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1 ? fn7309.2 EL5170, el5370 100mhz differential twisted-pair drivers the EL5170 and el5370 are single and triple high bandwidth amplifiers with a fixed gain of 2. they are primarily targeted for applications such as driving twisted- pair lines in component video applications. the inputs signal can be in either single-ended or differential form but the outputs are always in differential form. the output common mode level for each channel is set by the associated v ref pin, which have a -3db bandwidth of over 70mhz. generally, these pins are grounded but can be tied to any voltage reference. all outputs are short circuit protected to withstand temporary overload condition. the EL5170 and el5370 are specified for operation over the full -40c to +85c temperature range. features fully differential inputs and outputs differential input range 2.3v typ. 100mhz 3db bandwidth at fixed gain of 2 1200v/s slew rate single 5v or dual 5v supplies 50ma maximum output current low power - 7.4ma per channel applications twisted-pair driver differential line driver vga over twisted-pair adsl/hdsl driversingle ended to differential amplification transmission of analog signals in a noisy environment pinouts EL5170 (8-pin so, msop) top view el5370 (24-pin qsop) top view 1 2 3 4 8 7 6 5 - + in+ en in- ref out+ vs- vs+ out- 1 2 3 4 16 15 14 13 5 6 7 12 11 9 8 10 20 19 18 17 24 23 22 21 - + en inp1 inn1 ref1 nc inp2 inn2 ref2 nc inp3 inn3 ref3 out1 out1b nc vsp vsn nc out2 out2b nc out3 out3b nc - + - + ordering information part number package tape & reel pkg. dwg. # EL5170is 8-pin so - mdp0027 EL5170is-t7 8-pin so 7? mdp0027 EL5170is-t13 8-pin so 13? mdp0027 EL5170iy 8-pin msop - mdp0043 EL5170iy-t7 8-pin msop 7? mdp0043 EL5170iy-t13 8-pin msop 13? mdp0043 el5370iu 24-pin qsop - mdp0040 el5370iu-t7 24-pin qsop 7? mdp0040 el5370iu-t13 24-pin qsop 13? mdp0040 data sheet january 8, 2004 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.
2 important note: all parameters having min/max specifications are guaranteed. typ values are for information purposes only. unles s otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: t j = t c = t a absolute maximum ratings (t a = 25c) supply voltage (v s + to v s -) . . . . . . . . . . . . . . . . . . . . . . . . . . 12.6v maximum output current. . . . . . . . . . . . . . . . . . . . . . . . . . . . 60ma storage temperature range . . . . . . . . . . . . . . . . . .-65c to +150c operating junction temperature . . . . . . . . . . . . . . . . . . . . . . +135c recommended 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. electrical specifications v s + = +5v, v s - = -5v, t a = 25c, v in = 0v, a v = 2, r ld = 200 ? , c ld = 1pf, unless otherwise specified. parameter description conditions min typ max unit ac performance bw -3db bandwidth 100 mhz bw 0.1db bandwidth 12 mhz sr slew rate (EL5170) v out = 2v p-p , 20% to 80% 800 1100 v/s sr (el5370) slew rate (el5370) v out = 2v p-p , 20% to 80% 1000 1200 v/s t stl settling time to 0.1% v out = 2v p-p 20 ns t ovr output overdrive recovery time 40 ns v ref bw (-3db) v ref -3db bandwidth a v =1, c ld = 2.7pf 70 mhz v ref sr+ v ref slew rate - rise v out = 2v p-p , 20% to 80% 125 v/s v ref sr- v ref slew rate - fall v out = 2v p-p , 20% to 80% 65 v/s v n input voltage noise f = 10khz 28 nv/ hz hd2 second harmonic distortion v out = 2v p-p , 1mhz -79 dbc hd2 second harmonic distortion v out = 2v p-p , 10mhz -65 dbc hd3 third harmonic distortion v out = 2v p-p , 1mhz -62 dbc hd3 third harmonic distortion v out = 2v p-p , 10mhz -43 dbc dg differential gain at 3.58mhz r ld = 300 ? , a v = 2 0.14 % d differential phase at 3.58mhz r ld = 300 ? , a v = 2 0.38 e s channel separation - for el5370 only at f = 1mhz 85 db input characteristics v os input referr ed offset volt age 6 25 mv i in input bias current (v in , v inb )-10-6-2a i ref input bias current at ref pin 0.5 1.25 3 a gain gain accuracy v in = 1v 1.98 2 2.02 v r in differential input resistance 300 k ? c in differential input capacitance 1pf dmir differential mode input range 2.1 2.3 v cmir+ common mode positive input range at v in +, v in -3.23.4v cmir- common mode negative input range at v in +, v in - -4.5 -4.2 v v refin reference input voltage range - positive v in + = v in - = 0v 3.4 3.8 v reference input voltage range - negative -3.3 -3 v v refos output offset relative to v ref 10 60 100 mv EL5170, el5370
3 cmrr input common mode rejection ratio v in = 2.5v 65 84 db output characteristics v out (EL5170) positive output voltage swing r ld = 200 ? 3.3 3.6 v negative output voltage swing -3.3 -3 v v out (el5370) positive output voltage swing r ld = 200 ? 3.7 4 v negative output voltage swing -3.7 -3.4 v i out (max) maximum output current r l = 10 ? (EL5170) 50 80 ma r l = 10 ? (el5370) 70 85 ma r out output impedance 60 m ? supply v supply supply operating range v s + to v s -4.7511v i s(on) power supply current - per channel 6 7.4 8.4 ma i s(off) + positive power supply current - disabled en pin tied to 4.8v (EL5170) 60 80 100 a i s(off) - negative power supply current - disabled -150 -120 -90 a i s(off) + positive power supply current - disabled en pin tied to 4.8v (el5370) 0.5 2 5 a i s(off) - negative power supply current - disabled -150 -120 -90 a psrr power supply rejection ratio v s from 4.5v to 5.5v (EL5170) 70 83 db v s from 4.5v to 5.5v (el5370) 65 83 db enable t en enable time 200 ns t ds disable time 1s v ih en pin voltage for power-up v s + -1.5 v v il en pin voltage for shut-down v s + -0.5 v i ih-en en pin input current high - per channel at v en = 5v 40 50 a i il-en en pin input current low - per channel at v en = 0v -6 -3 a electrical specifications v s + = +5v, v s - = -5v, t a = 25c, v in = 0v, a v = 2, r ld = 200 ? , c ld = 1pf, unless otherwise specified. (continued) parameter description conditions min typ max unit pin descriptions EL5170 el5370 pin name pin function 1 2, 6, 10 in+, inp1, 2, 3 non-inverting inputs 21en enable 3 3, 7, 11 in-, inn1, 2, 3 inverting inputs 4 4, 8, 12 ref1, 2, 3 reference input, sets common-mode output voltage 5 14, 17, 23 out-, out1b, 2b, 3b inverting outputs 6 21 vs+, vsp positive supply 7 20 vs-, vsn negative supply 8 15, 18, 24 out+, out1, 2, 3 non-inverting outputs 5, 9, 13, 16, 19, 22 nc no connects, grounded for best crosstalk performance EL5170, el5370
4 connection diagrams inp en inn ref out vsn vsp outb 1 2 3 4 8 7 6 5 inp en inn ref r s1 50 ? r s2 50 ? r s3 50 ? 50 ? loadn r rt2 loadp -5v +5v EL5170 r rt2 50 ? el5370 1 2 3 4 16 15 14 13 5 6 7 12 11 9 8 10 20 19 18 17 24 23 22 21 en inp1 inn1 ref1 nc inp2 inn2 ref2 nc inp3 inn3 ref3 out1 out1b nc vsp vsn nc out2 out2b nc out3 out3b nc r sr3 50 ? r sn3 50 ? r sp3 50 ? r sr2 50 ? r sn2 50 ? r sp2 50 ? r sr1 50 ? r sn1 50 ? r sp1 50 ? inp1 inn1 ref1 inp2 inn2 ref2 inp3 inn3 ref3 enable -5v +5v 50 ? r rt3b ld3b 50 ? r rt3 ld3 50 ? r rt2b ld2b 50 ? r rt2 ld2 50 ? r rt1b ld1b 50 ? r rt1 ld1 EL5170, el5370
5 typical perfor mance curves figure 1. frequency response figure 2. small signal frequency response vs r ld figure 3. small signal frequency response vs c ld figure 4. frequency response vs v ref figure 5. power supply rejection ratio vs frequency figure 6. common mode rejection vs frequency 100k frequency (hz) 10m 100m 1g gain (db) 6 5 4 3 2 1 0 7 8 9 10 v s = 5v, a v = 2, r ld = 200 ?, c ld = 1pf v op-p = 2v v op-p = 1v v op-p = 200mv 1m 1m 100m 1g frequency (hz) 100k gain (db) 6 5 4 3 2 1 0 7 8 9 10 c ld = 1pf, v odp-p = 200mv 10m r ld = 1k ? r ld = 100 ? r ld = 500 ? r ld = 200 ? 100k frequency (hz) 10m 100m 1g gain (db) 7 6 5 4 3 2 1 8 9 10 11 v s = 5v, r ld = 200 ?, v odp-p = 200mv c ld = 0pf c ld = 20pf c ld = 40pf c ld = 75pf 1m 100m frequency (hz) 1m gain (db) 0 -1 -2 -3 -4 -5 -6 1 2 3 4 10m v ref = 200mv p-p v ref = 1v p-p 0 -10 -30 -50 -60 -80 -90 1m 10m 100m psrr (db) frequency (hz) -70 -40 -20 100k psrr- psrr+ 100k 1m 10m 100m frequency (hz) common mode rejection (db) -10 -30 -50 -60 -80 -90 -70 -40 -20 - + v ocm v odm 100 ? 100 ? v ocm /v incm v odm /v incm v incm EL5170, el5370
6 figure 7. differential mode output balance error vs frequency figure 8. input voltage noise vs frequency figure 9. channel isolation vs frequency figure 10. bandwidth vs supply voltage figure 11. supply current vs supply voltage figure 12. harmonic distortion vs frequency typical perfor mance curves (continued) 100k 1m 10m 100m frequency (hz) balance error (db) 0 -10 -20 -30 -40 -50 -60 v in - + v cm v odm 100 ? 100 ? r t r v ocm /v odm 10 100 1000 10 100 1k 10k 100k 1m 10m freqency (hz) voltage noise (nv/ hz) -110 -70 100k 1m 10m 100m freqency (hz) channel isolation (db) -100 -90 -80 -60 -50 -40 ch1<=>ch3 ch3<=>ch1 ch1<=>ch2 ch2<=>ch3 ch2<=>ch1 ch3<=>ch2 80 85 90 95 105 110 4689 12 v s (v) bw (mhz) 100 57 10 r ld = 200 ? 11 7.58 7.62 7.68 7.76 7.78 468911 v s (v) i s (ma) 7.72 7.64 57 10 7.74 7.7 7.66 7.6 i s + i s - -50 -30 02 6 1012 1820 frequency (mhz) distortion (db) 414 -40 -70 -60 -90 -80 v s = 5v, r ld = 200 ?, v op-p = 2v 8 16 hd3 hd2 EL5170, el5370
7 figure 13. v com transient response figure 14. large signal transient response figure 15. small signal transient response figure 16. disabled response figure 17. enabled response figure 18. package power dissipation vs ambient temperature typical perfor mance curves (continued) 40ns/div 0.5v/div 20ns/div 500mv/div 20ns/div 1 00mv/div 486mw ja =206c/w msop8 870mw ja =115c/w qsop24 1.2 1 0.8 0.6 0.4 0 0 25 50 75 100 150 ambient temperature (c) power dissipation (w) 125 85 jedec jesd51-3 low effective thermal conductivity test board 0.2 625mw ja =160c/w so8 EL5170, el5370
8 simplified schematic description of operation and application information product description the EL5170 and el5370 are wide bandwidth, low power and single/differential ended to differential output amplifiers. they have a fixed gain of 2. the EL5170 is a single channel differential amplifier. the el5370 is a triple channel differential amplifier. the EL5170 and el5370 have a ?3db bandwidth of 100mhz while driving a 200 ? differential load. the EL5170 and el5370 are available with a power down feature to reduce the power while the amplifiers are disabled. input, output and supply voltage range the EL5170 and el5370 have been designed to operate with a single supply voltage of 5v to 10v or a split supplies with its total voltage from 5v to 10v. the amplifiers have an input common mode voltage range from -4.5v to 3.4v for 5v supply. the differential mode input range (dmir) between the two inputs is from ?2.3v to +2.3v. the input voltage range at the ref pin is from ?3.3v to 3.8v. if the input common mode or differential mode signal is outside the above-specified ranges, it will cause the output signal distorted. the output of the EL5170 and el5370 can swing from ?3.3v to 3.6v at 200 ? differential load at 5v supply. as the load resistance becomes lower, the output swing is reduced. figure 19. package power dissipation vs ambient temperature typical perfor mance curves (continued) 1.136w ja =88c/w qsop24 1.4 1.2 1 0.8 0.6 0.2 0 0 25 50 75 100 150 ambient temperature (c) power dissipation (w) 125 85 jedec jesd51-7 high effective thermal conductivity test board 0.4 909mw ja =110c/w so8 870mw ja =115c/w msop8/10 ref r 10 r 9 r cd r cd out+ out- c c r 6 r 5 c c r 4 r 3 r 7 r 8 r 2 r 1 v b1 fbn fbp in- in+ v b2 v s + v s - 200 ? 200 ? 400 ? EL5170, el5370
9 differential and common mode gain settings as shown at the simplified schematic, since the feedback resistors rf and the gain resistor are integrated with 200 ? and 400 ? , the EL5170 and el5370 have a fixed gain of 2. the common mode gain is always one. driving capacitive loads and cables the EL5170 and el5370 can drive 75pf differential capacitor in parallel with 200 ? differential load with less than 3.5db of peaking. if less peaking is desired in applications, a small series resistor (usually between 5 ? to 50 ? ) can be placed in series with each output to eliminate most peaking. however, this will reduce the gain slightly. when used as a cable driver, double termination is always recommended for reflection-free performance. for those applications, a back-termination series resistor at the amplifier?s output will isolate the amplifier from the cable and allow extensive capacitive drive. however, other applications may have high capacitive loads without a back-termination resistor. again, a small series resistor at the output can help to reduce peaking. disable/power-down the EL5170 and el5370 can be disabled and placed their outputs in a high impedance state. the turn off time is about 1s and the turn on time is about 200ns. when disabled, the amplifier?s supply current is reduced to 2a for i s + and 120a for i s - typically, thereby effectively eliminating the power consumption. the amplifier?s power down can be controlled by standard cmos signal levels at the enable pin. the applied logic signal is relative to v s + pin. letting the en pin float or applying a signal that is less than 1.5v below v s + will enable the amplifier. the amplifier will be disabled when the signal at en pin is above v s + -0.5v. output drive capability the EL5170 and el5370 have internal short circuit protection. its typical short circuit current is 80ma. if the output is shorted indefinitely, the power dissipation could easily increase such that the part will be destroyed. maximum reliability is maintained if the output current never exceeds 60ma. this limit is set by the design of the internal metal interconnect. power dissipation with the high output drive capability of the EL5170 and el5370 it is possible to exceed the 125c absolute maximum junction temperature under certain load current conditions. therefore, it is important to calculate the maximum junction temperature for the application to determine if the load conditions or package types need to be modified for the amplifier to remain in the safe operating area. the maximum power dissipation allowed in a package is determined according to: where: t jmax = maximum junction temperature t amax = maximum ambient temperature ja = thermal resistance of the package the maximum power dissipation actually produced by an ic is the total quiescent supply current times the total power supply voltage, plus the power in the ic due to the load, or: where: v s = total supply voltage i smax = maximum quiescent supply current per channel ? v o = maximum differential output voltage of the application r ld = differential load resistance i load = load current i = number of channels by setting the two pd max equations equal to each other, we can solve the output current and r load to avoid the device overheat. power supply bypassing and printed circuit board layout as with any high frequency device, a good printed circuit board layout is necessary for optimum performance. lead lengths should be as sort as possible. the power supply pin must be well bypassed to reduce the risk of oscillation. for normal single supply operation, where the v s - pin is connected to the ground plane, a single 4.7f tantalum capacitor in parallel with a 0.1f ceramic capacitor from v s + to gnd will suffice. this same capacitor combination should be placed at each supply pin to ground if split supplies are to be used. in this case, the v s - pin becomes the negative supply rail. for good ac performance, parasitic capacitance should be kept to minimum. use of wire wound resistors should be avoided because of their additional series inductance. use of sockets should also be avoided if possible. sockets add parasitic inductance and capacitance that can result in compromised performance. minimizing parasitic capacitance at the amplifier?s inverting input pin is very important. the feedback resistor should be placed very close to the inverting input pin. strip line design techniques are recommended for the signal traces. pd max t jmax t amax ? ja -------------------------------------------- - = p div s i smax v s ? v o r ld ----------- - + ?? ?? ?? = EL5170, el5370
10 typical applications 0 ? v fb v inb v ref el5172/ el5372 EL5170/ el5370 v out 50 50 z o = 100 ? v in 50 ? 50 ? figure 20. twisted pair driver in+ in- figure 21. dual coaxial cable driver in+ in- 0 ? v fb v inb v ref v out v in el5172/ el5372 EL5170/ el5370 + - EL5170/ el5370 in+ in- v in 10v figure 22. single supply twisted pair driver EL5170, el5370
11 so package outline drawing figure 23. dual signal transmission circuit EL5170/ el5370 in+ in- el5172 el5172/ el5372 EL5170, el5370
12 msop package outline drawing EL5170, el5370
13 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 qsop package outline drawing note: the package drawing shown here may not be the latest version. to check the latest revision, please refer to the intersil w ebsite at http://www.intersil.com/design/packages/index.asp EL5170, el5370

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