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LT6010 1 6010f applicatio s u features typical applicatio u descriptio u n thermocouple amplifiers n precision photo diode amplifiers n instrumentation amplifiers n battery-powered precision systems n 35 m v maximum offset voltage n 110pa maximum input bias current n 135 m a supply current n rail-to-rail output swing n 12 m a supply current in shutdown n 120db minimum voltage gain (v s = 15v) n 0.8 m v/ c maximum v os drift n 14nv/ ? hz input noise voltage n 2.7v to 18v supply voltage operation n operating temperature range: C 40 c to 85 c n space saving 3mm 3mm dfn package 135 m a, 14nv/ ? hz, rail-to-rail output precision op amp with shutdown , ltc and lt are registered trademarks of linear technology corporation. the lt ? 6010 op amp combines low noise and high preci- sion input performance with low power consumption and rail-to-rail output swing. input offset voltage is trimmed to less than 35 m v. the low drift and excellent long-term stability guarantee a high accuracy over temperature and over time. the 110pa maximum input bias current and 120db minimum voltage gain further maintain this precision over operating conditions. the LT6010 works on any power supply voltage from 2.7v to 36v, and draws only 135 m a of supply current on a 5v supply. a power saving shutdown feature reduces supply current to 12 m a. the output voltage swings to within 40mv of either supply rail, making the amplifier a good choice for low voltage single supply operation. the LT6010 is fully specified at 5v and 15v supplies and from C40 c to 85 c. the device is available in so-8 and space-saving 3mm 3mm dfn packages. this op amp is also available in dual (lt6011) and quad (lt6012) packages. single supply current source for platinum rtd + v s v s r1 12.4k 0.1% r2 100 1% c1 0.1 f 1k at 0 c rtd* r5 1k, 5% r4 1k, 5% v out = 100mv at 0 c + 385 v/ c ?0 c to 600 c + 6010 ta01a v s = 2.7v to 20v i cc ? 320 a *omega f3141 1k , 0.1% platinum rtd (800) 826-6342 LT6010 2 1 2 64 7 6 4 3 1 f lt1790-1.25 distribution of offset voltage drift distribution ( v/ c) 0.8 0.6 0.4 0.2 percentage of units (%) 6010 ta01b 0 0.4 0.6 0.8 0.2 20 18 16 14 12 10 8 6 4 2 0 v s = 2.5v so-8 packages
LT6010 2 6010f total supply voltage (v + to v C ) .............................. 40v differential input voltage (note 2) .......................... 10v input voltage, shutdown voltage ..................... v + to v C input current (note 2) ....................................... 10ma output short-circuit duration (note 3) ........... indefinite operating temperature range (note 4) .. C 40 c to 85 c specified temperature range (note 5) ... C 40 c to 85 c order part number dd part marking* t jmax = 125 c, q ja = 160 c/w underside metal internally connected to v C (pcb connection optional) LT6010cdd LT6010idd LT6010acdd LT6010aidd (note 1) absolute axi u rati gs w ww u package/order i for atio uu w *temperature grades are identified by a label on the shipping container. consult ltc marketing for parts specified with wider operating temperature ranges. top view dd package 8-lead (3mm 3mm) plastic dfn 5 6 7 8 4 3 2 1 null ?n +in v null v + out shdn + order part number s8 part marking LT6010cs8 LT6010is8 LT6010acs8 LT6010ais8 6010 6010i 6010a 6010ai t jmax = 150 c, q ja = 190 c/w 1 2 3 4 8 7 6 5 top view null v + out shdn null ?n +in v s8 package 8-lead plastic so + maximum junction temperature dd package ..................................................... 125 c so-8 package .................................................. 150 c storage temperature range dd package ..................................... C 65 c to 125 c so-8 package .................................. C 65 c to 150 c lead temperature (soldering, 10 sec).................. 300 c ladu the l 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; shdn = 0.2v, unless otherwise specified. (note 5) electrical characteristics symbol parameter conditions min typ max units v os input offset voltage (note 7) LT6010as8 10 35 m v t a = 0 c to 70 c l 60 m v t a = C40 c to 85 c l 75 m v LT6010s8 20 55 m v t a = 0 c to 70 c l 85 m v t a = C40 c to 85 c l 110 m v LT6010add 20 60 m v t a = 0 c to 70 c l 85 m v t a = C40 c to 85 c l 100 m v LT6010dd 30 80 m v t a = 0 c to 70 c l 110 m v t a = C40 c to 85 c l 135 m v d v os / d t input offset voltage drift (note 6) LT6010as8, LT6010s8 l 0.2 0.8 m v/ c LT6010add,LT6010dd l 0.2 1.3 m v/ c
LT6010 3 6010f the l 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; shdn = 0.2v, unless otherwise specified. (note 5) electrical characteristics symbol parameter conditions min typ max units i os input offset current (note 7) LT6010as8 20 110 pa t a = 0 c to 70 c l 150 pa t a = C40 c to 85 c l 200 pa LT6010s8 40 200 pa t a = 0 c to 70 c l 300 pa t a = C40 c to 85 c l 400 pa LT6010add 20 200 pa t a = 0 c to 70 c l 300 pa t a = C40 c to 85 c l 400 pa LT6010dd 40 300 pa t a = 0 c to 70 c l 400 pa t a = C40 c to 85 c l 500 pa i b input bias current (note 7) LT6010as8 20 110 pa t a = 0 c to 70 c l 150 pa t a = C40 c to 85 c l 200 pa LT6010s8 40 200 pa t a = 0 c to 70 c l 300 pa t a = C40 c to 85 c l 400 pa LT6010add 20 200 pa t a = 0 c to 70 c l 300 pa t a = C40 c to 85 c l 400 pa LT6010dd 40 300 pa t a = 0 c to 70 c l 400 pa t a = C40 c to 85 c l 500 pa input noise voltage 0.1hz to 10hz 400 nv p-p e n input noise voltage density f = 1khz 14 nv/ ? hz i n input noise current density f = 1khz 0.1 pa/ ? hz r in input resistance common mode, v cm = 1v to 3.8v 10 120 g w differential 20 m w c in input capacitance 4pf v cm input voltage range (positive) guaranteed by cmrr l 3.8 4 v input voltage range (negative) guaranteed by cmrr l 0.7 1 v cmrr common mode rejection ratio v cm = 1v to 3.8v l 107 135 db minimum supply voltage guaranteed by psrr l 2.4 2.7 v psrr power supply rejection ratio v s = 2.7v to 36v, v cm = 1/2v s l 112 135 db a vol large-signal voltage gain r l = 10k, v out = 1v to 4v l 300 2000 v/mv r l = 2k, v out = 1v to 4v l 250 2000 v/mv v out maximum output swing no load, 50mv overdrive 35 55 mv (positive, referred to v + ) l 65 mv i source = 1ma, 50mv overdrive 120 170 mv l 220 mv maximum output swing no load, 50mv overdrive 40 55 mv (negative, referred to 0v) l 65 mv i sink = 1ma, 50mv overdrive 150 225 mv l 275 mv
LT6010 4 6010f electrical characteristics the l 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; shdn = 0.2v, unless otherwise specified. (note 5) the l 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; shdn = C14.8v, unless otherwise specified. (note 5) symbol parameter conditions min typ max units v os input offset voltage (note 7) LT6010as8 10 60 m v t a = 0 c to 70 c l 80 m v t a = C40 c to 85 c l 110 m v LT6010s8 20 85 m v t a = 0 c to 70 c l 120 m v t a = C40 c to 85 c l 160 m v LT6010add 20 85 m v t a = 0 c to 70 c l 105 m v t a = C40 c to 85 c l 135 m v LT6010dd 30 110 m v t a = 0 c to 70 c l 145 m v t a = C40 c to 85 c l 185 m v d v os / d t input offset voltage drift (note 6) LT6010as8, LT6010s8 l 0.2 0.8 m v/ c LT6010add,LT6010dd l 0.2 1.3 m v/ c i os input offset current (note 7) LT6010as8 20 110 pa t a = 0 c to 70 c l 150 pa t a = C40 c to 85 c l 200 pa LT6010s8 40 200 pa t a = 0 c to 70 c l 300 pa t a = C40 c to 85 c l 400 pa LT6010add 20 200 pa t a = 0 c to 70 c l 300 pa t a = C40 c to 85 c l 400 pa symbol parameter conditions min typ max units i sc output short-circuit current (note 3) v out = 0v, 1v overdrive (source) 10 14 m a l 4ma v out = 5v, C1v overdrive (sink) 10 21 m a l 4ma sr slew rate a v = C10, r f = 50k, r g = 5k 0.06 0.09 v/ m s t a = 0 c to 70 c l 0.05 v/ m s t a = C40 c to 85 c l 0.04 v/ m s gbw gain bandwidth product f = 10khz 250 330 khz l 225 khz t s settling time a v = C1, 0.01%, v out = 1.5v to 3.5v 45 m s t r , t f rise time, fall time a v = 1, 10% to 90%, 0.1v step 1 m s i shdn shdn pin current shdn v C + 0.2v (on) l 0.25 m a shdn = v C + 2.0v (off) l 15 25 m a t shdn shdn turn-on, turn-off time shdn = v C (on) to v C + 2.0v (off) 25 m s shdn = v C + 2.0v (off) to v C (on) 25 m s i s supply current shdn v C + 0.2v (on) 135 150 m a t a = 0 c to 70 c l 190 m a t a = C40 c to 85 c l 210 m a shdn = v C + 2.0v (off) 12 25 m a l 50 m a
LT6010 5 6010f electrical characteristics the l 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; shdn = C14.8v, unless otherwise specified. (note 5) symbol parameter conditions min typ max units i os input offset current (note 7) LT6010dd 40 300 pa t a = 0 c to 70 c l 400 p a t a = C40 c to 85 c l 500 pa i b input bias current (note 7) LT6010as8 20 110 pa t a = 0 c to 70 c l 150 p a t a = C40 c to 85 c l 200 pa LT6010s8 40 200 pa t a = 0 c to 70 c l 300 p a t a = C40 c to 85 c l 400 pa LT6010add 20 200 pa t a = 0 c to 70 c l 300 pa t a = C40 c to 85 c l 400 pa LT6010dd 40 300 pa t a = 0 c to 70 c l 400 pa t a = C40 c to 85 c l 500 pa input noise voltage 0.1hz to 10hz 400 nv p-p e n input noise voltage density f = 1khz 13 nv/ ? hz i n input noise current density f = 1khz 0.1 pa/ ? hz r in input resistance common mode, v cm = 13.5v 50 400 g w differential 20 m w c in input capacitance 4pf v cm input voltage range guaranteed by cmrr l 13.5 14 v cmrr common mode rejection ratio v cm = C13.5v to 13.5v 115 135 d b l 112 db minimum supply voltage guaranteed by psrr l 1.2 1.35 v psrr power supply rejection ratio v s = 1.35v to 18v l 112 135 db a vol large-signal voltage gain r l = 10k, v out = C13.5v to 13.5v 1000 2000 v/mv l 600 v/mv r l = 5k, v out = C13.5v to 13.5v 500 1500 v/mv l 300 v/mv v out maximum output swing no load, 50mv overdrive 45 80 m v (positive, referred to v + ) l 100 mv i source = 1ma, 50mv overdrive 140 195 m v l 240 mv maximum output swing no load, 50mv overdrive 45 80 m v (negative, referred to 0v) l 100 mv i sink = 1ma, 50mv overdrive 150 250 m v l 300 mv i sc output short-circuit current (note 3) v out = 0v, 1v overdrive (source) 10 15 m a l 5ma v out = 0v, C1v overdrive (sink) 10 20 m a l 5ma
LT6010 6 6010f note 1: absolute maximum ratings are those beyond which the life of the device may be impaired. note 2: the inputs are protected by backCtoCback 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: both the LT6010c and LT6010i are guaranteed functional over the operating temperature range of C40 c to 85 c. note 5: the LT6010c is guaranteed to meet the specified performance from 0 c to 70 c and is designed, characterized and expected to meet specified performance from C40 c to 85 c but is not tested or qa sampled at these temperatures. the LT6010i is guaranteed to meet specified performance from C40 c to 85 c. note 6: this parameter is not 100% tested. note 7: the specifications for v os , i b and i os depend on the grade and on the package. the following table clarifies the notations used in the specification table: standard grade a grade s8 package LT6010s8 LT6010as8 dfn package LT6010dd LT6010add electrical characteristics typical perfor a ce characteristics uw distribution of input offset voltage input offset voltage vs temperature offset voltage vs input common mode voltage ?5 input offset voltage ( v) 0 percent of units (%) 5 15 20 25 6010 g01 10 30 v s = 5v, 0v t a = 25 c LT6010as8 45 ?5 ?5 ? 5 15 25 35 45 temperature ( c) ?0 ?25 offset voltage ( v) ?00 ?0 ?5 0 125 50 0 50 75 6010 g02 ?5 75 100 25 ?5 25 100 125 v s = 5v, 0v representative units input common mode voltage (v) ?5 120 100 80 60 40 20 0 ?0 010 6010 g03 ?0 ? 515 offset voltage ( v) t a = 85 c t a = 25 c t a = 40 c v s = 15v typical part symbol parameter conditions min typ max units sr slew rate a v = C10, r f = 50k, r g = 5k 0.08 0.11 v/ m s t a = 0 c to 70 c l 0.07 v/ m s t a = C40 c to 85 c l 0.05 v/ m s gbw gain bandwidth product f = 10khz 275 350 khz l 250 khz t s settling time a v = C1, 0.01%, v out = 0v to 10v 85 m s t r , t f rise time, fall time a v = 1, 10% to 90%, 0.1v step 1 m s i shdn shdn pin current shdn v C + 0.2v (on) l 0.25 m a shdn = v C + 2.0v (off) l 15 25 m a t shdn shdn turn-on, turn-off time shdn = v C (on) to v C + 2.0v (off) 25 m s shdn = v C + 2.0v (off) to v C (on) 25 m s i s supply current shdn v C + 0.2v (on) 260 330 m a t a = 0 c to 70 c l 380 m a t a = C40 c to 85 c l 400 m a shdn = v C + 2.0v (off) 18 50 m a the l 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; shdn = C14.8v, unless otherwise specified. (note 5)
LT6010 7 6010f total input noise vs source resistance 0.1hz to 10hz noise source resistance ( ) 100 1k 10k 100k 1m 10m 0.0001 total input noise ( v/ hz) 0.01 10 100m 6010 g07 0.001 0.1 1 total noise resistor noise only v s = 5v, 0v t a = 25 c f = 1khz 0.01hz to 1hz noise time (sec) 0 noise voltage (0.2 v/div) 8 6010 g08 246 10 7 135 9 v s = 15v t a = 25 c time (sec) 0 noise voltage (0.2 v/div) 80 6010 g09 20 40 60 100 70 10 30 50 90 v s = 15v t a = 25 c 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 6010 g10 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 6010 g11 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 6010 g12 t a = 85 c t a = 25 c v s = 5v, 0v t a = 40 c input bias current vs temperature input bias current vs input common mode voltage e n , i n vs frequency temperature ( c) ?0 input bias current (pa) ?00 200 100 400 300 600 500 50 6010 g04 0 0 ?5 75 100 25 i b i b + 125 800 700 900 1000 v s = 5v, 0v typical part frequency (hz) 1 10 input voltage noise density (nv/ hz) input current noise density (fa/ hz) 100 100 1000 10 100 1000 6010 g06 current noise voltage noise v s = 15v t a = 25 c 2v/div 20pa/div 100 100 6010 g05 ?5 15 t a = 40 c t a = 85 c t a = 25 c
LT6010 8 6010f typical perfor a ce characteristics uw thd + noise vs frequency settling time vs output step settling time vs output step frequency (hz) 10 0.0001 thd + noise (%) 0.01 10 1k 10k 100 6010 g16 0.001 0.1 1 v s = 15v v in = 20v p-p t a = 25 c a v = ? a v = 1 settling time ( s) 0 0 output step (v) 2 6 8 10 20 40 50 90 6010 g17 4 10 30 60 70 80 v s = 15v a v = 1 0.1% 0.01% settling time ( s) 0 0 output step (v) 2 6 8 10 20 40 50 90 6010 g18 4 10 30 60 70 80 v s = 15v a v = 1 0.1% 0.01% cmrr vs frequency psrr vs frequency frequency (hz) 110 40 common mode rejection ratio (db) 60 80 100 120 100 1k 10k 100k 1m 6010 g20 20 0 140 160 t a = 25 c v s = 15v v s = 5v, 0v frequency (hz) 0.1 0 power supply rejection ratio (db) 80 100 120 140 1 10 100 1k 10k 100k 1m 6010 g21 60 40 20 v s = 5v, 0v t a = 25 c psrr +psrr supply current vs supply voltage warm-up drift thd + noise vs frequency supply voltage ( v) 0 supply current ( a) 300 400 500 16 6010 g13 200 100 250 350 450 150 50 0 4 2 8 6 12 14 18 10 20 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 6010 g14 150 15v 2.5v frequency (hz) 10 0.0001 thd + noise (%) 0.01 10 1k 10k 100 100k 6010 g15 0.001 0.1 1 v s = 5v, 0v v out = 2v p-p t a = 25 c a v = 1: r l = 10k a v = ?: r f = r g = 10k a v = ? a v = 1
LT6010 9 6010f typical perfor a ce characteristics uw gain vs frequency, a v = 1 gain vs frequency, a v = C1 frequency (hz) 1k ?0 gain (db) 0 5 10 10k 100k 1m 6010 g25 ? ?0 ?5 v s = 5v, 0v t a = 25 c c l = 500pf c l = 50pf frequency (hz) 1k ?0 gain (db) 0 5 10 10k 100k 1m 6010 g26 ? ?0 ?5 v s = 5v, 0v t a = 25 c c l = 500pf c l = 50pf small-signal transient response large-signal transient response rail-to-rail output swing 20mv/div a v = 1 2 m s/div 6011 g27 2v/div a v = C1 50 m s/div 6011 g28 v s = 15v 1v/div a v = C1 100 m s/div 6011 g29 v s = 5v, 0v 0v 0v 5v supply current in shutdown mode vs temperature output impedance vs frequency open-loop gain vs frequency gain and phase vs frequency frequency (hz) 1 output impedance ( ) 1000 0.1 10 100 1 100 1k 10k 100k 1m 6010 g22 0.01 10 v s = 5v, 0v t a = 25 c a v = 100 a v = 10 a v = 1 frequency (hz) 20 120 100 80 60 40 ?0 0 open-loop gain (db) 140 0.01 10 100 1k 10k 100k 1m 10m 6010 g23 ?0 0.1 1 v s = 5v, 0v t a = 25 c r l = 10k frequency (hz) ?0 open-loop gain (db) phase shift (deg) 50 60 ?0 ?0 40 10 30 20 0 1k 100k 1m 10m 6010 g24 ?0 ?0 240 ?20 ?60 ?00 280 10k phase gain v s = 5v, 0v t a = 25 c r l = 10k temperature ( c) ?0 supply current in shutdown ( a) 80 6010 g30 ?0 ?0 0 30 40 60 70 90 20 50 40 35 30 25 20 15 10 5 0 v s = 15v v s = 5v, 0v 10 ?0
LT6010 10 6010f preserving input precision preserving the input accuracy of the LT6010 requires that the applications circuit and pc board layout do not intro- duce errors comparable to or greater than the 20 m v typical offset of the amplifier. temperature differentials across the input connections can generate thermocouple volt- ages of 10s 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 (20pa typical) allow high accuracy to be maintained with high impedance sources and feedback resistors. the LT6010 low input bias currents are obtained by a cancellation circuit on- chip. the input bias currents are permanently trimmed at wafer testing to a low level. do not try to balance the input resistances in each input lead; instead, keep the resistance at either input as low as possible for maximum accuracy. leakage currents on the pc board can be higher than the LT6010s input bias current. for example, 10g w of leak- age between a 15v supply lead and an input lead will gen- erate 1.5na! surround the input leads by a guard ring, driven to the same potential as the input common mode, to avoid excessive leakage in high impedance applications. input protection the LT6010 features on-chip back-to-back diodes be- tween the input devices, along with 500 w resistors in series with either input. this internal protection limits the input current to approximately 10ma (the maximum allowed) 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 LT6010 output is able to swing nearly to each power supply rail (rail-to-rail out), but the input stage is limited to operating between v C + 1v and v + C 1.2v. exceeding this common mode range will cause the gain to drop to zero, however no phase reversal will occur. total input noise the LT6010 amplifier contributes negligible noise to the system when driven by sensors (sources) with impedance between 20k w and 1m w . throughout this range, total input noise is dominated by the 4ktr s noise of the source. if the source impedance is less than 20k w , the input voltage noise of the amplifier starts to contribute with a minimum noise of 14nv/ ? hz for very low source imped- ance. if the source impedance is more than 1m w , 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 = 14nv/ ? hz, i n = 0.1pa/ ? hz and r s the total impedance at the input, including the source impedance. applicatio s i for atio wu uu
LT6010 11 6010f applicatio s i for atio wu uu offset voltage adjustment the input offset voltage of the LT6010 and its drift with temperature are permanently trimmed at wafer testing to the low level as specified in the electrical characteristic. however, if further adjustment of v os is desired, nulling with a 50k potentiometer is possible and will not degrade drift with temperature. trimming to a value other than zero + 6010 f01a 3 2 1 8 LT6010 input output v cc v ee 50k 4 6 7 + 6010 f02a 3 2 1 8 LT6010 10k 50k 10k 4 6 7 input output v cc v ee potentiometer position 0 0.2 0.4 0.6 0.8 1.0 change in offset voltage (mv) 6010 f01b 1.0 0.8 0.6 0.4 0.2 0 ?.2 ?.4 ?.6 ?.8 ?.0 potentiometer position 0 1.0 change in offset voltage ( v) 6010 f02b ?00 200 150 100 50 0 ?0 ?00 ?50 0.2 0.4 0.6 0.8 standard adjustment improved sensitivity adjustment figure 1a figure 1b figure 2a figure 2b creates a drift of (v os /300 m v) m v/ c, e.g., if v os is adjusted to 300 m v, the change in drift will be 1 m v/ c. the adjustment range with a 50k pot is approximately 0.9mv (see figures 1a and 1b). the sensitivity and resolution of the nulling can be improved by using a smaller pot in conjunction with fixed resistors. the configuration shown has an approximate nulling range of 150 m v (see figures 2a and 2b).
LT6010 12 6010f shutdown the LT6010 can be put into shutdown mode to conserve power. when the shdn pin is biased at less than 0.2v above the negative supply, the part operates normally. when pulled 2v or more above v C , the supply current drops to about 12 m a, shutting down the op amp. the output of the LT6010 op amp is not isolated from the inputs while in shutdown mode. therefore, this shutdown feature cannot be used for multiplexing applications. there is an internal 85k resistor at the shdn pin. if the shdn voltage source is more than 2v above the negative supply, an external series resistor can be placed between the source and shdn pin to reduce shdn pin current (see figure 3). for an example of suggested values see table 1. the resistors listed ensure that the voltage at the shdn pin is 2v above the negative supply. table 1 v shdn (v) r shdn (k w ) 2 none 3 77k 4 153k 5 230k applicatio s i for atio wu uu rail-to-rail operation the LT6010 outputs can swing to within millivolts of either supply rail, but the inputs cannot. however, for most op amp configurations, the inputs need to swing less than the outputs. figure 4 shows the basic op amp configurations, lists what happens to the op amp inputs and specifies whether or not the op amp must have rail-to-rail inputs. select a rail-to-rail input op amp only when really neces- sary, because the input precision specifications are usu- ally inferior. 6010 f03 v ee r shdn v shdn shdn 85k 5 v ee + figure 3 r g v ref noninverting: a v = 1 + r f /r g inputs move as much as v in , but the output moves more input may not have to be rail-to-rail noninverting: a v = 1 inputs move as much as the output input must be rail-to-rail for overall circuit rail-to-rail performance inverting: a v = r f /r g op amp inputs do not move, but are fixed at dc bias point v ref input does not have to be rail-to-rail v in r f + v in v ref r f r g + v in 6010 f04 + figure 4. some op amp configurations do not require rail-to-rail inputs to achieve rail-to-rail outputs capacitive loads the LT6010 can drive capacitive loads up to 500pf in unity gain. the capacitive load driving capability increases as the amplifier is used in higher gain configurations. a small series resistance between the output and the load further increases the amount of capacitance that the amplifier can drive.
LT6010 13 6010f si plified sche atic ww 6010 ss q17 q16 q3 q7 q8 c b a b a q15 v + v q1 q2 d2 d1 q11 q10 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 6 4 3 2 8 7 null null 1 shdn 5 bias current generator
LT6010 14 6010f 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. all dimensions are in millimeters 3. 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 4. exposed pad shall be solder plated 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 0.200 ref 0.00 ?0.05 (dd8) dfn 0203 0.28 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 0.28 0.05 0.50 bsc
LT6010 15 6010f u package descriptio 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.
LT6010 16 6010f linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 l fax: (408) 434-0507 l www.linear.com ? linear technology corporation 2003 lt/tp 1103 1k ? printed in usa part number description comments lt6011/6012 dual/quad precision op amps 135 m a, rail-to-rail output lt1001 low power, picoamp input precision op amp 250pa input bias current lt1880 rail-to-rail output, picoamp input precision op amp c load up to 1000pf related parts u typical applicatio precision jfet input transimpedance photodiode amplifier + 6010 ta02 c4 0.5pf c3 1pf s1 u1 LT6010 + u2 lt6230 v + v v r1 330k, 5% r2 1k 5% r3 100k, 1% c1 0.01 f c2 0.1 f j1 j1: philips bf862 s1: siemens/infineon sfh203 photodiode (~3pf) v supply = 5v i supply = 5.6ma bandwidth = 6mhz a z = 100k output offset 50 v typically v out r4 2.55k

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