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1 ? fn7111.1 el5127, el5227, el5327, el5427 2.5mhz 4, 8, 10 & 12 channel rail-to-rail buffers the el5127, el5227, el5327, and el5427 are low power, high voltage rail-to-rail input/output buffers designed for use in reference voltage buffering applications in small lcd displays. they are available in quad (el5127), octal (el5227), 10-channel (el5327), and 12-channel (el5427) topologies. all buffers feature a -3db bandwidth of 2.5mhz and operate from just 133a per buffer. this family also features a continuous output drive capability of 30ma (sink and source). the quad channel el5127 is available in the 10-pin msop package. the 8-channel el5227 is available in both the 20- pin tssop and 24-pin qfn packages, the 10-channel el5327 in the 24-pin tssop and 24-pin qfn packages, and the 12-channel el5427 in the 28-pin tssop and 32-pin qfn packages. all buffers are specified for operation over the full -40c to +85c temperature range. features 2.5mhz -3db bandwidth supply voltage = 4.5v to 16.5v low supply current (per buffer) = 133a high slew rate = 2.2v/s rail-to-rail input/output swing ultra-small packages applications tft-lcd drive circuits electronic games touch-screen displays personal communication devices personal digital assistants (pdas) portable instrumentation data sheet june 15, 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 ordering information part number package tape & reel pkg. dwg. # part number package tape & reel pkg. dwg. # el5127cy 10-pin msop - mdp0043 el5327clz (note) 24-pin qfn (pb-free) - mdp0046 EL5127CY-T7 10-pin msop 7? mdp0043 el5327clz-t7 (note) 24-pin qfn (pb-free) 7? mdp0046 el5127cy-t13 10-pin msop 13? mdp0043 el5327clz-t13 (note) 24-pin qfn (pb-free) 13? mdp0046 el5127cyz (note) 10-pin msop (pb-free) - mdp0043 el5327cr 24-pin tssop - mdp0044 el5127cyz-t7 (note) 10-pin msop (pb-free) 7? mdp0043 el5327cr-t7 24-pin tssop 7? mdp0044 el5127cyz-t13 (note) 10-pin msop (pb-free) 13? mdp0043 el5327cr-t13 24-pin tssop 13? mdp0044 el5227cl 24-pin qfn - mdp0046 el5327crz (note) 24-pin tssop (pb-free) - mdp0044 el5227cl-t7 24-pin qfn 7? mdp0046 el5327crz-t7 (note) 24-pin tssop (pb-free) 7? mdp0044 el5227cl-t13 24-pin qfn 13? mdp0046 el5327crz-t13 (note) 24-pin tssop (pb-free) 13? mdp0044 el5227clz (note) 24-pin qfn (pb-free) - mdp0046 el5427cl 32-pin qfn - mdp0046 el5227clz-t7 (note) 24-pin qfn (pb-free) 7? mdp0046 el5427cl-t7 32-pin qfn 7? mdp0046 el5227clz-t13 (note) 24-pin qfn (pb-free) 13? mdp0046 el5427cl-t13 32-pin qfn 13? mdp0046 el5227cr 20-pin tssop - mdp0044 el5427clz (note) 32-pin qfn (pb-free) - mdp0046 el5227cr-t7 20-pin tssop 7? mdp0044 el5427clz-t7 (note) 32-pin qfn (pb-free) 7? mdp0046 el5227cr-t13 20-pin tssop 13? mdp0044 el5427clz-t13 (note) 32-pin qfn (pb-free) 13? mdp0046 el5227crz (note) 20-pin tssop (pb-free) - mdp0044 el5427cr 28-pin tssop - mdp0044 el5227crz-t7 (note) 20-pin tssop (pb-free) 7? mdp0044 el5427cr-t7 28-pin tssop 7? mdp0044 el5227crz-t13 (note) 20-pin tssop (pb-free) 13? mdp0044 el5427cr-t13 28-pin tssop 13? mdp0044 el5327cl 24-pin qfn - mdp0046 el5427crz (note) 28-pin tssop (pb-free) - mdp0044 el5327cl-t7 24-pin qfn 7? mdp0046 el5427crz-t7 (note) 28-pin tssop (pb-free) 7? mdp0044 el5327cl-t13 24-pin qfn 13? mdp0046 el5427crz-t13 (note) 28-pin tssop (pb-free) 13? mdp0044 note: intersil pb-free products employ special pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which is compatible with both snpb and pb-free solderi ng 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-020b. el5127, el5227, el5327, el5427
3 pinouts el5127 (10-pin msop) top view el5227 (20-pin tssop) top view el5327 (24-pin tssop) top view el5427 (28-pin tssop) top view el5227, el5327 (24-pin qfn) top view el5427 (32-pin qfn) top view 1 2 3 4 10 9 8 7 5 6 vin1 vin2 vs+ vin3 vin4 vout 1 vout 2 vout 3 vout 4 vs- 1 2 3 4 16 15 14 13 5 6 7 12 11 9 8 10 20 19 18 17 vin1 vin2 vin3 vin4 vs+ vout1 vout2 vout4 vs- vout3 vs+ vin5 vin6 vin7 vin8 vs- vout5 vout7 vout8 vout6 1 2 3 4 16 15 14 13 5 6 7 12 11 9 8 10 20 19 18 17 24 23 22 21 vin1 vin2 vin3 vin4 vin5 vout1 vout2 vout4 vout5 vout3 vs+ vs+ vin6 vin7 vin8 vs- vs- vout7 vout8 vout6 vin9 vin10 vout9 vout1 0 1 2 3 4 28 27 26 25 5 6 7 24 23 22 8 21 9 10 20 19 11 12 13 18 17 16 14 15 vin1 vin2 vin3 vin4 vin5 vout1 vout2 vout4 vout5 vout3 vin6 vs+ vs+ vin7 vin8 vout6 vs- vout7 vout8 vs- vin9 vin10 vin11 vin12 vout9 vout1 1 vout1 2 vout1 0 vin3 vin4 vin5 vs+ vin6 vin7 vin8 vout3 vout4 vout5 vs- vout6 vout7 vout8 vin2 vin1* nc vout1* vout2 vin9 cvin10* nc vout10* vout9 19 18 17 16 15 14 13 24 23 22 21 20 8 9 10 11 12 1 2 3 4 5 6 7 thermal pad * not available in el5227 thermal pad 25 24 23 22 21 20 19 32 31 30 29 28 10 11 12 13 14 1 2 3 4 5 6 7 vin3 vin4 vin5 vin6 vs+ vin7 vin8 vout3 vout4 vout5 vout6 vs- vout7 vout8 vin2 vin1 nc nc nc vin11 vin12 nc nc nc 8 9 18 17 15 27 16 26 vout9 vout10 vout12 vout11 vin9 vin10 vout1 vout2 el5127, el5227, el5327, el5427
4 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 between v s + and v s -. . . . . . . . . . . . . . . . . . . .+18v input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . v s - -0.5v, v s +0.5v maximum continuous output current . . . . . . . . . . . . . . . . . . . 30ma esd voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2kv maximum die temperature . . . . . . . . . . . . . . . . . . . . . . . . . . +125c storage temperature . . . . . . . . . . . . . . . . . . . . . . . . -65c to +150c power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see curves 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, r l = 10k ? , c l = 10pf to 0v, t a = 25c, unless otherwise specified. parameter description conditions min typ max unit input characteristics v os input offset voltage v cm = 0v 1 15 mv tcv os average offset voltage drift (note 1) 5 v/c i b input bias current v cm = 0v 2 50 na r in input impedance 1g ? c in input capacitance 1.35 pf a v voltage gain -4.5v v out 4.5v 0.99 1.01 v/v output characteristics v ol output swing low i l = -5ma -4.95 -4.85 v v oh output swing high i l = +5ma 4.85 4.95 v i out (max) max output current (note 2) r l = 10 ? 100 120 30 ma power supply performance psrr power supply rejection ratio v s is moved from 2.25v to 7.75v 55 80 db i s supply current no load (el5127) 0.7 0.9 ma no load (el5227) 1.2 1.4 ma no load (el5327) 1.4 2 ma no load (el5427) 1.6 2.2 ma dynamic performance sr slew rate (note 3) -4.0v v out 4.0v, 20% to 80% 0.9 2.2 v/s t s settling to +0.1% (a v = +1) (a v = +1), v o = 2v step 900 ns bw -3db bandwidth r l = 10k ? , c l = 10pf 2.5 mhz cs channel separation f = 100khz 75 db notes: 1. measured over operat ing temperature range. 2. instantaneous peak current. 3. slew rate is measured on rising and falling edges. el5127, el5227, el5327, el5427
5 electrical specifications v s + = +5v, v s - = 0v, r l = 10k ? , c l = 10pf to 2.5v, t a = 25c, unless otherwise specified. parameter description condition min typ max unit input characteristics v os input offset voltage v cm = 2.5v 1 15 mv tcv os average offset voltage drift (note 1) 5 v/c i b input bias current v cm = 2.5v 2 50 na r in input impedance 1g ? c in input capacitance 1.35 pf a v voltage gain 0.5v v out 4.5v 0.99 1.01 v/v output characteristics v ol output swing low i l = -5ma 80 150 mv v oh output swing high i l = +5ma 4.85 4.95 v i out (max) output current (note 2) r l = 10 ? 100 120 ma power supply performance psrr power supply rejection ratio v s is moved from 4.5v to 15.5v 55 80 db i s supply current no load (el5127) 0.7 0.9 ma no load (el5227) 1.1 1.35 ma no load (el5327) 1.35 1.9 ma no load (el5427) 1.5 2.05 ma dynamic performance sr slew rate (note 3) 1v v out 4v, 20% to 80% 0.9 1.5 v/s t s settling to +0.1% (a v = +1) (a v = +1), v o = 2v step 1000 ns bw -3db bandwidth r l = 10k ? , c l = 10pf 2.5 mhz cs channel separation f = 5mhz 75 db notes: 1. measured over operat ing temperature range. 2. instantaneous peak current. 3. slew rate is measured on rising and falling edges. el5127, el5227, el5327, el5427
6 electrical specifications v s + = +15v, v s - = 0v, r l = 10k ? , c l = 10pf to 7.5v, t a = 25c, unless otherwise specified. parameter description condition min typ max unit input characteristics v os input offset voltage v cm = 7.5v 1 18 mv tcv os average offset voltage drift (note 1) 5 v/c i b input bias current v cm = 7.5v 2 50 na r in input impedance 1g ? c in input capacitance 1.35 pf av voltage gain 0.5v v out 14.5v 0.99 1.01 v/v output characteristics v ol output swing low i l = -5ma 50 150 mv v oh output swing high i l = +5ma 14.85 14.95 v i out (max) output current (note 2) r l = 10 ? 100 120 ma power supply performance psrr power supply rejection ratio v s is moved from 4.5v to 15.5v 55 80 db i s supply current no load (el5127) 0.75 0.95 ma no load (el5227) 1.3 1.55 ma no load (el5327) 1.5 2.1 ma no load (el5427) 1.6 2.4 ma dynamic performance sr slew rate (note 3) 1v v out 14v, 20% to 80% 0.9 2.2 v/s t s settling to +0.1% (a v = +1) (a v = +1), v o = 2v step 900 ns bw -3db bandwidth r l = 10k ? , c l = 10pf 2.5 mhz cs channel separation f = 5mhz 75 db notes: 1. measured over operat ing temperature range. 2. instantaneous peak current. 3. slew rate is measured on rising and falling edges. el5127, el5227, el5327, el5427
7 typical perfor mance curves figure 1. freqeuncy response for various r l figure 2. frequency response for various c l figure 3. output impedance vs frequency figure 4. maximum output swing vs frequency figure 5. input voltage noise spectral density vs frequency figure 6. total harmonic distortion + noise vs frequency 20 10 0 -10 -20 -30 1k 10k 100k 1m 10m frequency (hz) normalized magnitude (db) 1k ? 10k ? 562 ? 150 ? c l =10pf v s =5v 20 10 0 -10 -20 -30 1k 10k 100k 1m 10m frequency (hz) normalized magnitude (db) 47pf 12pf 1nf 100pf r l =10k ? v s =5v 2000 1600 1200 800 400 0 1k 10k 100k 1m frequency (hz) output impedance ( ? ) t a =25c v s =5v 12 10 8 6 4 0 10k 100k 1m 10m frequency (hz) maximum output swing (v p-p ) 2 v s =5v r l =10k ? c l =12pf t a =25c 300 100 10 1k 10k 100k 10m 100m frequency (hz) voltage noise (nv/ hz) 1m 0.12 0.1 0.08 0.06 0.04 0.02 0 1k 10k 100k frequency (hz) thd + noise (%) el5127, el5227, el5327, el5427
8 figure 7. small signal overshoot vs load capacitance figure 8. input offset voltage distribution figure 9. input bias current vs temperature figure 10. output high voltage vs temperature figure 11. output low voltage vs temperature figure 12. voltage gain vs temperature typical perfor mance curves 100 30 20 0 10 100 1k capacitance (pf) overshoot (%) 90 70 50 80 60 40 v s =5v r l =10k ? v in =50mv t a =25c 18 16 14 12 10 8 6 4 2 0 -10 -8 -6 -4 -2 0 2 4 6 8 10 input offset voltage (mv) % of buffers 3.5 3 2.5 2 1.5 1 85 temperature (c) input bias current (na) -35-15 5 254565 v s =5v 4.955 4.95 4.945 4.94 4.935 4.925 85 temperature (c) output high voltage (v) -35-15 5 254565 4.93 v s =5v i out =5ma -4.938 -4.958 85 temperature (c) output low voltage (v) -35 -15 5 25 45 65 -4.942 -4.946 -4.95 -4.954 v s =5v i out =-5ma 1.0045 1.004 1.003 1.0025 1.002 1.001 85 temperature (c) voltage gain (v/v) -35 -15 5 25 45 65 1.0015 1.0035 v s =5v el5127, el5227, el5327, el5427
9 figure 13. slew rate vs temperature figure 14. supply current per channel vs temperature figure 15. supply current per channel vs supply voltage figure 16. large signal transient response figure 17. small signal transient response figure 18. package power dissipation vs ambient temperature typical perfor mance curves 2.255 2.245 2.235 2.225 2.215 80 temperature (c) slew rate (v/s) -40 40 0 -20 60 20 v s =5v 0.185 0.18 0.175 0.17 0.16 85 temperature (c) supply current (ma) -35-15 5 254565 0.165 v s =5v 0.195 0.19 0.185 0.175 0.165 18 supply voltage (v) supply current (ma) 468 121416 0.17 0.18 10 t a =25c 4s/div 1v/div 1s/div 20mv/div 3 2.5 2 1.5 1 0.5 0 0 255075100125150 85 ambient temperature (c) power dissipation (w) 2.703w 2.857w qfn32 ja =35c/w qfn24 ja =37c/w jedec jesd51-7 high effective thermal conductivity test board 870mw msop10 ja =115c/w el5127, el5227, el5327, el5427
10 applications information product description the el5127, el5227, el5327, and el5427 unity gain buffers are fabricated using a high voltage cmos process. it exhibits rail-to-rail input and output capability and has low power consumption (120a per buffer). these features make the el5127, el5227, el5327, and el5427 ideal for a wide range of general-purpose applications. when driving a load of 10k ? and 12pf, the el5127, el5227, el5327, and el5427 have a -3db bandwidth of 2.5mhz and exhibits 2.2v/s slew rate. operating voltage, input, and output the el5127, el5227, el5327, and el5427 are specified with a single nominal supply voltage from 5v to 15v or a split supply with its total range from 5v to 15v. correct operation is guaranteed for a supply range of 4.5v to 16.5v. most el5127, el5227, el5327, and el5427 specifications are stable over both the full supply range and operating temperatures of -40c to +85c. parameter variations with operating voltage and/or temperature are shown in the typical performance curves. the output swings of the el5127, el5227, el5327, and el5427 typically extend to within 80mv of positive and negative supply rails with load currents of 5ma. decreasing load currents will extend the output voltage range even closer to the supply rails. figure 22 shows the input and output waveforms for the device. operation is from 5v supply with a 10k ? load connected to gnd. the input is a 10v p-p sinusoid. the output voltage is approximately 9.985v p-p . figure 19. package power dissipation vs ambient temperature figure 20. package power dissipation vs ambient temperature figure 21. package power dissipation vs ambient temperature typical perfor mance curves jedec jesd51-7 high effective thermal conductivity test board 1.4 0 ambient temperature (c) power dissipation (w) 1.2 1 0.8 0.6 0.4 0.2 0 25 50 75 100 125 85 1.111w 1.333w 1.176w tssop28 ja =75c/w tssop24 ja =85c/w tssop20 ja =90c/w 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 25 50 75 125 150 ambient temperature (c) power dissipation (w) 100 85 714mw 758mw jedec jesd51-3 low effective thermal conductivity test board qfn32 ja =132c/w 486mw msop10 ja =206c/w qfn24 ja =140c/w jedec jesd51-3 low effective thermal conductivity test board 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 25 50 75 100 125 ambient temperature (c) power dissipation (w) 85 714mw 833mw 781mw tssop28 ja =120c/w tssop24 ja =128c/w tssop20 ja =140c/w el5127, el5227, el5327, el5427
11 figure 22. operation with rail-to-rail input and output short circuit current limit the el5127, el5227, el5327, and el5427 will limit the short circuit current to 120ma if the output is directly shorted to the positive or the negative supply. if an output is shorted indefinitely, the power dissipation could easily increase such that the device may be damaged. maximum reliability is maintained if the output continuous current never exceeds 30ma. this limit is set by the design of the internal metal interconnects. output phase reversal the el5127, el5227, el5327, and el5427 are immune to phase reversal as long as the input voltage is limited from v s - -0.5v to v s + +0.5v. figure 23 shows a photo of the output of the device with the input voltage driven beyond the supply rails. although the device's output will not change phase, the input's overvoltage should be avoided. if an input voltage exceeds supply voltage by more than 0.6v, electrostatic protection diodes placed in the input stage of the device begin to conduct and overvoltage damage could occur. figure 23. operation with beyond-the-rails input power dissipation with the high-output drive capability of the el5127, el5227, el5327, and el5427 buffer, 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 load conditions need to be modified for the buffer 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 p dmax = maximum power dissipation in 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 loads, or: when sourcing, and : when sinking. where: i = 1 to total number of buffers v s = total supply voltage i smax = maximum quiescent current per channel v out i = maximum output voltage of the application i load i = load current if we set the two p dmax equations equal to each other, we can solve for r load i to avoid device overheat. the package power dissipation curves provide a convenient way to see if the device will overheat. the maximum safe power dissipation can be found graphically, based on the package type and the ambient temperature. by using the previous equation, it is a simple matter to see if p dmax exceeds the device's power derating curves. unused buffers it is recommended that any unused buffer have the input tied to the ground plane. output input 5v v s =5v t a =25c v in =10v p-p 5v 10s 1v v s =2.5v t a =25c v in =6v p-p 1v 10s p dmax t jmax - t amax ja -------------------------------------------- - = p dmax iv [ s i smax v s + ( - v out i ) i load i ] + = p dmax iv [ s i smax v ( out i - v s - ) i load i + ] = el5127, el5227, el5327, el5427
12 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 driving capacitive loads the el5127, el5227, el5327, and el5427 can drive a wide range of capacitive loads. as load capacitance increases, however, the -3db bandwidth of the device will decrease and the peaking increase. the buffers drive 10pf loads in parallel with 10k ? with just 1.5db of peaking, and 100pf with 6.4db of peaking. if less peaking is desired in these applications, a small series resistor (usually between 5 ? and 50 ? ) can be placed in series with the output. however, this will obviously reduce the gain slightly. another method of reducing peaking is to add a ?snubber? circuit at the output. a snubber is a shunt load consisting of a resistor in series with a capacitor. values of 150 ? and 10nf are typical. the advantage of a snubber is that it does not draw any dc load current or reduce the gain. power supply bypassing and printed circuit board layout as with any high frequency device, good printed circuit board layout is necessary for optimum performance. ground plane construction is highly recommended, lead lengths should be as short as possible, and the power supply pins must be well bypassed to reduce the risk of oscillation. for normal single supply operation, where the v s - pin is connected to ground, a 0.1f ceramic capacitor should be placed from v s + pin to v s - pin. a 4.7f tantalum capacitor should then be connected from v s + pin to ground. one 4.7f capacitor may be used for multiple devices. this same capacitor combination should be placed at each supply pin to ground if split supplies are to be used. el5127, el5227, el5327, el5427

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