same -3db bandwidth. as gain is increased, bandwidth decreases slightly while stability increases. since the loop stability is improving with higher closed-loop gains, it becomes possible to reduce the value of r f below the specified 375 ? and still retain stability, resulting in only a slight loss of bandwidth with increased closed-loop gain. supply voltage range and single-supply operation the el5292 has been designed to operate with supply voltages having a span of greater than 5v and less than 10v. in practical terms, this means that the el5292 will operate on dual supplies ranging from 2.5v to 5v. with single- supply, the el5292 will operate from 5v to 10v. as supply voltages continue to decrease, it becomes necessary to provide input and output voltage ranges that can get as close as possible to the supply voltages. the el5292 has an input range which extends to within 2v of either supply. so, for example, on 5v supplies, the el5292 has an input range which spans 3v. the output range of the el5292 is also quite large, extending to within 1v of the supply rail. on a 5v supply, the output is therefore capable of swinging from - -4v to +4v. single-supply output range is larger because of the increased negative swing due to the external pull-down resistor to ground. video performance for good video performance, an amplifier is required to maintain the same output impedance and the same frequency response as dc levels are changed at the output. this is especially difficult when driving a standard video load of 150 ? , because of the change in output current with dc level. previously, good differential gain could only be achieved by running high idle currents through the output transistors (to reduce variations in output impedance.) these currents were typically comparable to the entire 6ma supply current of each el5292 amplifier. special circuitry has been incorporated in the el5292 to reduce the variation of output impedance with current output. this results in dg and dp specifications of 0.015% and 0.04, while driving 150 ? at a gain of 2. video performance has also been measured with a 500 ? load at a gain of +1. under these conditions, the el5292 has dg and dp specifications of 0.03% and 0.05, respectively. output drive capability in spite of its low 6ma of supply current, the el5292 is capable of providing a minimum of 95ma of output current. with a minimum of 95ma of output drive, the el5292 is el5292, el5292a
14 all intersil u.s. products are manufactured, asse mbled and tested utilizing iso9000 quality systems. intersil corporation?s quality certifications can be viewed at www.intersil.com/design/quality intersil products are sold by description only. intersil corporation 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 capable of driving 50 ? loads to both rails, making it an excellent choice for driving isolation transformers in telecommunications applications. driving cables and capacitive loads when used as a cable driver, double termination is always recommended for reflection-free performance. for those applications, the back-termination series resistor will decouple the el5292 from the cable and allow extensive capacitive drive. however, other applications may have high capacitive loads without a back-termination resistor. in these applications, a small series resistor (usually between 5 ? and 50 ? ) can be placed in series with the output to eliminate most peaking. the gain resistor (r g ) can then be chosen to make up for any gain loss which may be created by this additional resistor at the output. in many cases it is also possible to simply increase the value of the feedback resistor (r f ) to reduce the peaking. current limiting the el5292 has 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 with the high output drive capability of the el5292, it is possible to exceed the 125c absolute maximum junction temperature under certain very high load current conditions. generally speaking when r l falls below about 25 ? , it is important to calculate the maximum junction temperature (t jmax ) for the application to determine if power supply voltages, load conditions, or package type need to be modified for the el5292 to remain in the safe operating area. these parameters are calculated as follows: where: t max = maximum ambient temperature ja = thermal resistance of the package n = number of amplifiers in the package pd max = maximum power dissipation of each amplifier in the package pd max for each amplifier can be calculated as follows: where: v s = supply voltage i smax = maximum supply current of 1a v outmax = maximum output voltage (required) r l = load resistance t jmax t max ja npd max () + = pd max 2 ( v s i smax ) v s ( - v outmax ) v outmax r l ---------------------------- + = el5292, el5292a

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