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1 lt1494/lt1495/lt1496 typical applicatio n u applicatio s u features 1.5 m a max, single, dual and quad over-the-top precision rail-to-rail input and output op amps low supply current: 1.5 m a max rail-to-rail input and output low offset voltage: 375 m v max operating temperature range: 40 c to 125 c over-the-top tm inputs operate above v + wide supply range: 2.2v to 36v single supply input range: C 0.3v to 36v low input bias current: 250pa low input offset current: 20pa high a vol : 100v/mv minimum driving 100k w load output sources and sinks 500 m a load current reverse battery protected to 18v the lt ? 1494/lt1495/lt1496 are the lowest power (i s 1.5 m a) op amps with precision specifications. the extremely low supply current is combined with excellentamplifier specifications: input offset voltage is 375 m v maximum with a typical drift of only 0.4 m v/ c, input offset current is 100pa maximum. a minimum open-loop gain(a vol ) of 100v/mv ensures that gain errors are small. the device characteristics change little over the supply rangeof 2.2v to 15v. supply rejection is 90db and the common mode rejection ratio is 90db. operation is specified for 3v,5v and 15v supplies. reverse battery protection (C18v? min) and inputs that operate above the positive supply make the lt1494/lt1495/lt1496 easy to use in harsh environments. the low bias currents and offset current of the amplifier permit the use of megohm level source resistors without introducing significant errors. voltage noise at 4 m v p-p is remarkably low considering the low supply current.the lt1494 is available in the 8-pin msop, pdip and so packages.the lt1495 is available in plastic 8-pin pdip and so packages with the standard dual op amp pinout. the lt1496 is available in 14-pin so and pdip packages. battery- or solar-powered systems portable instrumentation remote sensor amplifier micropower filter micropower integrating current sense + C 1/2 lt1495 0.1 f reset r i 1m 1m r s 0.1 load + C 1/2 lt1495 i l v cc 10m 10m v cc v o output switcheswhen i l dt = 0.98 v cc i s = 3 a during integration; i s = 5 a end of integration c = (4.9a)(sec) for v cc = 5v r i r s () 1495 ta01 200k tc v os distribution tc v os ( v/ c) units 3025 20 15 10 50 C1.2 C0.4 0.4 1.2 1495 ta02 2.0 C1.6 C 2.0 C0.8 0 0.8 1.6 100 amplifiersv s = 2.5v C40 c to 85 c descriptio u , ltc and lt are registered trademarks of linear technology corporation. over-the-top is a trademark of linear technology corporation. downloaded from: http:///
2 lt1494/lt1495/lt1496 total supply voltage (v + to v C ) .............................. 36v differential input voltage ......................................... 36v input current ...................................................... 10ma output short-circuit duration ....................... continuous operating temperature range (note 2) lt1494c/lt1495c/lt1496c .............. C 40 c to 85 c lt1494i/lt1495i/lt1496i ................. C 40 c to 85 c lt1494h/lt1495h/lt1496h ........... C 40 c to 125 c specified temperature range (note 3) lt1494c/lt1495c/lt1496c .............. C 40 c to 85 c lt1494i/lt1495i/lt1496i ................. C 40 c to 85 c lt1494h/lt1495h/lt1496h ........... C 40 c to 125 c storage temperature range ................. C 65 c to 150 c junction temperature ........................................... 150 c lead temperature (soldering, 10 sec).................. 300 c absolute m axi m u m ratings w ww u package/order i n for m atio n w u u order part number consult ltc marketing for parts specified with wider operating temperature ranges. t jmax = 150 c, q ja = 130 c/ w (n) t jmax = 150 c, q ja = 160 c/ w (s) t jmax = 150 c, q ja = 130 c/ w (n8) t jmax = 150 c, q ja = 190 c/ w (s8) s8 part marking 14951495i 1495h lt1495cn8lt1495cs8 lt1495in8 lt1495is8 lt1495hs8 order part number lt1496cnlt1496cs lt1496in lt1496is lt1496hs (note 1) 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 s8 package 8-lead plastic so a b 12 3 4 5 6 7 top view n package 14-lead pdip s package 14-lead plastic so 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 a d b c order part number ms8 part marking 14941494i 1494h lt1494cn8lt1494cs8 lt1494in8 lt1494is8 lt1494hs8 order part number s8 part marking lt1494cms8lt1494ims8 ltffltfg top view ncv + outnc nc Cin +in v C 12 3 4 87 6 5 n8 package 8-lead pdip s8 package 8-lead plastic so t jmax = 150 c, q ja = 130 c/ w (n8) t jmax = 150 c, q ja = 190 c/ w (s8) t jmax = 150 c, q ja = 250 c/ w 12 3 4 87 6 5 top view ms8 package 8-lead plastic msop ncv + outnc nc Cin +in v C downloaded from: http:///
3 lt1494/lt1495/lt1496 symbol parameter conditions min typ max units v os input offset voltage v s = 5v 150 375 m v v s = 3v 200 475 m v v s = 5v, ms8 package 150 475 m v v s = 3v, ms8 package 200 575 m v i b input bias current (note 5) 250 1000 pa v cm = 10v (note 6) 180 360 na i os input offset current (note 5) 20 100 pa input noise voltage 0.1hz to 10hz 4 m v p-p e n input noise voltage density f = 100hz 185 nv/ ? hz i n input noise current density f = 100hz 10 fa/ ? hz a vol large-signal voltage gain v s = 5v, v o = 0.25v to 4.5v, r l = 100k 100 500 v/mv v s = 3v, v o = 0.25v to 2.5v, r l = 100k 50 250 v/mv input voltage range 0 36 v cmrr common mode rejection ratio v cm = 0v to 4v, v s = 5v 90 106 db v cm = 0v to 10v, v s = 5v 74 95 db psrr power supply rejection ratio v s = 2.2v to 12v, v cm = v o = 0.5v 90 99 db minimum operating supply voltage 2.1 2.2 v v ol output voltage swing low no load 50 100 mv i sink = 100 m a 210 410 mv v oh output voltage swing high no load v + C 0.07 v + C 0.035 v i source = 100 m av + C 0.32 v + C 0.160 v i sc short-circuit current (note 5) 0.7 1.3 ma i s supply current per amplifier (note 6) 1.0 1.5 m a reverse supply voltage i s = 10 m a per amplifier C18 v sr slew rate a v = C1, v s = 5v 0.4 1.0 v/ms gbw gain bandwidth product f = 100hz 2.7 khz electrical characteristics t a = 25 c, v s = 5v, 0v; v s = 3v, 0v; v cm = v o = half supply, unless otherwise noted. downloaded from: http:///
4 lt1494/lt1495/lt1496 symbol parameter conditions min typ max units v os input offset voltage v s = 5v 200 475 m v v s = 3v 250 575 m v v s = 5v, ms8 package 200 575 m v v s = 3v, ms8 package 250 675 m v v os tc input offset voltage drift (note 4) 0.4 2 m v/ c i b input bias current (note 5) 250 1700 pa v cm = 10v (note 6) 275 na i os input offset current (note 5) 20 170 pa a vol large-signal voltage gain v s = 5v, v o = 0.25v to 4.5v, r l = 100k 55 215 v/mv v s = 3v, v o = 0.25v to 2.5v, r l = 100k 30 115 v/mv input voltage range 0.2 36 v cmrr common mode rejection ratio v cm = 0.2v to 4v, v s = 5v 88 106 db v cm = 0.2v to 10v, v s = 5v 75 db psrr power supply rejection ratio v s = 2.7v to 12v, v cm = v o = 0.5v 88 99 db minimum operating supply voltage 2.6 2.7 v v ol output voltage swing low no load 60 120 mv i sink = 100 m a 245 490 mv v oh output voltage swing high no load v + C 0.10 v + C 0.05 mv i source = 100 m a v + C 0.38 v + C 0.19 mv i sc short-circuit current (note 5) 0.4 0.9 ma i s supply current per amplifier (note 6) 1.5 2.3 m a electrical characteristics the denotes the specifications which apply over the temperature range of 40 c t a 85 c, v s = 5v, 0v; v s = 3v, 0v; v cm = v o = half supply, unless otherwise noted. (note 3) the denotes the specifications which apply over the temperature range of 0 c t a 70 c, v s = 5v, 0v; v s = 3v, 0v; v cm = v o = half supply, unless otherwise noted. (note 3) symbol parameter conditions min typ max units v os input offset voltage v s = 5v 175 425 m v v s = 3v 225 525 m v v s = 5v, ms8 package 175 525 m v v s = 3v, ms8 package 225 625 m v v os tc input offset voltage drift (note 4) 0.4 2 m v/ c i b input bias current (note 5) 250 1200 pa v cm = 10v (note 6) 240 500 na i os input offset current (note 5) 20 120 pa a vol large-signal voltage gain v s = 5v, v o = 0.25v to 4.5v, r l = 100k 75 280 v/mv v s = 3v, v o = 0.25v to 2.5v, r l = 100k 40 150 v/mv input voltage range 0.2 36 v cmrr common mode rejection ratio v cm = 0.2v to 4v, v s = 5v 89 106 db v cm = 0.2v to 10v, v s = 5v 64 85 db psrr power supply rejection ratio v s = 2.4v to 12v, v cm = v o = 0.5v 89 99 db minimum operating supply voltage 2.3 2.4 v v ol output voltage swing low no load 55 110 mv i sink = 100 m a 225 450 mv v oh output voltage swing high no load v + C 0.08 v + C 0.04 v i source = 100 m a v + C 0.36 v + C 0.18 v i sc short-circuit current (note 5) 0.6 1.1 ma i s supply current per amplifier (note 6) 1.2 1.8 m a downloaded from: http:///
5 lt1494/lt1495/lt1496 electrical characteristics t a = 25 c, v s = 15v, v cm = v o = 0v, unless otherwise noted. symbol parameter conditions min typ max units v os input offset voltage 200 575 m v ms8 package 200 675 m v i b input bias current 25 1000 pa i os input offset current 20 100 pa a vol large-signal voltage gain v o = 10v, r l = 100k 100 360 v/mv input voltage range C 15 21 v cmrr common mode rejection ratio v cm = C 15v to 14v 100 120 db psrr power supply rejection ratio v s = 5v to 15v 96 120 db v ol output voltage swing low r l = 1m C14.85 C14.70 v r l = 100k C14.75 C14.50 v v oh output voltage swing high r l = 1m 14.78 14.89 v r l = 100k 14.62 14.81 v i sc short-circuit current 0.7 1.5 ma i s supply current per amplifier 1.4 2.0 m a lt1494h/lt1495h/lt1496h symbol parameter conditions min typ max units v os input offset voltage v s = 5v 225 875 m v v s = 3v 275 975 m v v os tc input offset voltage drift (note 4) 0.4 3 m v/ c i b input bias current (note 5) 3.8 10 na v cm = 10v (note 6) 0.300 2 m a i os input offset current (note 5) 0.3 2 na a vol large-signal voltage gain v s = 5v, v o = 0.25v to 4.5v, r l = 100k 42 5 v / m v v s = 3v, v o = 0.25v to 2.5v, r l = 100k 21 7 v / m v input voltage range 0.5 36 v cmrr common mode rejection ratio v cm = 0.5v to 4v, v s = 5v 72 95 db v cm = 0.5v to 10v, v s = 5v 85 db psrr power supply rejection ratio v s = 2.7v to 12v, v cm = v o = 0.5v 86 105 db minimum operating supply voltage 2.7 v v ol output voltage swing low no load 70 160 mv i sink = 100 m a 275 550 mv v oh output voltage swing high no load v + C 140 v + C 45 mv i source = 100 m a v + C 450 v + C 225 mv i s supply current per amplifier (note 6) 25 m a the denotes the specifications which apply over the temperature range of 40 c t a 125 c. v s = 5v, 0v; v s = 3v, 0v; v cm = v o = half supply, unless otherwise noted. (note 3) downloaded from: http:///
6 lt1494/lt1495/lt1496 symbol parameter conditions min typ max units v os input offset voltage 250 675 m v ms8 package 250 775 m v i b input bias current 250 1700 pa i os input offset current 20 170 pa a vol large-signal voltage gain v o = 10v, r l = 100k 50 200 v/mv input voltage range C 14.8 21 v cmrr common mode rejection ratio v cm = C14.8v to 14v 96 114 db psrr power supply rejection ratio v s = 5v to 15v 92 120 db v ol output voltage swing low r l = 1m C14.83 C14.66 v r l = 100k C14.72 C14.44 v v oh output voltage swing high r l = 1m 14.74 14.87 v r l = 100k 14.54 14.77 v i sc short-circuit current 0.4 1.1 ma i s supply current per amplifier 2.0 3.0 m a the denotes the specifications which apply over the temperature range of 0 c t a 70 c, v s = 15v, v cm = v o = 0v, unless otherwise noted. (note 3) symbol parameter conditions min typ max units v os input offset voltage 225 625 m v ms8 package 225 725 m v i b input bias current 250 1200 pa i os input offset current 20 120 pa a vol large-signal voltage gain v o = 10v, r l = 100k 60 240 v/mv input voltage range C 14.8 21 v cmrr common mode rejection ratio v cm = C14.8v to 14v 98 120 db psrr power supply rejection ratio v s = 5v to 15v 94 120 db v ol output voltage swing low r l = 1m C14.84 C14.67 v r l = 100k C14.73 C14.46 v v oh output voltage swing high r l = 1m 14.76 14.88 v r l = 100k 14.58 14.79 v i sc short-circuit current 0.6 1.3 ma i s supply current per amplifier 1.6 2.4 m a the denotes the specifications which apply over the temperature range of 40 c t a 85 c, v s = 15v, v cm = v o = 0v, unless otherwise noted. (note 3) electrical characteristics downloaded from: http:///
7 lt1494/lt1495/lt1496 lt1494h/lt1495h/lt1496h symbol parameter conditions min typ max units v os input offset voltage 275 1100 m v i b input bias current 3.8 10 na i os input offset current 0.3 2 na a vol large-signal voltage gain v o = 10v, r l = 100k 21 70 v/mv input voltage range C14.5 21 v cmrr common mode rejection ratio v cm = C14.5v to 14v 69 90 db psrr power supply rejection ratio v s = 5v to 15v 89 115 db v ol output voltage swing low r l = 1m C14.80 C14.4 v r l = 100k C14.69 C14.2 v v oh output voltage swing high r l = 1m 14.5 14.85 v r l = 100k 14.3 14.73 v i s supply current per amplifier 36 m a electrical characteristics C40 c to 85 c but are not tested or qa sampled at these temperatures. the lt1494i/lt1495i/lt1496i are guaranteed to meet specified performance from C40 c to 85 c. the lt1494h/lt1495h/lt1496h are guaranteed to meet specified performance from C40 c to 125 c. note 4: this parameter is not 100% tested. note 5: v s = 5v limits are guaranteed by correlation to v s = 3v and v s = 15v tests. note 6: v s = 3v limits are guaranteed by correlation to v s = 5v and v s = 15v tests. note 1: absolute maximum ratings are those values beyond which the life of the device may be impaired.note 2: the lt1494c/lt1495c/lt1496c and lt1494i/lt1495i/lt1496i are guaranteed functional over the operating temperature range of C 40 c to 85 c. the lt1494h/lt1495h/lt1496h are guaranteed functional over the operating temperature range of C40 c to 125 c. note 3: the lt1494c/lt1495c/lt1496c are guaranteed to meet specified performance from 0 c to 70 c. the lt1494c/lt1495c/lt1496c are designed, characterized and expected to meet specified performance from typical perfor m a n ce characteristics u w input offset voltage ( m v) C 400 0 percent of units (%) 2 6 8 10 2014 C 200 0 100 1495 g01 4 16 18 12 C 300 C100 200 300 400 v s = 5v, 0v lt1494/lt1495/ lt1496 5700 op amps distribution of input offset voltage total supply voltage (v) 1 change in offset voltage ( m v) 100 150 200 5 1495 g03 50 C50 0 2 3 4 t a = 85 c t a = C 40 c t a = 25 c temperature ( c) C40 C20 0 supply current per amplifier ( m a) 1.0 2.5 0 40 60 1495 g02 0.5 2.0 1.5 20 80 100 v s = 15v v s = 2.5v supply current vs temperature minimum supply voltage the denotes the specifications which apply over the temperature range of 40 c t a 125 c. v s = 15v, v cm = v o = half supply, unless otherwise noted. (note 3) downloaded from: http:///
8 lt1494/lt1495/lt1496 typical perfor m a n ce characteristics u w output saturation voltagevs load current (output low) load current ( m a) 0.1 10 saturation voltage (mv) 100 1000 10 1 1000 100 1495 g04 v s = 5v, 0v t a = 85 c t a = C 40 c t a = 25 c input bias currentvs common mode voltage common mode voltage (v) 0 input bias current (na) 100 200 300 8 1495 g06 1.50.5 C 0.5 2 4 6 1 C1 9 3 5 7 10 v s = 5v, 0v t a = 85 c t a = 85 c t a = 25 c t a = C 40 c t a = C 40 c t a = 25 c output saturation voltagevs load current (output high) load current ( m a) 0.1 10 saturation voltage (mv) 100 1000 10 1 1000 100 1495 g05 v s = 5v, 0v t a = 85 c t a = C 40 c t a = 25 c noise current spectrum frequency (hz) 1 0 current noise (fa/ ? hz) 20 40 60 80 10 100 1495 g09 100 v s = 2.5v 0.1hz to 10hzoutput voltage noise time (1s/div) output voltage (2 m v/div) 1495 g07 v s = 15v v cm = 0v gain and phase shiftvs frequency frequency (khz) 0.1 C30 voltage gain (db) phase shift (deg) C20 C10 0 10 50 11 0 1495 g10 20 30 40 C40 C20 0 20 40 120 60 80 100 phase gain v s = 2.5v noise voltage spectrum frequency (hz) 1 0 noise voltage (nv/ ? hz) 50 100 150 200 300 10 100 1495 g08 250 v s = 2.5v gain bandwidth and phasemargin vs supply voltage supply voltage (v) 0 2.0 2.5 3.0 15 25 1495 g11 1.51.0 51 0 20 30 0.5 0 frequency (khz) phase margin (deg) 3.5 40 50 60 3020 10 0 70 phase margin gbw capacitive load (pf) 20 overshoot (%) 40 50 70 80 10 1000 10000 100000 1495 g12 0 100 6030 10 v s = 2.5v a v = 1 a v = 5 a v = 10 capacitive load handling downloaded from: http:///
9 lt1494/lt1495/lt1496 typical perfor m a n ce characteristics u w frequency (khz) 1 output impedance (k w ) 10 100 1000 0.01 1 10 1495 g15 0.1 0.1 a v = 10 a v = 1 frequency (khz) 0.01 40 power supply rejection ratio (db) 50 60 70 80 0.1 1 10 1495 g14 30 2010 0 90 100 v s = 2.5v positivesupply negative supply power supply rejection ratiovs frequency common mode rejection ratiovs frequency frequency (khz) 0.01 40 common mode rejection ratio (db) 50 60 70 80 0.1 1 10 1495 g13 30 2010 0 90 100 v s = 2.5v warm-up drift vs time time after power-up (sec) 0 offset voltage change ( m v) 4020 3010 0 C10 C20 C30 C 40 160 1495 g16 40 80 120 200 140 20 60 100 180 v s = 15v v s = 2.5v open-loop gainv s = 5v, 0v output voltage (v) 0 offset voltage change ( m v) C5 0 5 3 5 1495 g17 C10 C15 C20 12 4 10 15 20 6 v s = 5v, 0v r l = 1m r l = 100k open-loop gainv s = 15v output voltage (v) C20 C15 offset voltage change ( m v) 0 40 20 1495 g18 C40 C80 C10 C5 0 5 15 10 80 C20 20 C60 60 r l = 100k v s = 15v r l = 1m small-signal responsev s = 15v v s = 15v r l = 1m c l = 100pf 1495 g19 small-signal responsev s = 5v, 0v v s = 5v, 0v r l = 1m c l = 100pf 1495 g20 large-signal responsev s = 5v, 0v v s = 5v, 0v r l = 1m c l = 100pf 1495 g21 output impedance vs frequency downloaded from: http:///
10 lt1494/lt1495/lt1496 applicatio n s i n for m atio n wu u u start-up characteristics micropower op amps are sometimes not micropowerduring start-up, wreaking havoc on low current supplies. in the worst case, there may not be enough supply current available to take the system up to nominal voltages. figure 1 is a graph of lt1495 supply current vs supply voltage for the three limit cases of input offset that could occur during start-up. the circuits are shown in figure 2. one circuit creates a positive offset, forcing the output to come up saturated high. another circuit creates a negative offset, forcing the output to come up saturated low, while the last brings up the output at half supply. in all cases, the supply current is well behaved. supply current is highest with the output forced high, so if one amplifier is unused, it is best to force the output low or at half supply. reverse battery the lt1494/lt1495/lt1496 are protected against reversebattery voltages up to 18v. in the event a reverse battery condition occurs, the supply current is typically less than 100na (inputs grounded and outputs open). for typical single supply applications with ground referred loads and feedback networks, no other precautions are required. if the reverse battery condition results in a negative voltage at either the input pins or output pin, the current into the pin should be limited by an external resistor to less than 10ma. inputs while the lt1494/lt1495/lt1496 will function normallywith its inputs taken above the positive supply, the com- mon mode range does not extend beyond approximately 300mv below the negative supply at room temperature. the device will not be damaged if the inputs are taken lower than 300mv below the negative supply as long as the cur- rent out of the pin is limited to less than 10ma. however, the output phase is not guaranteed and the supply current will increase. output the graph, capacitive load handling, shows amplifier sta-bility with the output biased at half supply. if the output is to be operated within about 100mv of the positive rail, the allowable load capacitance is less. with this output volt- age, the worst case occurs at a v = 1 and light loads, where the load capacitance should be less than 500pf with a 5vsupply and less than 100pf with a 30v supply. rail-to-rail operationthe simplified schematic, figure 3, details the circuit design approach of the lt1494/lt1495/lt1496. the amplifier topology is a three-stage design consisting of a rail-to-rail input stage, that continues to operate with the inputs above the positive rail, a folded cascode second stage that develops most of the voltage gain, and a rail-to- rail common emitter stage that provides the current gain. figure 1. start-up characteristics 1495 f02 output high v s C + output at v s /2 v s C + output low v s C + v s /2 figure 2. circuits for start-up characteristics supply voltage (v) 0 54 3 2 1 supply current per amplifier ( m a) 5 1495 f01 01234 output high output low output v s /2 downloaded from: http:///
11 lt1494/lt1495/lt1496 applicatio n s i n for m atio n wu u u figure 3. simplified schematic the input stage is formed by two diff amps q1-q2 and q3-q6. for signals with a common mode voltage between v ee and (v cc C 0.8v), q1 and q2 are active. when the input common mode exceeds (v cc C 0.8v), q7 turns on, diverting the current from diff amp q1-q2 to currentmirror q8-q9. the current from q8 biases on the other diff amp consisting of pnps q5-q6 and npns q3-q4. though q5-q6 are driven from the emitters rather than the base, the basic diff amp action is the same. when the common mode voltage is between (v cc C 0.8v) and v cc , devices q3 and q4 act as followers, forming a buffer between theamplifier inputs and the emitters of the q5-q6. if the common mode voltage is taken above v cc , schottky diodes d1 and d2 reverse bias and devices q3 and q4 then act as diodes. the diff amp formed by q5-q6 operatesnormally, however, the input bias current increases to the emitter current of q5-q6, which is typically 180na. the graph, input bias current vs common mode voltage found in the typical performance characteristics section, shows these transitions at three temperatures. the collector currents of the two-input pairs are combinedin the second stage consisting of q11 to q16, which furnishes most of the voltage gain. capacitor c1 sets the amplifier bandwidth. the output stage is configured for maximum swing by the use of common emitter output devices q21 and q22. diodes d4 to d6 and current source q15 set the output quiescent current. + + 1495 f03 0.5 q6 q4 q16 q17 (v + ) C 0.8v q19 q18 q22 c1 d1 d2 v + d3 q3 q11 q2 q7 in C in + q10 q13 q20 q21 out q12 q14 q15 q5 0.5 0.50.5 q8 r1 r2 i 2 + i 1 d6 d5 d4 d7 q9 q1 downloaded from: http:///
12 lt1494/lt1495/lt1496 typical applicatio n s n u 13 m a, 0khz to 10khz voltage to frequency converter C + 1/2 lt1495 C + 1/2 lt1495 5v 5v 1.2reference ltc1440 0v C 2.5v = 0khz C 10khzsupply current = 6.2 m a quiescent = 13.3 m a at f = 10khz linearity: 0.03% psrr (4.4v to 36v): 10ppm/vtemperature drift: 250ppm/ c 1 m f 0.0082 m f 1n57121n4148 q1: ztx-849*1% metal film ? polystyrene 360k 100k 562k* v in 0v to 2.5v 3.9m 270k 10m* 390 w 12pf output 0khz to 10khz 3.6m typ select for 100hz at v in = 0.025v 3.9m* 20m + C + ltc ? 1440 100pf ? 0.05 m f 39k 10m 1495 ta07 q1 15k C + 1/2 lt1495 C + 1/2 lt1495 10m 1 m f 5v C5v 5v C5v f 2 f 1 f 2 f 1 10k 10m gain: 1000offset: 1 m v drift: 50nv/ c supply current: 5.5 m a bandwidth: 0.2hzclock rate: 4hz output 10k 1m 1495 ta08 1m 1 m f input f 1 f 2 0.2 m f C + 1/2 ltc1441 C + 1/2 ltc1441 10m 10m 10m 0.047 m f cd4016 quad 6 m a, a v = 1000, chopper stabilized amplifier downloaded from: http:///
13 lt1494/lt1495/lt1496 package descriptio n u 6th order 10hz elliptic lowpass filter filter frequency response frequency (hz) 1 gain (db) 0 C10 C20 C30 C40 C50 C60 1000 lt1495/96 ? ta04 10 100 C + 1/2 lt1495 C + 1/2 lt1495 200k 100k 10k 10nf 100k 100nf 215k 215k 215k 15nf 15nf 30nf e in 200k 80.6k 10nf 100k 100nf 169k 169k 169k 15nf 15nf 30nf 1495 ta03 v s = 5v, 0v i s = 2 a + e in /150k zeros at 50hz and 60hz output 100nf 10k 100nf typical applicatio n s n u msop (ms8) 1100 * dimension does not include mold flash, protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.006" (0.152mm) per side ** dimension does not include interlead flash or protrusions. interlead flash or protrusions shall not exceed 0.006" (0.152mm) per side 0.021 0.006 (0.53 0.015) 0 C 6 typ seating plane 0.007 (0.18) 0.043 (1.10) max 0.009 C 0.015 (0.22 C 0.38) 0.005 0.002 (0.13 0.05) 0.034 (0.86) ref 0.0256 (0.65) bsc 12 3 4 0.193 0.006 (4.90 0.15) 8 7 6 5 0.118 0.004* (3.00 0.102) 0.118 0.004** (3.00 0.102) ms8 package 8-lead plastic msop (reference ltc dwg # 05-08-1660) downloaded from: http:///
14 lt1494/lt1495/lt1496 package descriptio n u s8 package 8-lead plastic small outline (narrow .150 inch) (reference ltc dwg # 05-08-1610) n8 package 8-lead pdip (narrow .300 inch) (reference ltc dwg # 05-08-1510) n8 1098 0.100 (2.54) bsc 0.065 (1.651) typ 0.045 C 0.065 (1.143 C 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 C 0.015 (0.229 C 0.381) 0.300 C 0.325 (7.620 C 8.255) 0.325 +0.035 C0.015 +0.889 C0.381 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 C 0.050 (0.406 C 1.270) 0.010 C 0.020 (0.254 C 0.508) 45 0 C 8 typ 0.008 C 0.010 (0.203 C 0.254) so8 1298 0.053 C 0.069 (1.346 C 1.752) 0.014 C 0.019 (0.355 C 0.483) typ 0.004 C 0.010 (0.101 C 0.254) 0.050 (1.270) bsc 1 2 3 4 0.150 C 0.157** (3.810 C 3.988) 8 7 6 5 0.189 C 0.197* (4.801 C 5.004) 0.228 C 0.244 (5.791 C 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 * ** downloaded from: http:///
15 lt1494/lt1495/lt1496 package descriptio n u 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. s package 14-lead plastic small outline (narrow .150 inch) (reference ltc dwg # 05-08-1610) n package 14-lead pdip (narrow .300 inch) (reference ltc dwg # 05-08-1510) 1 2 3 4 0.150 C 0.157** (3.810 C 3.988) 14 13 0.337 C 0.344* (8.560 C 8.738) 0.228 C 0.244 (5.791 C 6.197) 12 11 10 9 5 6 7 8 0.016 C 0.050 (0.406 C 1.270) 0.010 C 0.020 (0.254 C 0.508) 45 0 C 8 typ 0.008 C 0.010 (0.203 C 0.254) s14 1298 0.053 C 0.069 (1.346 C 1.752) 0.014 C 0.019 (0.355 C 0.483) typ 0.004 C 0.010 (0.101 C 0.254) 0.050 (1.270) bsc dimension does not include mold flash. mold flash shall not exceed 0.006" (0.152mm) per side dimension does not include interlead flash. interlead flash shall not exceed 0.010" (0.254mm) per side * ** n14 1098 0.020 (0.508) min 0.125 (3.175) min 0.130 0.005 (3.302 0.127) 0.045 C 0.065 (1.143 C 1.651) 0.065 (1.651) typ 0.018 0.003 (0.457 0.076) 0.100 (2.54) bsc 0.005 (0.125) min 0.255 0.015* (6.477 0.381) 0.770* (19.558) max 3 1 2 4 5 6 7 8 9 10 11 12 13 14 0.009 C 0.015 (0.229 C 0.381) 0.300 C 0.325 (7.620 C 8.255) 0.325 +0.035 C0.015 +0.889 C0.381 8.255 () *these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed 0.010 inch (0.254mm) downloaded from: http:///
16 lt1494/lt1495/lt1496 ? linear technology corporation 1997 149456fb lt/tp 0801 1.5k rev b ? printed in usa linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax: (408) 434-0507 telex: 499-3977 www.linear.com battery current monitor 0na to 200na current meter typical applicatio n s n u related parts C + C + 1495 ta05 r sense 0.1 w i l charge r a 2n3904 v o = i l r sense for r a = 1k, r b = 10k = 1v/a charge out dischargeout discharge 2n3904 r a r a r a r b r b r a v o i l r b a1 1/2 lt1495 5v 12v a2 1/2 lt1495 () C + C + m a 1495 ta06 1/2 lt1495 1/2 lt1495 100pf r1 10m r29k 1.5v1.5v r32k full-scale adjust i s = 3 m a when i in = 0 no on/off switch required 0 m a to 200 m a r4 10k input current high side current sense part number description comments ltc ? 1440/41/42 micropower single/dual comparators with 1% reference ltc1440: single, ltc1441/42: dual ltc1443/44/45 micropower quad comparators with 1% reference ltc1443: 1.182 reference ltc1444/45: 1.221v reference and adjustable hysteresis lt1466/lt1467 75 m a dual/quad rail-to-rail input and output op amps 390 m v v os(max) , gain bandwidth = 120khz lt1490a/lt1491a 50 m a dual/quad rail-to-rail input and output op amps 950 m v v os(max) , gain bandwidth = 200khz ltc1540 nanopower single comparator with 1% reference 350na supply current lt1636 single over-the-top micropower, 225 m v v os(max) , i s = 55 m a (max), gain-bandwidth = 200khz rail-to-rail input and output op amp shutdown pin, msop lt1672/lt1673/lt1674 2 m a max, a v 3 5 single/dual/quad over-the-top precision decompensated version of the lt1494/lt1495/lt1496 rail-to-rail input and output op amps a v 3 5, gain-bandwidth = 12khz lt2078/lt2079 55 m a dual/quad single supply op amps 120 m v v os(max) , gain bandwidth = 200khz lt2178/lt2179 17 m a dual/quad single supply op amps 120 m v v os(max) , gain bandwidth = 60khz lt1782 micropower, over-the-top, sot-23, rail-to-rail sot-23, 800 m v v os(max) , i s = 55 m a (max), input and output op amp gain-bandwidth = 200khz, shutdown pin lt1783 1.2mhz, over-the-top, micropower, rail-to-rail sot-23, 800 m v v os(max) , i s = 300 m a (max), input and output op amp in sot-23 gain-bandwidth = 1.2mhz, shutdown pin + C lt1494 r a 1k r sense 1 load i l v s = 2.7v to 36v 1495 ta09 r b 10k + _ v o ( ) r b r a v o = i l r s for r a = 1k, r b = 10k, r s = 1 = 10 v/aoutput offset ? i s ? r b ? 10mv output clips at v s C 2.4v v o i l downloaded from: http:///

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