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lt6013/lt6014 1 60134fb , ltc and lt are registered trademarks of linear technology corporation. all other trademarks are the property of their respective owners. single/dual 145 a, 9.5nv/ hz, a v 5, rail-to-rail output precision op amps applicatio s u features typical applicatio u descriptio u thermocouple amplifiers precision photodiode amplifiers instrumentation amplifiers battery-powered precision systems low-voltage precision systems micro-power sensor interface 35 v maximum offset voltage (lt6013a) low 1/f noise: 200nv p-p (0.1hz to 10hz) 40nv rms (0.1hz to 10hz) low white noise: 9.5nv/ hz (1khz) rail-to-rail output swing 145 a supply current per amplifier 250pa maximum input bias current (lt6013a) a v 5 stable; up to 500pf c load 0.2v/ s slew rate 1.4mhz gain bandwidth product 120db minimum voltage gain, v s = 15v 0.8 v/ c maximum v os drift 2.7v to 18v supply voltage operation operating temperature range: 40 c to 85 c available in so-8 and space saving 3mm 3mm dfn packages the lt 6013 and lt6014 op amps combine low noise and high precision input performance with low power con- sumption and rail-to-rail output swing. the amplifiers are stable in a gain of 5 or more and feature greatly improved cmrr and psrr versus frequency compared to other precision op amps. input offset voltage is factory-trimmed to less than 35 v. the low drift and excellent long-term stability ensure a high accuracy over temperature and time. the 250pa maximum input bias current and 120db minimum voltage gain further maintain this precision over operating conditions. the lt6013 and lt6014 operate from any supply voltage from 2.7v to 36v and draw only 145 a of supply current per amplifier on a 5v supply. the output swings to within 40mv of either supply rail, making the amplifiers very useful for low voltage single supply operation. the amplifiers are fully specified at 5v and 15v supplies and from ?0 c to 85 c. the single lt6013 and dual lt6014 are both available in so-8 and space saving 3mm 3mm dfn packages. for unity gain stable ver- sions, refer to the lt6010 and lt6011 data sheets. gain of 10 single ended to differential converter + 1/2 lt6014 v + v 8.06k 2k v in 5 ?v in 60134 ta01a + 1/2 lt6014 10k 2k ? ?v in lt6013/lt6014 0.1hz to 10hz voltage noise time (sec) 0 input voltage noise (0.1 v/div) 8 60134 ta01b 246 10 7 135 9 v s = 5v, 0v t a = 25 c equivalent rms voltage = 40nv rms
lt6013/lt6014 2 60134fb 1 2 3 4 8 7 6 5 top view *dnc v + out nc *dnc ?n +in v s8 package 8-lead plastic so + top view dd package 8-lead (3mm 3mm) plastic dfn 5 6 7 8 4 3 2 1 *dnc ?n +in v *dnc v + out nc + total supply voltage (v + to v ) .............................. 40v differential input voltage (note 2) .......................... 10v input voltage .................................................... v + to v input current (note 2) ....................................... 10ma output short-circuit duration (note 3) ........... indefinite operating temperature range (note 4) .. 40 c to 85 c specified temperature range (note 5) ... 40 c to 85 c order part number dd part marking* t jmax = 125 c, ja = 160 c/w underside metal connected to v (pcb connection optional) lt6013cdd lt6013idd lt6013acdd lt6013aidd (note 1) absolute axi u rati gs w ww u package/order i for atio uu w order part number s8 part marking lt6013cs8 lt6013is8 lt6013acs8 lt6013ais8 6013 6013i 6013a 6013ai t jmax = 150 c, ja = 190 c/w maximum junction temperature dd package ..................................................... 125 c s8 package ...................................................... 150 c storage temperature range dd package ..................................... 65 c to 125 c s8 package ...................................... 65 c to 150 c lead temperature (soldering, 10 sec).................. 300 c lbhc order part number dd part marking* t jmax = 125 c, ja = 160 c/w underside metal connected to v (pcb connection optional) lt6014cdd lt6014idd lt6014acdd lt6014aidd top view dd package 8-lead (3mm 3mm) plastic dfn 5 6 7 8 4 3 2 1 out a ?n a +in a v v + out b ?n b +in b b a order part number s8 part marking lt6014cs8 lt6014is8 lt6014acs8 lt6014ais8 6014 6014i 6014a 6014ai t jmax = 150 c, ja = 190 c/w 1 2 3 4 8 7 6 5 top view v + out b in b +in b out a in a +in a v s8 package 8-lead plastic so b a lbcb *temperature and electrical grades are identified by a label on the shipping container. consult ltc marketing for parts specified with wider operating temperature ranges. *do not connect *do not connect
lt6013/lt6014 3 60134fb the denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c. v s = 5v, 0v; v cm = 2.5v; r l to 0v; unless otherwise specified. (note 5) electrical characteristics symbol parameter conditions min typ max units v os input offset voltage (note 8) lt6013as8 10 35 v t a = 0 c to 70 c 60 v t a = ?0 c to 85 c 75 v lt6013s8, lt6014as8 20 60 v t a = 0 c to 70 c 85 v t a = ?0 c to 85 c 110 v lt6013add 20 60 v t a = 0 c to 70 c 110 v t a = ?0 c to 85 c 150 v lt6014s8 20 75 v t a = 0 c to 70 c 100 v t a = ?0 c to 85 c 125 v lt6013dd, lt6014add 30 85 v t a = 0 c to 70 c 135 v t a = ?0 c to 85 c 170 v lt6014dd 30 125 v t a = 0 c to 70 c 175 v t a = ?0 c to 85 c 210 v ? v os / ? t input offset voltage drift (note 6) s8 packages 0.2 0.8 v/ c dd packages 0.2 1.4 v/ c i os input offset current (note 8) lt6013as8, lt6013add 100 250 pa t a = 0 c to 70 c 500 pa t a = ?0 c to 85 c 600 pa lt6014as8, lt6014add 100 500 pa t a = 0 c to 70 c 600 pa t a = ?0 c to 85 c 700 pa lt6013/lt6014 (standard grades) 150 800 pa t a = 0 c to 70 c 1000 pa t a = ?0 c to 85 c 1200 pa i b input bias current (note 8) lt6013as8, lt6013add 100 250 pa t a = 0 c to 70 c 500 pa t a = ?0 c to 85 c 600 pa lt6013s8, lt6013dd, lt6014as8, lt6014add 100 400 pa t a = 0 c to 70 c 600 pa t a = ?0 c to 85 c 800 pa lt6014s8, lt6014dd 150 800 pa t a = 0 c to 70 c 1000 pa t a = ?0 c to 85 c 1200 pa e n input noise voltage density f = 1khz, lt6013/lt6014 9.5 nv/ hz f = 1khz, lt6013a/lt6014a 9.5 13 nv/ hz input noise voltage (low frequency) bandwidth = 0.01hz to 1hz 200 nv p-p 50 nv rms bandwidth = 0.1hz to 10hz 200 nv p-p 40 nv rms
lt6013/lt6014 4 60134fb i n input noise current density f = 1khz 0.15 pa/ hz input noise current (low frequency) bandwidth = 0.01hz to 1hz 7 pa p-p 1.3 pa rms bandwidth = 0.1hz to 10hz 5 pa p-p 0.4 pa rms r in input resistance common mode, v cm = 1v to 3.8v 120 g ? differential 20 m ? c in input capacitance 4pf v cm input voltage range (positive) guaranteed by cmrr 3.8 4 v input voltage range (negative) guaranteed by cmrr 0.7 1 v cmrr common mode rejection ratio v cm = 1v to 3.8v 107 135 db minimum supply voltage guaranteed by psrr 2.4 2.7 v psrr power supply rejection ratio v s = 2.7v to 36v, v cm = 1/2v s 112 135 db a vol large-signal voltage gain r l = 10k, v out = 1v to 4v 300 2000 v/mv r l = 2k, v out = 1v to 4v 250 2000 v/mv channel separation v out = 1v to 4v, lt6014 110 140 db v out maximum output swing no load, 50mv overdrive 35 55 mv (positive, referred to v + ) 65 mv i source = 1ma, 50mv overdrive 120 170 mv 220 mv maximum output swing no load, 50mv overdrive 40 55 mv (negative, referred to 0v) 65 mv i sink = 1ma, 50mv overdrive 150 225 mv 275 mv i sc output short-circuit current (note 3) v out = 0v, 1v overdrive, source 8 14 ma 4ma v out = 5v, 1v overdrive, sink 8 21 ma 4ma sr slew rate a v = ?0, r f = 50k, r g = 5k 0.15 0.2 v/ s t a = 0 c to 70 c 0.12 v/ s t a = 40 c to 85 c 0.1 v/ s gbw gain bandwidth product f = 10khz 1 1.4 mhz 0.9 mhz t s settling time a v = ?, 0.01%, v out = 1.5v to 3.5v 20 s t r , t f rise time, fall time a v = 5, 10% to 90%, 0.1v step 1 s the denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c. v s = 5v, 0v; v cm = 2.5v; r l to 0v; unless otherwise specified. (note 5) electrical characteristics symbol parameter conditions min typ max units
lt6013/lt6014 5 60134fb symbol parameter conditions min typ max units v os input offset voltage (note 8) lt6013as8 20 60 v t a = 0 c to 70 c 80 v t a = ?0 c to 85 c 110 v lt6013s8 25 85 v t a = 0 c to 70 c 110 v t a = ?0 c to 85 c 135 v lt6013add 25 85 v t a = 0 c to 70 c 135 v t a = ?0 c to 85 c 170 v lt6013dd, lt6014as8 30 135 v t a = 0 c to 70 c 160 v t a = ?0 c to 85 c 185 v lt6014s8 35 150 v t a = 0 c to 70 c 175 v t a = ?0 c to 85 c 200 v lt6014add 35 160 v t a = 0 c to 70 c 210 v t a = ?0 c to 85 c 225 v lt6014dd 40 200 v t a = 0 c to 70 c 250 v t a = ?0 c to 85 c 275 v the denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c. v s = 5v, 0v; v cm = 2.5v; r l to 0v; unless otherwise specified. (note 5) electrical characteristics symbol parameter conditions min typ max units ? v os offset voltage match (note 7) lt6014as8 50 120 v t a = 0 c to 70 c 170 v t a = 40 c to 85 c 220 v lt6014add 50 170 v t a = 0 c to 70 c 270 v t a = 40 c to 85 c 340 v lt6014s8 50 150 v t a = 0 c to 70 c 200 v t a = 40 c to 85 c 250 v lt6014dd 60 250 v t a = 0 c to 70 c 350 v t a = 40 c to 85 c 420 v ? i b input bias current match (note 7) lt6014as8, lt6014add 200 800 pa t a = 0 c to 70 c 1200 pa t a = 40 c to 85 c 1400 pa lt6014s8, lt6014dd 300 1600 pa t a = 0 c to 70 c 2000 pa t a = 40 c to 85 c 2400 pa ? cmrr common mode rejection ratio lt6014 101 135 db match (note 7) ? psrr power supply rejection ratio lt6014 106 135 db match (note 7) i s supply current per amplifier 145 165 a t a = 0 c to 70 c 210 a t a = 40 c to 85 c 230 a the denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c. v s = 15v, v cm = 0v, r l to 0v, unless otherwise specified. (note 5)
lt6013/lt6014 6 60134fb ? v os / ? t input offset voltage drift (note 6) s8 packages 0.2 0.8 v/ c dd packages 0.2 1.2 v/ c i os input offset current (note 8) lt6013as8, lt6013add 100 250 pa t a = 0 c to 70 c 500 pa t a = ?0 c to 85 c 600 pa lt6014as8, lt6014add 100 500 pa t a = 0 c to 70 c 600 pa t a = ?0 c to 85 c 700 pa lt6013/lt6014 (standard grades) 150 800 pa t a = 0 c to 70 c 1000 pa t a = ?0 c to 85 c 1200 pa i b input bias current (note 8) lt6013as8, lt6013add 100 250 pa t a = 0 c to 70 c 500 pa t a = ?0 c to 85 c 600 pa lt6013s8, lt6013dd, lt6014as8, lt6014add 100 400 pa t a = 0 c to 70 c 600 pa t a = ?0 c to 85 c 800 pa lt6014s8, lt6014dd 150 800 pa t a = 0 c to 70 c 1000 pa t a = ?0 c to 85 c 1200 pa e n input noise voltage density f = 1khz, lt6013/lt6014 9.5 nv/ hz f = 1khz, lt6013a/lt6014a 9.5 13 nv/ hz input noise voltage (low frequency) bandwidth = 0.01hz to 1hz 200 nv p-p 50 nv rms bandwidth = 0.1hz to 10hz 200 nv p-p 40 nv rms i n input noise current density f = 1khz 0.15 pa/ hz input noise current (low frequency) bandwidth = 0.01hz to 1hz 7 pa p-p 1.3 pa rms bandwidth = 0.1hz to 10hz 5 pa p-p 0.4 pa rms r in input resistance common mode, v cm = 13.5v 400 g ? differential 20 m ? c in input capacitance 4pf v cm input voltage range guaranteed by cmrr 13.5 14 v cmrr common mode rejection ratio v cm = ?3.5v to 13.5v 115 135 db 112 135 db minimum supply voltage guaranteed by psrr 1.2 1.35 v psrr power supply rejection ratio v s = 1.35v to 18v 112 135 db a vol large-signal voltage gain r l = 10k, v out = ?3.5v to 13.5v 1000 2000 v/mv 600 v/mv r l = 5k, v out = ?3.5v to 13.5v 500 1500 v/mv 300 v/mv channel separation v out = ?3.5v to 13.5v, lt6014 120 140 db electrical characteristics the denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c. v s = 15v, v cm = 0v, r l to 0v, unless otherwise specified. (note 5) symbol parameter conditions min typ max units
lt6013/lt6014 7 60134fb v out maximum output swing no load, 50mv overdrive 45 80 mv (positive, referred to v + ) 100 mv i source = 1ma, 50mv overdrive 140 195 mv 240 mv maximum output swing no load, 50mv overdrive 45 80 mv (negative, referred to v ) 100 mv i sink = 1ma, 50mv overdrive 150 250 mv 300 mv i sc output short-circuit current v out = 0v, 1v overdrive (source) 8 15 ma (note 3) 5ma v out = 0v, 1v overdrive (sink) 8 20 ma 5ma sr slew rate a v = ?0, r f = 50k, r g = 5k 0.15 0.2 v/ s t a = 0 c to 70 c 0.12 v/ s t a = 40 c to 85 c 0.1 v/ s gbw gain bandwidth product f = 10khz 1.1 1.6 mhz 1 mhz t s settling time a v = ?, 0.01%, v out = 0v to 10v 40 s t r , t f rise time, fall time a v = 5, 10% to 90%, 0.1v step 0.9 s ? v os offset voltage match (note 7) lt6014as8 50 270 v t a = 0 c to 70 c 320 v t a = 40 c to 85 c 370 v lt6014add 50 320 v t a = 0 c to 70 c 420 v t a = 40 c to 85 c 450 v lt6014s8 70 300 v t a = 0 c to 70 c 350 v t a = 40 c to 85 c 400 v lt6014dd 80 400 v t a = 0 c to 70 c 500 v t a = 40 c to 85 c 550 v ? i b input bias current match (note 7) lt6014as8, lt6014add 200 800 pa t a = 0 c to 70 c 1200 pa t a = 40 c to 85 c 1400 pa lt6014s8, lt6014dd 300 1600 pa t a = 0 c to 70 c 2000 pa t a = 40 c to 85 c 2400 pa ? cmrr common mode rejection ratio lt6014 109 135 db match (note 7) ? psrr power supply rejection ratio lt6014 106 135 db match (note 7) i s supply current per amplifier 200 250 a t a = 0 c to 70 c 290 a t a = 40 c to 85 c 310 a electrical characteristics the denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c. v s = 15v, v cm = 0v, r l to 0v, unless otherwise specified. (note 5) symbol parameter conditions min typ max units
lt6013/lt6014 8 60134fb typical perfor a ce characteristics uw distribution of input offset voltage input offset voltage vs temperature offset voltage vs input common mode voltage input bias current vs temperature input bias current vs input common mode voltage ?5 input offset voltage ( v) 0 percent of units (%) 5 15 20 25 60134 g01 10 30 v s = 5v, 0v t a = 25 c lt6013as8 45 ?5 ?5 ? 5 15 25 35 45 temperature ( c) ?0 ?25 offset voltage ( v) ?00 ?0 ?5 0 125 50 0 50 75 60134 g02 ?5 75 100 25 ?5 25 100 125 v s = 5v, 0v representative units input common mode voltage (v) 1000 900 800 600 400 200 700 500 300 100 0 60134 g03 change in offset voltage ( v) v s = 5v, 0v t a = 85 c t a = 40 c t a = 25 c 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 5.0 4.5 temperature ( c) ?0 ?00 input bias current (pa) ?00 ?00 0 50 800 60134 g05 ?00 0 ?5 75 100 25 125 200 400 600 v s = 5v, 0v typical part input common mode voltage (v) 0 ?00 ?00 ?00 change in input bias current (pa) ?00 0 100 200 400 300 0.5 1.0 1.5 2.0 60134 g06 2.5 3.0 3.5 4.0 4.5 v s = 5v, 0v t a = 85 c t a = 25 c t a = 40 c input bias current (pa) ?75 0 percent of units (%) 5 15 30 35 20 25 ?5 25 ?5 60134 g04 10 ?25 75 125 175 lt6013as8 distribution of input bias current electrical characteristics note 1: absolute maximum ratings are those beyond which the life of the device may be impaired. note 2: the inputs are protected by back-to-back diodes and internal series resistors. if the differential input voltage exceeds 10v, the input current must be limited to less than 10ma. note 3: a heat sink may be required to keep the junction temperature below absolute maximum ratings. note 4: the lt6013c/lt6014c and lt6013i/lt6014i are guaranteed functional over the operating temperature range of 40 c to 85 c. note 5: the lt6013c and lt6014c are guaranteed to meet the specified performance from 0 c to 70 c and are designed, characterized and expected to meet specified performance from 40 c to 85 c but is not tested or qa sampled at these temperatures. the lt6013i and lt6014i are guaranteed to meet specified performance from 40 c to 85 c. note 6: this parameter is not 100% tested. note 7: matching parameters are the difference between the two amplifiers. ? cmrr and ? psrr are defined as follows: (1) cmrr and psrr are measured in v/v for the individual amplifiers. (2) the difference between matching amplifiers is calculated in v/v. (3) the result is converted to db. note 8: the specifications for v os , i b , and i os depend on the grade and on the package. the following table clarifies the notations. standard grade a grade s8 package lt6013s8, lt6014s8 lt6013as8, lt6014as8 dfn package lt6013dd, lt6014dd lt6013add, lt6014add
lt6013/lt6014 9 60134fb typical perfor a ce characteristics uw output voltage swing vs temperature output saturation voltage vs load current (output high) output saturation voltage vs load current (output low) temperature ( c) ?0 output voltage swing (mv) ?0 25 60134 g11 40 ?5 0 50 20 v v + ?0 ?0 60 75 100 125 v s = 5v, 0v no load output high output low load current (ma) 0.01 0.01 output high saturation voltage (v) 0.1 1 0.1 1 10 60134 g12 t a = 85 c t a = 25 c v s = 5v, 0v t a = 40 c load current (ma) 0.01 0.01 output low saturation voltage (v) 0.1 1 0.1 1 10 60134 g13 t a = 85 c t a = 25 c v s = 5v, 0v t a = 40 c 0.01hz to 1hz voltage noise time (sec) 0 input voltage noise (0.1 v/div) 80 60134 g10 20 40 60 100 70 10 30 50 90 v s = 5v, 0v t a = 25 c 0.1hz to 10hz voltage noise time (sec) 08 60134 g09 246 10 7 135 9 time (sec) input voltage noise (0.1 v/div) v s = 5v, 0v t a = 25 c 0.01hz to 1hz current noise time (sec) 080 60134 g32 20 40 60 100 70 10 30 50 90 input current noise (2pa/div) v s = 5v, 0v t a = 25 c balanced source resistance 0.1hz to 10hz current noise time (sec) 08 60134 g31 246 10 7 135 9 time (sec) input current noise (2pa/div) v s = 5v, 0v t a = 25 c balanced source resistance e n , i n vs frequency total input noise vs source resistance frequency (hz) 1 1 input voltage noise density (nv/ hz) input current noise density (fa/ hz) 10 100 1000 10 100 1000 60134 g07 current noise unbalanced source resistors voltage noise 1/f corner = 40hz 1/f corner = 2hz v s = 5v, 0v t a = 25 c source resistance ( ? ) 100 1k 10k 100k 1m 10m 0.0001 total input noise ( v/ hz) 0.01 10 100m 60134 g08 0.001 0.1 1 total noise resistor noise only v s = 5v, 0v t a = 25 c f = 1khz unbalanced source resistors
lt6013/lt6014 10 60134fb typical perfor a ce characteristics uw channel separation vs frequency cmrr vs frequency frequency (hz) 110 40 channel separation (db) 60 80 100 120 100 1k 10k 100k 1m 60134 g20 20 0 140 160 lt6014 v s = 5v, 0v t a = 25 c frequency (hz) 110 40 common mode rejection ratio (db) 60 80 100 120 100 1k 10k 100k 1m 60134 g21 20 0 140 160 t a = 25 c psrr vs frequency, single supply frequency (hz) 0.1 0 power supply rejection ratio (db) 80 100 120 140 1 10 100 1k 10k 100k 1m 60134 g19 60 40 20 v s = 5v, 0v t a = 25 c thd + noise vs frequency thd + noise vs frequency settling time vs output step frequency (hz) 10 0.0001 thd + noise (%) 0.01 10 1k 10k 100 100k 60134 g16 0.001 0.1 1 v s = 5v, 0v v out = 2v p-p t a = 25 c a v = 5 frequency (hz) 10 0.0001 thd + noise (%) 0.01 10 1k 10k 100 60134 g17 0.001 0.1 1 v s = 15v v out = 20v p-p t a = 25 c a v = 5 settling time ( s) 0 0 output step (v) 2 3 4 10 20 25 30 60134 g18 1 515 v s = 5v, 0v a v = 5 t a = 25 c 0.1% 0.01% supply current vs supply voltage warm-up drift supply voltage ( v) 0 supply current ( a) 300 400 500 16 60134 g14 200 100 250 350 450 150 50 0 4 2 8 6 12 14 18 10 20 per amplifier t a = 85 c t a = 40 c t a = 25 c time after power-on (seconds) 0 change in offset voltage ( v) 1 2 3 30 60 90 120 60134 g15 150 15v 2.5v psrr vs frequency, split supplies frequency (hz) 0.1 0 power supply rejection ratio (db) 80 100 120 140 1 10 100 1k 10k 100k 1m 60134 g22 60 40 20 v s = 15v t a = 25 c positive supply negative supply
lt6013/lt6014 11 60134fb small-signal transient response large-signal transient response rail-to-rail output swing 20mv/div a v = 5 2 s/div 60134 g28 1v/div a v = ? 20 s/div 60134 g29 v s = 5v, 0v r l = 2k 1v/div a v = ? 100 s/div 60134 g30 v s = 5v, 0v r l = 2k typical perfor a ce characteristics uw 5v 0v 5v 0v gain vs frequency, a v = 5 gain and phase vs frequency gain vs frequency, a v = 4 frequency (hz) ?0 open-loop gain (db) phase shift (deg) 50 60 ?0 ?0 40 10 30 20 0 1k 100k 1m 10m 60134 g25 ?0 ?0 240 ?20 ?60 ?00 280 10k phase gain v s = 5v, 0v t a = 25 c r l = 10k frequency (hz) 1k ? gain (db) 14 18 22 10k 100k 1m 60134 g26 10 6 2 v s = 5v, 0v t a = 25 c c l = 500pf c l = 50pf frequency (hz) 1k ? gain (db) 12 16 20 10k 100k 1m 60134 g27 8 4 0 v s = 5v, 0v t a = 25 c c l = 500pf c l = 50pf output impedance vs frequency open-loop gain vs frequency frequency (hz) 1 output impedance ( ? ) 1000 0.1 10 100 1 100 1k 10k 60134 g23 0.01 10 100k v s = 5v, 0v t a = 25 c a v = 100 a v = 10 a v = 5 frequency (hz) 20 120 100 80 60 40 ?0 0 open-loop gain (db) 140 0.01 10 100 1k 10k 100k 1m 10m 60134 g24 ?0 0.1 1 v s = 5v, 0v t a = 25 c r l = 10k
lt6013/lt6014 12 60134fb not unity-gain stable the lt6013 and lt6014 amplifiers are optimized for the lowest possible noise and smallest package size, and are intentionally decompensated to be stable in a gain con- figuration of 5 or greater. do not connect the amplifiers in a gain less than 5 (such as unity-gain). for a unity-gain stable amplifier with similar performance though slightly higher noise and lower bandwidth, see the lt6010 and lt6011/lt6012 datasheets. figure 1 shows simple inverting and non-inverting op amp configurations and indicates how to achieve a gain of 5 or greater. for more general feedback networks, determine the gain that the op amp ?ees?as follows: 1. suppose the op amp is removed from the circuit. 2. apply a small-signal voltage at the output node of the op amp. 3. find the differential voltage that would appear across the two inputs of the op amp. 4. the ratio of the output voltage to the input voltage is the gain that the op amp ?ees? this ratio must be 5 or greater. do not place a capacitor bigger than 200pf between the output to the inverting input unless there is a 5 times larger capacitor from that input to ac ground. otherwise, the op amp gain would drop to less than 5 at high frequencies, and the stability of the loop would be compromised. the lt6013 and lt6014 can be used in lower gain configurations when an impedance is connected between the op amp inputs. figure 2 shows inverting and non- inverting unity gain connections. the r c network across the op amp inputs results in a large enough noise gain at high frequencies, thereby ensuring stability. at low fre- quencies, the capacitor is an open circuit so the dc precision (offset and noise) remains very good. applicatio s i for atio wu uu figure 1. use lt6013 and lt6014 in a gain of 5 or greater r f r g v in v ref noninverting: signal gain = 1 + r f /r g op amp gain = 1 + r f /r g stable if 1 + r f /r g 5 60134 f01 + v in unity-gain: do not use + r f v ref inverting: signal gain = ? f /r g op amp gain = 1 + r f /r g stable if 1 + r f /r g 5 v in + r g figure 2. stabilizing op amp for unity gain operation v out v in + 10k 2.5k 1nf 60134 f02 v out v in + 10k 10k 3k 1nf unity gain inverter unity gain follower
lt6013/lt6014 13 60134fb applicatio s i for atio wu uu preserving input precision preserving the input accuracy of the lt6013 and lt6014 requires that the applications circuit and pc board layout do not introduce errors comparable to or greater than the 10 v typical offset of the amplifiers. temperature differen- tials across the input connections can generate thermo- couple voltages of 10? of microvolts so the connections to the input leads should be short, close together and away from heat dissipating components. air currents across the board can also generate temperature differentials. the extremely low input bias currents allow high accuracy to be maintained with high impedance sources and feed- back resistors. the lt6013 and lt6014 low input bias cur- rents are obtained by a cancellation circuit on-chip. this causes the resulting i b + and i b to be uncorrelated, as implied by the i os specification being comparable to i b . do not try to balance the input resistances in each input lead; instead keep the resistance at either input as low as pos- sible for maximum accuracy. leakage currents on the pc board can be higher than the input bias current. for example, 10g ? of leakage between a 15v supply lead and an input lead will generate 1.5na! surround the input leads with a guard ring driven to the same potential as the input common mode to avoid exces- sive leakage in high impedance applications. input protection the lt6013/lt6014 features on-chip back-to-back diodes between the input devices, along with 500 ? resistors in series with either input. this internal protection limits the input current to approximately 10ma (the maximum al- lowed) for a 10v differential input voltage. use additional external series resistors to limit the input current to 10ma in applications where differential inputs of more than 10v are expected. for example, a 1k resistor in series with each input provides protection against 30v differential voltage. input common mode range the lt6013/lt6014 output is able to swing close to each power supply rail (rail-to-rail out), but the input stage is limited to operating between v ? + 1v and v + ?1.2v. exceed- ing this common mode range will cause the gain to drop to zero; however, no phase reversal will occur. total input noise the lt6013 and lt6014 amplifiers contribute negligible noise to the system when driven by sensors (sources) with impedance between 10k ? and 1m ? . throughout this range, total input noise is dominated by the 4ktr s noise of the source. if the source impedance is less than 10k ? , the input voltage noise of the amplifier starts to contribute with a minimum noise of 9.5nv/ hz for very low source im- pedance. if the source impedance is more than 1m ? , the input current noise of the amplifier, multiplied by this high impedance, starts to contribute and eventually dominate. total input noise spectral density can be calculated as: v e ktr i r n total n s n s () () =+ + 2 2 4 where e n = 9.5nv/ hz , i n = 0.15pa/ hz and r s is the total impedance at the input, including the source impedance. capacitive loads the lt6013 and lt6014 can drive capacitive loads up to 500pf at a gain of 5. the capacitive load driving capability increases as the amplifier is used in higher gain configu- rations. a small series resistance between the output and the load further increases the amount of capacitance that the amplifier can drive.
lt6013/lt6014 14 60134fb si plified sche atic ww 60134 ss q22 q16 q3 q7 q8 c b a b a q15 v + v q1 q2 d2 d1 q11 q17 q21 q4 q6 q5 c2 q12 d3 d4 d5 q14 q20 q19 q13 q18 r3 r4 r6 r5 r c1 r1 500 ? r2 500 ? c1 c3 +in ?n out q9 q10 (one amplifier)
lt6013/lt6014 15 60134fb u package descriptio dd package 8-lead plastic dfn (3mm 3mm) (reference ltc dwg # 05-08-1698) 3.00 0.10 (4 sides) note: 1. drawing to be made a jedec package outline m0-229 variation of (weed-1) 2. drawing not to scale 3. all dimensions are in millimeters 4. dimensions of exposed pad on bottom of package do not include mold flash. mold flash, if present, shall not exceed 0.15mm on any side 5. exposed pad shall be solder plated 6. shaded area is only a reference for pin 1 location on top and bottom of package 0.38 0.10 bottom view?xposed pad 1.65 0.10 (2 sides) 0.75 0.05 r = 0.115 typ 2.38 0.10 (2 sides) 1 4 8 5 pin 1 top mark (note 6) 0.200 ref 0.00 ?0.05 (dd8) dfn 1203 0.25 0.05 2.38 0.05 (2 sides) recommended solder pad pitch and dimensions 1.65 0.05 (2 sides) 2.15 0.05 0.50 bsc 0.675 0.05 3.5 0.05 package outline 0.25 0.05 0.50 bsc s8 package 8-lead plastic small outline (narrow .150 inch) (reference ltc dwg # 05-08-1610) .016 ?.050 (0.406 ?1.270) .010 ?.020 (0.254 ?0.508) 45 0 ?8 typ .008 ?.010 (0.203 ?0.254) so8 0303 .053 ?.069 (1.346 ?1.752) .014 ?.019 (0.355 ?0.483) typ .004 ?.010 (0.101 ?0.254) .050 (1.270) bsc 1 2 3 4 .150 ?.157 (3.810 ?3.988) note 3 8 7 6 5 .189 ?.197 (4.801 ?5.004) note 3 .228 ?.244 (5.791 ?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) 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.
lt6013/lt6014 16 60134fb linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax: (408) 434-0507 www.linear.com ? linear technology corporation 2004 lt/lt 0305 rev b ? printed in usa part number description comments lt1112/lt1114 dual/quad low power, picoamp input precision op amps 250pa input bias current lt1880 rail-to-rail output, picoamp input precision op amp sot-23 lt1881/lt1882 dual/quad rail-to-rail output, picoamp input precision op amps c load up to 1000pf lt1884/lt1885 dual/quad rail-to-rail output, picoamp input precision op amps 9.5nv/ hz input noise lt6011/lt6012 dual/quad low power rail-to-rail output, precision op amps 14nv/ hz, unity-gain stable version of lt6014 lt6010 single low power rail-to-rail output, precision op amp 200pa input bias current, shutdown feature related parts u typical applicatio low power hall sensor amplifier + lt1782 + 1/2 lt6014 v s v s + v out 7.87k 1% v s = 3v to 18v i s = ~600 a v out = ~40mv/mt 1, 2 4 6 10k offset adjust 1 3 2 400 ? 4 hall element asahi-kasei hw-108a (rank d) www.asahi-kasei.co.jp 26.7k 1% 49.9k 0.1 f 49.9k v s 4 499 ? 499 ? 4 60134 ta02 7 1 8 6 3 2 5 100k 1% lt1790-1.25 + 1/2 lt6014 1 f precision micropower photodiode amplifier 60134 ta04 c d 170pf v s + v s r1 100k c1 20pf v out 880nm ir photodiode opto-diode corp odd-45w i photodiode gain: a z = 100k ? = 10% to 90% rise time: t r = 3.2 s bandwidth: bw = 110khz i photodiode v out v s = 1.35v to 18v c1, cd satisfy gain of 5 stability requirement at ac output offset = 60 v max for lt6013as8 + lt6013

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