1 ? fn6104.0 isl59110 8mhz rail-to-rail co mposite video driver the isl59110 is a single rail-to-rail 3-pole output reconstruction filter with a - 3db roll-off frequency of 8mhz and a slew rate of 40v/s, with input signal dc restoration accomplished with an internal sync tip clamp. operating from single supplies ranging from +2.5v to +3.6v and sinking an ultra-low 2ma quiescent current, the isl59110 is ideally suited for low power, battery-operated applications. it also features inputs capable of reaching down to 0.15v below the negative rail. additionally, an enable high pin shuts the part down in under 14ns. the isl59110 is designed to meet the needs for micropower and bandwidth required in battery-operated communication, instrumentation, and modern indu strial applications such as video on demand, cable set-top boxes, dvd players, and hdtv. the isl59110 is offered in a space-saving sc-70 package guaranteed to a 1mm maximum height constraint and specified for operation from -40c to +85c temperature range. features ? 3rd order 8mhz reconstruction filter ? 40v/s slew rate ? low supply current = 2ma ? power-down current less than 3a ? supplies from 2.5v to 3.6v ? rail-to-rail output ? input to 0.15v below v s - ? input sync tip clamp ? sag correction reduces ac coupling capacitor size ? pb-free plus anneal available (rohs compliant) applications ? video amplifiers ? portable and handheld products ? communications devices ? video on demand ? cable set-top boxes ? satellite set-top boxes ? dvd players ? hdtv ? personal video recorders pinout isl59110 (6-pin sc-70)* top view ordering information part number package tape & r e e l p k g. d w g. # isl59110ie-t7 6-pin sc-70 7? (3k pcs) p6.049 isl59110ie-t7a 6-pin sc-70 7? (250 pcs) p6.049 isl59110iez-t7 (see note) 6-pin sc-70 (pb-free) 7? (250 pcs) p6.049 ISL59110IEZ-T7A (see note) 6-pin sc-70 (pb-free) 7? (3k pcs) p6.049 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 classi fied at pb-free peak reflow temperatures that meet or exceed the pb-free requirements of ipc/jedec j std-020. 1 2 3 6 4 in+ gnd sag vs+ out 5en - + lpf *1mm maximum height guaranteed data sheet june 24, 2005 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. 2005. all rights reserved. all other trademarks mentioned are the property of their respective owners.
2 fn6104.0 june 24, 2005 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 m aximum ratings (t a = 25c) supply voltage from v s + to gnd . . . . . . . . . . . . . . . . . . . . . . . 3.6v input voltage . . . . . . . . . . . . . . . . . . . . . . . v s + +0.3v to gnd -0.3v continuous output current . . . . . . . . . . . . . . . . . . . . . . . . . . . 40ma power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see curves storage temperature . . . . . . . . . . . . . . . . . . . . . . . .-65c to +125c ambient operating temperature . . . . . . . . . . . . . . . .-40c to +85c operating junction temperature . . . . . . . . . . . . . . . . . . . . . . +125c 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 + = 3.3v, t a = 25c, r l = 150 ? to gnd, c l = 0.1f, unless otherwise specified. description parameter conditions min typ max unit input characteristics v cc supply voltage range 2.5 3.6 v i dd-on quiescent supply current v in = 500mv, en = v dd , no load 2 2.75 ma i dd-off shutdown supply current en = 0v 3 a v ols output level shift voltage v in = 0v, no load 60 130 200 mv v clamp input voltage clamp i in = -1ma -40 -15 +10 mv i clamp_chg clamp charge current v in = v clamp - 100mv -6 -3 ma i clamp_dchg clamp discharge current v in = 500mv 2.5 5 7.5 a r in input resistance 0.5v < v in < 1.0v 0.5 3 m ? a v voltage gain r l = 150 ? 1.95 2.0 2.04 v/v a sag sag correction dc gain to v out sag open 2.25 v/v psrr dc power supply rejection v dd = 2.7v to 3.3v 43 63 db v oh output voltage high swing v in = 2v, r l = 150 ? to gnd 2.85 3.2 v i sc output short-circuit current v in = 2v, to gnd through 10 ? -94 -65 ma v in = 100mv, out short to v dd through 10 ? 65 115 ma i enable enable current 3.3v, enable pin = 0v -3 0 +3 a v il disable threshold v dd = 2.7v to 3.3v 0.8 v v ih enable threshold v dd = 2.7v to 3.3v 1.6 v r out shutdown output impedance en = 0v dc 3.6 4.5 5.9 k ? en = 0v, f = 4.5mhz 3.4 k ? ac performance bw 0.1db bandwidth r l = 150 ? , c l = 5pf 4 mhz bw -3db bandwidth r l = 150 ? , c l = 5pf 8 mhz normalized stopband gain f = 27mhz -24.2 db dg differential gain ntsc & pal dc coupled 0.10 % ntsc & pal ac coupled 0.84 % dp differential phase ntsc & pal dc coupled 0.05 ntsc & pal ac coupled 0.62 d/dt group delay variation f = 100khz, 5mhz 5.4 ns snr signal to noise ratio 100% white signal 65 db t on enable time v in = 500mv, v out to 1% 200 ns isl59110
3 fn6104.0 june 24, 2005 t off disable time v in = 500mv, v out to 1% 14 ns +sr positive slew rate 10% to 90%, v in = 1v step 20 41 70 v/s -sr negative slew rate 90% to 10%, v in = 1v step -20 -30 -70 v/s t f fall time 2.5v step , 80% - 20% 25 ns t r rise time 2.5v step , 20% - 80% 22 ns electrical specifications v s + = 3.3v, t a = 25c, r l = 150 ? to gnd, c l = 0.1f, unless otherwise specified. (continued) description parameter conditions min typ max unit typical performance curves figure 1. gain vs frequency -0.1db figure 2. gain vs frequency -3db point figure 3. gain vs frequency -3db figure 4. gain vs frequency for various r load 100k frequency (hz) normalized gain (db) 10m 1m 0.5 0.3 0.1 -0.1 -0.3 -0.5 -0.1db bw @ 4mhz v dd =+3.3v r l =150 ? c l =5pf isl59110
4 fn6104.0 june 24, 2005 figure 5. gain vs frequency for various c load figure 6. maximum output magnitude vs input magnitude figure 7. phase vs frequency figure 8. psrr vs frequency figure 9. output impedance vs frequency figure 10. isolation vs frequency typical performance curves output impedance ( ? ) 100 1 0.01 10k frequency (hz) 100m 1m 100k 10m 10 0.1 v dd =+3.3v isl59110
5 fn6104.0 june 24, 2005 figure 11. maximum output vs load resistance figure 12. supply current vs supply voltage figure 13. large signal step respons e figure 14. small signal step response figure 15. enable time figure 16. disable time typical performance curves isl59110
6 fn6104.0 june 24, 2005 figure 17. harmonic distortion vs frequency fig ure 18. harmonic distortion vs output voltage figure 19. group delay versus frequency figure 20. -3db bandwidth versus input resistance figure 21. slew rate vs supply voltage typical performance curves isl59110
7 fn6104.0 june 24, 2005 application information the isl59110 is a single supply rail-to-rail output amplifier achieving a -3db bandwidth of around 8mhz and slew rate of about 40v/s while demanding only 2ma of supply current. this part is ideally suited for applications with specific micropower consumption and high bandwidth demands. as the performance characteristics above and the features described below, t he isl59110 is designed to be very attractive for portable composite video applications. the isl59110 features a sync clamp, low pass function, and sag network at the output faci litating reduction of typically large ac coupling capacitors. see figure 24. figure 24. block diagram figure 22. package power dissipation vs ambient temperature figure 23. package power dissipation vs ambient temperature typical performance curves jedec jesd51-3 low effective thermal conductivity test board 450mw j a = 2 2 0 c / w s c 7 0 - 6 power dissipation (w) 0.5 0.4 0.3 0.2 0.1 0 0 ambient temperature (c) 150 75 25 100 50 125 85 0.45 0.35 0.25 0.15 0.05 jedec jesd51-7 high effective thermal conductivity test board 500mw j a = 2 0 0 c / w s c 7 0 - 6 power dissipation (w) 0.55 0.5 0.3 0.2 0.1 0 0 ambient temperature (c) 150 75 25 100 50 125 85 0.4 0.45 0.25 0.15 0.05 0.35 - + + ? - + in r in c in v dd in en gnd v dd v dd en=gnd: shutdown i dd ~0 en=v dd : active i dd ~1.5ma r 1 r 2 r 3 c 1 c 3 v dc c 2 r 6 r 5 r 4 r 7 out sag c 5 c 4 r out r l sync clamp sallen key low pass filter sag network ac coupling capacitor 100nf 47nf 22nf 75 ? 75 ? isl59110
8 fn6104.0 june 24, 2005 internal sync clamp the typical embedded video dac operates from a ground referenced single supply. this becomes an issue because the lower level of the sync pulse output may be at a 0v reference level to some positive level. the problem is presenting a 0v input to most single supply driven amplifiers will saturate the output stage of the amplifier resulting in a clipped sync tip and degrading the video image. a larger positive reference may offset the input above its positive range. the isl59110 features an internal sync clamp and offset function to level shift the entire video signal to the best level before it reaches t he input of the amplifier stage. these features are also helpful to avoid saturation of the output stage of the amplifier by settin g the signal closer to the best voltage range. the simplified block diagram of the isl59110 in figure 24 is divided into four sections. the first, section a is the sync clamp. the ac coupled video sync signal is pulled negative by a current source at the input of the comparator amplifier. when the sync tip goes below the comparator threshold the output comparator is driven negative, the pmos device turns on clamping sync tip to near ground level. the network triggers on the sync tip of video signal. the sallen key low pass filter the sallen key in a classic low pass configuration illustrated in figure 24. this provides a very stable low pass function, and in the case of the isl59110, a three-pole roll-off at around 8mhz. the three-pole function is accomplished with an rc low pass network placed in series with and before the sallen key. one pole provided by the rc network and poles two and three provided by the sallen key for a nice three- pole roll-off at around 8mhz. if more aggressive, multiple- pole roll-offs are needed, multip le isl59110 can be placed in series. there will, of course, be a loss of bandwidth as additional devices are added. ac output coupling and the sag network composite video signals carry viable information at frequencies as low as 30hz up to 5mhz. when a video system output is ac coupled it is critical that the filter represented by the output coupling capacitor and the surrounding resistance network provide a band pass function with a low pass band low enough to exclude very low frequencies down to dc, and with a high pass band pass sufficiently high to include frequencies at the higher end of the video spectrum. figure 25. sag network and ac coupling capacitors typically this is accomplished with 220f coupling capacitor, a large and somewhat costly solution providing a low frequency pole around 5hz. if the size of this capacitor is even slightly reduced we have found that the accompanying phase shift in the 50hz to 100hz frequency range results in field tilt resulting in a degraded video image. the internal sag network of the isl59110 replaces the 220f ac coupling capacitor with a network of two smaller capacitors as shown in figure 25. additionally, the network is designed to place a zero in the ~30hz range, providing a small amount of peaking to compensate the phase response associated with field tilt. dc output coupling the isl59110 internal sync cl amp makes it possible to dc couple the output to a video lo ad, eliminating the need for any ac coupling capacitors, saving board space and additional expense for capacitors making the isl59110 is designed to be extremely attractive for portable video applications additionally, this solution completely eliminates the issue of field tilt in the lower frequency. the trade off is greater demand of supply current. typical load current for ac coupled is around 3ma compared to typical 6ma used when dc coupling. figure 26. dc couple r 6 r 5 r 4 r 7 c 5 c 4 r out r l sag network ac coupling capacitor - + television or vcr r out enable isl59110
9 fn6104.0 june 24, 2005 output drive capability the isl59110 does not have internal short circuit protection circuitry. if the output is shorted indefinitely, the power dissipation could easily overheat the die or the current could eventually compromise metal integrity. maximum reliability is maintained if the output current never exceeds 40ma. this limit is set by the design of the internal metal interconnect. note that in transient applic ations, the part is robust. short circuit protection can be provided externally with a back match resistor in series with the output placed close as possible to the output pin. in video applications this would be a 75 ? resistor and will provide adequate short circuit protection to the device. care should still be taken not to stress the device with a short at the output. power dissipation with the high output drive capab ility of the isl59110, 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 an application to determine if load conditions or package types need to be modified to assure operation of the amplifier in a safe operating area. the maximum power dissipation allowed in a package is determined according to: where: t jmax = maximum junction temperature t amax = maximum ambi ent 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: for sourcing: for sinking: where: v s = supply voltage i smax = maximum quiescent supply current v out = maximum output voltage of the application r load = load resistance tied to ground i load = load current by setting the two p dmax equations equal to each other, we can solve the output current and r load to avoid the device overheat. power supply bypassing printed circuit board layout as with any modern operational amplifier, a good printed circuit board layout is necessary for optimum performance. lead lengths should be as short as possible. the power supply pin must be well bypassed to reduce the risk of oscillation. for normal single supply operation, a single 4.7f tantalum capacitor in parallel with a 0.1f ceramic capacitor from v s + to gnd will suffice. printed circuit board layout 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. pd max t jmax t amax ? ja -------------------------------------------- - = pd max v s i smax v s v out ? () + v out r l --------------- - = pd max v s i smax v out v s ? () + i load = isl59110
10 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 fn6104.0 june 24, 2005 isl59110 small outline transistor plastic packages (sc70-6) d e1 e c l e b c l a2 a a1 c l 0.20 (0.008) m 0.10 (0.004) c c -c- seating plane 12 3 4 5 6 e1 c l c view c view c l r1 r 4x 1 4x 1 gauge plane l1 seating l2 c plane c base metal with c1 b1 plating b p6.049 6 lead small outline transistor plastic package symbol inches millimeters notes min max min max a 0.031 0.043 0.80 1.00 - a1 0.000 0.004 0.00 0.10 - a2 0.031 0.039 0.00 1.00 - b 0.006 0.012 0.15 0.30 - b1 0.006 0.010 0.15 0.25 c 0.003 0.009 0.08 0.22 6 c1 0.003 0.009 0.08 0.20 6 d 0.073 0.085 1.85 2.15 3 e 0.071 0.094 1.80 2.40 - e1 0.045 0.053 1.15 1.35 3 e 0.0256 ref 0.65 ref - e1 0.0512 ref 1.30 ref - l 0.010 0.018 0.26 0.46 4 l1 0.017 ref. 0.420 ref. l2 0.006 bsc 0.15 bsc n6 65 r 0.004 - 0.10 - r1 0.004 0.010 0.15 0.25 0 o 8 o 0 o 8 o - rev. 2 9/03 notes: 1. dimensioning and tolerance per asme y14.5m-1994. 2. package conforms to eiaj sc70 and jedec mo203ab. 3. dimensions d and e1 are exclusiv e of mold flash, protrusions, or gate burrs. 4. footlength l measured at reference to gauge plane. 5. ?n? is the number of terminal positions. 6. these dimensions apply to the flat section of the lead between 0.08mm and 0.15mm from the lead tip. 7. controlling dimension: millime ter. converted inch dimen- sions are for reference only
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