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1 lt1007/lt1037 100737fb features descriptio u applicatio s u typical applicatio u low noise, high speed precision operational amplifiers n guaranteed 4.5nv/ ? hz 10hz noise n guaranteed 3.8nv/ ? hz 1khz noise n 0.1hz to 10hz noise, 60nv p-p typical n guaranteed 7 million min voltage gain, r l = 2k n guaranteed 3 million min voltage gain, r l = 600 w n guaranteed 25 m v max offset voltage n guaranteed 0.6 m v/ c max drift with temperature n guaranteed 11v/ m s min slew rate (lt1037) n guaranteed 117db min cmrr the lt ? 1007/lt1037 series features the lowest noise performance available to date for monolithic operational amplifiers: 2.5nv/ ? hz wideband noise (less than the noise of a 400 w resistor), 1/f corner frequency of 2hz and 60nv peak- to-peak 0.1hz to 10hz noise. low noise is combined with outstanding precision and speed specifications: 10 m v offset voltage, 0.2 m v/ c drift, 130db common mode and power supply rejection, and 60mhz gain bandwidth product on the decompensated lt1037, which is stable for closed-loop gains of 5 or greater. the voltage gain of the lt1007/lt1037 is an extremely high 20 million driving a 2k w load and 12 million driving a 600 w load to 10v. in the design, processing and testing of the device, particular attention has been paid to the optimization of the entire distribution of several key parameters. consequently, the specifications of even the lowest cost grades (the lt1007c and the lt1037c) have been spectacularly improved com- pared to equivalent grades of competing amplifiers. the sine wave generator application shown below utilizes the low noise and low distortion characteristics of the lt1037. , ltc and lt are registered trademarks of linear technology corporation. ultrapure 1khz sine wave generator time (sec) 0246 8 10 voltage noise (20nv/div) 1007/37 ta02 n low noise signal processing n microvolt accuracy threshold detection n strain gauge amplifiers n direct coupled audio gain stages n sine wave generators n tape head preamplifiers n microphone preamplifiers 1007/37 ta01 430 w output c cr r 6 2 3 #327 lamp + lt1037 f = 1 2 rc r = 1591.5 w 0.1% c = 0.1 m f 0.1% total harmonic distortion = < 0.0025% noise = < 0.0001% amplitude = 8v output frequency = 1.000khz for values given 0.4% 0.1hz to 10hz noise
2 lt1007/lt1037 100737fb absolute m axi m u m ratings w ww u package/order i n for m atio n w u u supply voltage ...................................................... 22v input voltage ............................ equal to supply voltage output short-circuit duration .......................... indefinite differential input current (note 9) ..................... 25ma storage temperature range ................. C 65 c to 150 c top view v + v os trim v os trim ?n out nc +in v (case) 8 7 6 5 1 4 h package 8-lead to-5 metal can + 2 3 t jmax = 150 c, q ja = 150 c/ w, q jc = 45 c/ w 1 2 3 4 8 7 6 5 top view v os trim v os trim v + out nc ?n +in v + n8 package 8-lead pdip top view s8 package 8-lead plastic so 1 2 3 4 8 7 6 5 v os trim v os trim v + out nc ?n +in v + t jmax = 150 c, q ja = 190 c/ w order part number order part number order part number 1007 1007i 1037 1037i lt1007acn8 lt1007cn8 lt1007in8 lt1037acn8 lt1037cn8 lt1037in8 lt1007ach lt1007amh lt1007ch lt1007mh lt1037ach lt1037amh lt1037ch lt1037mh t jmax = 100 c, q ja = 130 c/ w (n8) s8 part marking lt1007cs8 lt1007is8 lt1037cs8 lt1037is8 (note 1) consult ltc marketing for parts specified with wider operating temperature ranges. lead temperature (soldering, 10 sec.)................. 300 c operating temperature range lt1007/lt1037ac, c ............................. 0 c to 70 c lt1007/lt1037i ............................... C 40 c to 85 c lt1007/lt1037am, m (obsolete) C55 c to 125 c lt1007acj8 lt1007amj8 lt1007cj8 lt1007mj8 lt1037acj8 lt1037amj8 lt1037cj8 lt1037mj8 t jmax = 150 c, q ja = 100 c/ w (j8) j8 package lead cerdip obsolete package obsolete package electrical characteristics v s = 15v, t a = 25 c, unless otherwise noted. lt1007ac/am lt1007c/i/m lt1037ac/am lt1037c/i/m symbol parameter conditions min typ max min typ max units v os input offset voltage (note 2) 10 25 20 60 m v d v os long term input offset (notes 3, 4) 0.2 1.0 0.2 1.0 m v/mo d time voltage stability i os input offset current 7 30 12 50 na i b input bias current 10 35 15 55 na e n input noise voltage 0.1hz to 10hz (notes 4, 6) 0.06 0.13 0.06 0.13 m v p-p input noise voltage density f o = 10hz (notes 4, 5) 2.8 4.5 2.8 4.5 nv/ ? hz f o = 1000hz (note 4) 2.5 3.8 2.5 3.8 nv/ ? hz i n input noise current density f o = 10hz (notes 4, 7) 1.5 4.0 1.5 4.0 pa/ ? hz f o = 1000hz (notes 4, 7) 0.4 0.6 0.4 0.6 pa/ ? hz consider the n8 package for alternate source consider the n8 or s8 package for alternate source
3 lt1007/lt1037 100737fb electrical characteristics v s = 15v, t a = 25 c, unless otherwise noted. lt1007ac/am lt1007c/i/m lt1037ac/am lt1037c/i/m symbol parameter conditions min typ max min typ max units input resistance, common mode 7 5 g w input voltage range 11.0 12.5 11.0 12.5 v cmrr common mode rejection ratio v cm = 11v 117 130 110 126 db psrr power supply rejection ratio v s = 4v to 18v 110 130 106 126 db a vol large-signal voltage gain r l 3 2k, v o = 12v 7.0 20.0 5.0 20.0 v/ m v r l 3 1k, v o = 10v 5.0 16.0 3.5 16.0 v/ m v r l 3 600 w , v o = 10v 3.0 12.0 2.0 12.0 v/ m v v out maximum output voltage swing r l 3 2k 13.0 13.8 12.5 13.5 v r l 3 600 w 11.0 12.5 10.5 12.5 v sr slew rate lt1007 r l 3 2k 1.7 2.5 1.7 2.5 v/ m s lt1037 a vcl 3 5 1115 1115 v/ m s gbw gain bandwidth lt1007 f o = 100khz (note 8) 5.0 8.0 5.0 8.0 mhz product lt1037 f o = 10khz (note 8) (a vcl 3 5) 45 60 45 60 mhz z o open-loop output resistance v o = 0v, i o = 0 70 70 w p d power dissipation lt1007 80 120 80 140 mw lt1037 80 130 85 140 mw lt1007ac lt1007c lt1037ac lt1037c symbol parameter conditions min typ max min typ max units v os input offset voltage (note 2) l 20 50 35 110 m v d v os average input offset drift (note 10) l 0.2 0.6 0.3 1.0 m v/ c d temp i os input offset current l 10 40 15 70 na i b input bias current l 14 45 20 75 na input voltage range l 10.5 11.8 10.5 11.8 v cmrr common mode rejection ratio v cm = 10.5v l 114 126 106 120 db psrr power supply rejection ratio v s = 4.5v to 18v l 106 126 102 120 db a vol large-signal voltage gain r l 3 2k, v o = 10v l 4.0 18.0 2.5 18.0 v/ m v r l 3 1k, v o = 10v l 2.5 14.0 2.0 14.0 v/ m v v out maximum output voltage swing r l 3 2k l 12.5 13.6 12.0 13.6 v p d power dissipation l 90 144 90 160 mw the l denotes the specifications which apply over the temperature range 0 c t a 70 c, v s = 15v, unless otherwise noted.
4 lt1007/lt1037 100737fb the l denotes the specifications which apply over the temperature range C 40 c t a 85 c, v s = 15v, unless otherwise noted. electrical characteristics for mil-std components, please refer to ltc 883c data sheet for test listing and parameters. note 1: absolute maximum ratings are those values beyond which the life of a device may be impaired. note 2: input offset voltage measurements are performed by automatic test equipment approximately 0.5 seconds after application of power. am and ac grades are guaranteed fully warmed up. note 3: long term input offset voltage stability refers to the average trend line of offset voltage vs time over extended periods after the first 30 days of operation. excluding the initial hour of operation, changes in v os during the first 30 days are typically 2.5 m v. refer to typical performance curve. note 4: this parameter is tested on a sample basis only. note 5: 10hz noise voltage density is sample tested on every lot. devices 100% tested at 10hz are available on request. note 6: see the test circuit and frequency response curve for 0.1hz to 10hz tester in the applications information section. note 7: see the test circuit for current noise measurement in the applications information section. note 8: this parameter is guaranteed by design and is not tested. note 9: the inputs are protected by back-to-back diodes. current limiting resistors are not used in order to achieve low noise. if differential input voltage exceeds 0.7v, the input current should be limited to 25ma. note 10: the average input offset drift performance is within the specifications unnulled or when nulled with a pot having a range of 8k w to 20k w . the l denotes the specifications which apply over the temperature range C 55 c t a 125 c, v s = 15v, unless otherwise noted. lt1007i/lt1037i symbol parameter conditions min typ max units v os input offset voltage (note 2) l 40 125 m v d v os average input offset drift (note 10) l 0.3 1.0 m v/ c d temp i os input offset current l 20 80 na i b input bias current l 25 90 na input voltage range l 10 11.7 v cmrr common mode rejection ratio v cm = 10.5v l 105 120 db psrr power supply rejection ratio v s = 4.5v to 18v l 101 120 db a vol large-signal voltage gain r l 3 2k, v o = 10v l 2.0 15.0 v/ m v r l 3 1k, v o = 10v l 1.5 12.0 v/ m v v out maximum output voltage swing r l 3 2k l 12.0 13.6 v p d power dissipation l 95 165 mw lt1007am/lt1037am lt1007m/lt1037m symbol parameter conditions min typ max min typ max units v os input offset voltage (note 2) l 25 60 50 160 m v d v os average input offset drift (note 10) l 0.2 0.6 0.3 1.0 m v/ c d temp i os input offset current l 15 50 20 85 na i b input bias current l 20 60 35 95 na input voltage range l 10.3 11.5 10.3 11.5 v cmrr common mode rejection ratio v cm = 10.3v l 112 126 104 120 db psrr power supply rejection ratio v s = 4.5v to 18v l 104 126 100 120 db a vol large-signal voltage gain r l 3 2k, v o = 10v l 3.0 14.0 2.0 14.0 v/ m v r l 3 1k, v o = 10v l 2.0 10.0 1.5 10.0 v/ m v v out maximum output voltage swing r l 3 2k l 12.5 13.5 12.0 13.5 v p d power dissipation l 100 150 100 170 mw
5 lt1007/lt1037 100737fb typical perfor m a n ce characteristics u w voltage noise density (nv/ hz) 0 number of units 140 120 100 80 60 40 20 0 1 5 7 1007/37 g01 4 9 10 2 3 68 v s = 15v t a = 25 c 497 units measured from six runs frequency (hz) 1 1 3 rms voltage noise density (nv/ hz) 10 30 100 10 1000 1007/37 g02 0.1 100 v s = 15v t a = 25 c 1/f corner = 2hz maximum typical voltage noise vs frequency 0.01hz to 1hz peak-to-peak noise time (sec) 0204060 80 100 voltage noise (20nv/div) 1007/37 g04 frequency (hz) 10 0.1 0.3 3 1 10 100 1k 10k 1007/37 g07 rms noise density (pa/ hz) 1/f corner = 120hz maximum typical temperature ( c) ?0 5 4 3 2 1 0 0 50 75 1007/37 g06 ?5 25 100 125 at 10hz v s = 15v at 1khz rms voltage noise density (nv/ hz) 10hz voltage noise distribution total noise vs source resistance voltage noise vs temperature source resistance (k w ) 0.1 1 10 100 1000 1 10 100 1007/37 g05 total noise density (nv/ hz) v s = 15v t a = 25 c source resistance = 2r r r at 1khz at 10hz resistor noise only current noise vs frequency bandwidth (khz) 0.1 0.01 rms voltage noise ( m v) 0.1 1 10 1 10 100 1007/37 g08 wideband voltage noise (0.1hz to frequency indicated) supply voltage ( v) 0 5 4 3 2 1 0 20 1007/37 g09 5 10 15 25 rms voltage noise density (nv/ hz) at 10hz t a = 25 c at 1khz voltage noise vs supply voltage 0.02hz to 10hz rms noise. gain = 50,000 (measured on hp3582 spectrum analyzer) marker at 2hz ( = 1/f corner) = 179 m v/ ? hz 50,000 nv ? hz = 3.59 1007/37 g03
6 lt1007/lt1037 100737fb typical perfor m a n ce characteristics u w frequency (hz) 0.01 voltage gain (db) 180 160 140 120 100 80 60 40 20 0 ?0 1007/37 g10 0.1 1 10 100 1k 10k 100k 1m 10m 100m v s = 15v t a = 25 c r l = 2k lt1037 lt1007 voltage gain, r l = 2k and 600 w supply voltage ( v) 0 open-loop voltage gain (v/ m v) 25 20 15 10 5 0 20 1007/37 g11 5 10 15 25 t a = 25 c r l = 2k r l = 600 w time after power on (minutes) 0 change in offset voltage ( m v) 10 8 6 4 2 0 4 1007/37 g15 1 2 3 5 v s = 15v t a = 25 c dual-in-line package plastic (n8) or cerdip (j8) metal can (h) package voltage gain vs frequency voltage gain vs supply voltage voltage gain vs load resistance load resistance (k w ) 0.1 0.3 3 open-loop voltage gain (v/ m v) 25 20 15 10 5 0 110 1007/37 g13 v s = 15v t a = 25 c warm-up drift temperature ( c) voltage gain (v/ m v) ?0 25 20 15 10 5 0 0 50 75 1007/37 g14 ?5 25 100 125 r l = 2k r l = 1k r l = 600 w v s = 15v v out = 10v v out = 8v for t a 3 100 c and r l = 600 w voltage gain vs temperature time (months) 0 offset voltage change ( m v) 10 5 0 ? ?0 8 1007/37 g16 2 4 6 10 0.2 m v/month 0.2 m v/month trend line long term stability of four representative units supply voltage ( v) 0 supply current (ma) 20 1007/37 g18 5 10 15 4 3 2 1 0 125 c 25 c ?5 c supply current vs supply voltage offset voltage drift with temperature of representative units temperature ( c) ?0 offset voltage ( m v) 50 40 30 20 10 0 ?0 ?0 ?0 ?0 ?0 0 50 75 1007/37 g17 ?5 25 100 125 v s = 15v lt1007a/lt1037a lt1007/lt1037 ? 0 1 ? 0 1 v s = 15v t a = 25 c input voltage ( m v) input voltage ( m v) 15 10 5 0 5 10 15 output voltage (v) measured on tektronix 178 linear ic tester 1007/37 g12 r l = 2k r l = 600 w
7 lt1007/lt1037 100737fb typical perfor m a n ce characteristics u w frequency (hz) common mode rejection ratio (db) 140 120 100 80 60 40 10 3 10 5 10 6 10 7 1007/37 g19 10 4 v s = 15v v cm = 10v t a = 25 c lt1037 lt1007 common mode rejection vs frequency input bias current vs temperature temperature ( c) ?0 input bias current (na) 1007/37 g22 0 50 100 50 40 30 20 10 0 ?5 25 75 125 v s = 15v lt1007m lt1037m lt1007am lt1037am time from output short to ground (minutes) 0 short-circuit current (ma) sourcing sinking 50 40 30 20 10 0 ?0 ?0 ?0 ?0 ?0 1 2 1007/37 g27 3 ?5 c ?5 c 125 c 125 c 25 c 25 c v s = 15v output short-circuit current vs time load resistance ( w ) 100 300 3k output swing (v) 15 12 9 6 3 0 1k 10k 1007/37 g24 v s = 15v t a = 25 c positive swing negative swing output swing vs load resistance common mode input voltage (v) ?5 10 input bias current (na) ? 5 0 10 15 1007/37 g21 20 15 10 5 0 ? ?0 ?5 ?0 device with negative input current device with positive input current v s = 15v t a = 25 c r cm = ? 7g 20v 3na input bias current over the common mode range temperature ( c) ?0 common mode limit (v) referred to power supply v + ? ? ? ? +4 +3 +2 +1 v 0 50 75 1007/37 g20 ?5 25 100 125 v + = 3v to 20v v = 3v to 20v common mode limit vs temperature temperature ( c) ?5 input offset current (na) ?0 0 25 ?5 50 75 100 125 1007/37 g23 60 50 40 30 20 10 0 v s = 15v lt1007m lt1037m lt1007am lt1037am input offset current vs temperature closed-loop output impedance frequency (hz) 10 output impedance ( w ) 100 10 1 0.1 0.01 0.001 100k 1007/37 g26 100 1k 10k 1m v s = 15v t a = 25 c i out = 1ma a v = 1000 a v = 1000 a v = 1 a v = 5 lt1007 lt1037 frequency (hz) 1 power supply rejection ratio (db) 1195 g25 10 2 10 10 3 10 4 10 5 10 6 10 7 10 8 160 140 120 100 80 60 40 20 0 t a = 25 c negative supply positive supply psrr vs frequency
8 lt1007/lt1037 100737fb typical perfor m a n ce characteristics u w temperature ( c) ?0 slew rate (v/ m s) phase margin (deg) gain bandwidth procuct, f o = 10khz (mhz) 70 60 50 20 15 10 70 60 50 0 50 75 1007/37 g30 ?5 25 100 125 slew gbw v s = 15v c l = 100pf phase margin 50mv 0v C 50mv a vcl = 5 v s = 15v c l = 15pf 1007/37 g28 lt1037 small-signal transient response lt1037 phase margin, gain bandwidth product, slew rate vs temperature 10v 0v C 10v a vcl = 5 v s = 15v 1007/37 g29 lt1037 large-signal response frequency (mhz) 0.1 voltage gain (db) 40 30 20 10 0 ?0 phase shift (deg) 90 100 110 120 130 140 150 160 170 180 190 1 10 100 1007/37 g32 v s = 15v t a = 25 c c l = 100pf gain phase temperature ( c) ?0 slew rate (v/ m s) phase margin (deg) gain bandwidth procuct, f o = 100khz (mhz) 70 60 50 3 2 1 9 8 7 0 50 75 1007/37 g33 ?5 25 100 125 slew gbw v s = 15v c l = 100pf phase margin frequency (mhz) 0.1 voltage gain (db) 50 40 30 20 10 0 phase shift (deg) 90 100 110 120 130 140 150 160 170 180 190 1 10 100 1007/37 g31 a v = 5 v s = 15v t a = 25 c c l = 100pf gain phase lt1037 gain, phase shift vs frequency lt1007 gain, phase shift vs frequency 50mv 0v C 50mv a vcl = 1 v s = 15v c l = 15pf 1007/37 g34 frequency (hz) 28 24 20 16 12 8 4 0 1k 100k 1m 10m 1007/37 g36 10k peak-to-peak output voltage (v) v s = 15v t a = 25 c lt1037 lt1007 maximum undistorted output vs frequency 5v 0v C5v a vcl = C 1 v s = 15v 1007/37 g35 lt1007 small-signal transient response lt1007 large-signal response lt1007 phase margin, gain bandwidth product, slew rate vs temperature
9 lt1007/lt1037 100737fb applicatio n s i n for m atio n wu u u general the lt1007/lt1037 series devices may be inserted directly into op-07, op-27, op-37 and 5534 sockets with or without removal of external compensation or nulling components. in addition, the lt1007/lt1037 may be fitted to 741 sockets with the removal or modification of external nulling components. offset voltage adjustment the input offset voltage of the lt1007/lt1037 and its drift with temperature, are permanently trimmed at wafer testing to a low level. however, if further adjustment of v os is necessary, the use of a 10k w nulling potentiometer will not degrade drift with temperature. trimming to a value other than zero creates a drift of (v os / 300) m v/ c, e.g., if v os is adjusted to 300 m v, the change in drift will be 1 m v/ c (figure 1). the adjustment range with a 10k w pot is approximately 2.5mv. if less adjustment range is needed, the sensitivity and resolution of the nulling can be improved by using a smaller pot in conjunction with fixed resistors. the ex- ample has an approximate null range of 200 m v (figure 2). offset voltage and drift thermocouple effects, caused by temperature gradients across dissimilar metals at the contacts to the input terminals, can exceed the inherent drift of the amplifier unless proper care is exercised. 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 to measure offset voltage is also used as the burn-in configuration for the lt1007/lt1037, with the supply voltages increased to 20v (figure 3). figure 2. improved sensitivity adjustment 1007/37 f02 1k 4.7k output 8 7 6 4 1 2 3 15v 15v + lt1007 lt1037 4.7k 1007/37 f01 10k output input 8 7 6 4 1 2 3 15v 15v + lt1007 lt1037 figure 1. standard adjustment unity-gain buffer application (lt1007 only) when r f 100 w and the input is driven with a fast, large- signal pulse (>1v), the output waveform will look as shown in the pulsed operation diagram (figure 4). 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 3 500 w , 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. 1007/37 f04 lt1007 + r f output 2.8v/ m s figure 4. pulsed operation 1007/37 f03 v out v out = 1000v os *resistors must have low thermoelectric potential 7 6 4 2 3 15v 15v + lt1007 lt1037 50k* 100 w * 50k* figure 3. test circuit for offset voltage and offset voltage drift with temperature
10 lt1007/lt1037 100737fb applicatio n s i n for m atio n wu u u as with all operational amplifiers when r f > 2k, a pole will be created with r f and the amplifiers input capacitance, creating additional phase shift and reducing the phase margin. a small capacitor (20pf to 50pf) in parallel with r f will eliminate this problem. noise testing the 0.1hz to 10hz peak-to-peak noise of the lt1007/ lt1037 is measured in the test circuit shown (figure 5a). the frequency response of this noise tester (figure 5b) indicates that the 0.1hz corner is defined by only one zero. the test time to measure 0.1hz to 10hz noise should not exceed ten seconds, as this time limit acts as an additional zero to eliminate noise contributions from the frequency band below 0.1hz. measuring the typical 60nv peak-to-peak noise perfor- mance of the lt1007/lt1037 requires special test precautions: 1. the device should be warmed up for at least five minutes. as the op amp warms up, its offset voltage changes typically 3 m v due to its chip temperature increasing 10 c to 20 c from the moment the power supplies are turned on. in the ten-second measurement interval these temperature-induced effects can easily exceed tens of nanovolts. 2. for similar reasons, the device must be well shielded from air currents to eliminate the possibility of thermo- electric effects in excess of a few nanovolts, which would invalidate the measurements. 3. sudden motion in the vicinity of the device can also feedthrough to increase the observed noise. a noise voltage density test is recommended when mea- suring noise on a large number of units. a 10hz noise voltage density measurement will correlate well with a 0.1hz to 10hz peak-to-peak noise reading since both results are determined by the white noise and the location of the 1/f corner frequency. current noise is measured in the circuit shown in figure 6 and calculated by the following formula: i e nv m n no = () - () ? ? ()() 2 2 12 130 101 1 101 / w frequency (hz) 100 90 80 70 60 50 40 30 0.01 1 10 100 1007/37f05b 0.1 gain (db) 1007/37 f05a 10 w 0.1 m f 4.7 m f voltage gain = 50,000 24.3k 100k + + * lt1007 lt1037 lt1001 2k 4.3k 110k 100k scope 1 r in = 1m *device under test note: all capacitor values are for nonpolarized capacitors only 2.2 m f 0.1 m f 22 m f figure 5a. 0.1hz to 10hz noise test circuit 1007/37 f06 100 w 100k + lt1007 lt1037 500k 500k e no figure 6 figure 5b. 0.1hz to 10hz peak-to- peak noise tester frequency response
11 lt1007/lt1037 100737fb the lt1007/lt1037 achieve their low noise, in part, by operating the input stage at 120 m a versus the typical 10 m a of most other op amps. voltage noise is inversely propor- tional while current noise is directly proportional to the square root of the input stage current. therefore, the lt1007/lt1037s current noise will be relatively high. at low frequencies, the low 1/f current noise corner fre- quency ( ? 120hz) minimizes current noise to some extent. in most practical applications, however, current noise will not limit system performance. this is illustrated in the total noise vs source resistance plot in the typical performance characteristics section, where: total noise = [(voltage noise) 2 + (current noise ? r s ) 2 + (resistor noise) 2 ] 1/2 three regions can be identified as a function of source resistance: (i) r s 400 w . voltage noise dominates (ii) 400 w r s 50k at 1khz 400 w r s 8k at 10hz (iii) r s > 50k at 1khz r s > 8k at 10hz clearly the lt1007/lt1037 should not be used in region (iii), where total system noise is at least six times higher than the voltage noise of the op amp, i.e., the low voltage noise specification is completely wasted. typical applicatio n s u 1007/37 ta03 365 w 1% 15k 5% 20k trim + lt1037 2 15v 15v input 3 7 6 4 output rn60c film resistors 340k 1% the high gain and wide bandwidth of the lt1037 (and lt1007) is useful in low frequency, 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 lt1037? ?ain precision-bandwidth product?is 200 times higher as shown. frequency (hz) 0.1 0.001 gain error (%) 0.01 0.1 1 1 10 100 typical precision op amp lt1007 lt1037 gain error = closed-loop gain open-loop gain gain 1000 amplifier with 0.01% accuracy, dc to 5hz gain error vs frequency closed-loop gain = 1000 } resistor noise dominates } current noise dominates applicatio n s i n for m atio n wu u u
12 lt1007/lt1037 100737fb typical applicatio n s u infrared detector preamplifier 1007/37 ta08 ir radiation optical chopper + lt1007 50ma 15v 6 4 7 3 2 output to demodulator synchronous chopped detector output photoconductive infrared detector hgcdte type infra-red associates, inc. 100 m f 392k* 15v 15v + + 100 m f 10 m f + 392 w * 392 w * 267 w * 2n2219a 33 w 10 w 1k + 100 m f 13 w at 77 k *1% metal film precision amplifier drives 300 w load to 10v 1007/37 ta05 365 w 1% 20k 5% 10k trim + lt1037 + lt1007 2 input 3 2 3 6 6 output 10v 15 w 5% 15 w 5% r l 300 w 340k 1% the addition of the lt1007 doubles the amplifier? output drive to 33ma. gain accuracy is 0.02%, slightly degraded compared to above because of self-heating of the lt1037 under load. microvolt comparator with hysteresis 1007/37 ta04 output positive feedback to one of the nulling terminals creates approximately 5 m v of hysteresis. output can sink 16ma. input offset voltage is typically changed less than 5 m v due to the feedback. 7 8 6 4 2 3 input 15v 15v + lt1007 100m 5% 365 w 1% 15k 1%
13 lt1007/lt1037 100737fb typical applicatio n s u phono preamplifier 1007/37 ta06 100 w + lt1037 mag phono input 7 6 4 3 2 7.87k 15v 15v output all resistors metal film 0.01 m f 0.033 m f 100pf 47k 100k tape head amplifier 1007/37 ta07 100 w + lt1037 tape head input 6 3 2 output all resistors metal film 0.01 m f 4.99k 316k si plified sche atic w w q1a q10 q6 q4 q2b q15 q2a q1b inverting input (? c1 = 110pf for lt1007 c1 = 12pf for lt1037 noninverting input (+) 3 1 8 7 6 v v v + v + 4 v 1007/37 sd v + output q8 3.4k 3.4k 17k 17k 1.2k 750 w 20 w 20 w 200 w 50 w 200 w 200 w 6k 6k 80pf 20pf c1 1.2k q20 130pf q17 q18 q25 q24 q23 q16 q12 q22 q30 q28 q26 q29 q27 450 m a 240 m a 500 m a 120 m a 240 m a 750 m a q19 q11 q13 q7 2 q3 q5 q9
14 lt1007/lt1037 100737fb package descriptio n u h package 8-lead to-5 metal can (.200 inch pcd) (reference ltc dwg # 05-08-1320) j8 package 8-lead cerdip (narrow .300 inch, hermetic) (reference ltc dwg # 05-08-1110) 45 typ 0.050 (1.270) max 0.016 ?0.021** (0.406 ?0.533) 0.010 ?0.045* (0.254 ?1.143) seating plane 0.040 (1.016) max 0.165 ?0.185 (4.191 ?4.699) gauge plane reference plane 0.500 ?0.750 (12.700 ?19.050) 0.305 ?0.335 (7.747 ?8.509) 0.335 ?0.370 (8.509 ?9.398) dia 0.200 (5.080) typ 0.027 ?0.045 (0.686 ?1.143) 0.027 ?0.034 (0.686 ?0.864) 0.110 ?0.160 (2.794 ?4.064) insulating standoff h8(to-5) 0.200 pcd 0595 lead diameter is uncontrolled between the reference plane and 0.045" below the reference plane for solder dip lead finish, lead diameter is 0.016 ?0.024 (0.406 ?0.610) * ** j8 1298 0.014 ?0.026 (0.360 ?0.660) 0.200 (5.080) max 0.015 ?0.060 (0.381 ?1.524) 0.125 3.175 min 0.100 (2.54) bsc 0.300 bsc (0.762 bsc) 0.008 ?0.018 (0.203 ?0.457) 0 ?15 0.005 (0.127) min 0.405 (10.287) max 0.220 ?0.310 (5.588 ?7.874) 12 3 4 87 65 0.025 (0.635) rad typ 0.045 ?0.068 (1.143 ?1.727) full lead option 0.023 ?0.045 (0.584 ?1.143) half lead option corner leads option (4 plcs) 0.045 ?0.065 (1.143 ?1.651) note: lead dimensions apply to solder dip/plate or tin plate leads obsolete packages
15 lt1007/lt1037 100737fb 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. package descriptio n u n8 package 8-lead pdip (narrow .300 inch) (reference ltc dwg # 05-08-1510) s8 package 8-lead plastic small outline (narrow .150 inch) (reference ltc dwg # 05-08-1610) 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) 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 * **
16 lt1007/lt1037 100737fb lt/cpi 1101 1.5k rev b ? printed in usa ? linear technology corporation 1985 strain gauge signal conditioner with bridge excitation 6 4 7 3 2 7.5v 7.5v 7.5v 6 4 7 7.5v 1007/37 ta09 + lt1007 + lt1007 6 4 7 3 3 2 2 350 w bridge output 0v to 10v 301k* 301k* gain trim 50k zero trim 10k reference out 1 m f 15v 15v 499 w * 5k 2.5v lt1009 + lt1007 *rn60c film resistor the lt1007 is capable of providing excitation current directly to bias the 350 w 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 lt1007 can amplify the reduced signal accurately. related parts part number description comments lt1028 ultralow noise precision op amp lowest noise 0.85nv/ ? hz lt1115 ultralow noise, low distortion audio op amp 0.002% thd, max noise 1.2mv/ ? hz lt1124/lt1125 dual/quad low noise, high speed precision op amps similar to lt1007 lt1126/lt1127 dual/quad decompensated low noise, high speed precision op amps similar to lt1037 lt1498/lt1499 10mhz, 5v/ m s, dual/quad rail-to-rail input and output precision c-load tm op amps c-load is a trademark of linear technology corporation. u typical applicatio linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 l fax: (408) 434-0507 l www.linear.com

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