View LT1125MPSWPBF_8599361.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

lt1124/lt1125 1 11245ff for more information www.linear.com/lt1124 n 100% tested low voltage noise: 2.7 nv/ hz typ 4.2 nv/ hz max n slew rate: 4.5v/s typ n gain-bandwidth product: 12.5mhz typ n offset voltage, prime grade: 70v max low grade : 100 v max n high voltage gain: 5 million min n supply current per amplifier: 2.75ma max n common mode rejection: 112db min n power supply rejection: 116db min n available in 8-pin so package typical application description dual/quad low noise, high speed precision op amps the lt ? 1124 dual and lt1125 quad are high performance op amps that offer higher gain, slew rate and bandwidth than the industry standard op-27 and competing op-270/ op-470 op amps. in addition, the lt1124/lt1125 have lower i b and i os than the op-27; lower v os and noise than the op-270/op-470. in the design, processing and testing of the device, par- ticular attention has been paid to the optimization of the entire distribution of several key parameters. slew rate, gain bandwidth and 1 khz noise are 100% tested for each individual amplifier. consequently, the specifications of even the lowest cost grades ( the lt1124c and the lt1125c) have been spectacularly improved compared to equivalent grades of competing amplifiers. power consumption of the lt1124 is one-half of two op-27s. low power and high performance in an 8- pin so package make the lt1124 a first choice for surface mounted systems and where board space is restricted. for a decompensated version of these devices, with three times higher slew rate and bandwidth, please see the lt1126/lt1127 data sheet. l , lt , lt c , lt m , linear technology and the linear logo are registered trademarks of linear technology corporation. all other trademarks are the property of their respective owners. protected by u.s. patents including 4775884, 4837496. features applications n tw o and three op amp instrumentation amplifiers n low noise signal processing n active filters n microvolt accuracy threshold detection n strain gauge amplifiers n direct coupled audio gain stages n tape head preamplifiers n infrared detectors instrumentation amplifier with shield driver input offset voltage distribution (all packages, lt1124 and lt1125) + C 1/4 lt1125 1124/25 ta01 + C C + 1/4 lt1125 1/4 lt1125 C15v 15v output 1/4 lt1125 30k 1k r f 3.4kr g 100r f 3.4k 30k 1k 5 4 6 11 7 1 32 10 9 8 14 1312 +C input guard guard = 30 (1 + r f /r g ) 1000 = 170khz= 400khz = 3.8v/ hz at output = 35v gain power bw small-signal bw noise v os r g 100 + C input offset voltage (v) C100 percent of units 10 20 30 60 1124/25 ta02 C60 C20 v s = 15v t a = 25c dualsquads 2316 units tested 758200 100 20 0 downloaded from: http:///
lt1124/lt1125 2 11245ff for more information www.linear.com/lt1124 absolute maximum ratings supply voltage ........................................................ 22 v input voltages ............................ equal to supply voltage output short - circuit duration .......................... indefinite differential input current ( note 6) ....................... 25 ma lead temperature ( soldering , 10 sec ) ................... 300 c storage temperature range .................. C65 c to 150 c (note 1) 12 3 4 87 6 5 top view Cin aout a v + out b +in a v C +in bCin b s8 package 8-lead plastic so a b t jmax = 140c, ja = 190c/w note: this pin configuration differs from the 8-pin pdip configuration. instead, it follows the rotated lt1013ds8 so package pin locations 12 3 4 87 6 5 top view v + out bCin b +in b out a Cin a+in a v C s8 package 8-lead plastic so a b t jmax = 150c, ja = 190c/w 12 3 4 87 6 5 top view out a Cin a+in a v C v + out bCin b +in b n8 package 8-lead pdip a b t jmax = 140c, ja = 130c/w obsolete pinout j8 package 8-lead ceramic dip t jmax = 160c, ja = 100c/w obsolete package consider the n8 for alternate source 12 3 4 5 6 7 8 top view sw package 16-lead plastic so wide 1615 14 13 12 11 10 9 out a Cin a+in a v + +in bCin b out b nc out dCin d +in d v C +in cCin c out c nc b a c d t jmax = 140c, ja = 130c/w 12 3 4 5 6 7 top view n package 14-lead pdip 1413 12 11 10 98 out a Cin a+in a v + +in bCin b out b out dCin d +in d v C +in cCin c out c b a c d t jmax = 140c, ja = 110c/w (n) j package 14-lead ceramic dip t jmax = 160c, ja = 80c/w obsolete package consider the n for alternate source pin configuration operating temperature range lt 1124 a c / lt 1124 c lt 1125 a c / lt 1125 c ( note 10) .............. C40 c to 85 c lt 1124 ai / lt 11 24 i ................................ C40 c to 85 c lt 1124 a mp / lt 1125 mp ...................... C55 c to 125 c lt 1124 am / lt 11 24 m lt 1125 am / lt 11 25 m obsolete ......................................... C55 c to 125 c downloaded from: http:///
lt1124/lt1125 3 11245ff for more information www.linear.com/lt1124 order information lead free finish tape and reel part marking* package description specified temperature range lt1124cs8#pbf lt1124cs8#trpbf 1124 8-lead plastic so, rotated pinout 0c to 70c lt1124ais8#pbf lt1124ais8#trpbf 1124ai 8-lead plastic so, rotated pinout C40c to 85c lt1124is8#pbf lt1124is8#trpbf 1124i 8-lead plastic so, rotated pinout C40c to 85c lt1124amps8#pbf lt1124amps8#trpbf 124amp 8-lead plastic so, rotated pinout C55c to 125c lt1124cs8-1#pbf lt1124cs8-1#trpbf 11241 8-lead plastic so, standard pinout 0c to 70c lt1124ais8-1#pbf lt1124ais8-1#trpbf 11241 8-lead plastic so, standard pinout C40c to 85c lt1124is8-1#pbf lt1124is8-1#trpbf 11241 8-lead plastic so, standard pinout C40c to 85c lt1124amps8-1#pbf lt1124amps8-1#trpbf 11241 8-lead plastic so, standard pinout C55c to 125c obsolete pinout lt1125csw#pbf lt1125csw#trpbf lt1125csw 16-lead plastic so wide 0c to 70c lt1125mpsw lt1125mpsw#tr lt1125mpsw 16-lead plastic so wide C55c to 125c lt1124acn8#pbf lt1124acn8#trpbf lt1124acn8 8-lead pdip 0c to 70c lt1124cn8#pbf lt1124cn8#trpbf lt1124cn8 8-lead pdip 0c to 70c lt1125acn#pbf lt1125acn#trpbf lt1125acn 14-lead pdip 0c to 70c lt1125cn#pbf lt1125cn#trpbf lt1125cn 14-lead pdip 0c to 70c lead based finish tape and reel part marking* package description specified temperature range lt1124cs8 lt1124cs8#tr 1124 8-lead plastic so, rotated pinout 0c to 70c lt1124ais8 lt1124ais8#tr 1124ai 8-lead plastic so, rotated pinout C40c to 85c lt1124is8 lt1124is8#tr 1124i 8-lead plastic so, rotated pinout C40c to 85c lt1125csw lt1125csw#tr lt1125csw 16-lead plastic so wide 0c to 70c lt1124acn8 lt1124acn8#tr lt1124acn8 8-lead pdip 0c to 70c lt1124cn8 lt1124cn8#tr lt1124cn8 8-lead pdip 0c to 70c lt1125acn lt1125acn#tr lt1125acn 14-lead pdip 0c to 70c lt1125cn lt1125cn#tr lt1125cn 14-lead pdip 0c to 70c lt1124cj8 lt1124cj8#tr lt1124cj8 8-lead ceramic dip 0c to 70c lt1124amj8 lt1124amj8#tr lt1124amj8 8-lead ceramic dip C55c to 125c lt1124mj8 lt1124mj8#tr lt1124mj8 8-lead ceramic dip C55c to 125c lt1125cj lt1125cj#tr lt1125cj 14-lead ceramic dip 0c to 70c lt1125amj lt1125amj#tr lt1125amj 14-lead ceramic dip C55c to 125c lt1125mj lt1125mj#tr lt1125mj 14-lead ceramic dip C55c to 125c obsolete package consult lt c marketing for parts specified with wider operating temperature ranges . * the temperature grade is identified by a label on the shipping container . for more information on lead free part marking, go to: http://www.linear.com/leadfree/ for more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ downloaded from: http:///
lt1124/lt1125 4 11245ff for more information www.linear.com/lt1124 electrical characteristics t a = 25c, v s = 15v, unless otherwise noted. symbol parameter conditions (note 2) lt1124ac/ai/am lt1125ac/am lt 1124c/i/m lt1125c/m units min typ max min typ max v os input offset voltage lt1124 lt1125 20 25 70 90 25 30 100 140 v v ?v os ?time long-term input offset voltage stability 0.3 0.3 v/mo i os input offset current lt1124 lt1125 5 6 15 20 6 7 20 30 na na i b input bias current 7 20 8 30 na e n input noise voltage 0.1hz to 10hz (notes 8, 9) 70 200 70 nv p-p input noise voltage density f o = 10hz (note 5) f o = 1000hz (note 3) 3.0 2.7 5.5 4.2 3.0 2.7 5.5 4.2 nv/ hz nv/ hz i n input noise current density f o = 10hz f o = 1000hz 1.3 0.3 1.3 0.3 pa/ hz pa/ hz v cm input voltage range 12 12.8 12 12.8 v cmrr common mode rejection ratio v cm = 12v 112 126 106 124 db psrr power supply rejection ratio v s = 4v to 18v 116 126 110 124 db a vol large-signal voltage gain r l 10k, v out = 10v r l 2k, v out = 10v 5 2 17 4 3.0 1.5 15 3 v/v v/v v out maximum output voltage swing r l 2k 13 13.8 12.5 13.8 v sr slew rate r l 2k (notes 3, 7) 3 4.5 2.7 4.5 v/s gbw gain-bandwidth product f o = 100khz (note 3) 9 12.5 8 12.5 mhz z o open-loop output resistance v out = 0, i out = 0 75 75 i s supply current per amplifier 2.3 2.75 2.3 2.75 ma channel separation f 10hz (note 9) v out = 10v, r l = 2k 134 150 130 150 db the l denotes the specifications which apply over the ?55c t a 125c temperature range, v s = 15v, unless otherwise noted. symbol parameter conditions (note 2) lt1124am lt1125am lt 1124m lt1125m units min typ max min typ max v os input offset voltage lt1124 lt1125 l l 50 55 170 190 60 70 250 290 v v ?v os ?temp average input offset voltage drift (note 5) l 0.3 1.0 0.4 1.5 v/c i os input offset current lt1124 lt1125 l l 18 18 45 55 20 20 60 70 na na i b input bias current l 18 55 20 70 na v cm input voltage range l 11.3 12 11.3 12 v cmrr common mode rejection ratio v cm = 11.3v l 106 122 100 120 db psrr power supply rejection ratio v s = 4v to 18v l 110 122 104 120 db a vol large-signal voltage gain r l 10k, v out = 10v r l 2k, v out = 10v l l 3 1 10 3 2.0 0.7 10 2 v/v v/v v out maximum output voltage swing r l 2k l 12.5 13.6 12 13.6 v sr slew rate r l 2k (notes 3, 7) l 2.3 3.8 2 3.8 v/s i s supply current per amplifier l 2.5 3.25 2.5 3.25 ma downloaded from: http:///
lt1124/lt1125 5 11245ff for more information www.linear.com/lt1124 symbol parameter conditions (note 2) lt1124ac lt1125ac lt 1124c lt1125c units min typ max min typ max v os input offset voltage lt1124 lt1125 l l 35 40 120 140 45 50 170 210 v v ?v os ?temp average input offset voltage drift (note 5) l 0.3 1 0.4 1.5 v/c i os input offset current lt1124 lt1125 l l 6 7 25 35 7 8 35 45 na na i b input bias current l 8 35 9 45 na v cm input voltage range l 11.5 12.4 11.5 12.4 v cmrr common mode rejection ratio v cm = 11.5v l 109 125 102 122 db psrr power supply rejection ratio v s = 4v to 18v l 112 125 107 122 db a vol large-signal voltage gain r l 10k, v out = 10v r l 2k, v out = 10v l l 4.0 1.5 15 3.5 2.5 1.0 14 2.5 v/v v/v v out maximum output voltage swing r l 2k l 12.5 13.7 12 13.7 v sr slew rate r l 2k (notes 3, 7) l 2.6 4 2.4 4 v/s i s supply current per amplifier l 2.4 3 2.4 3 ma electrical characteristics the l denotes the specifications which apply over the 0c t a 70c temperature range, v s = 15v, unless otherwise noted. the l denotes the specifications which apply over the ?40 c t a 85 c temperature range, v s = 15 v , unless otherwise noted . ( note 10) symbol parameter conditions (note 2) lt1124ac/ai lt1125ac lt 1124c/i lt1125c units min typ max min typ max v os input offset voltage lt1124 lt1125 l l 40 45 140 160 50 55 200 240 v v ?v os ?temp average input offset voltage drift (note 5) l 0.3 1 0.4 1.5 v/c i os input offset current lt1124 lt1125 l l 15 15 40 50 17 17 55 65 na na i b input bias current l 15 50 17 65 na v cm input voltage range l 11.4 12.2 11.4 12.2 v cmrr common mode rejection ratio v cm = 11.4v l 107 124 101 121 db psrr power supply rejection ratio v s = 4v to 18v l 111 124 106 121 db a vol large-signal voltage gain r l 10k, v out = 10v r l 2k, v out = 10v l l 3.5 1.2 12 3.2 2.2 0.8 12 2.3 v/v v/v v out maximum output voltage swing r l 2k l 12.5 13.6 12 13.6 v sr slew rate r l 2k (notes 3, 7) l 2.4 3.9 2.1 3.9 v/s i s supply current per amplifier l 2.4 3.25 2.4 3.25 ma downloaded from: http:///
lt1124/lt1125 6 11245ff for more information www.linear.com/lt1124 typical performance characteristics 0.1hz to 10hz voltage noise 0.01hz to 1hz voltage noise voltage noise vs frequency current noise vs frequency input bias or offset current vs temperature voltage exceeds 1.4v, the input current should be limited to 25ma. note 7: slew rate is measured in a v = C1; input signal is 7.5v, output measured at 2.5v. note 8: 0.1hz to 10hz noise can be inferred from the 10hz noise voltage density test. see the test circuit and frequency response curve for 0.1hz to 10hz tester in the applications information section of the lt1007 or lt1028 data sheets. note 9: this parameter is guaranteed but not tested. note 10: the lt1124c/lt1125c and lt1124ac/lt1125ac are guaranteed to meet specified performance from 0c to 70c and are designed, characterized and expected to meet these extended temperature limits, but are not tested at C40c and 85c. the lt1124ai and lt1124i are guaranteed to meet the extended temperature limits. note 1: stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. exposure to any absolute maximum rating condition for extended periods may affect device reliability and lifetime. note 2: typical parameters are defined as the 60% yield of parameter distributions of individual amplifiers; i.e., out of 100 lt1125s (or 100 lt1124s) typically 240 op amps (or 120) will be better than the indicated specification. note 3: this parameter is 100% tested for each individual amplifier. note 4: this parameter is sample tested only. note 5: this parameter is not 100% tested. note 6: the inputs are protected by back-to-back diodes. current limiting resistors are not used in order to achieve low noise. if differential input electrical characteristics time (seconds) 0 voltage noise (40nv/div) 2 6 8 10 1124/25 g01 4 time (seconds) 0 voltage noise (40nv/div) 20 60 80 100 1124/25 g02 40 frequency (hz) 3 rms voltage noise density (nv / hz ) 10 30 100 0.1 10 100 1000 1124/25 g03 1 1.0 maximum typical v s = 15v t a = 25c 1/f corner 2.3hz frequency (hz) 0.3 rms current noise densit y (pa/ hz ) 1.0 3.0 10.0 10 1k 10k 1124 g04 0.1 100 v s = 15v t a = 25c typical maximum 1/f corner100hz temperature (c) C75 0 input bias or offset current (na) 10 20 30 C50 25 75 125 1124/25 g05 C25 0 50 100 lt1124m/lt1125m lt1124am/lt1125am v s = 15v downloaded from: http:///
lt1124/lt1125 7 11245ff for more information www.linear.com/lt1124 output short-circuit current vs time typical performance characteristics voltage gain vs frequency voltage gain vs temperature gain, phase shift vs frequency input offset voltage drift distribution input bias current over the common mode range common mode rejection ratio vs frequency power supply rejection ratio vs frequency time from output sho rt to gnd (minutes) 0 0 20 40 50 2 3 4 lt1124 g06 1 v s = 15v 10 30 C10C20 C30 C40 C50 125c 25c 125c short-circuit current (ma) sinking sourcing C55c 25c C55c common mode input voltage (v) C15 C20 input bias current (na) C10 5 20 C10 5 15 1124/25 g07 C5 10 C15 0 10 C5 15 0 device with positive input current device with negative input current v s = 15v t a = 25c frequency (hz) 80 common mode rejection ratio (db) 100 120 140 160 1k 100k 1m 10m 1124/25 g08 10k 6040 20 0 t a = 25c v s = 15v v cm = 10v frequency (hz) 1 0 power supply rejection ratio (db) 20 40 120 140 160 10 2 10 8 1124/25 g09 10 10 3 10 4 10 5 10 6 10 7 60 100 80 Cpsrr +psrr t a = 25c frequency (hz) 0.01 C20 voltage gain (db) 20 140 180 1 100 10k 100m 1124/25 g10 60 100 1m v s = 15v t a = 25c temperature (c) C75 0 voltage gain (v/v) 6 12 20 C50 25 75 125 1124/25 g11 C25 0 50 100 lt1124am/lt1125am 2 4 8 10 14 16 18 lt1124m/lt1125m l l lt1124am/lt1125am lt1124m/lt1125m r = 10k r = 2k v = 15vv = 10v s out frequency (mhz) 0.1 C10 voltaeg gain (db) 0 30 40 50 1 10 100 1124/25 g12 10 20 gain ? v s = 15v t a = 25c c l = 10pf phase shift (degrees) 180 120 80 140160 100200 input offset voltage drift (v/c) C0.8 percent of units 10 20 30 0.4 0.8 1124/25 g13 C0.4 0 n8s8 j8 396 units tested 200 100 96 v s = 15v 40 0 downloaded from: http:///
lt1124/lt1125 8 11245ff for more information www.linear.com/lt1124 typical performance characteristics common mode limit vs temperature channel separation vs frequency warm-up drift small-signal transient response large-signal transient response output voltage swing vs load current 1124/25 g16 a vcl = +1 v s = 15v or 5v c l = 15pf 0 50mv C50mv 1124/25 g17 a vcl = C1 v s = 15v 0 10mv C10mv output current (ma) C8 output voltage swing (v) 1.0 C1.6 C1.4 4 8 1124/25 g18 C6 0 C10 C4 C2 2 6 10 0.4 0.6 0.8 1.2 C1.2 C1.0 C0.8 i sink i source v C v + 125c C55c C55c 125c 25c v s = 3v to 18v 25c temperature (c) C60 0.5 common mode limit (v) referred to power supply 1.0 1.5 C2.0 C1.5 C1.0 C0.5 C20 20 60 140 1124/25 g19 2.0 2.5 C2.5 100 v + = 3v to 18v v C = C3v to C18v v C v + frequency (hz) 0 0 channel separation (db) 20 60 80 120 160 180 100 10k 100k 10m 1124/25 g20 1k 1m 40 100 140 limited by thermal interaction limited by pin to pin capacitance v s = 15v r l = 2k v out = 7v p-p t a = 25c time after power on (minutes) 0 0 change in offset voltage (v) 2 4 8 10 1 2 3 5 1124/25 g21 4 6 v s = 15v t a = 25c so package n, j packages offset voltage drift with temperature of representative units supply current vs supply voltage temperature (c) C50 C50 offset voltage (v) C20 20 C25 75 125 1124/25 g14 0 25 50 100 C40 C30 0 10 30 40 50 C10 v s = 15v supply voltage (v) 0 0 supply current per amplifier (ma) 1 2 3 5 10 15 20 1124/25 g15 125c 25c C55c downloaded from: http:///
lt1124/lt1125 9 11245ff for more information www.linear.com/lt1124 typical performance characteristics total harmonic distortion and noise vs output amplitude for noninverting gain total harmonic distortion and noise vs output amplitude for inverting gain intermodulation distortion (ccif method)* vs frequency lt1124 and op270 total harmonic distortion and noise vs frequency for noninverting gain total harmonic distortion and noise vs frequency for inverting gain total harmonic distortion and noise vs frequency for competitive devices frequency (hz) total harmonic distortion + noise (%) 0.010 0.1 20 1k 10k 20k 1124/25 g22 100 0.001 0.0001 z l = 2k/15pf v o = 20v p-p a v = +1, +10, +100 measurement bandwidth = 10hz to 80khz a v = +1 a v = +10 a v = +100 frequency (hz) total harmonic distortion + noise (%) 0.010 0.1 20 1k 10k 20k 1124/25 g23 100 0.001 0.0001 z l = 2k/15pf v o = 20vp-p a v = C1, C10, C100 measurement bandwidth = 10hz to 80khz a v = C1 a v = C10 a v = C100 frequency (hz) total harmonic distortion + noise (%) 0.010 0.1 20 1k 10k 20k 1124/25 g24 100 0.001 0.0001 z l = 2k/15pf v o = 20vp-p a v = C10 measurement bandwidth = 10hz to 80khz lt1124 op270 op27 output swing (v p-p ) total harmonic distortion + noise (%) 0.1 1 0.3 10 30 1124/25 g25 1 0.010 0.0001 z l = 2k/15pf f o = 1khz a v = +1, +10, +100 measurement bandwidth = 10hz to 22khz a v = +1 a v = +10 a v = +100 0.001 output swing (vp-p) total harmonic distortion + noise (%) 0.1 1 0.3 10 30 1124/25 g26 1 0.010 0.0001 z l = 2k/15pf f o = 1khz a v = C1, C10, C100 measurement bandwidth = 10hz to 22khz a v = C1 a v = C10 a v = C100 0.001 frequency (hz) intermodulation distortion (imd)(%) 3k 10k 20k 1124/25 g27 0.010 0.0001 z l = 2k/15pf f (im) = 1khzf o = 13.5khz v o = 20vp-p a v = C10 measurement bandwidth = 10hz to 80khz lt1124 0.001 op270 downloaded from: http:///
lt1124/lt1125 10 11245ff for more information www.linear.com/lt1124 applications information the lt1124 may be inserted directly into op-270 sock- ets. the lt1125 plugs into op-470 sockets. of course, all standard dual and quad bipolar op amps can also be replaced by these devices.matching specifications in many applications the performance of a system depends on the matching between two op amps, rather than the individual characteristics of the two devices. the three op amp instrumentation amplifier configuration shown i n this data sheet is an example. matching characteristics are not 100% tested on the lt1124/lt1125. some specifications are guaranteed by definition. for example , 70 v maximum offset voltage implies that mis - match cannot be more than 140 v . 112 db (= 2.5 v/v) cmrr means that worst-case cmrr match is 106 db figure 1. test circuit for offset voltage and offset voltage drift with temperature (5v/v). however, table 1 can be used to estimate the expected matching performance between the two sides of the lt1124, and between amplifiers a and d, and between amplifiers b and c of the lt1125. offset voltage and drift thermocouple effects, caused by temperature gradients across dissimilar metals at the contacts to the input termi - nals, can exceed the inherent drift of the amplifier unless p roper care is e xercised. air currents should be minimized , package leads should be short, the two input leads should be close together and maintained at the same temperature. the circuit shown in figure 1 to measure offset voltage is also used as the burn-in configuration for the lt1124/ lt1125, with the supply voltages increased to 16v. C + 100*50k* 50k* 15v C15v v out v out = 1000v os *resistors must have low thermoelectric potential 1124/25 f01 table 1. expected match lt1124ac/am lt1125ac/am lt1124c/m lt1125c/m parameter 50% yield 98% yield 50% yield 98% yield units v os match, ?v os lt1124 20 110 30 130 v lt1125 30 150 50 180 v temperature coefficient match 0.35 1.0 0.5 1.5 v/c average noninverting i b 6 18 7 25 na match of noninverting i b 7 22 8 30 na cmrr match 126 115 123 112 db psrr match 127 118 127 114 db downloaded from: http:///
lt1124/lt1125 11 11245ff for more information www.linear.com/lt1124 applications information figure 3. unity-gain buffer applications figure 4. competing quad op amp noise test method high speed operation when the feedback around the op amp is resistive ( r f ), a pole will be created with r f , the source resistance and capacitance ( r s , c s ), and the amplifier input capacitance (c in 2 pf ). in low closed loop gain configurations and with r s and r f in the kilohm range , this pole can create excess phase shift and even oscillation . a small capacitor ( c f ) in parallel with r f eliminates this problem ( see figure 2). with r s ( c s + c in ) = r f c f, the effect of the feedback pole is completely removed . during the fast feedthrough-like portion of the output, the input protection diodes effectively short the output to the input and a current, limited only by the output short circuit protection, will be drawn by the signal generator. with r f 500?, the output is capable of handling the current requirements (i l 20ma at 10v) and the amplifier stays in its active mode and a smooth transition will occur. noise testing each individual amplifier is tested to 4.2 nv/ hz voltage noise; i.e., for the lt1124 two tests, for the lt1125 four tests are performed. noise testing for competing multiple op amps, if done at all, may be sample tested or tested using the circuit shown in figure 4. e n out = (e na ) 2 + (e nb ) 2 + (e nc ) 2 + (e nd ) 2 if the lt1125 were tested this way, the noise limit would be 4 ? (4.2 nv/ hz ) 2 = 8.4 nv/ hz . but is this an effective screen? what if three of the four amplifiers are at a typical 2.7nv/ hz , and the fourth one was contaminated and has 6.9nv/ hz noise? rms sum = (2.7) 2 + (2.7) 2 + (2.7) 2 + (6.9) 2 = 8.33 nv/ hz this passes an 8.4 nv/ hz spec, yet one of the ampli- fiers is 64% over the lt1125 spec limit. clearly, for proper noise measurement, the op amps have to be tested individually. unity gain buffer applications when r f 100? and the input is driven with a fast, large signal pulse (>1 v), the output waveform will look as shown in figure 3. figure 2. high speed operation + C 1124/25 f03 output 4.5v/s r f 1124/25 f04 + C a + C b + C c + C d out C + output 1124/25 f02 r s c s r f c f c in downloaded from: http:///
lt1124/lt1125 12 11245ff for more information www.linear.com/lt1124 performance comparison typical applications C + output 1124/25 ta03 365 1% input 15k 5% 340k 1% 20k trim 15v 1/2 lt1124 C15v rn60c film resistors the high gain and wide bandwidth of the lt1124/lt1125, is useful in lowfrequency high closed-loop gain amplifier applications. a typical precision op amp may have an open-loop gain of one million with 500khz bandwidth. as the gain error plot shows, this device is capable of 0.1% amplifying accuracy up to 0.3hz only. even instrumentation range signals can vary at a faster rate. the lt1124/lt1125 gain precision bandwidth product is 75 times higher, as shown. frequency (hz) gain error (percent) 0.01 0.1 1.0 0.1 10 100 1124/25 ta04 0.001 1 gain error = closed-loop gain open-loop gain typical precision op amp lt1124/lt1125 gain 1000 amplifier with 0.01% accuracy, dc to 1hz gain error vs frequency closed-loop gain = 1000 table 2 summarizes the performance of the lt1124 / lt1125 compared to the low cost grades of alternate approaches. the comparison shows how the specs of the lt1124/ lt1125 not only stand up to the industry standard op-27, but in most cases are superior. normally dual and quad performance is degraded when compared to singles, for the lt1124/lt1125 this is not the case. table 2. guaranteed performance, v s = 15v, t a = 25c, low cost devices parameter/units lt1124cn8 lt1125cn op-27 gp op-270 gp op-470 gp units voltage noise, 1khz 4.2 100% tested 4.5 sample tested C no limit 5.0 sample tested nv / hz slew rate 2.7 100% tested 1.7 not tested 1.7 1.4 v/s gain-bandwidth product 8.0 100% tested 5.0 not tested C no limit C no limit mhz offset voltage lt1124 lt1125 100 140 100 C 250 C C 1000 v v offset current lt1124 lt1125 20 30 75 C 20 C C 30 na na bias current 30 80 60 60 na supply current/amp 2.75 5.67 3.25 2.75 ma voltage gain, r l = 2k 1.5 0.7 0.35 0.4 v/v common mode rejection ratio 106 100 90 100 db power supply rejection ratio 110 94 104 105 db so-8 package yes C lt1124 yes no C downloaded from: http:///
lt1124/lt1125 13 11245ff for more information www.linear.com/lt1124 schematic diagram (1/2 lt1124, 1/4 lt1125) 1124/25 ss 200a 100a 200 6k 200 6k 50 200a v C 100a v + output q11 q2b q1b q1a inverting input (C) noninverting input (+) q13 q9 q8 q7 21k 21k 200pf 3.6k 3.6k 360a v + v + 20pf 35pf 900 400 67pf q2a 570a q25 2020 v C q12 q3 q15 q16 q22 q23 q24 q17 q19 q20 q18 q26 q30 q28 q27 q29 q10 downloaded from: http:///
lt1124/lt1125 14 11245ff for more information www.linear.com/lt1124 package description please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. obsolete package j8 package 8-lead cerdip (narrow .300 inch, hermetic) (reference ltc dwg # 05-08-1110) j8 0801 .014 C .026 (0.360 C 0.660) .200 (5.080) max .015 C .060 (0.381 C 1.524) .125 3.175 min .100 (2.54) bsc .300 bsc (7.62 bsc) .008 C .018 (0.203 C 0.457) 0 C 15 .005 (0.127) min .405 (10.287) max .220 C .310 (5.588 C 7.874) 1 2 3 4 8 7 6 5 .025 (0.635) rad typ .045 C .068 (1.143 C 1.650) full lead option .023 C .045 (0.584 C 1.143) half lead option corner leads option (4 plcs) .045 C .065 (1.143 C 1.651) note: lead dimensions apply to solder dip/plate or tin plate leads downloaded from: http:///
lt1124/lt1125 15 11245ff for more information www.linear.com/lt1124 s8 package 8-lead plastic small outline (narrow .150 inch) (reference ltc dwg # 05-08-1610 rev g) n8 package 8-lead pdip (narrow .300 inch) (reference ltc dwg # 05-08-1510 rev i) .016 C .050 (0.406 C 1.270) .010 C .020 (0.254 C 0.508) 45 0 C 8 typ .008 C .010 (0.203 C 0.254) so8 rev g 0212 .053 C .069 (1.346 C 1.752) .014 C .019 (0.355 C 0.483) typ .004 C .010 (0.101 C 0.254) .050 (1.270) bsc 1 2 3 4 .150 C .157 (3.810 C 3.988) note 3 8 7 6 5 .189 C .197 (4.801 C 5.004) note 3 .228 C .244 (5.791 C 6.197) .245 min .160 .005 recommended solder pad layout .045 .005 .050 bsc .030 .005 typ inches (millimeters) note:1. dimensions in 2. drawing not to scale 3. these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed .006" (0.15mm) 4. pin 1 can be bevel edge or a dimple please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. package description n8 rev i 0711 .065 (1.651) typ .045 C .065 (1.143 C 1.651) .130 .005 (3.302 0.127) .020 (0.508) min .018 .003 (0.457 0.076) .120 (3.048) min .008 C .015 (0.203 C 0.381) .300 C .325 (7.620 C 8.255) .325 +.035C.015 +0.889C0.381 8.255 ( ) 1 2 3 4 8 7 6 5 .255 .015* (6.477 0.381) .400* (10.160) max note:1. dimensions are inches millimeters *these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed .010 inch (0.254mm) .100 (2.54) bsc downloaded from: http:///
lt1124/lt1125 16 11245ff for more information www.linear.com/lt1124 obsolete package j package 14-lead cerdip (narrow .300 inch, hermetic) (reference ltc dwg # 05-08-1110) please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. package description j14 0801 .045 C .065 (1.143 C 1.651) .100 (2.54) bsc .014 C .026 (0.360 C 0.660) .200 (5.080) max .015 C .060 (0.381 C 1.524) .125 (3.175) min .300 bsc (7.62 bsc) .008 C .018 (0.203 C 0.457) 0 C 15 1 2 3 4 5 6 7 .220 C .310 (5.588 C 7.874) .785 (19.939) max .005 (0.127) min 14 11 8 9 10 13 12 .025 (0.635) rad typ note: lead dimensions apply to solder dip/plate or tin plate leads downloaded from: http:///
lt1124/lt1125 17 11245ff for more information www.linear.com/lt1124 package description n package 14-lead pdip (narrow .300 inch) (reference ltc dwg # 05-08-1510 rev i) please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. n14 rev i 0711 .020 (0.508) min .120 (3.048) min .130 .005 (3.302 0.127) .045 C .065 (1.143 C 1.651) .065 (1.651) typ .018 .003 (0.457 0.076) .005 (0.127) min .255 .015* (6.477 0.381) .770* (19.558) max 3 1 2 4 5 6 7 8 9 10 11 12 13 14 .008 C .015 (0.203 C 0.381) .300 C .325 (7.620 C 8.255) .325 +.035C.015 +0.889 C0.381 8.255 ( ) note:1. dimensions are inches millimeters *these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed .010 inch (0.254mm) .100 (2.54) bsc downloaded from: http:///
lt1124/lt1125 18 11245ff for more information www.linear.com/lt1124 package description sw package 16-lead plastic small outline (wide .300 inch) (reference ltc dwg # 05-08-1620) s16 (wide) 0502 note 3 .398 C .413 (10.109 C 10.490) note 4 16 15 14 13 12 11 10 9 1 n 2 3 4 5 6 7 8 n/2 .394 C .419 (10.007 C 10.643) .037 C .045 (0.940 C 1.143) .004 C .012 (0.102 C 0.305) .093 C .104 (2.362 C 2.642) .050 (1.270) bsc .014 C .019 (0.356 C 0.482) typ 0 C 8 typ note 3 .009 C .013 (0.229 C 0.330) .005 (0.127) rad min .016 C .050 (0.406 C 1.270) .291 C .299 (7.391 C 7.595) note 4 45 .010 C .029 (0.254 C 0.737) inches (millimeters) note:1. dimensions in 2. drawing not to scale 3. pin 1 ident, notch on top and cavities on the bottom of packages are the manufacturing options. the part may be supplied with or without any of the options 4. these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed .006" (0.15mm) .420 min .325 .005 recommended solder pad layout .045 .005 n 1 2 3 n/2 .050 bsc .030 .005 typ please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. downloaded from: http:///
lt1124/lt1125 19 11245ff for more information www.linear.com/lt1124 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. revision history rev date description page number d 09/10 lt1124-1 added. reflected throughout the data sheet. 1 to 18 e 10/10 revised part marking for lt1124amps8-1 in order information section. 3 f 01/14 lt1124-1 removed. 1 to 3 (revision history begins at rev d) downloaded from: http:///
lt1124/lt1125 20 11245ff for more information www.linear.com/lt1124 ? linear technology corporation 1992 lt 0114 rev f ? printed in usa linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax : (408) 434-0507 www.linear.com/lt1124 related parts typical application part number description comments lt1007 single low noise, precision op amp 2.5nv/ hz 1khz voltage noise lt1028/lt1128 single low noise, precision op amps 0.85nv/ hz voltage noise lt1112/lt1114 dual/quad precision picoamp input 250pa max i b lt1113 dual low noise jfet op amp 4.5nv/ hz voltage noise, 10fa/ hz current noise lt1126/lt1127 decompensated lt1124/lt1125 11v/s slew rate lt1169 dual low noise jfet op amp 6nv/ hz voltage noise, 1fa/ hz current noise, 10pa max i b lt1792 single lt1113 4.2nv/ hz voltage noise, 10fa/ hz current noise lt1793 single lt1169 6nv/ hz voltage noise, 1fa/ hz current noise, 10pa max i b 1124/25 ta05 C + C + C + lt1009 32 2.5v 5k 1/4 lt1125 1k C15v 15v 1 referenceoutput 15v C15v 7 413 6 5 10kzero trim 301k* 350 bridge 1f 301k* 0v to 10voutput 499* gain trim 50k *rn60c film resistors 1k 14 C15v 15v 1312 the lt1124/lt1125 is capable of providing excitation current directly to bias the 350 bridge at 5v with only 5v across the bridge (as opposed to the usual 10v) total power dissipation and bridge warm-up drift is reduced. the bridge output signal is halved, but the lt1124/lt1125 can amplify the reduced signal accurately. 1/4 lt1125 1/4 lt1125 strain gauge signal conditioner with bridge excitation downloaded from: http:///

▲Up To Search▲

Price & Availability of LT1125MPSWPBF

	To Download LT1125MPSWPBF Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .