View LT1356_5469008.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1 lt1355/LT1356 dual and quad 12mhz, 400v/ m s op amps 1355/1356 ta01 v in 5.23k 10.2k 47pf 6.81k 100pf 1000pf v out + + 5.23k 11.3k 6.81k 330pf 1/2 lt1355 1/2 lt1355 100khz, 4th order butterworth filter 1355/1356 ta02 a v = C1 large-signal response n 12mhz gain bandwidth n 400v/ m s slew rate n 1.25ma maximum supply current per amplifier n unity-gain stable n c-load tm op amp drives all capacitive loads n 10nv/ ? hz input noise voltage n 800 m v maximum input offset voltage n 300na maximum input bias current n 70na maximum input offset current n 12v/mv minimum dc gain, r l =1k n 230ns settling time to 0.1%, 10v step n 280ns settling time to 0.01%, 10v step n 12.5v minimum output swing into 500 w n 3v minimum output swing into 150 w n specified at 2.5v, 5v, and 15v the lt1355/LT1356 are dual and quad low power high speed operational amplifiers with outstanding ac and dc performance. the amplifiers feature much lower supply current and higher slew rate than devices with comparable bandwidth. 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 500 w load to 12.5v with 15v supplies and a 150 w load to 3v on 5v supplies. the amplifiers are stable with any capacitive load making them useful in buffer applications. the lt1355/LT1356 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 lt1355/LT1356 see the lt1354 data sheet. for higher bandwidth devices with higher supply currents see the lt1357 through lt1365 data sheets. bandwidths of 25mhz, 50mhz, and 70mhz are available with 2ma, 4ma, and 6ma of supply current per amplifier. singles, duals, and quads of each amplifier are available. n wideband amplifiers n buffers n active filters n data acquisition systems n photodiode amplifiers c-load is a trademark of linear technology corporation. applicatio s u features typical applicatio u descriptio u , ltc and lt are registered trademarks of linear technology corporation.
2 lt1355/LT1356 symbol parameter conditions v supply min typ max units v os input offset voltage 15v 0.3 0.8 mv 5v 0.3 0.8 mv 2.5v 0.4 1.0 mv i os input offset current 2.5v to 15v 20 70 na i b input bias current 2.5v to 15v 80 300 na e n input noise voltage f = 10khz 2.5v to 15v 10 nv/ ? hz i n input noise current f = 10khz 2.5v to 15v 0.6 pa/ ? hz r in input resistance v cm = 12v 15v 70 160 m w input resistance differential 15v 11 m w c in input capacitance 15v 3 pf 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 7) .. C 40 c to 85 c specified temperature range (note 8) ... C 40 c to 85 c maximum junction temperature (see below) plastic package ................................................ 150 c storage temperature range ................. C 65 c to 150 c lead temperature (soldering, 10 sec).................. 300 c package/order i n for m atio n w u u order part number order part number t jmax = 150 c, q ja = 190 c/ w t jmax = 150 c, q ja = 130 c/ w lt1355cs8 s8 part marking 1355 lt1355cn8 order part number order part number LT1356cs LT1356cn t jmax = 150 c, q ja = 150 c/ w t jmax = 150 c, q ja = 110 c/ w t a = 25 c, v cm = 0v unless otherwise noted. electrical characteristics consult factory for industrial and military grade parts. 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 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 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 (note 1)
3 lt1355/LT1356 input voltage range + 15v 12.0 13.4 v 5v 2.5 3.5 v 2.5v 0.5 1.1 v input voltage range C 15v C13.2 C12.0 v 5v C3.4 C2.5 v 2.5v C0.9 C0.5 v cmrr common mode rejection ratio v cm = 12v 15v 83 97 db v cm = 2.5v 5v 78 84 db v cm = 0.5v 2.5v 68 75 db psrr power supply rejection ratio v s = 2.5v to 15v 92 106 db a vol large-signal voltage gain v out = 12v, r l = 1k 15v 12 36 v/mv v out = 10v, r l = 500 w 15v 5 15 v/mv v out = 2.5v, r l = 1k 5v 12 36 v/mv v out = 2.5v, r l = 500 w 5v 5 15 v/mv v out = 2.5v, r l = 150 w 5v 1 4 v/mv v out = 1v, r l = 500 w 2.5v 5 20 v/mv v out output swing r l = 1k, v in = 40mv 15v 13.3 13.8 v r l = 500 w , v in = 40mv 15v 12.5 13.0 v r l = 500 w , v in = 40mv 5v 3.5 4.0 v r l = 150 w , v in = 40mv 5v 3.0 3.3 v r l = 500 w , v in = 40mv 2.5v 1.3 1.7 v i out output current v out = 12.5v 15v 25 30 ma v out = 3v 5v 20 25 ma i sc short-circuit current v out = 0v, v in = 3v 15v 30 42 ma sr slew rate a v = C 2, (note 4) 15v 200 400 v/ m s 5v 70 120 v/ m s full power bandwidth 10v peak, (note 5) 15v 6.4 mhz 3v peak, (note 5) 5v 6.4 mhz gbw gain bandwidth f = 200khz, r l = 2k 15v 9.0 12.0 mhz 5v 7.5 10.5 mhz 2.5v 9.0 mhz t r , t f rise time, fall time a v = 1, 10%-90%, 0.1v 15v 14 ns 5v 17 ns overshoot a v = 1, 0.1v 15v 20 % 5v 18 % propagation delay 50% v in to 50% v out , 0.1v 15v 16 ns 5v 19 ns t s settling time 10v step, 0.1%, a v = C1 15v 230 ns 10v step, 0.01%, a v = C1 15v 280 ns 5v step, 0.1%, a v = C1 5v 240 ns 5v step, 0.01%, a v = C1 5v 380 ns differential gain f = 3.58mhz, a v = 2, r l = 1k 15v 2.2 % 5v 2.1 % differential phase f = 3.58mhz, a v = 2, r l = 1k 15v 3.1 deg 5v 3.1 deg r o output resistance a v = 1, f = 100khz 15v 0.7 w channel separation v out = 10v, r l = 500 w 15v 100 113 db i s supply current each amplifier 15v 1.0 1.25 ma each amplifier 5v 0.9 1.20 ma symbol parameter conditions v supply min typ max units t a = 25 c, v cm = 0v unless otherwise noted. electrical characteristics
4 lt1355/LT1356 v os input offset voltage 15v l 1.0 mv 5v l 1.0 mv 2.5v l 1.2 mv input v os drift (note 6) 2.5v to 15v l 58 m v/ c i os input offset current 2.5v to 15v l 100 na i b input bias current 2.5v to 15v l 450 na cmrr common mode rejection ratio v cm = 12v 15v l 81 db v cm = 2.5v 5v l 77 db v cm = 0.5v 2.5v l 67 db psrr power supply rejection ratio v s = 2.5v to 15v l 90 db a vol large-signal voltage gain v out = 12v, r l = 1k 15v l 10.0 v/mv v out = 10v, r l = 500 w 15v l 3.3 v/mv v out = 2.5v, r l = 1k 5v l 10.0 v/mv v out = 2.5v, r l = 500 w 5v l 3.3 v/mv v out = 2.5v, r l = 150 w 5v l 0.6 v/mv v out = 1v, r l = 500 w 2.5v l 3.3 v/mv v out output swing r l = 1k, v in = 40mv 15v l 13.2 v r l = 500 w , v in = 40mv 15v l 12.0 v r l = 500 w , v in = 40mv 5v l 3.4 v r l = 150 w , v in = 40mv 5v l 2.8 v r l = 500 w , v in = 40mv 2.5v l 1.2 v i out output current v out = 12v 15v l 24.0 ma v out = 2.8v 5v l 18.7 ma i sc short-circuit current v out = 0v, v in = 3v 15v l 24 ma sr slew rate a v = C 2, (note 4) 15v l 150 v/ m s 5v l 60 v/ m s gbw gain bandwidth f = 200khz, r l = 2k 15v l 7.5 mhz 5v l 6.0 mhz channel separation v out = 10v, r l = 500 w 15v l 98 db i s supply current each amplifier 15v l 1.45 ma each amplifier 5v l 1.40 ma symbol parameter conditions v supply min typ max units electrical characteristics symbol parameter conditions v supply min typ max units 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 8) v os input offset voltage 15v l 1.5 mv 5v l 1.5 mv 2.5v l 1.7 mv input v os drift (note 6) 2.5v to 15v l 58 m v/ c i os input offset current 2.5v to 15v l 200 na i b input bias current 2.5v to 15v l 550 na cmrr common mode rejection ratio v cm = 12v 15v l 80 db v cm = 2.5v 5v l 76 db v cm = 0.5v 2.5v l 66 db psrr power supply rejection ratio v s = 2.5v to 15v l 90 db a vol large-signal voltage gain v out = 12v, r l = 1k 15v l 7.0 v/mv v out = 10v, r l = 500 w 15v l 1.7 v/mv v out = 2.5v, r l = 1k 5v l 7.0 v/mv v out = 2.5v, r l = 500 w 5v l 1.7 v/mv
5 lt1355/LT1356 symbol parameter conditions v supply min typ max units electrical characteristics v out = 2.5v, r l = 150 w 5v l 0.4 v/mv v out = 1v, r l = 500 w 2.5v l 1.7 v/mv v out output swing r l = 1k, v in = 40mv 15v l 13.0 v r l = 500 w , v in = 40mv 15v l 11.5 v r l = 500 w , v in = 40mv 5v l 3.4 v r l = 150 w , v in = 40mv 5v l 2.6 v r l = 500 w , v in = 40mv 2.5v l 1.2 v i out output current v out = 11.5v 15v l 23.0 ma v out = 2.6v 5v l 17.3 ma i sc short-circuit current v out = 0v, v in = 3v 15v l 23 ma sr slew rate a v = C 2, (note 4) 15v l 120 v/ m s 5v l 50 v/ m s gbw gain bandwidth f = 200khz, r l = 2k 15v l 7.0 mhz 5v l 5.5 mhz channel separation v out = 10v, r l = 500 w 15v l 98 db i s supply current each amplifier 15v l 1.50 ma each amplifier 5v l 1.45 ma 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: 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. typical perfor m a n ce characteristics u w input common mode range vs supply voltage supply current vs supply voltage and temperature 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 1355/1356 g02 t a = 25 c d v os < 1mv input bias current vs input common mode voltage input common mode voltage (v) ?0 input bias current (na) 0 200 150 100 50 ?5 ?0 0 10 15 5 ? 1355/1356 g03 v s = 15v t a = 25 c i b = ? ? i b + + i b 2 note 5: full power bandwidth is calculated from the slew rate measurement: fpbw = (sr)/2 p v p . note 6: this parameter is not 100% tested. note 7: the lt1355c/LT1356c are guaranteed functional over the operating temperature range of C40 c to 85 c. note 8: the lt1355c/LT1356c are guaranteed to meet specified performance from 0 c to 70 c. the lt1355c/LT1356c 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. the l denotes the specifications which apply over the temperature range C40 c t a 85 c, v cm = 0v unless otherwise noted. (note 8) supply voltage ( v) 0.4 supply current (ma) 0.8 0.6 1.4 1.2 1.0 10 5 01520 1355/1356 g01 ?5 c 25 c 125 c
6 lt1355/LT1356 typical perfor m a n ce characteristics u w settling time vs output step (noninverting) open-loop gain vs temperature output short-circuit current vs temperature settling time (ns) ?0 output swing (v) ? ? ? 10 8 6 4 ? 2 0 50 200 300 350 250 100 150 1355/1356 g11 v s = 15v a v = 1 10mv 10mv 1mv 1mv supply voltage ( v) v output voltage swing (v) 1 2 3 v + ? ? ? 10 5 01520 1355/1356 g08 r l = 1k r l = 500 w t a = 25? r l = 500 w r l = 1k output voltage swing vs supply voltage temperature ( c) 88 open-loop gain (db) 90 89 97 96 95 94 92 91 93 50 ?5 25 100 125 50 75 0 1355/1356 g07 v s = 15v r l = 1k v o = 12v temperature ( c) 20 output short-circuit current (ma) 25 65 60 55 40 35 30 45 50 50 ?5 25 100 125 50 75 0 1355/1356 g10 v s = 5v sink source settling time (ns) ?0 output swing (v) ? ? ? 10 8 6 4 ? 2 0 50 200 300 350 250 100 150 1355/1356 g12 v s = 15v a v = ? 10mv 10mv 1mv 1mv settling time vs output step (inverting) output voltage swing vs load current output current (ma) v ? + 0.5 output voltage swing (v) 1.5 2.0 1.0 v + 0.5 1.0 1.5 2.0 2.5 2.5 50 40 ?0 30 40 50 01020 ?0 ?0 1355/1356 g09 v s = 5v v in = 100mv 85 c 85 c 25 c ?0 c ?0 c 25 c open-loop gain vs resistive load load resistance ( w ) 10 50 open-loop gain (db) 60 100 100 10k 1355/1356 g06 80 70 1k 90 v s = 5v v s = 15v t a = 25 c 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 1355/1356 g05 v s = 15v t a = 25 c a v = 101 r s = 100k input noise spectral density temperature ( c) 0 input bias current (na) 50 25 200 175 150 75 125 100 50 ?5 25 100 125 50 75 0 1355/1356 g04 v s = 15v i b = ? ? i b + + i b 2 input bias current vs temperature
7 lt1355/LT1356 typical perfor m a n ce characteristics u w gain bandwidth and phase margin vs temperature temperature ( c) 8 gain bandwidth (mhz) 10 18 16 12 14 9 11 17 13 15 32 phase margin (deg) 34 36 52 50 46 48 40 42 38 44 50 ?5 25 100 125 50 75 0 1355/1356 g16 phase margin v s = 15v gain bandwidth v s = 5v phase margin v s = 5v gain bandwidth v s = 15v output impedance vs frequency frequency (hz) voltage magnitude (db) ? ? ?0 10 1355/1356 g19 2 ? 6 ? 4 0 8 v s = 15v t a = 25 c a v = ? 100k 1m 100m 10m c = 1000pf c = 500pf c = 100pf c = 50pf c = 0 frequency (hz) 0 power supply rejection ratio (db) 40 20 100 80 60 100k 1m 1k 10k 100 10m 100m 1355/1356 g20 psrr +psrr v s = 15v t a = 25 c power supply rejection ratio vs frequency frequency (hz) 0 common-mode rejection ratio (db) 40 20 120 100 80 60 1k 100m 10m 1m 100k 10k 1355/1356 g21 v s = 15v t a = 25 c common mode rejection ratio vs frequency frequency (hz) 10k ?0 gain (db) 0 70 100k 100m 1355/1356 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 gain v s = 15v phase t a = 25? a v = ? r f = r g = 2k gain and phase vs frequency frequency (hz) 100k ? gain (db) ? ? 5 1m 100m 1355/1356 g17 1 ? 10m 3 ? 2 0 4 5v 15v 2.5v t a = 25 c a v = 1 r l = 2k frequency response vs supply voltage (a v = 1) frequency response vs supply voltage (a v = C1) frequency (hz) 100k ? gain (db) ? ? 5 1m 100m 1355/1356 g18 1 ? 10m 3 ? 2 0 4 15v 2.5v t a = 25 c a v = ? r f = r g = 2k 5v supply voltage ( v) 8 gain bandwidth (mhz) 12 10 18 16 14 11 9 17 15 13 30 phase margin (deg) 38 34 50 48 44 40 36 32 46 42 10 5 01520 1355/1356 g15 t a = 25 c phase margin gain bandwidth gain bandwidth and phase margin vs supply voltage frequency response vs capacitive load frequency (hz) 10k 0.01 output impedance ( w ) 1k 100k 100m 1355/1356 g13 1m 10 0.1 1 10m 100 a v = 1 a v = 100 a v = 10 v s = 15v t a = 25 c
8 lt1355/LT1356 typical perfor m a n ce characteristics u w input level (v p-p ) 0 slew rate (v/ m s) 100 500 400 200 300 0 8 16 20 12 4 21018 14 6 1355/1356 g24 t a = 25? v s = 15v a v = ? r f = r g = 2k sr = sr + + sr 2 slew rate vs input level slew rate vs temperature temperature ( c) 50 slew rate (v/ m s) 100 350 300 150 200 250 50 ?5 25 100 125 50 75 0 1355/1356 g23 sr + + sr sr = ? 2 v s = 5v v s = 15v a v = 2 frequency (hz) 100k 1m 0 output voltage (v p-p ) 30 10m 1355/1356 g26 15 5 10 25 20 a v = ? a v = 1 v s = 15v r l = 5k a v = 1, 1% max distortion a v = ?, 4% 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 1355/1356 g27 6 2 4 8 a v = ? a v = 1 v s = 5v r l = 5k a v = 1, 2% max distortion a v = ?, 3% max distortion capacitive load (f) 10p 0 overshoot (%) 100 1 m 1355/1356 g30 1000p 0.01 m 50 100p 0.1 m a v = 1 a v = ? t a = 25? v s = 15v capacitive load handling crosstalk vs frequency slew rate vs supply voltage total harmonic distortion vs frequency frequency (hz) 10 0.0001 total harmonic distortion (%) 0.1 100 100k 1355/1356 g25 1k 0.001 0.01 10k a v = ? t a = 25 c v o = 3v rms r l = 2k a v = 1 supply voltage ( v) 0 slew rate (v/ m s) 200 100 600 500 400 300 015 10 5 1355/1356 g22 t a = 25? a v = ? r f = r g = 2k sr = sr + + sr 2 2nd and 3rd harmonic distortion vs frequency frequency (hz) 100k 200k 400k ?0 ?0 ?0 ?0 ?0 ?0 harmonic distortion (db) ?0 10m 1355/1356 g28 1m 2m 4m v s = 15v v o = 2v p-p r l = 2k a v = 2 3rd harmonic 2nd harmonic frequency (hz) 100k ?20 crosstalk (db) ?0 1m 100m 1355/1356 g29 10m ?0 ?0 ?0 ?0 ?0 ?00 ?10 t a = 25? v in = 0dbm r l = 500 w a v = 1
9 lt1355/LT1356 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 = 1000pf) applicatio n s i n for m atio n wu u u 1355/1356 g31 1355/1356 g32 1355/1356 g33 large-signal transient (a v = 1, c l = 10,000pf) large-signal transient (a v = C1) large-signal transient (a v = 1) 1355/1356 g36 1355/1356 g34 1355/1356 g35 layout and passive components the lt1355/LT1356 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 .
10 lt1355/LT1356 capacitive loading the lt1355/LT1356 are stable with any capacitive load. 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. 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. input considerations each of the lt1355/LT1356 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 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. applicatio n s i n for m atio n wu u u circuit operation the lt1355/LT1356 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 an 800 w resistor. the input voltage appears across the resistor generating currents which are mirrored into the high impedance node. complementary 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 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 lt1355/ LT1356 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.
11 lt1355/LT1356 1355/1356 ss01 out +in ?n v + v r1 800 w c c r c c sche atic w w si plified power dissipation the lt1355/LT1356 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: lt1355cn8: t j = t a + (p d x 130 c/w) lt1355cs8: t j = t a + (p d x 190 c/w) LT1356cn: t j = t a + (p d x 110 c/w) LT1356cs: 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: LT1356 in s16 at 70 c, v s = 15v, r l = 1k p dmax = (30v)(1.45ma) + (7.5v) 2 /1kw = 99.8mw t jmax = 70 c + (4 99.8mw)(150 c/w) = 130 c applicatio n s i n for m atio n wu u u
12 lt1355/LT1356 dimensions in inches (millimeters) unless otherwise noted. package descriptio u n8 package 8-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 12 3 4 87 6 5 0.255 0.015* (6.477 0.381) 0.400* (10.160) max 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 () *these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed 0.010 inch (0.254mm)
13 lt1355/LT1356 n package 14-lead pdip (narrow 0.300) (ltc dwg # 05-08-1510) dimensions in inches (millimeters) unless otherwise noted. package descriptio u 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 0.255 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 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 () *these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed 0.010 inch (0.254mm)
14 lt1355/LT1356 s8 package 8-lead plastic small outline (narrow 0.150) (ltc dwg # 05-08-1610) dimensions in inches (millimeters) unless otherwise noted. package descriptio u 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 * **
15 lt1355/LT1356 s package 16-lead plastic small outline (narrow 0.150) (ltc dwg # 05-08-1610) dimensions in inches (millimeters) unless otherwise noted. package descriptio u 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) 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) 0.228 ?0.244 (5.791 ?6.197) 12 11 10 9 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 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 * ** 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.
16 lt1355/LT1356 13556fa lt/tp 0400 2k rev a ? printed in usa ? linear technology corporation 1994 linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 l fax: (408) 434-0507 l www.linear-tech.com part number description comments lt1354 12mhz, 400v/ m s op amp single version of lt1355/LT1356 lt1352/lt1353 dual and quad 250 m a, 3mhz, 200v/ m s op amps lower power version of lt1355/LT1356, v os = 0.6mv, i s = 250 m a/amplifier lt1358/lt1359 dual and quad 25mhz, 600v m s op amps faster version of lt1355/LT1356, v os = 0.6mv, i s = 2ma/amplifier typical applicatio n s u instrumentation amplifier 100khz, 4th order butterworth filter (sallen-key) 1355/1356 ta03 v in trim r5 for gain trim r1 for common-mode rejection bw = 120khz r1 20k r2 2k r5 432 w r4 20k r3 2k v out + + + 1/2 lt1355 1/2 lt1355 a r r r r r r rr r v =+ + ? ? ? ? + + ? ? = 4 3 1 1 2 2 1 3 4 23 5 104 1355/1356 ta04 v in v out r1 2.87k r3 2.43k 1/2 lt1355 + c1 100pf r2 26.7k c2 330pf c4 1000pf r4 15.4k c3 68pf + 1/2 lt1355 related parts

▲Up To Search▲

Price & Availability of LT1356

	To Download LT1356 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .