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LT6000/lt6001/lt6002 1 600012fa applicatio s u typical applicatio u features descriptio u gas sensing portable instrumentation battery- or solar-powered systems low voltage signal processing micropower active filters ideal for battery-powered applications ?low voltage: 1.8v to 16v operation ?low current: 16 a/amplifier max ?small packages: dfn, msop, ssop ?shutdown to 1.5 a max (LT6000, lt6001dd) low offset voltage: 600 v max rail-to-rail input and output fully specified on 1.8v and 5v supplies operating temperature range: C40 c to 85 c single available in dfn dual available in msop and dfn quad available in ssop and dfn single, dual and quad, 1.8v, 13 a precision rail-to-rail op amps , ltc and lt are registered trademarks of linear technology corporation. all other trademarks are the property of their respective owners. the lt ? 6000/lt6001/lt6002 are single, dual and quad precision rail-to-rail input and output operational amplifi- ers. designed to maximize battery life in always-on appli- cations, the devices will operate on supplies down to 1.8v while drawing only 13 a quiescient current. the low supply current and low voltage operation is combined with precision specifications; input offset is guaranteed less than 600 v. the performance on 1.8v supplies is fully specified and guaranteed over temperature. a shutdown feature available in the LT6000 and the 10-lead dual lt6001 version can be used to extend battery life by allowing the amplifiers to be switched off during periods of inactivity. the LT6000 is available in a tiny, dual fine pitch leadless dfn package. the lt6001 is available in the 8-pin msop package; a 10-lead version with the shutdown feature is available in dfn package. the quad lt6002 is available in the 16-pin ssop package and the 16-pin dfn package. these devices are specified over the commercial and industrial temperature range. C + Cv e 100 ? 330 ? v out = 1v in air, 0v without oxygen 330 ? + C 10k oxygen sensor city technology 40x(2) www.citytech.com +v e 1/2 lt6001 200k v s = 1.8v i supply = 145 a in air, 45 a without oxygen v s v s 20k 60012 ta01a C + 1/2 lt6001 micropower oxygen sensor start-up characteristics supply current vs supply voltage total supply voltage (v) 0.4 0 supply current per amplifier ( a) 10 25 0.8 1.2 1.4 60012 ta01b 5 20 15 0.6 1.0 1.6 1.8 2.0 a v = 1 v cm = 0.5v t a = 125 c t a = 25 c t a = C55 c
LT6000/lt6001/lt6002 600012fa 2 dcb part marking* absolute axi u rati gs w ww u (note 1) total supply voltage (v + to v C ) .............................. 18v input current ..................................................... 10ma shdn pin voltage (note 7) ............................... v C to v + output short current duration (note 2) ......... indefinite operating temperature range (note 3) ... C40 c to 85 c specified temperature range (note 4) .... C40 c to 85 c junction temperature ........................................... 150 c junction temperature (dfn packages) ................ 125 c storage temperature range .................. C65 c to 150 c storage temperature range dfn packages ................................... C65 c to 125 c lead temperature (soldering, 10 sec) msop, ssop packages .................................... 300 c package/order i for atio uu w order part number LT6000cdcb LT6000idcb top view 11 dd package 10-lead (3mm 3mm) plastic dfn 10 9 6 7 8 4 5 3 2 1 v + out b in C b in + b shdn out a in C a in + a vC nc t jmax = 125 c, ja = 160 c/w (note 2) exposed pad (pin 11) is connected to v C (pin 4) lt6001cms8 lt6001ims8 lt6001cdd lt6001idd ltbvd ltbvd t jmax = 150 c, ja = 250 c/w 1 2 3 4 out a in C a in + a v C 8 7 6 5 v + out b in C b in + b top view ms8 package 8-lead plastic msop C + C + lcdm lcdm lbvh lbvh top view v + v C out shdn Cin +in dcb package 6-lead (2mm 3mm) plastic dfn 4 5 7 6 3 2 1 t jmax = 125 c, ja = 160 c/w (note 2) exposed pad (pin 7) is connected to v C (pin 5) ms8 part marking* order part number dd part marking* order part number order part number lt6002cgn lt6002ign order part number dhc part marking* lt6002cdhc lt6002idhc gn part marking 6002 6002i t jmax = 125 c, ja = 160 c/w (note 2) exposed pad (pin 17) is connected to v C (pin 13) 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 top view 17 dhc package 16-lead (5mm 3mm) dfn out a in C a in + a v + in + b in C b out b nc out d in C d in + d v C in + c in C c out c nc ad bc 1 2 3 4 5 6 7 8 top view gn package 16-lead narrow plastic ssop 16 15 14 13 12 11 10 9 out a in C a in + a v + in + b in C b out b nc out d in C d in + d v C in + c in C c out c nc + C + C C + C + ad bc t jmax = 150 c, ja = 135 c/w 6002 6002 *temperature grades are identified on the shipping container. consult ltc marketing for parts specified with wider operating temperature ranges. order options tape and reel: add #tr lead free: add #pbf lead free tape and reel: add #trpbf lead free part marking: http://www.linear.com/leadfree/
LT6000/lt6001/lt6002 3 600012fa symbol parameter conditions min typ max units v os input offset voltage lt6001ms8 200 600 v 0 c t a 70 c 800 v C40 c t a 85 c 950 v LT6000dcb, lt6001dd, lt6002gn 250 750 v 0 c t a 70 c 1000 v C40 c t a 85 c 1200 v lt6002dhc 300 900 v 0 c t a 70 c 1100 v C40 c t a 85 c 1300 v v cm = v + lt6001ms8 400 1000 v 1300 v v cm = v + LT6000dcb, lt6001dd, lt6002gn 500 1200 v 1550 v v cm = v + lt6002dhc 500 1300 v 1700 v ? v os / ? t input offset voltage drift (note 5) v cm = 0.5v 25 v/ c i b input bias current v cm = 0.5v C5 C2 na v cm = v C C5 C2 na v cm = v + 4 10 na i os input offset current v cm = 0.5v 0.2 1 na v cm = v C 0.2 1 na v cm = v + 0.4 2 na input noise voltage 0.1hz to 10hz 1.2 v p-p e n input voltage noise density f = 1khz 75 nv/ hz i n input current noise density f = 1khz 25 fa/ hz r in input resistance common mode (v cm = 0v to 0.6v) 3.5 g ? differential 10 25 m ? c in input capacitance 5pf cmrr common mode rejection ratio v cm = 0v to 0.6v, 0 c t a 70 c 82 96 db v cm = 0.1v to 0.6v, C40 c t a 85 c 82 96 db v cm = 0v to 1.8v 60 78 db input voltage range 0 1.8 v psrr power supply rejection ratio v s = 1.8v to 16v 86 100 db v cm = v o = 0.5v minimum supply v cm = v o = 0.5v 1.8 v a vol large-signal gain v o = 0.25v to 1.25v r l = 100k to gnd 25 65 v/mv r l = 100k to gnd 20 v/mv r l = 10k to gnd 40 125 v/mv r l = 10k to gnd 25 v/mv v ol output swing low (note 6) input overdrive = 30mv no load 30 60 mv i sink = 100 a 120 200 mv v oh output swing high (note 6) input overdrive = 30mv no load 30 60 mv i source = 100 a 140 225 mv r l = 10k to gnd 160 250 mv electrical characteristics the denotes specifications which apply over the full specified temperature range, otherwise specifications are t a = 25 c. v s = 1.8v, 0v, v cm = v out = 0.5v. for the LT6000 and the lt6001dd, v shdn = v + , unless otherwise noted.
LT6000/lt6001/lt6002 600012fa 4 electrical characteristics the denotes specifications which apply over the full specified temperature range, otherwise specifications are t a = 25 c. v s = 1.8v, 0v, v cm = v out = 0.5v. for the LT6000 and the lt6001dd, v shdn = v + , unless otherwise noted. i sc short-circuit current short to gnd 2 4 ma 0 c t a 70 c 1ma C40 c t a 85 c 0.4 ma short to v + 0.7 2 ma 0 c t a 70 c 0.4 ma C40 c t a 85 c 0.15 ma i s supply current per amplifier 13 16 a 0 c t a 70 c 22 a C40 c t a 85 c 24 a total supply current in shutdown (note 7) v shdn = 0.3v 0.8 1.5 a i shdn shdn pin current (note 7) v shdn = 1.8v 030 na v shdn = 0v C300 C200 na shutdown output leakage current (note 7) v shdn = 0.3v (v C v out v + ) 20 na v l shdn pin input low voltage (note 7) 0.3 v v h shdn pin input high voltage (note 7) 1.5v v t on turn on time (note 7) v shdn = 0v to 1.8v, 400 s r l = 10k t off turn off time (note 7) v shdn = 1.8v to 0v, 100 s r l = 10k gbw gain bandwidth product (note 8) freq = 1khz 32 50 khz 0 c t a 70 c 28 khz C40 c t a 85 c 24 khz sr slew rate a v = C1, v out = 0.25v to 1.5v 9 15 v/ms measure 0.5v to 1.25v, 0 c t a 70 c 7 v/ms C40 c t a 85 c 5 v/ms fpbw full power bandwidth (note 9) v out = 1.25v p-p 2.3 3.8 khz symbol parameter conditions min typ max units
LT6000/lt6001/lt6002 5 600012fa symbol parameter conditions min typ max units v os input offset voltage lt6001ms8 200 600 v 0 c t a 70 c 800 v C40 c t a 85 c 950 v LT6000dcb, lt6001dd, lt6002gn 250 750 v 0 c t a 70 c 1000 v C40 c t a 85 c 1200 v lt6002dhc 300 900 v 0 c t a 70 c 1100 v C40 c t a 85 c 1300 v v cm = v + lt6001ms8 400 1000 v 1300 v v cm = v + LT6000dcb, lt6001dd, lt6002gn 500 1200 v 1550 v v cm = v + lt6002dhc 500 1300 v 1700 v ? v os / ? t input offset voltage drift (note 5) v cm = v s /2 25 v/ c i b input bias current v cm = v s /2 C6 C2 na v cm = v C C6 C2 na v cm = v + 4 12 na i os input offset current v cm = v s /2 0.2 1.2 na v cm = v C 0.2 1.2 na v cm = v + 0.4 2.4 na input noise voltage 0.1hz to 10hz 1.2 v p-p e n input voltage noise density f = 1khz 75 nv/ hz i n input current noise density f = 1khz 25 fa/ hz r in input resistance common mode (v cm = 0v to 3.8v) 3.5 g ? differential 8.5 25 m ? c in input capacitance 5pf cmrr common mode rejection ratio v cm = 0v to 3.8v, 0 c t a 70 c 90 105 db v cm = 0.1v to 3.8v, C40 c t a 85 c 90 105 db v cm = 0v to 5v 68 86 db input voltage range 05v psrr power supply rejection ratio v s = 1.8v to 16v 86 100 db v cm = v o = 0.5v minimum supply 1.8 v a vol large-signal gain v o = 0.5v to 4.5v r l = 100k to v s /2 30 60 v/mv r l = 100k to v s /2 25 v/mv r l = 10k to v s /2 16 25 v/mv r l = 10k to v s /2 10 v/mv r l = 10k to gnd 160 1000 v/mv r l = 10k to gnd 80 v/mv v ol output swing low (note 6) input overdrive = 30mv no load 30 60 mv i sink = 100 a 120 200 mv i sink = 500 a 180 300 mv electrical characteristics the denotes specifications which apply over the full specified temperature range, otherwise specifications are t a = 25 c. v s = 5v, 0v, v cm = v out = 1/2 supply. for the LT6000 and the lt6001dd, v shdn = v + , unless otherwise noted.
LT6000/lt6001/lt6002 600012fa 6 electrical characteristics the denotes specifications which apply over the full specified temperature range, otherwise specifications are t a = 25 c. v s = 5v, 0v, v cm = v out = 1/2 supply. for the LT6000 and the lt6001dd, v shdn = v + , unless otherwise noted. symbol parameter conditions min typ max units v oh output swing high (note 6) input overdrive = 30mv no load 30 60 mv i source = 100 a 140 225 mv r l = 10k to gnd 160 400 mv i sc short-circuit current short to gnd 5 10 ma 0 c t a 70 c 4ma C40 c t a 85 c 3ma short to v + 3.5 7.5 ma 0 c t a 70 c 2.5 ma C40 c t a 85 c 1.5 ma i s supply current per amplifier 15 18 a 0 c t a 70 c 24 a C40 c t a 85 c 27 a v s = 8v 20 25 a 34 a total supply current in shutdown (note 7) v shdn = 0.3v 35 a i shdn shdn pin current (note 7) v shdn = 5v 030 na v shdn = 0v C1000 C650 na shutdown output leakage current (note 7) v shdn = 0.3v (v C v out v + ) 20 na v l shdn pin input low voltage (note 7) 0.3 v v h shdn pin input high voltage (note 7) 4.7 v t on turn on time (note 7) v shdn = 0v to 5v, r l = 10k 400 s t off turn off time (note 7) v shdn = 5v to 0v, r l = 10k 100 s gbw gain bandwidth product freq = 1khz 40 60 khz 0 c t a 70 c 35 khz C40 c t a 85 c 30 khz sr slew rate a v = C1, v out = 0.5v to 4.5v 11 18 v/ms measure 1v to 4v, 0 c t a 70 c 8 v/ms C40 c t a 85 c 6 v/ms fpbw full power bandwidth (note 9) v out = 4v p-p 0.87 1.4 khz note 1: stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. exposure to any absolute maximum rating condition for extended periods may affect device reliability and lifetime. note 2: a heat sink may be required to keep the junction temperature below the absolute maximum. this depends on the power supply voltage and how many amplifiers are shorted. the ja specified for the dd and dhc packages is with minimal pcb heat spreading metal. using expanded metal area on all layers of a board reduces this value. note 3: the LT6000c/LT6000i/lt6001c/lt6001i and lt6002c/lt6002i are guaranteed functional over the temperature range of C40 c to 85 c. note 4: the LT6000c/lt6001c/lt6002c is guaranteed to meet specified performance from 0 c to 70 c. the LT6000c/lt6001c/lt6002c are designed, characterized and expected to meet specified performance from C40 c to 85 c but are not tested or qa sampled at these temperatures. the LT6000i/lt6001i/ lt6002i is guaranteed to meet specified performance from C40 c to 85 c. note 5: this parameter is not 100% tested. note 6: output voltage swings are measured between the output and power supply rails. note 7: specifications apply to the LT6000 or the lt6001dd with shutdown. note 8: guaranteed by correlation to slew rate at v s = 1.8v and gbw at v s = 5v. note 9: full-power bandwidth is calculated from the slew rate: fpbw = sr/ v p-p .
LT6000/lt6001/lt6002 7 600012fa typical perfor a ce characteristics uw supply current vs supply voltage total supply voltage (v) 0 0 supply current per amplifier ( a) 5 10 15 12 14 16 35 600012 g03 246810 18 20 25 30 t a = 125 c t a = C55 c t a = 25 c v cm = 0.5v tc v os distribution v os distribution input offset voltage vs total supply voltage total supply voltage (v) 0 C300 offset voltage ( v) C100 C100 0 12 14 16 400 600012 g05 246810 18 100 200 300 t a = 125 c t a = C55 c t a = 25 c v cm = 0.5v typical part input common mode voltage (v) C200 offset voltage ( v) 0 200 400 C100 100 300 1234 60012 g06 5 0.5 0 1.5 2.5 3.5 4.5 v s = 5v, 0v typical part t a = 125 c t a = 25 c t a = C55 c input bias current vs common mode voltage common mode voltage (v) 0 C5.0 input bias current (na) C2.5 2.5 5.0 7.5 12.5 0.5 2.5 3.5 60012 g07 0 10.0 2 4.5 5 1 1.5 34 v s = 5v, 0v t a = 125 c t a = 25 c t a = C55 c output saturation voltage vs load current (output high) sourcing load current (ma) 0.001 0.01 output high saturation voltage (v) 0.1 1.0 0.1 1 0.01 10 60012 g08 t a = 25 c t a = 125 c t a = C55 c v s = 5v, 0v input overdrive = 30mv output saturation voltage vs load current (output low) sinking load current (ma) 0.001 0.01 output low saturation voltage (v) 0.1 1.0 0.1 1 0.01 10 60012 g08 t a = 25 c t a = 125 c t a = C55 c v s = 5v, 0v input overdrive = 30mv input offset voltage vs input common mode voltage input offset voltage ( v) 0 percent of units (%) 10 20 30 5 15 25 C400 C200 0 200 60012 g01 600 400 C600 v s = 5v, 0v v cm = 2.5v ms8 package distribution ( v/ c) C5 percent of units (%) 12 16 20 3 20012 g02 8 4 10 14 18 6 2 0 C3 C4 C1 C2 12 4 0 5 v s = 5v, 0v v cm = 2.5v ms8, gn16, dd10 packages C40 c to 85 c total supply voltage (v) 1 change in offset voltage ( v) 100 150 200 3 60012 g35 50 0 C100 1.5 2 2.5 C50 300 250 t a = 125 c t a = 25 c v cm = 0.5v t a = C55 c change in input offset voltage vs total supply voltage
LT6000/lt6001/lt6002 600012fa 8 typical perfor a ce characteristics uw 0.1hz to 10hz output voltage noise open-loop gain output short-circuit current vs total supply voltage (sourcing) total supply voltage (v) 1 8 10 14 4 60012 g11 6 4 23 5 2 0 12 output short-circuit current (ma) v cm = 0.5v output shorted to v C t a = 125 c t a = 25 c t a = C55 c output short-circuit current vs total supply voltage (sinking) total supply voltage (v) 1 output short-circiut current (ma) 4 6 5 60012 g12 2 0 2 3 4 10 8 v cm = 0.5v output shorted to v + t a = 125 c t a = 25 c t a = C55 c time (seconds) noise voltage (500nv/div) 2468 60012 g13 10 1 03579 v s = 2.5v noise voltage density vs frequency frequency (hz) 1 50 noise voltage (nv/ hz) 80 90 100 10 100 1000 60012 g14 70 60 v s = 5v, 0v t a = 25 c v cm = 4.5v v cm = 2.5v input noise current vs frequency frequency (hz) 1 10 input noise current density (fa/ hz) 100 1000 10 100 1000 60012 g15 v s = 5v, 0v t a = 25 c v cm = 4.5v v cm = 2.5v output voltage (v) 0 C60 change in input offset voltage ( v) C40 C20 0 20 60 0.3 0.6 0.9 1.2 60012 g16 1.5 1.8 40 v s = 1.8v, 0v v cm = 0.5v t a = 25 c r l = 10k r l = 100k output voltage (v) 0 change in input offset voltage ( v) 0 20 4 60012 g17 C20 C40 1 2 3 5 40 v s = 5v, 0v v cm = 2.5v t a = 25 c r l = 10k r l = 100k output voltage (v) C2.5 change in input offset voltage ( v) 200 150 100 50 0 C50 C100 C150 C 200 1.5 20012 g18 C1.5 C0.5 0.5 2.5 1 C2 C1 0 2 v s = 2.5v t a = 25 c r l = 10k r l = 100k open-loop gain open-loop gain output saturation voltage vs input overdrive input overdrive (mv) 0 0 output saturation voltage (mv) 20 40 60 5 10 15 20 60012 g10 25 80 100 10 30 50 70 90 30 v s = 5v, 0v no load output high output low
LT6000/lt6001/lt6002 9 600012fa typical perfor a ce characteristics uw slew rate vs temperature gain bandwidth and phase margin vs temperature temperature ( c) C50 10 gain bandwidth (khz) phase margin (deg) 20 30 40 60 70 80 C25 25 50 125 50 45 50 55 60 70 75 80 65 0 75 100 v s = 1.8v, 0v v cm = 0.5v v s = 1.8v, 0v v cm = 0.5v v s = 5v, 0v v cm = 2.5v v s = 5v, 0v v cm = 2.5v gain bandwidth phase margin f = 1khz 60012 g21 temperature ( c) C50 slew rate (v/ms) 25 30 35 25 75 60012 g22 20 15 C25 0 50 100 125 10 5 rising v s = 5v, 0v rising v s = 1.8v, 0v falling v s = 5v, 0v falling v s = 1.8v, 0v a v = C1 r f = r g = 100k capacitive load handling overshoot vs capacitive load capacitive load (pf) 10 20 overshoot (%) 25 30 35 40 100 1000 10000 60012 g23 15 10 5 0 45 50 a v = 1 a v = 2 a v = 5 v s = 5v, 0v v cm = 2.5v common mode rejection ratio vs frequency frequency (khz) 0.1 70 common mode rejection ratio (db) 80 90 100 1 10 100 60012 g24 60 50 40 30 v s = 2.5v t a = 25 c power supply rejection ratio vs frequency frequency (khz) 30 common mode rejection ratio (db) 70 110 10 50 90 0.01 1 10 100 60012 g25 C10 0.1 positive supply negative supply v s = 2.5v t a = 25 c output impedance vs frequency frequency (khz) 0.01 0.1 0.1 output impedance ( ? ) 10 10000 1 10 100 60012 g26 1 100 1000 v s = 2.5v t a = 25 c a v = 10 a v = 1 disabled output impedance vs frequency (LT6000/lt6001dd) frequency (khz) 0.01 0 output impedance (k ? ) 10 1000 1 0.1 10 100 60012 g27 1 100 v s = 2.5v v pin6(shdn) = C2.5v gain and phase vs frequency frequency (khz) 0 gain (db) phase (deg) 60 70 C10 C20 50 20 40 30 10 0.1 10 100 1000 60012 g19 C30 C20 100 120 C40 C60 80 20 60 40 0 C80 1 v cm = 4.5v v cm = 4.5v v cm = 2.5v phase gain v cm = 2.5v v s = 5v, 0v r f = r g = 100k a v = C1 gain bandwidth and phase margin vs supply voltage total supply voltage (v) 0 30 phase margin (deg) gain bandwidth (khz) 40 60 70 80 4 8 10 18 600012 g36 50 45 50 60 65 70 55 26 12 14 16 r f = r g = 100k a v = C1 f = 1khz phase margin gain bandwidth
LT6000/lt6001/lt6002 600012fa 10 typical perfor a ce characteristics uw 1.5v 0.25v 100 s/div a v = 1 v s = 1.8v, 0v c l = 100pf r l = 10k 60012 g29 20mv/div 10 s/div a v = 1 v s = 2.5v c l = 100pf r l = 100k 60012 g30 large-signal response small-signal response total supply current vs shdn pin voltage (lt6001dd) shdn pin voltage (v) 0 0 supply current both amplifiers ( a) 10 30 40 50 0.4 0.8 1.0 1.8 60012 g31 20 0.2 0.6 1.2 1.4 1.6 v s = 1.8v, 0v t a = 125 c t a = C55 c t a = 25 c total supply current vs shdn pin voltage (lt6001dd) shdn pin voltage (v) 0 supply current both amplifiers ( a) 20 40 60 10 30 50 C3 C1 1 3 60012 g32 5 C4 C5 C2 0 2 4 v s = 5v t a = 125 c t a = C55 c t a = 25 c 0v v shdn v out 0v 500 s/div v in = 1v a v = 1 v s = 1.8v, 0v r l = 100k 60012 g33 shutdown response (LT6000/lt6001dd) large-signal response 4.5v 0.5v 100 s/div a v = 1 v s = 5v, 0v c l = 100pf r l = 10k 60012 g28 supply current vs shdn pin voltage (LT6000) supply current vs shdn pin voltage (LT6000) shdn pin voltage (v) 0 0 supply current ( a) 5 15 20 25 0.4 0.8 1.0 1.8 60012 g37 10 0.2 0.6 1.2 1.4 1.6 30 v s = 1.8v, 0v t a = 125 c t a = C55 c t a = 25 c shdn pin voltage (v) 0 supply current ( a) 10 20 30 5 15 25 C3 C1 1 3 60012 g34 5 C4 C5 C2 0 2 4 t a = 125 c v s = 5v t a = C55 c t a = 25 c
LT6000/lt6001/lt6002 11 600012fa q1 q17 q6 q2 q10 c1 q3 in + q8 q19 q20 r1 r8 7m r6 r7 r2 30k d3 v + v + v C r4 r5 in C r3 30k q9 q11 q14 v + out v C shdn v C q15 cm q13 complementary drive generator q12 q4 q5 q7 q16 q18 applicatio s i for atio wu uu supply voltage the positive supply of the LT6000/lt6001/lt6002 should be bypassed with a small capacitor (about 0.01 f) within an inch of the pin. when driving heavy loads, an additional 4.7 f electrolytic capacitor should be used. when using split supplies, the same is true for the negative supply pin. rail-to-rail characteristics the LT6000/lt6001/lt6002 are fully functional for an input signal range from the negative supply to the positive supply. figure 1 shows a simplified schematic of the amplifier. the input stage consists of two differential amplifiers, a pnp stage q3/q6 and an npn stage q4/q5 that are active over different ranges of the input common mode voltage. the pnp stage is active for common mode voltages, v cm , between the negative supply to approxi- mately 1v below the positive supply. as v cm moves closer towards the positive supply, the transistor q7 will steer q2s tail current to the current mirror q8/q9, activating the npn differential pair. the pnp pair becomes inactive for the rest of the input common mode range up to the positive supply. the second stage is a folded cascode and current mirror that converts the input stage differential signals into a single ended output. capacitor c1 reduces the unity cross frequency and improves the frequency stability without degrading the gain bandwidth of the amplifier. the comple- mentary drive generator supplies current to the output transistors that swing from rail to rail. input the input bias current depends on which stage is active. the input bias current polarity depends on the input common mode voltage. when the pnp stage is active, the input bias currents flow out of the input pins. they flow in the opposite direction when the npn stage is active. the offset error due to the input bias currents can be minimized by equalizing the noninverting and inverting source impedance. figure 1 si plified sche atic ww
LT6000/lt6001/lt6002 600012fa 12 applicatio s i for atio wu uu the input offset voltage changes depending on which input stage is active; input offset voltage is trimmed on both input stages, and is guaranteed to be 600 v max in the pnp stage. by trimming the input offset voltage of both input stages, the input offset voltage over the entire common mode range (cmrr) is typically 400 v, main- taining the precision characteristics of the amplifier. the input stage of the LT6000/lt6001/lt6002 incorpo- rates phase reversal protection to prevent wrong polarity outputs from occurring when the inputs are driven up to 2v below the negative rail. 30k protective resistors are included in the input leads so that current does not become excessive when the inputs are forced below v C or when a large differential signal is applied. input current should be limited to 10ma when the inputs are driven above the positive rail. output the output of the LT6000/ lt6001/lt6002 can swing to within 30mv of the positive rail with no load and within 30mv of the negative rail with no load. when monitoring input voltages within 30mv of the positive rail or within 30mv of the negative rail, gain should be taken to keep the output from clipping. the LT6000/ lt6001/lt6002 can typically source 10ma on a single 5v supply, sourc- ing current is reduced to 4ma on a single 1.8v supply as noted in the electrical characteristics. the normally reverse-biased substrate diode from the output to v C will cause unlimited currents to flow when the output is forced below v C . if the current is transient and limited to 100ma, no damage will occur. start-up and output saturation characteristics micropower op amps are often not micropower during start-up characteristics or during output saturation. this can wreak havoc on limited current supplies, in the worst case there may not be enough supply current available to take the system up to nominal voltages. also, when the output saturates, the part may draw excessive current and pull down the supplies, compromising rail-to-rail perfor- mance. figure 1 shows the start-up characteristics of the LT6000/lt6001/lt6002 for three limiting cases. the cir- cuits 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 circuit brings the output up at 1/2 supply. in all cases, the supply current is well controlled and is not excessive when the output is on either rail. supply voltage (v) 0 supply current per amplifier ( a) 12 16 20 4 60012 f01 8 4 10 14 18 6 2 0 1 0.5 2 1.5 3 3.5 4.5 2.5 5 output low output high output at v s /2 C + 30mv v s output high C + v s /2 v s 60012 f02 output at v s /2 C + 30mv v s output low figure 1. start-up characteristics figure 2. circuits for start-up characteristics
LT6000/lt6001/lt6002 13 600012fa applicatio s i for atio wu uu the LT6000/lt6001/lt6002 outputs can swing to within a respectable 30mv of each rail and draw virtually no excessive supply current. figure 3 compares the dual lt6001 to a competitive part. both op amps are in unity gain and their outputs are driven into each rail. the supply current is shown when the op amps are in linear operation and when they are driven into each rail. as can be seen from figure 3, the supply current of the competitive part increases 3-fold or 5-fold depending on which rail the output goes to whereas the lt6001 draws virtually no excessive current. gain the open-loop gain is almost independent of load when the output is sourcing current. this optimizes perfor- mance in single supply applications where the load is returned to ground. the typical performance curve of open-loop gain for various loads shows the details. shutdown the single LT6000 and the 10-lead dual lt6001 include a shutdown feature that disables the part reducing quies- cent current and makes the output high impedance. the devices can be shut down by bringing the shdn pin within 0.3v of v C . the amplifiers are guaranteed to shut down if the shdn pin is brought within 0.3v of v C . the exact switchover point will be a function of the supply voltage. see the typical performance characteristics curves sup- ply current vs shutdown pin voltage. when shut down the total supply current is about 0.8 a and the output leakage current is 20na (v C v out v + ). for normal operation the shdn pin should be tied to v + . it can be left floating, however, parasitic leakage currents over 1 a at the shdn pin may inadvertently place the part into shutdown. v in (v) C3 C3 v out (v) i cc ( a) C2 C1 0 4 2 C1 1 2 3 1 10 20 30 70 50 60 40 C2 0 3 60012 f03 v in v s = 2.5v, a v = 1 + C competitive part lt6001 v out supply current per amplifier figure 3. v out and i cc vs input voltage
LT6000/lt6001/lt6002 600012fa 14 u typical applicatio C + 8 10k 90.9k 0.9v (nimh) C0.9v (nimh) 3 2 1 C + 10k 90.9k 5 v in 6 7 out 60012 ta02a 1/2 lt6001 1/2 lt6001 frequency (hz) C10 gain (db) 50 60 C20 C30 40 10 30 20 0 100 10k 100k 1m 60012 ta02b C40 1k gain of 100 amplifier (400khz gbw on 30 a supply) gain vs frequency
LT6000/lt6001/lt6002 15 600012fa package descriptio u dcb package 6-lead plastic dfn (2mm 3mm) (reference ltc dwg # 05-08-1715) 3.00 0.10 (2 sides) 2.00 0.10 (2 sides) note: 1. drawing to be made a jedec package outline m0-229 variation of (tbd) 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 the top and bottom of package 0.40 0.10 bottom viewexposed pad 1.65 0.10 (2 sides) 0.75 0.05 r = 0.115 typ r = 0.05 typ 1.35 0.10 (2 sides) 1 3 6 4 pin 1 bar top mark (see note 6) 0.200 ref 0.00 C 0.05 (dcb6) dfn 0405 0.25 0.05 0.50 bsc pin 1 notch r0.20 or 0.25 45 chamfer 0.25 0.05 1.35 0.05 (2 sides) recommended solder pad pitch and dimensions 1.65 0.05 (2 sides) 2.15 0.05 0.70 0.05 3.55 0.05 package outline 0.50 bsc
LT6000/lt6001/lt6002 600012fa 16 package descriptio u ms8 package 8-lead plastic msop (reference ltc dwg # 05-08-1660) msop (ms8) 0204 0.53 0.152 (.021 .006) seating plane note: 1. dimensions in millimeter/(inch) 2. drawing not to scale 3. dimension does not include mold flash, protrusions or gate burrs. mold flash, protrusions or gate burrs shall not exceed 0.152mm (.006") per side 4. dimension does not include interlead flash or protrusions. interlead flash or protrusions shall not exceed 0.152mm (.006") per side 5. lead coplanarity (bottom of leads after forming) shall be 0.102mm (.004") max 0.18 (.007) 0.254 (.010) 1.10 (.043) max 0.22 C 0.38 (.009 C .015) typ 0.127 0.076 (.005 .003) 0.86 (.034) ref 0.65 (.0256) bsc 0 C 6 typ detail a detail a gauge plane 12 3 4 4.90 0.152 (.193 .006) 8 7 6 5 3.00 0.102 (.118 .004) (note 3) 3.00 0.102 (.118 .004) (note 4) 0.52 (.0205) ref 5.23 (.206) min 3.20 C 3.45 (.126 C .136) 0.889 0.127 (.035 .005) recommended solder pad layout 0.42 0.038 (.0165 .0015) typ 0.65 (.0256) bsc
LT6000/lt6001/lt6002 17 600012fa package descriptio u dd package 10-lead (3mm 3mm) plastic dfn (reference ltc dwg # 05-08-1699) 3.00 0.10 (4 sides) note: 1. drawing to be made a jedec package outline m0-229 variation of (weed-2). check the ltc website data sheet for current status of variation assignment 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 the top and bottom of package 0.38 0.10 bottom viewexposed pad 1.65 0.10 (2 sides) 0.75 0.05 r = 0.115 typ 2.38 0.10 (2 sides) 1 5 10 6 pin 1 top mark (see note 6) 0.200 ref 0.00 C 0.05 (dd10) dfn 1103 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 3.50 0.05 package outline 0.25 0.05 0.50 bsc
LT6000/lt6001/lt6002 600012fa 18 package descriptio u gn package 16-lead narrow plastic ssop (reference ltc dwg # 05-08-1641) gn16 (ssop) 0204 12 3 4 5 6 7 8 .229 C .244 (5.817 C 6.198) .150 C .157** (3.810 C 3.988) 16 15 14 13 .189 C .196* (4.801 C 4.978) 12 11 10 9 .016 C .050 (0.406 C 1.270) .015 .004 (0.38 0.10) 45 0 C 8 typ .007 C .0098 (0.178 C 0.249) .0532 C .0688 (1.35 C 1.75) .008 C .012 (0.203 C 0.305) typ .004 C .0098 (0.102 C 0.249) .0250 (0.635) bsc .009 (0.229) ref .254 min recommended solder pad layout .150 C .165 .0250 bsc .0165 .0015 .045 .005 *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 inches (millimeters) note: 1. controlling dimension: inches 2. dimensions are in 3. drawing not to scale
LT6000/lt6001/lt6002 19 600012fa package descriptio u dhc package 16-lead (5mm 5mm) plastic dfn (reference ltc dwg # 05-08-1706) 3.00 0.10 (2 sides) 5.00 0.10 (2 sides) note: 1. drawing proposed to be made variation of version (wjed-1) in jedec package outline mo-229 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 the top and bottom of package 0.40 0.10 bottom viewexposed pad 1.65 0.10 (2 sides) 0.75 0.05 r = 0.115 typ r = 0.20 typ 4.40 0.10 (2 sides) 1 8 16 9 pin 1 top mark (see note 6) 0.200 ref 0.00 C 0.05 (dhc16) dfn 1103 0.25 0.05 pin 1 notch 0.50 bsc 4.40 0.05 (2 sides) recommended solder pad pitch and dimensions 1.65 0.05 (2 sides) 2.20 0.05 0.50 bsc 0.65 0.05 3.50 0.05 package outline 0.25 0.05
LT6000/lt6001/lt6002 600012fa 20 related parts linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax: (408) 434-0507 www.linear.com ? linear technology corporation 2005 lt 0406 rev a ?printed in usa u typical applicatio low power v-to-f converter C + a2 1/2 lt6001 2 1m 1m 1m 2m v ref v ref 1m v ref v ref v in v ref 42.2k 1 7 8 4 0.1 f 42.2k 2m 2m 42.2k tp0610 2n7002 3 C + a1 1/2 lt6001 5 6 8 7 v out 6 5 2 1 C + ltc ? 1440 3 1000pf frequency out 7.5hz/mv ? v in linearity 5%, v in 20mv to 800mv i supply 60 a to 100 a diodes: central semi cmod3003 4 0.1 f 0.1 f 1 f v ref v s 4.3v to 20v 6 60012 ta03 2 1 4 lt1790-4.096 C + LT6000 1.8v v out v in1 shdn C + LT6000 1.8v 60012 ta04a v in2 input select shdn sn74lvc2604 mux amplifier part number description comments lt2178/lt2179 17 a dual/quad single supply op amps 120 v v os(max) , gain bandwidth = 60khz lt1490a/lt1491a 50 a dual/quad over-the-top ? rail-to-rail input and output op amps 950 v v os(max) , gain bandwidth = 200khz lt1494/lt1495/lt1496 1.5 a max single/dual/quad over-the-top precision rail-to-rail input 375 v v os(max) , gain bandwidth = 2.7khz and output op amps lt1672/lt1673/lt1674 2 a max, av 5, single/dual/quad over-the-top precision rail-to-rail gain of 5 stable, gain bandwidth = 12khz input and output op amps lt1782 micropower, over-the-top sot-23 rail-to-rail input and output op amps sot-23, 800 v v os(max) , i s = 55 a (max), gain bandwidth = 200khz, shutdown pin over-the-top is a registered trademark of linear technology corporation. v out 5ms/div 60012 ta04b v s = 1.8v v in1 = 250hz at 1v p-p v in2 = 500hz at 0.5v p-p input select = 25hz at 1.8v p-p input select mux amplifier waveforms

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