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1 lt1364/LT1365 n 70mhz gain bandwidth n 1000v/ m s slew rate n 7.5ma maximum supply current per amplifier n unity-gain stable n c-load tm op amp drives all capacitive loads n 9nv/ ? hz input noise voltage n 1.5mv maximum input offset voltage n 2 m a maximum input bias current n 350na maximum input offset current n 50ma minimum output current n 7.5v minimum output swing into 150 w n 4.5v/mv minimum dc gain, r l =1k n 50ns settling time to 0.1%, 10v step n 0.06% differential gain, a v =2, r l =150 w n 0.04 differential phase, a v =2, r l =150 w n specified at 2.5v, 5v, and 15v dual and quad 70mhz, 1000v/ m s op amps the lt1364/LT1365 are dual and quad high speed opera- tional amplifiers with outstanding ac and dc perfor- mance. the amplifiers feature much lower supply current and higher slew rate than devices with comparable band- width. the circuit topology is a voltage feedback amplifier with matched high impedance inputs and the slewing performance of a current feedback amplifier. the high slew rate and single stage design provide excellent settling characteristics which make the circuit an ideal choice for data acquisition systems. each output drives a 150 w load to 7.5v with 15v supplies and to 3.4v on 5v sup- plies. the amplifiers are stable with any capacitive load making them useful in buffer or cable driving applications. the lt1364/LT1365 are members of a family of fast, high performance amplifiers using this unique topology and employing linear technology corporations advanced bipolar complementary processing. for a single amplifier version of the lt1364/LT1365 see the lt1363 data sheet. for 50mhz devices with 4ma supply currents see the lt1360 through lt1362 data sheets. for lower supply current amplifiers see the lt1354 to lt1359 data sheets. singles, duals, and quads of each amplifier are available. n wideband amplifiers n buffers n active filters n video and rf amplification n cable drivers n data acquisition systems frequency (mhz) 1 ? ? ? ? 0 gain (db) 2 100 1364/1365 ta01 10 v s = 10v v s = 5v v s = 2.5v v s = 15v + 1/2 lt1364 510 w 75 w out 75 w in 510 w cable driver frequency response 1364/1365 ta02 a v = C1 large-signal response c-load is a trademark of linear technology corporation , ltc and lt are registered trademarks of linear technology corporation. applicatio s u features typical applicatio u descriptio u
2 lt1364/LT1365 total supply voltage (v + to v C ) ............................... 36v differential input voltage (transient only, note 2) .................................... 10v input voltage ............................................................ v s output short-circuit duration (note 3) ............ indefinite absolute m axi m u m ratings w ww u operating temperature range (note 8) ...C40 c to 85 c specified temperature range (note 9) ....C40 c to 85 c maximum junction temperature (see below) plastic package ................................................ 150 c storage temperature range ..................C65 c to 150 c lead temperature (soldering, 10 sec).................. 300 c order part number order part number t jmax = 150 c, q ja = 190 c/ w t jmax = 150 c, q ja = 130 c/ w lt1364cs8 s8 part marking 1364 lt1364cn8 order part number order part number LT1365cs LT1365cn v + d 14 13 12 11 10 9 8 7 6 5 4 3 2 1 out a ?n a +in a +in b ?n b out b out c v ?n d out d top view a +in d +in c ?n c c b n package 14-lead pdip v + d 16 15 14 13 12 11 10 7 6 5 4 3 2 1 out a ?n a +in a +in b ?n b out b out c 9 8 nc nc v ?n d out d top view a +in d +in c ?n c c b s package 16-lead plastic so 8 7 6 5 4 3 2 1 in a +in a v + top view s8 package 8-lead plastic so out a out b v in b +in b a b 8 7 6 5 4 3 2 1 in a +in a v + top view n8 package 8-lead pdip out a out b v in b +in b a b t jmax = 150 c, q ja = 150 c/ w t jmax = 150 c, q ja = 110 c/ w consult factory for industrial and military grade parts. package/order i n for m atio n w u u symbol parameter conditions v supply min typ max units v os input offset voltage (note 4) 15v 0.5 1.5 mv 5v 0.5 1.5 mv 2.5v 0.7 1.8 mv i os input offset current 2.5v to 15v 120 350 na i b input bias current 2.5v to 15v 0.6 2.0 m a e n input noise voltage f = 10khz 2.5v to 15v 9 nv/ ? hz i n input noise current f = 10khz 2.5v to 15v 1 pa/ ? hz r in input resistance v cm = 12v 15v 12 50 m w input resistance differential 15v 5 m w c in input capacitance 15v 3 pf t a = 25 c, v cm = 0v unless otherwise noted. electrical characteristics (note 1)
3 lt1364/LT1365 input voltage range + 15v 12.0 13.4 v 5v 2.5 3.4 v 2.5v 0.5 1.1 v input voltage range C 15v C13.2 C12.0 v 5v C3.2 C2.5 v 2.5v C0.9 C0.5 v cmrr common mode rejection ratio v cm = 12v 15v 84 90 db v cm = 2.5v 5v 76 81 db v cm = 0.5v 2.5v 66 71 db psrr power supply rejection ratio v s = 2.5v to 15v 90 100 db a vol large-signal voltage gain v out = 12v, r l = 1k 15v 4.5 9.0 v/mv v out = 10v, r l = 500 w 15v 3.0 6.5 v/mv v out = 7.5v, r l = 150 w 15v 2.0 3.8 v/mv v out = 2.5v, r l = 500 w 5v 3.0 6.4 v/mv v out = 2.5v, r l = 150 w 5v 2.0 5.6 v/mv v out = 1v, r l = 500 w 2.5v 2.5 5.2 v/mv v out output swing r l = 1k, v in = 40mv 15v 13.5 14.0 v r l = 500 w , v in = 40mv 15v 13.0 13.7 v r l = 500 w , v in = 40mv 5v 3.5 4.1 v r l = 150 w , v in = 40mv 5v 3.4 3.8 v r l = 500 w , v in = 40mv 2.5v 1.3 1.7 v i out output current v out = 7.5v 15v 50 60 ma v out = 3.4v 5v 23 29 ma i sc short-circuit current v out = 0v, v in = 3v 15v 70 105 ma sr slew rate a v = C 2, (note 5) 15v 750 1000 v/ m s 5v 300 450 v/ m s full power bandwidth 10v peak, (note 6) 15v 15.9 mhz 3v peak, (note 6) 5v 23.9 mhz gbw gain bandwidth f = 200khz 15v 50 70 mhz 5v 35 50 mhz 2.5v 40 mhz t r , t f rise time, fall time a v = 1, 10%-90%, 0.1v 15v 2.6 ns 5v 3.6 ns overshoot a v = 1, 0.1v 15v 36 % 5v 23 % propagation delay 50% v in to 50% v out , 0.1v 15v 4.6 ns 5v 5.6 ns t s settling time 10v step, 0.1%, a v = C1 15v 50 ns 10v step, 0.01%, a v = C1 15v 80 ns 5v step, 0.1%, a v = C1 5v 55 ns differential gain f = 3.58mhz, a v = 2, r l = 150 w 15v 0.03 % 5v 0.06 % f = 3.58mhz, a v = 2, r l = 1k 15v 0.01 % 5v 0.01 % differential phase f = 3.58mhz, a v = 2, r l = 150 w 15v 0.10 deg 5v 0.04 deg f = 3.58mhz, a v = 2, r l = 1k 15v 0.05 deg 5v 0.25 deg r o output resistance a v = 1, f = 1mhz 15v 0.7 w channel separation v out = 10v, r l = 500 w 15v 100 113 db i s supply current each amplifier 15v 6.3 7.5 ma each amplifier 5v 6.0 7.2 ma symbol parameter conditions v supply min typ max units t a = 25 c, v cm = 0v unless otherwise noted. electrical characteristics
4 lt1364/LT1365 symbol parameter conditions v supply min typ max units v os input offset voltage (note 4) 15v l 2.0 mv 5v l 2.0 mv 2.5v l 2.2 mv input v os drift (note 7) 2.5v to 15v l 10 13 m v/ c i os input offset current 2.5v to 15v l 500 na i b input bias current 2.5v to 15v l 3 m a cmrr common mode rejection ratio v cm = 12v 15v l 82 db v cm = 2.5v 5v l 74 db v cm = 0.5v 2.5v l 64 db psrr power supply rejection ratio v s = 2.5v to 15v l 88 db a vol large-signal voltage gain v out = 12v, r l = 1k 15v l 3.6 v/mv v out = 10v, r l = 500 w 15v l 2.4 v/mv v out = 2.5v, r l = 500 w 5v l 2.4 v/mv v out = 2.5v, r l = 150 w 5v l 1.5 v/mv v out = 1v, r l = 500 w 2.5v l 2.0 v/mv v out output swing r l = 1k, v in = 40mv 15v l 13.4 v r l = 500 w , v in = 40mv 15v l 12.8 v r l = 500 w , v in = 40mv 5v l 3.4 v r l = 150 w , v in = 40mv 5v l 3.3 v r l = 500 w , v in = 40mv 2.5v l 1.2 v i out output current v out = 12.8v 15v l 25 ma v out = 3.3v 5v l 22 ma i sc short-circuit current v out = 0v, v in = 3v 15v l 55 ma sr slew rate a v = C 2, (note 5) 15v l 600 v/ m s 5v l 225 v/ m s gbw gain bandwidth f = 200khz 15v l 44 mhz 5v l 31 mhz channel separation v out = 10v, r l = 500 w 15v l 98 db i s supply current each amplifier 15v l 8.7 ma each amplifier 5v l 8.4 ma electrical characteristics symbol parameter conditions v supply min typ max units v os input offset voltage (note 4) 15v l 2.5 mv 5v l 2.5 mv 2.5v l 2.7 mv input v os drift (note 7) 2.5v to 15v l 10 13 m v/ c i os input offset current 2.5v to 15v l 600 na i b input bias current 2.5v to 15v l 3.6 m a cmrr common mode rejection ratio v cm = 12v 15v l 82 db v cm = 2.5v 5v l 74 db v cm = 0.5v 2.5v l 64 db psrr power supply rejection ratio v s = 2.5v to 15v l 87 db a vol large-signal voltage gain v out = 12v, r l = 1k 15v l 2.5 v/mv v out = 10v, r l = 500 w 15v l 1.5 v/mv v out = 2.5v, r l = 500 w 5v l 1.5 v/mv v out = 2.5v, r l = 150 w 5v l 1.0 v/mv v out = 1v, r l = 500 w 2.5v l 1.3 v/mv the l denotes the specifications which apply over the temperature range 0 c t a 70 c, v cm = 0v unless otherwise noted. the l denotes the specifications which apply over the temperature range C 40 c t a 85 c, v cm = 0v unless otherwise noted. (note 9)
5 lt1364/LT1365 symbol parameter conditions v supply min typ max units electrical characteristics typical perfor m a n ce characteristics u w input common mode range vs supply voltage supply voltage ( v) 0 supply current (ma) 4 2 10 8 6 10 5 01520 1364/1365 g01 ?5 c 25 c 125 c supply current vs supply voltage and temperature input bias current vs input common mode voltage input common mode voltage (v) 0.2 input bias current ( m a) 0.4 1.0 0.8 0.6 ?5 ?0 0 10 15 5 ? 1364/1365 g03 v s = 15v t a = 25 c i b = ? ? i b + + i b 2 note 1: absolute maximum ratings are those values beyond which the life of a device may be impaired. note 2: differential inputs of 10v are appropriate for transient operation only, such as during slewing. large, sustained differential inputs will cause excessive power dissipation and may damage the part. see input considerations in the applications information section of this data sheet for more details. note 3: a heat sink may be required to keep the junction temperature below absolute maximum when the output is shorted indefinitely. note 4: input offset voltage is pulse tested and is exclusive of warm-up drift. note 5: slew rate is measured between 10v on the output with 6v input for 15v supplies and 1v on the output with 1.75v input for 5v supplies. note 6: full power bandwidth is calculated from the slew rate measurement: fpbw = sr/2 p v p . note 7: this parameter is not 100% tested. note 8: the lt1364c/LT1365c are guaranteed functional over the operating temperature range of C40 c to 85 c. note 9: the lt1364c/LT1365c are guaranteed to meet specified performance from 0 c to 70 c. the lt1364c/LT1365c are designed, characterized and expected to meet specified performance from C 40 c to 85 c, but are not tested or qa sampled at these temperatures. for guaranteed i-grade parts, consult the factory. supply voltage ( v) v common mode range (v) 2.0 0.5 1.0 1.5 v + 1.0 0.5 2.0 1.5 10 5 01520 1364/1365 g02 t a = 25 c d v os < 1mv the l denotes the specifications which apply over the temperature range C40 c t a 85 c, v cm = 0v unless otherwise noted. (note 9) v out output swing r l = 1k, v in = 40mv 15v l 13.4 v r l = 500 w , v in = 40mv 15v l 12.7 v r l = 500 w , v in = 40mv 5v l 3.4 v r l = 150 w , v in = 40mv 5v l 3.2 v r l = 500 w , v in = 40mv 2.5v l 1.2 v i out output current v out = 12.7v 15v l 25 ma v out = 3.2v 5v l 21 ma i sc short-circuit current v out = 0v, v in = 3v 15v l 50 ma sr slew rate a v = C 2, (note 5) 15v l 550 v/ m s 5v l 180 v/ m s gbw gain bandwidth f = 200khz 15v l 43 mhz 5v l 30 mhz channel separation v out = 10v, r l = 500 w 15v l 98 db i s supply current each amplifier 15v l 9.0 ma each amplifier 5v l 8.7 ma
6 lt1364/LT1365 typical perfor m a n ce characteristics u w settling time vs output step (noninverting) settling time vs output step (inverting) frequency (hz) 10 1 input voltage noise (nv/ ? hz) 10 i n 100 0.1 input current noise (pa/ ? hz) 1 10 e n 1k 100 100k 10k 1364/1365 g05 v s = 15v t a = 25 c a v = 101 r s = 100k open-loop gain vs resistive load temperature ( c) 0 input bias current ( m a) 0.4 0.2 1.4 1.2 1.0 0.6 0.8 50 ?5 25 100 125 50 75 0 1364/1365 g04 v s = 15v i b = ? ? i b + + i b 2 input bias current vs temperature input noise spectral density open-loop gain vs temperature temperature ( c) 74 open-loop gain (db) 76 75 81 80 78 77 79 50 ?5 25 100 125 50 75 0 1364/1365 g07 v s = ?5v v o = ?2v r l = 1k output voltage swing vs supply voltage output voltage swing vs load current temperature ( c) 70 output short-circuit current (ma) 80 140 130 120 100 90 110 50 ?5 25 100 125 50 75 0 1364/1365 g10 v s = 5v source sink output short-circuit current vs temperature load resistance ( w ) 10 60 open-loop gain (db) 65 85 100 10k 1364/1365 g06 75 70 1k 80 v s = 5v v s = 15v t a = 25 c supply voltage ( v) v output voltage swing (v) 1.0 0.5 1.5 2.0 v + 0.5 ?.0 ?.5 ?.0 10 5 01520 1364/1365 g08 r l = 1k t a = 25 c r l = 500 w r l = 500 w r l = 1k settling time (ns) ?0 output step (v) ? ? ? 10 8 6 4 ? 2 0 0 40 80 100 60 20 1364/1365 g12 v s = 15v a v = 1 r f = 1k c f = 3pf 10mv 10mv 1mv 1mv output current (ma) v output voltage swing (v) 1.0 1.5 0.5 v + 0.5 1.0 1.5 2.0 2.0 50 40 ?0 30 40 50 01020 ?0 ?0 1364/1365 g09 v s = 5v v in = 100mv 85 c 85 c 25 c ?0 c ?0 c 25 c settling time (ns) ?0 output step (v) ? ? ? 10 8 6 4 ? 2 0 0 40 80 100 60 20 1364/1365 g11 v s = 15v a v = 1 r l = 1k 10mv 10mv 1mv 1mv
7 lt1364/LT1365 gain bandwidth and phase margin vs temperature temperature ( c) 30 gain bandwidth (mhz) 50 130 110 70 90 40 120 100 60 80 0 phase margin (deg) 5 10 50 45 35 40 20 25 15 30 50 ?5 25 100 125 50 75 0 1364/1365 g16 phase margin v s = 5v gain bandwidth v s = 5v phase margin v s = 15v gain bandwidth v s = 15v 1364/1365 g21 frequency (hz) 100k ?20 crosstalk (db) ?00 ?10 ?0 1m 100m ?0 ?0 10m ?0 ?0 ?0 ?0 ?0 t a = 25 c a v = 1 v in = 0dbm v s = ?5v r l = 1k v s = 5v r l = 500 w crosstalk vs frequency gain and phase vs frequency typical perfor m a n ce characteristics u w frequency (hz) 10k 0.01 output impedance ( w ) 0.1 100 100k 100m 1364/1365 g13 1m 1 10m 10 a v = 100 a v = 10 a v = 1 v s = 15v t a = 25 c output impedance vs frequency frequency response vs capacitive load frequency (hz) 1m ?5 voltage magnitude (db) ? ?2 15 100m 1364/1365 g18 3 ? 10m 9 ? 6 0 12 v s = 15v t a = 25 c a v = ? c = 1000pf c = 500pf c = 100pf c = 50pf c = 0 supply voltage ( v) 30 gain bandwidth (mhz) 70 50 130 110 90 60 40 120 100 80 30 phase margin (deg) 38 34 50 48 44 40 36 32 46 42 10 5 01520 1364/1365 g15 t a = 25 c phase margin gain bandwidth gain bandwidth and phase margin vs supply voltage frequency (hz) 0 common-mode rejection ratio (db) 40 20 120 100 80 60 1k 100m 10m 1m 100k 10k 1364/1365 g20 v s = 15v t a = 25 c common mode rejection ratio vs frequency frequency (hz) 100k ?0 gain (db) ? ? 10 1m 100m 1364/1365 g17 2 ? 10m 6 ? 4 0 8 15v 2.5v t a = 25 c a v = 1 r l = 1k 5v frequency response vs supply voltage (a v = 1) frequency (hz) 10k ?0 gain (db) 0 70 100k 100m 1364/1365 g14 1m 30 40 10 20 10m 50 60 phase (deg) 120 40 60 0 20 80 100 v s = 15v v s = 5v v s = 5v v s = 15v phase gain t a = 25 c a v = ? r f = r g = 1k frequency (hz) 0 power supply rejection ratio (db) 40 20 100 80 60 100k 1m 1k 10k 100 10m 100m 1364/1365 g19 v s = 15v t a = 25 c +psrr psrr power supply rejection ratio vs frequency
8 lt1364/LT1365 typical perfor m a n ce characteristics u w supply voltage ( v) 0 slew rate (v/ m s) 600 400 200 2200 1600 1800 2000 2400 1400 1200 1000 800 015 10 5 1364/1365 g22 t a = 25 c a v = ? r f = r g = 1k sr = sr + + sr 2 slew rate vs input level slew rate vs temperature total harmonic distortion vs frequency frequency (hz) 100k 1m 0 output voltage (v p-p ) 30 10m 1364/1365 g26 15 5 10 25 20 a v = ? a v = 1 v s = 15v r l = 1k a v = 1, 1% max distortion a v = ?, 2% max distortion undistorted output swing vs frequency ( 15v) undistorted output swing vs frequency ( 5v) frequency (hz) 100k 1m 0 output voltage (v p-p ) 10 10m 1364/1365 g27 6 2 4 8 a v = ? a v = 1 v s = 5v r l = 1k 2% max distortion slew rate vs supply voltage 2nd and 3rd harmonic distortion vs frequency frequency (hz) 100k 200k 400k ?00 ?0 ?0 ?0 ?0 ?0 harmonic distortion (db) ?0 10m 1364/1365 g28 1m 2m 4m v s = 15v v o = 2v p-p r l = 500 w a v = 2 3rd harmonic 2nd harmonic capacitive load (f) 10p 0 overshoot (%) 100 1 m 1364/1365 g30 1000p 0.01 m 50 100p 0.1 m a v = 1 a v = ? t a = 25? v s = 15v capacitive load handling input level (v p-p ) 0 slew rate (v/ m s) 400 600 200 2000 1800 1600 1400 800 1200 1000 0 8 16 20 12 4 21018 14 6 1364/1365 g24 t a = 25 c v s = 15v a v = ? r f = r g = 1k sr = sr + + sr 2 temperature ( c) 200 slew rate (v/ m s) 400 1400 1200 600 800 1000 50 ?5 25 100 125 50 75 0 1364/1365 g23 sr + + sr sr = ? 2 v s = 5v v s = 15v a v = 2 frequency (hz) 10 0.0001 total harmonic distortion (%) 0.01 100 100k 1364/1365 g25 1k 0.001 10k a v = ? a v = 1 t a = 25 c v o = 3v rms r l = 500 w supply voltage (v) 0.0 differential phase (deg) 0.2 0.1 0.3 differential gain (%) 0.2 0.1 0 10 5 15 1364/1365 g29 differential gain differential phase a v = 2 r l = 150 w t a = 25 c differential gain and phase vs supply voltage
9 lt1364/LT1365 small-signal transient (a v = 1) typical perfor m a n ce characteristics u w small-signal transient (a v = C1) small-signal transient (a v = C1, c l = 200pf) 1364/1365 ta31 1364/1365 ta32 1364/1365 ta33 large-signal transient (a v = 1, c l = 10,000pf) large-signal transient (a v = C1) large-signal transient (a v = 1) 1364/1365 ta36 1364/1365 ta34 1364/1365 ta35 applicatio n s i n for m atio n wu u u layout and passive components the lt1364/LT1365 amplifiers are easy to use and toler- ant of less than ideal layouts. for maximum performance (for example, fast 0.01% settling) use a ground plane, short lead lengths, and rf-quality bypass capacitors (0.01 m f to 0.1 m f). for high drive current applications use low esr bypass capacitors (1 m f to 10 m f tantalum). the parallel combination of the feedback resistor and gain setting resistor on the inverting input combine with the input capacitance to form a pole which can cause peaking or oscillations. if feedback resistors greater than 5k w are used, a parallel capacitor of value c f > r g x c in /r f should be used to cancel the input pole and optimize dynamic performance. for unity-gain applications where a large feedback resistor is used, c f should be greater than or equal to c in . input considerations each of the lt1364/LT1365 inputs is the base of an npn and a pnp transistor whose base currents are of opposite polarity and provide first-order bias current cancellation. because of variation in the matching of npn and pnp beta, the polarity of the input bias current can be positive or negative. the offset current does not depend on npn/pnp beta matching and is well controlled. the use of balanced source resistance at each input is recommended for applications where dc accuracy must be maximized. the inputs can withstand transient differential input volt- ages up to 10v without damage and need no clamping or source resistance for protection. differential inputs, how- ever, generate large supply currents (tens of ma) as required for high slew rates. if the device is used with sustained differential inputs, the average supply current will increase, excessive power dissipation will result and the part may be damaged. the part should not be used as
10 lt1364/LT1365 a comparator, peak detector or other open-loop applica- tion with large, sustained differential inputs . under normal, closed-loop operation, an increase of power dis- sipation is only noticeable in applications with large slewing outputs and is proportional to the magnitude of the differential input voltage and the percent of the time that the inputs are apart. measure the average supply current for the application in order to calculate the power dissipa- tion. capacitive loading the lt1364/LT1365 are stable with any capacitive load. this is accomplished by sensing the load induced output pole and adding compensation at the amplifier gain node. as the capacitive load increases, both the bandwidth and phase margin decrease so there will be peaking in the frequency domain and in the transient response as shown in the typical performance curves. the photo of the small signal response with 200pf load shows 62% peaking. the large signal response shows the output slew rate being limited to 10v/ m s by the short-circuit current. coaxial cable can be driven directly, but for best pulse fidelity a resistor of value equal to the characteristic impedance of the cable (i.e., 75 w ) should be placed in series with the output. the other end of the cable should be terminated with the same value resistor to ground. circuit operation the lt1364/LT1365 circuit topology is a true voltage feedback amplifier that has the slewing behavior of a current feedback amplifier. the operation of the circuit can be understood by referring to the simplified schematic. the inputs are buffered by complementary npn and pnp emitter followers which drive a 500 w resistor. the input voltage appears across the resistor generating currents which are mirrored into the high impedance node. comple- mentary followers form an output stage which buffers the gain node from the load. the bandwidth is set by the input resistor and the capacitance on the high impedance node. the slew rate is determined by the current available to charge the gain node capacitance. this current is the differential input voltage divided by r1, so the slew rate is proportional to the input. highest slew rates are therefore seen in the lowest gain configurations. for example, a 10v applicatio n s i n for m atio n wu u u output step in a gain of 10 has only a 1v input step, whereas the same output step in unity gain has a 10 times greater input step. the curve of slew rate vs input level illustrates this relationship. the lt1364/LT1365 are tested for slew rate in a gain of C2 so higher slew rates can be expected in gains of 1 and C1, and lower slew rates in higher gain configurations. the rc network across the output stage is bootstrapped when the amplifier is driving a light or moderate load and has no effect under normal operation. when driving a capacitive load (or a low value resistive load) the network is incompletely bootstrapped and adds to the compensa- tion at the high impedance node. the added capacitance slows down the amplifier which improves the phase margin by moving the unity-gain frequency away from the pole formed by the output impedance and the capacitive load. the zero created by the rc combination adds phase to ensure that even for very large load capacitances, the total phase lag can never exceed 180 degrees (zero phase margin) and the amplifier remains stable. power dissipation the lt1364/LT1365 combine high speed and large output drive in small packages. because of the wide supply voltage range, it is possible to exceed the maximum junction temperature under certain conditions. maximum junction temperature (t j ) is calculated from the ambient temperature (t a ) and power dissipation (p d ) as follows: lt1364cn8: t j = t a + (p d x 130 c/w) lt1364cs8: t j = t a + (p d x 190 c/w) LT1365cn: t j = t a + (p d x 110 c/w) LT1365cs: t j = t a + (p d x 150 c/w) worst case power dissipation occurs at the maximum supply current and when the output voltage is at 1/2 of either supply voltage (or the maximum swing if less than 1/2 supply voltage). for each amplifier p dmax is: p dmax = (v + C v C )(i smax ) + (v + /2) 2 /r l example: LT1365 in s16 at 70 c, v s = 5v, r l = 150w p dmax = (10v)(8.4ma) + (2.5v) 2 /150 w = 126mw t jmax = 70 c + (4 x 126mw)(150 c/w) = 145 c
11 lt1364/LT1365 1364/1365 ss01 out +in ?n v + v r1 500 w c c r c c w i spl ii f ed s w a ch e ti c information furnished by linear technology corporation is believed to be accurate and reliable. however, no responsibility is assumed for its use. linear technology corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. dimension in inches (millimeters) unless otherwise noted. package descriptio n u n8 package 8-lead pdip (narrow 0.300) (ltc dwg # 05-08-1510) n package 14-lead pdip (narrow 0.300) (ltc dwg # 05-08-1510) n8 1098 0.100 (2.54) bsc 0.065 (1.651) typ 0.045 ?0.065 (1.143 ?1.651) 0.130 0.005 (3.302 0.127) 0.020 (0.508) min 0.018 0.003 (0.457 0.076) 0.125 (3.175) min 0.009 ?0.015 (0.229 ?0.381) 0.300 ?0.325 (7.620 ?8.255) 0.325 +0.035 0.015 +0.889 0.381 8.255 () 12 3 4 87 6 5 0.255 0.015* (6.477 0.381) 0.400* (10.160) max *these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed 0.010 inch (0.254mm) n14 1098 0.020 (0.508) min 0.125 (3.175) min 0.130 0.005 (3.302 0.127) 0.045 ?0.065 (1.143 ?1.651) 0.065 (1.651) typ 0.018 0.003 (0.457 0.076) 0.100 (2.54) bsc 0.005 (0.125) min 0.009 ?0.015 (0.229 ?0.381) 0.300 ?0.325 (7.620 ?8.255) 0.325 +0.035 0.015 +0.889 0.381 8.255 () 0.255 0.015* (6.477 0.381) 0.770* (19.558) max 3 1 2 4 5 6 7 8 9 10 11 12 13 14 *these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed 0.010 inch (0.254mm)
12 lt1364/LT1365 13645fa lt/tp 0400 2k rev a ? printed in usa ? linear technology corporation 1994 dimension in inches (millimeters) unless otherwise noted. package descriptio n u linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 l fax: (408) 434-0507 l www.linear-tech.com s8 package 8-lead plastic small outline (narrow 0.150) (ltc dwg # 05-08-1610) s package 16-lead plastic small outline (narrow 0.150) (ltc dwg # 05-08-1610) part number description comments lt1363 70mhz, 1000v/ m s op amp single version of lt1364/LT1365 lt1361/lt1362 dual and quad 50mhz, 800v/ m s op amps lower power version of lt1364/LT1365, v os = 1mv, 4ma/amplifier lt1358/lt1359 dual and quad 25mhz, 600v/ m s op amps lower power version of lt1364/LT1365, v os = 0.6mv, 2ma/amplifier lt1813 dual 100mhz, 700v/ m s op amps low voltage, low power lt1364/LT1365, 3ma/amplifier related parts 0.016 ?0.050 (0.406 ?1.270) 0.010 ?0.020 (0.254 ?0.508) 45 0 ?8 typ 0.008 ?0.010 (0.203 ?0.254) so8 1298 0.053 ?0.069 (1.346 ?1.752) 0.014 ?0.019 (0.355 ?0.483) typ 0.004 ?0.010 (0.101 ?0.254) 0.050 (1.270) bsc 1 2 3 4 0.150 ?0.157** (3.810 ?3.988) 8 7 6 5 0.189 ?0.197* (4.801 ?5.004) 0.228 ?0.244 (5.791 ?6.197) dimension does not include mold flash. mold flash shall not exceed 0.006" (0.152mm) per side dimension does not include interlead flash. interlead flash shall not exceed 0.010" (0.254mm) per side * ** 0.016 ?0.050 (0.406 ?1.270) 0.010 ?0.020 (0.254 ?0.508) 45 0 ?8 typ 0.008 ?0.010 (0.203 ?0.254) s16 1098 0.053 ?0.069 (1.346 ?1.752) 0.014 ?0.019 (0.355 ?0.483) typ 0.004 ?0.010 (0.101 ?0.254) 0.050 (1.270) bsc 1 2 3 4 5 6 7 8 0.150 ?0.157** (3.810 ?3.988) 16 15 14 13 0.386 ?0.394* (9.804 ?10.008) 12 11 10 9 dimension does not include mold flash. mold flash shall not exceed 0.006" (0.152mm) per side dimension does not include interlead flash. interlead flash shall not exceed 0.010" (0.254mm) per side * ** 0.228 ?0.244 (5.791 ?6.197) typical applicatio n s u two op amp instrumentation amplifier 2mhz, 4th order butterworth filter 1364/1365 ta01 v in trim r5 for gain trim r1 for common-mode rejection bw = 700khz r1 10k r2 1k r5 220 w r4 10k r3 1k v out + + + 1/2 lt1364 1/2 lt1364 gain r r r r r r rr r = ? ? + ? ? ? ? + ? ? ? ? + + () ? ? = 4 3 1 1 2 2 1 3 4 23 5 102 1364/1365 ta04 v in 549 w 1.13k 22pf 464 w 47pf 470pf v out + + 549 w 1.33k 464 w 220pf 1/2 lt1364 1/2 lt1364

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