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ltc2057/ltc2057hv 1 2057f for more information www.linear.com/ltc2057 typical application features description high voltage, low noise zero-drift operational amplifier the lt c ? 2057 is a high voltage, low noise, zero-drift op- erational amplifier that offers precision dc performance over a wide supply range of 4.75 v to 36 v or 4.75 v to 60v for the ltc2057hv. offset voltage and 1/f noise are suppressed, allowing this amplifier to achieve a maximum offset voltage of 4 v and a dc to 10 hz input noise volt - age of 200 nv p-p ( typ). the ltc2057s self-calibrating circuitry results in low offset voltage drift with temperature , 0.015v/c ( max), and zero-drift over time. the amplifier also features an excellent power supply rejection ratio (psrr) of 160 db and a common mode rejection ratio (cmrr) of 150db (typ). the ltc2057 provides rail-to-rail output swing and an input common mode range that includes the v C rail ( v C C 0.1v to v + C 1.5 v). in addition to low offset and noise, this amplifier features a 1.5 mhz ( typ) gain-bandwidth product and a 0.45v/s (typ) slew rate. wide supply range, combined with low noise, low offset, and excellent psrr and cmrr make the ltc2057 and ltc2057hv well suited for high dynamic - range test , measurement, and instrumentation systems. l , lt , lt c , lt m , linear technology, over-the- top , and the linear logo are registered trademarks of linear technology corporation. all other trademarks are the property of their respective owners. input offset voltage vs supply voltage applications n supply voltage range n 4.75v to 36v (ltc2057) n 4.75v to 60v (ltc2057hv) n offset voltage: 4v (maximum) n offset voltage drift: 0.015v/c (maximum, C40c to 125c) n input noise voltage n 200nv p-p , dc to 10hz ( typ ) n 11nv/ hz , 1khz ( typ ) n input common mode range: v C C 0.1v to v + C 1.5v n rail-to-rail output n unity gain stable n gain bandwidth product: 1.5mhz ( typ ) n slew rate: 0.45v/s ( typ ) n a vol : 150db ( typ ) n psrr: 160db ( typ ) n cmrr: 150db ( typ ) n shutdown mode n high resolution data acquisition n reference buffering n test and measurement n electronic scales n thermocouple amplifiers n strain gauges n low-side current sense n automotive monitors and control wide input range precision gain-of-100 instrumentation amplifier 30v C30v Cin+in 30v 11.5k 11.5k C30v 2057 ta01a ltc2057hv ltc2057hv m9m3 m1 input cm range = 28v with 4v of output swing cmrr = 130db (typ), input offset voltage = 1v (typ) +C C + 89 10 p1p3 p9 lt1991a 18v C18v ref out 6 5 4 7 v out v cc v ee 232 12 3 v s (v) 0 ?5 ?4 ?3 ?2 ?1 v os (v) 0 1 53 42 10 20 30 40 50 5 15 25 35 45 55 6560 2057 ta01b 5 typical unitsv cm = v s /2 t a = 25c downloaded from: http:///
ltc2057/ltc2057hv 2 2057f for more information www.linear.com/ltc2057 absolute maximum ratings total supply voltage (v + to v ? ) ltc 2057 .............................................................. 40 v ltc 2057 hv ........................................................... 65 v input voltage ? in , + in ................................... v ? ? 0.3 v to v + + 0.3 v sd , sd com ............................ v ? ? 0.3 v to v + + 0.3 v input current ? in , + in ........................................................... 10 ma sd , sd com ..................................................... 10 ma differential input voltage ? in ? + in .............................................................. 6 v sd ? sd com ........................................ ?0.3 v to 5.3 v top view dd package 8-lead (3mm 3mm) plastic dfn 5 6 7 8 4 3 2 1 sd ?in+in v ? sdcom v + outnc ?+ 9 v ? t jmax = 150c, ja = 43c/w exposed pad (pin 9) is v ? pcb connection required 12 3 4 sd ?in+in v ? 87 6 5 sdcom v + outnc top view ms8 package 8-lead plastic msop ?+ t jmax = 150c, ja = 163c/w 12 3 4 87 6 5 top view sdcom v + outnc sd ?in+in v ? s8 package 8-lead plastic so ?+ t jmax = 150c, ja = 120c/w 12 3 4 5 grd ?in+in grd v ? 109 8 7 6 sd sdcom v + ncout top view ms package 10-lead plastic msop ?+ t jmax = 150c, ja = 160c/w pin configuration output short - circuit duration .......................... indefinite operating temperature range ( note 2) ltc 2 057 i / ltc 2057 hvi ........................ ?40 c to 85 c ltc 2057 h / ltc 2057 hvh ................... ?40 c to 125 c storage temperature range .................. ?65 c to 150 c lead temperature ( soldering , 10 sec ) ................... 300 c (note 1) downloaded from: http:///
ltc2057/ltc2057hv 3 2057f for more information www.linear.com/ltc2057 order information lead free finish tape and reel part marking* package description temperature range ltc2057idd#pbf ltc2057idd#trpbf lgcz 8-lead plastic dfn (3mm 3mm) ?40c to 85c ltc2057hvidd#pbf ltc2057hvidd#trpbf lgdb 8-lead plastic dfn (3mm 3mm) ?40c to 85c ltc2057hdd#pbf ltc2057hdd#trpbf lgcz 8-lead plastic dfn (3mm 3mm) ?40c to 125c ltc2057hvhdd#pbf ltc2057hvhdd#trpbf lgdb 8-lead plastic dfn (3mm 3mm) ?40c to 125c ltc2057ims8#pbf ltc2057ims8#trpbf ltfgk 8-lead plastic msop ?40c to 85c ltc2057hvims8#pbf ltc2057hvims8#trpbf ltgdc 8-lead plastic msop ?40c to 85c ltc2057hms8#pbf ltc2057hms8#trpbf ltfgk 8-lead plastic msop ?40c to 125c ltc2057hvhms8#pbf ltc2057hvhms8#trpbf ltgdc 8-lead plastic msop ?40c to 125c ltc2057ims#pbf ltc2057ims#trpbf ltgcx 10-lead plastic msop ?40c to 85c ltc2057hvims#pbf ltc2057hvims#trpbf ltgcy 10-lead plastic msop ?40c to 85c ltc2057hms#pbf ltc2057hms#trpbf ltgcx 10-lead plastic msop ?40c to 125c ltc2057hvhms#pbf ltc2057hvhms#trpbf ltgcy 10-lead plastic msop ?40c to 125c ltc2057is8#pbf ltc2057is8#trpbf 2057 8-lead plastic small outline ?40c to 85c ltc2057hvis8#pbf ltc2057hvis8#trpbf 2057hv 8-lead plastic small outline ?40c to 85c ltc2057hs8#pbf ltc2057hs8#trpbf 2057 8-lead plastic small outline ?40c to 125c ltc2057hvhs8#pbf ltc2057hvhs8#trpbf 2057hv 8-lead plastic small outline ?40c to 125c consult lt c marketing for parts specified with wider operating temperature ranges . * the temperature grade is identified by a label on the shipping container . consult lt c marketing for information on non-standard lead based finish parts. for more information on lead free part marking, go to: http://www.linear.com/leadfree/ for more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ downloaded from: http:///
ltc2057/ltc2057hv 4 2057f for more information www.linear.com/ltc2057 (ltc2057/ltc2057hv) the l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c . unless otherwise noted, v s = 2.5 v ; v cm = v out = 0 v. electrical characteristics symbol parameter conditions min typ max units v os input offset voltage (note 3) 0.5 4 v ?v os /?t average input offset voltage drift (note 3) C40c to 125c l 0.015 v/c i b input bias current (note 4) C40c to 85c C40c to 125c l l 30 200 300 3.5 pa pa na i os input offset current (note 4) C40c to 85c C40c to 125c l l 60 400 460 1.0 pa pa na i n input noise current spectral density 1khz 170 fa/ hz e n input noise voltage spectral density 1khz 11 nv/ hz e n p-p input noise voltage dc to 10hz 200 nv p-p c in differential input capacitance common mode input capacitance 3 3 pf pf cmrr common mode rejection ratio (note 5) v cm = v C C 0.1v to v + C 1.5v C40c to 125c l 114 111 150 db db psrr power supply rejection ratio (note 5) v s = 4.75v to 36v C40c to 125c l 133 129 160 db db a vol open loop voltage gain (note 5) v out = v C +0.2v to v + C0.2v, r l =1k C40c to 125c l 118 117 150 db db v ol C v C output voltage swing low no load C40c to 125c i sink = 1ma C40c to 125c i sink = 5ma C40c to 85c C40c to 125c l l l l 0.2 35 180 10 15 60 90 270 365 415 mv mv mv mv mv mv mv v + C v oh output voltage swing high no load C40c to 125c i source = 1ma C40c to 125c i source = 5ma C40c to 85c C40c to 125c l l l l 0.2 50 250 10 15 75 115 345 470 535 mv mv mv mv mv mv mv i sc short circuit current 17 26 ma sr rise rising slew rate a v = C1, r l = 10k 1.2 v/s sr fall falling slew rate a v = C1, r l = 10k 0.45 v/s gbw gain bandwidth product 1.5 mhz f c internal chopping frequency 100 khz i s supply current no load C40c to 85c C40c to 125c l l 0.8 1.21 1.50 1.70 ma ma ma in shutdown mode C40c to 85c C40c to 125c l l 2.5 5.6 6.5 a a a v sdl shutdown threshold ( sd C sdcom) low C40c to 125c l 0.8 v v sdh shutdown threshold ( sd C sdcom) high C40c to 125c l 2 v sdcom voltage range C40c to 125c l v C v + C2v v i sd sd pin current C40c to 125c, v sd C v sdcom = 0 l C2 C0.5 a i sdcom sdcom pin current C40c to 125c, v sd C v sdcom = 0 l 0.5 2 a downloaded from: http:///
ltc2057/ltc2057hv 5 2057f for more information www.linear.com/ltc2057 (ltc2057/ltc2057hv) the l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c . unless otherwise noted, v s = 15 v ; v cm = v out = 0 v. electrical characteristics symbol parameter conditions min typ max units v os input offset voltage (note 3) 0.5 4.5 v ?v os /?t average input offset voltage drift (note 3) C40c to 125c l 0.015 v/c i b input bias current (note 4) C40c to 85c C40c to 125c l l 30 200 360 6.0 pa pa na i os input offset current (note 4) C40c to 85c C40c to 125c l l 60 400 480 1.5 pa pa na i n input noise current spectral density 1khz 150 fa/ hz e n input noise voltage spectral density 1khz 12 nv/ hz e n p-p input noise voltage dc to 10hz 210 nv p-p c in differential input capacitance common mode input capacitance 3 3 pf pf cmrr common mode rejection ratio (note 5) v cm = v C C 0.1v to v + C 1.5v C40c to 125c l 128 126 150 db db psrr power supply rejection ratio (note 5) v s = 4.75v to 36v C40c to 125c l 133 129 160 db db a vol open loop voltage gain (note 5) v out = v C +0.25v to v + C0.25v, r l =10k C40c to 125c l 130 128 150 db db v ol C v C output voltage swing low no load C40c to 125c i sink = 1ma C40c to 125c i sink = 5ma C40c to 85c C40c to 125c l l l l 2 35 175 12 45 60 100 255 360 435 mv mv mv mv mv mv mv v + C v oh output voltage swing high no load C40c to 125c i source = 1ma C40c to 125c i source = 5ma C40c to 85c C40c to 125c l l l l 3 50 235 15 45 75 125 335 465 560 mv mv mv mv mv mv mv i sc short circuit current 19 30 ma sr rise rising slew rate a v = C1, r l = 10k 1.3 v/s sr fall falling slew rate a v = C1, r l = 10k 0.45 v/s gbw gain bandwidth product 1.5 mhz f c internal chopping frequency 100 khz i s supply current no load C40c to 85c C40c to 125c l l 0.88 1.35 1.65 1.83 ma ma ma in shutdown mode C40c to 85c C40c to 125c l l 3 8 9 a a a v sdl shutdown threshold ( sd C sdcom) low C40c to 125c l 0.8 v v sdh shutdown threshold ( sd C sdcom) high C40c to 125c l 2 v sdcom voltage range C40c to 125c l vC v + C2v v i sd sd pin current C40c to 125c, v sd C v sdcom = 0 l C2.0 C0.5 a i sdcom sdcom pin current C40c to 125c, v sd C v sdcom = 0 l 0.5 2 a downloaded from: http:///
ltc2057/ltc2057hv 6 2057f for more information www.linear.com/ltc2057 (ltc2057hv) the l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c . unless otherwise noted, v s = 30 v ; v cm = v out = 0 v. electrical characteristics symbol parameter conditions min typ max units v os input offset voltage (note 3) 0.5 5 v ?v os /?t average input offset voltage drift ( note 3) C40c to 125c l 0.025 v/c i b input bias current (note 4) C40c to 85c C40c to 125c l l 30 200 455 11 pa pa na i os input offset current (note 4) C40c to 85c C40c to 125c l l 60 400 500 3 pa pa na i n input noise current spectral density 1khz 130 fa/ hz e n input noise voltage spectral density 1khz 13 nv/ hz e n p-p input noise voltage dc to 10hz 220 nv p-p c in differential input capacitance common mode input capacitance 3 3 pf pf cmrr common mode rejection ratio (note 5) v cm = v C C 0.1v to v + C 1.5v C40c to 125c l 133 131 150 db db psrr power supply rejection ratio (note 5) v s = 4.75v to 60v C40c to 125c l 138 136 160 db db a vol open loop voltage gain (note 5) v out = v C +0.25v to v + C 0.25v, r l = 10k C40c to 125c l 135 130 150 db db v ol C v C output voltage swing low no load C40c to 125c i sink = 1ma C40c to 125c i sink = 5ma C40c to 85c C40c to 125c l l l l 3 35 175 15 45 60 105 260 370 445 mv mv mv mv mv mv mv v + C v oh output voltage swing high no load C40c to 125c i source = 1ma C40c to 125c i source = 5ma C40c to 85c C40c to 125c l l l l 3 50 235 15 45 75 130 335 475 575 mv mv mv mv mv mv mv i sc short circuit current 19 30 ma sr rise rising slew rate a v = C1, r l = 10k 1.3 v/s sr fall falling slew rate a v = C1, r l = 10k 0.45 v/s gbw gain bandwidth product 1.5 mhz f c internal chopping frequency 100 khz is supply current no load C40c to 85c C40c to 125c l l 0.90 1.40 1.73 1.92 ma ma ma in shutdown mode C40c to 85c C40c to 125c l l 3 9 11 a a a v sdl shutdown threshold (sd C sdcom) low C40c to 125c l 0.8 v v sdh shutdown threshold (sd C sdcom) high C40c to 125c l 2 v sdcom voltage range C40c to 125c l v C v + C2v v i sd sd pin current C40c to 125c, v sd C v sdcom = 0 l C2 C0.5 a i sdcom sdcom pin current C40c to 125c, v sd C v sdcom = 0 l 0.5 2 a downloaded from: http:///
ltc2057/ltc2057hv 7 2057f for more information www.linear.com/ltc2057 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: the ltc2057i/ltc2057hvi are guaranteed to meet specified performance from ?40c to 85c. the ltc2057h/ltc2057hvh are guaranteed to meet specified performance from ?40c to 125c. note 3: these parameters are guaranteed by design. thermocouple effects preclude measurements of these voltage levels during automated testing. v os is measured to a limit determined by test equipment capability. note 4: these specifications are limited by automated test system capability. leakage currents and thermocouple effects reduce test accuracy. for tighter specifications, please contact lt c marketing. note 5: minimum specifications for these parameters are limited by the capabilities of the automated test system, which has an accuracy of approximately 10v for v os measurements. for reference, 10v/60v is 136db, 10v/30v is 130db, and 10v/5v is 114db. electrical characteristics downloaded from: http:///
ltc2057/ltc2057hv 8 2057f for more information www.linear.com/ltc2057 input offset voltage distribution input offset voltage distribution input offset voltage distribution input offset voltage drift distribution input offset voltage drift distribution input offset voltage drift distribution typical performance characteristics input offset voltage vs input common mode voltage input offset voltage vs input common mode voltage input offset voltage vs input common mode voltage v cm (v) ?1 ?5 ?4 ?3 ?2 ?1 v os (v) 0 1 53 42 0 1 2 3 4 5 2057 g07 5 typical unitsv s = 5v t a = 25c v cm (v) 0 ?5 ?4 ?3 ?2 ?1 v os (v) 0 1 5 3 42 5 10 15 20 25 30 2057 g08 5 typical unitsv s = 30v t a = 25c v cm (v) 0 ?5 ?4 ?3 ?2 ?1 v os (v) 0 1 5 3 42 10 20 30 40 50 60 2057 g09 5 typical unitsv s = 60v t a = 25c v os (v) ?3 ?2.5 0 5 10 number of amplifiers 15 20 4030 3525 ?2 ?1.5 ?1 ?0.5 0 0.5 1 1.5 2 2.5 3 2057 g01 160 typical units v s = 2.5v = ?0.441 v = 0.452v v os (v) ?3 ?2.5 0 5 10 number of amplifiers 15 20 3530 25 ?2 ?1.5 ?1 ?0.5 0 0.5 1 1.5 2 2.5 3 2057 g02 160 typical units v s = 15v = ?0.432 v = 0.525v v os (v) ?3 ?2.5 0 5 10 number of amplifiers 15 20 3530 25 ?2 ?1.5 ?1 ?0.5 0 0.5 1 1.5 2 2.5 3 2057 g03 160 typical units v s = 30v = ?0.507 v = 0.548v v os tc (nv/c) 1 0 10 20 number of amplifiers 30 40 9060 70 8050 3 5 7 9 11 13 15 17 19 2057 g04 160 typical units v s = 2.5v t a = ?40c to 125c = 1.16nv/c = 0.97nv/c v os tc (nv/c) 1 0 10 20 number of amplifiers 30 40 8060 7050 3 5 7 9 11 13 15 17 19 2057 g05 160 typical units v s = 15v t a = ?40c to 125c = 1.29nv/c = 1.14nv/c v os tc (nv/c) 1 0 10 20 number of amplifiers 30 40 9080 60 7050 3 5 7 9 11 13 15 17 19 2057 g06 160 typical units v s = 30v t a = ?40c to 125c = 1.32nv/c = 1.26nv/c downloaded from: http:///
ltc2057/ltc2057hv 9 2057f for more information www.linear.com/ltc2057 typical performance characteristics dc to 10hz voltage noise dc to 10hz voltage noise input voltage noise spectrum input offset voltage vs supply voltage long-term input offset voltage drift input bias current vs supply voltage input bias current vs input common mode voltage input bias current vs input common mode voltage input bias current vs temperature v s (v) 0 ?5 ?4 ?3 ?2 ?1 v os (v) 0 1 5 3 42 10 20 30 40 50 5 15 25 35 45 55 65 60 2057 g09 5 typical unitsv cm = v s /2 t a = 25c temperature (c) ?50 0.01 0.1 1 10 i b (na) 100 ?25 0 25 50 75 100 125 150 2057 g12 v s = 2.5v v s = 15v v s = 30v v cm = 0v v cm (v) 0 ?50 ?40 ?30 ?20 ?10 i b (pa) 0 10 50 30 4020 1 1.5 0.5 2 2.5 3 4 3.5 2057 g13 i b (?in) i b (+in) v s = 5v t a = 25c v cm (v) 0 ?50 ?40 ?30 ?20 ?10 i b (pa) 0 10 50 30 4020 10 20 30 40 50 60 2057 g14 v s = 30v, 60v t a = 25c i b (?in), v s = 60v i b (+in), v s = 60v i b (?in), v s = 30v i b (+in), v s = 30v v s (v) 0 ?50 ?40 ?30 ?20 ?10 i b (pa) 0 10 50 30 4020 10 20 30 40 50 70 60 2057 g15 i b (?in) i b (+in) v cm = v s /2 t a = 25c time (hours) 1 ?5 ?4 ?3 ?2 ?1 v os (v) 0 1 5 3 42 10 100 1000 2057 g10 40 typical unitsv s = 2.5v time (1s/div) input-reffered voltage noise (100nv/div) 2057 g16 v s = 2.5v time (1s/div) input-reffered voltage noise (100nv/div) 2057 g17 v s = 30v frequency (hz) 0.1 0 5 10 15 20 3025 input-referred voltage noise density (nv/ hz ) 35 1 10 100 1k 10k 100k 1m 2057 g18 v s = 2.5v v s = 30v a v = +11 downloaded from: http:///
ltc2057/ltc2057hv 10 2057f for more information www.linear.com/ltc2057 typical performance characteristics input current noise spectrum common mode rejection ratio vs frequency power supply rejection ratio vs frequency closed loop gain vs frequency gain/phase vs frequency gain/phase vs frequency frequency (hz) 0.1 0 0.05 0.10 0.200.15 input-referred current noise density (pa/ hz ) 0.25 1 10 100 1k 10k 2057 g19 v s = 2.5v v s = 30v a v = +11 frequency (hz) 100 0 20 6040 100 80 cmrr (db) 120 1000 1k 10k 100k 1m 2057 g20 v s = 30v v cm = v s /2 frequency (hz) 10k ?40 ?20 0 6040 20 gain (db) phase (db) 80 ?30 ?10 5030 10 70 ?210 ?150 ?90 9030 ?30 150 ?180 ?120 600 ?60 120 100k 1m 10m 2057 g23 v s = 2.5v r l = 1k c l = 50pf c l = 200pf phase gain frequency (hz) 100 ?20 0 20 6040 100 80 psrr (db) 120 1k 10k 100k 1m 10m 2057 g21 v s = 30v v cm = v s /2 +psrr ?psrr frequency (hz) 10k ?40 ?20 0 6040 20 gain (db) phase (db) 80 ?30 ?10 5030 10 70 ?210 ?150 ?90 9030 ?30 150 ?180 ?120 600 ?60 120 100k 1m 10m 2057 g24 v s = 30v r l = 1k c l = 50pf c l = 200pf phase gain frequency (hz) 1k ?30 ?20 ?10 2010 0 4030 closed loop gain (db) 50 10k 100k 1m 10m 2057 g22 v s = 15v r l = 10k a v = +1 a v = +10 a v = +100 a v = ?1 downloaded from: http:///
ltc2057/ltc2057hv 11 2057f for more information www.linear.com/ltc2057 typical performance characteristics shutdown transient with sinusoid input start-up transient with sinusoid input shutdown transient with sinusoid input time (s) ?10 31 sd ? sdcom (v) supply current (ma) input voltage (v) output voltage (v) 4 20 ?0.2 0 0.1 0.2 0.3 0.4?0.1 0 10 30 20 40 50 2057 g26 v s = 30v, a v = +1 sd C?sdcom i ss v in v out start-up transient with sinusoid input closed loop output impedance vs frequency closed loop output impedance vs frequency frequency (hz) 100 0.01 0.1 100 10 1 z out () 1000 1k 10k 100k 1m 10m 2057 g29 a v = +100 a v = +1 v s = 2.5v a v = +10 frequency (hz) 100 0.01 0.1 100 10 1 z out () 1000 1k 10k 100k 1m 10m 2057 g30 a v = +1 a v = +100 a v = +10 v s = 30v thd+n vs amplitude output amplitude (v rms ) 0.01 0.0001 0.01 0.001 thd+n (%) 0.1 0.1 1 10 2057 g31 f in = 1khz v s = 15v a v = +1 r l = 10k bw = 80khz time (s) ?10 31 sd ? sdcom (v) supply current (ma) input voltage (v) output voltage (v) 4 20 ?0.2 0 0.2 0.4?0.1 0.1 0.3 0 10 30 20 40 50 2057 g25 sd C?sdcom i ss v in v out v s = 2.5v, a v = +1 time (s) ?10 31 sd ? sdcom (v) supply current (ma) input voltage (v) output voltage (v) 4 20 ?0.3 ?0.1 0.1 0.3?0.2 0.1 0.40.2 0 10 30 20 40 50 60 70 2057 g27 sd C?sdcom i ss v in v out v s = 2.5v a v = +1 time (s) ?10 31 sd ? sdcom (v) supply current (ma) input voltage (v) output voltage (v) 4 20 ?0.3 ?0.1 0.1 0.3?0.2 0 0.40.2 0 10 30 20 40 70 50 60 2057 g28 v s = 30v a v = +1 sd C?sdcom i ss v in v out downloaded from: http:///
ltc2057/ltc2057hv 12 2057f for more information www.linear.com/ltc2057 typical performance characteristics thd+n vs frequency supply current vs supply voltage supply current vs temperature shutdown supply current vs supply voltage v s (v) 0 0 21 43 65 7 98 i s (a) 10 5 10 15 20 25 30 35 45 50 55 40 60 2057 g35 ?55c ?40c 25c 85c 125c 150c sd = sdcom = v s /2 supply current vs shutdown control voltage supply current vs shutdown control voltage sd ? sdcom (v) 0 0 0.2 0.4 0.6 0.8 1.21.0 i s (ma) 1.6 1.4 0.5 1 1.5 2 2.5 3 3.5 4.5 4 5 2057 g37 ?40c ?55c 25c 85c 125c 150c v s = 30v sdcom = 0v shutdown pin current vs shutdown pin voltage sd ? sdcom (v) 0 ?5 ?3?4 ?2 ?1 0 21 3 shutdown pin current (a) 5 4 0.5 1 1.5 2 2.5 3 3.5 4.5 4 5 2057 g38 v s = 30v sdcom = 0v i sd ?50c i sdcom ?50c i sd 125c i sdcom 125c shutdown pin current vs supply voltage v s (v) 0 ?1.0 ?0.8 ?0.6 ?0.4 ?0.2 0.2 0 shutdown pin current (a) 1.0 0.4 0.6 0.8 5 10 15 20 25 30 35 45 40 55 50 60 2057 g39 i sdcom ?55c i sdcom 25c i sdcom 150c i sd ?55c sd = sdcom = v s /2 i sd 25c i sd 150c no phase reversal v s (v) 0 0 0.40.2 0.80.6 1.21.0 i s (ma) 1.4 5 10 15 20 25 30 35 45 50 55 40 60 2057 g33 ?55c ?40c 25c 85c 125c 150c temperature (c) ?60 0 0.40.2 0.80.6 1.21.0 i s (ma) 1.4 ?30 0 30 60 90 120 150 2057 g34 30v 2.5v 15v frequency (hz) 10 0.0001 0.01 0.001 thd+n (%) 0.1 100 1000 10000 2057 g32 v out = 2v rms v s = 15v a v = +1 r l = 10k bw = 80khz sd ? sdcom (v) 0 0 0.2 0.4 0.6 0.8 1.21.0 i s (ma) 1.4 0.5 1 1.5 2 2.5 3 3.5 4.5 4 5 2057 g36 ?40c ?55c 25c 85c 125c 150c v s = 2.5v sdcom = ?2.5v 0.2ms/div ?20 ?15 ?10 ?5 50 voltage (v) 20 10 15 2057 g40 a v = +1 v s = 15v v in = 16v r in = 1k v in v out downloaded from: http:///
ltc2057/ltc2057hv 13 2057f for more information www.linear.com/ltc2057 typical performance characteristics output voltage swing high vs load current output voltage swing high vs load current output voltage swing high vs load current output voltage swing low vs load current output voltage swing low vs load current output voltage swing low vs load current short-circuit current vs temperature short-circuit current vs temperature short-circuit current vs temperature i source (ma) 0.001 0.1m 1m 0.1 10m v + ? v oh (v) 10 1 0.01 0.1 1 10 100 2057 g41 ?40c 25c v s = 2.5v 85c 125c 150c i source (ma) 0.001 0.1m 1m 0.1 10m v + ? v oh (v) 100 10 1 0.01 0.1 1 10 100 2057 g42 ?40c v s = 15v 85c 125c 25c 150c i sink (ma) 0.001 0.1m 1m 0.1 10m v ol ? v ? (v) 10 1 0.01 0.1 1 10 100 2057 g44 ?40c v s = 2.5v 25c 150c 85c 125c i sink (ma) 0.001 0.1m 1m 0.1 10m v ol ? v ? (v) 100 10 1 0.01 0.1 1 10 100 2057 g45 v s = 15v ?40c 25c 85c 150c 125c i sink (ma) 0.001 0.1m 1m 0.1 10m v ol ? v ? (v) 100 10 1 0.01 0.1 1 10 100 2057 g46 v s = 30v ?40c 25c 85c 150c 125c temperature (c) ?50 0 10 20 30 5040 i sc (ma) 60 ?25 0 25 125 150 75 50 100 2057 g47 v s = 2.5v sinking sourcing temperature (c) ?50 0 10 20 30 5040 i sc (ma) 60 ?25 0 25 125 150 75 50 100 2057 g48 v s = 15v sinking sourcing temperature (c) ?50 0 10 20 30 5040 i sc (ma) 60 ?25 0 25 125 150 75 50 100 2057 g49 v s = 30v sinking sourcing i source (ma) 0.001 0.1m 1m 0.1 10m v + ? v oh (v) 100 10 1 0.01 0.1 1 10 100 2057 g43 ?40c v s = 30v 25c 85c 125c 150c downloaded from: http:///
ltc2057/ltc2057hv 14 2057f for more information www.linear.com/ltc2057 typical performance characteristics large signal response large signal response large signal response time (s) ?4 ?0.6 ?0.4 ?0.2 0 0.40.2 v out (v) 0.6 ?2 0 2 10 16 6 4 8 14 12 2057 g50 v s = 2.5v v in = 0.5v a v = +1 c l = 200pf time (s) ?10 ?6 ?4 ?2 0 42 v out (v) 6 0 10 50 80 30 20 40 70 60 2057 g51 v s = 15v v in = 5v a v = +1 c l = 200pf time (s) ?20 ?12 ?10 ?8 ?6 ?4 ?2 0 10 8 v out (v) 12 42 6 0 20 100 160 60 40 80 140 120 2057 g52 v s = 30v v in = 10v a v = +1 c l = 200pf small signal response small signal response small signal response time (s) ?2 ?70 ?50 ?30 ?10 10 30 50 v out (mv) 70 ?1 0 4 7 2 1 3 6 5 2057 g53 c l = 200pf v s = 2.5v v in = 50mv a v = +1 time (s) ?2 ?70 ?50 ?30 ?10 10 30 50 v out (mv) 70 ?1 0 4 7 2 1 3 6 5 2057 g54 c l = 200pf v s = 15v v in = 50mv a v = +1 time (s) ?2 ?70 ?50 ?30 ?10 10 30 50 v out (mv) 70 ?1 0 4 7 2 1 3 6 5 2057 g55 c l = 200pf v s = 30v v in = 50mv a v = +1 c l (pf) 10 0 10 15 20 5 25 3530 overshoot (%) 40 100 1000 2057 g56 ?os +os v s = 2.5v v in = 100mv a v = +1 small signal overshoot vs load capacitance small signal overshoot vs load capacitance small signal overshoot vs load capacitance c l (pf) 10 0 10 15 5 25 3530 20 overshoot (%) 40 100 1000 2057 g57 ?os +os v s = 15v v in = 100mv a v = +1 c l (pf) 10 0 10 15 5 25 3530 20 overshoot (%) 40 100 1000 2057 g58 ?os +os v s = 30v v in = 100mv a v = +1 downloaded from: http:///
ltc2057/ltc2057hv 15 2057f for more information www.linear.com/ltc2057 typical performance characteristics time (s) ?5 0 v in (v) v out (mv) 2 1 ?2 2 6 100 4 128 0 5 15 10 20 60 25 30 35 40 45 50 55 2057 g59 a v = ?1 r f = 10k v s = 15v v in v out v out(avg) large signal settling transient large signal settling transient time (s) ?5 0 v in (v) v out (mv) 2 1 ?4 0 4 8?2 2 106 0 5 15 10 20 60 25 30 35 40 45 50 55 2057 g60 a v = ?1 r f = 10k v s = 15v v in v out v out(avg) output overload recovery output overload recovery output overload recovery output overload recovery time (s) ?20 v in (v) v out (v) 0.5 ?0.5 0 ?3 ?1?2 0 ?10 0 20 10 30 80 40 50 60 70 2057 g61 v in v s = 2.5v a v = ?100 r f = 10k c l = 100pf v out time (s) C5 v in (v) v out (v) 1 C1 0 C18 C12C15 C9 C6 C3 0 0 5 15 10 20 45 25 30 35 40 2057 g62 v out v in v s = 15v a v = C100 r f = 10k c l = 100pf time (s) C10 v in (v) v out (v) 2 C2 0 C35 C25 0C30 C20 C15 C10 C5 0 10 30 20 40 90 50 60 70 80 2057 g63 v out v in v s = 30v a v = C100 r f = 10k c l = 100pf time (s) v in (v) v out (v) 0.5 C0.5 0 C1 1 30 2 C10 0 20 10 30 80 40 50 60 70 2057 g64 v out v in v s = 2.5v a v = C100 r f = 10k c l = 100pf output overload recovery output overload recovery time (s) C10 v in (v) v out (v) 1 C1 0 C3 30 6 9 12 15 0 10 30 20 40 100 50 60 70 80 90 2057 g65 v out v in v s = 15v a v = C100 r f = 10k c l = 100pf time (s) C20 v in (v) v out (v) 2 C2 0 C5 5 300 10 15 20 25 0 20 60 40 80 140 100 120 2057 g66 v out v in v s = 30v a v = C100 r f = 10k c l = 100pf downloaded from: http:///
ltc2057/ltc2057hv 16 2057f for more information www.linear.com/ltc2057 pin functions ms8 and s8/dd8sd (pin 1/pin 1): shutdown control pin. Cin (pin 2/pin 2): inverting input. +in (pin 3/pin 3): non-inverting input. v C (pin 4/pin 4, 9): negative power supply. ms10 grd (pin 1): guard ring. no internal connection. Cin (pin 2): inverting input. +in (pin 3): non-inverting input. grd (pin 4): guard ring. no internal connection. v C (pin 5): negative power supply. sdcom (pin 8/pin 8): reference voltage for sd . v + (pin 7/pin 7): positive power supply. out (pin 6/pin 6): amplifier output nc (pin 5/pin 5): no internal connection. sd (pin 10): shutdown control pin. sdcom (pin 9): reference voltage for sd . v + (pin 8): positive power supply. nc (pin 7): no internal connection. out (pin 6): amplifier output. downloaded from: http:///
ltc2057/ltc2057hv 17 2057f for more information www.linear.com/ltc2057 block diagrams 10k10k sd sdcom 2057 bd2 v + v C v + v C 0.5a 0.5a 5.25v v th 1.4v v + v ? sd + ? + ? amplifier shutdown circuit v + v C 525 525 Cin+in 2057 bd1 v + v C v + v C + C out v + v C downloaded from: http:///
ltc2057/ltc2057hv 18 2057f for more information www.linear.com/ltc2057 applications information input voltage noise chopper stabilized amplifiers like the ltc2057 achieve low offset and 1/ f noise by heterodyning dc and flicker noise to higher frequencies. in a classical chopper stabilized amplifier, this process results in idle tones at the chopping frequency and its odd harmonics. the ltc2057 utilizes circuitry to suppress these spurious artifacts to well below the offset voltage. the typical ripple magnitude at 100khz is much less than 1v rms . the voltage noise spectrum of the ltc2057 is shown in figure 1. if lower noise is required, consider one of the following circuits from the typical applications section: "dc stabilized, ultralow noise amplifier" or " paralleling choppers to improve noise." it is important to note that the current noise is not equal to 2 q i b . this formula is relevant for base current in bipolar transistors and diode currents, but for most chopper and auto-zero amplifiers with switched inputs, the dominant current noise mechanism is not shot noise.input bias current as illustrated in figure 3, the ltc2057s input bias current originates from two distinct mechanisms. below 75 c, input bias current is nearly constant with temperature, and is caused by charge injection from the clocked input switches used in offset correction. figure 1. input voltage noise spectrum input current noise for applications with high source impedances, input cur- rent noise can be a significant contributor to total output noise. for this reason, it is important to consider noise current interaction with circuit elements placed at an amplifiers inputs. the current noise spectrum of the ltc2057 is shown in figure 2. the characteristic curve shows no 1/ f behavior. as with all zero-drift amplifiers, there is a significant cur - rent noise component at the offset-nulling frequency. this phenomenon is discussed in the input bias current section . figure 2. input current noise spectrum figure 3. input bias current vs temperature frequency (hz) 0.1 0 5 10 15 20 input voltage noise density (nv/ hz ) 25 30 35 1 10 100 1k 10k 100k 1m 2057 f01 a v = +11 v s = 2.5v no 1/f noise frequency (hz) 0.1 0 0.05 0.01 0.15 0.20 input current noise density (pa/ hz ) 0.25 1 10 100 1k 10k 2057 f02 no 1/f noise a v = +11 v s = 2.5 temperature (c) C50 0.01 0.1 1 10 i b (na) 100 C25 0 25 50 75 100 125 150 2057 f03 leakage current 25c max i b spec injection current 1 typical unitv s = 2.5v downloaded from: http:///
ltc2057/ltc2057hv 19 2057f for more information www.linear.com/ltc2057 applications information the dc average of injection current is the specified input bias current, but this current has a frequency component at the chopping frequency as well. when these small current pulses, typically about 0.7 na rms , interact with source impedances or gain setting resistors, the resulting voltage spikes are amplified by the closed loop gain. for high impedances, this may cause the 100 khz chopping frequency to be visible in the output spectrum, which is a phenomenon known as clock feed-through.for zero - drift amplifiers, clock feed - through will be proportional to source impedance and the magnitude of injection current, a measure of which is i b at 25 c. in order to minimize clock feed-through, keep gain-setting resistors and source impedances as low as possible. if high impedances are required, place a capacitor across the feedback resistor to limit the bandwidth of the closed loop gain. doing so will effectively filter out the clock feed-through signal. injection currents from the two inputs are of equal magni - tude but opposite direction. therefore, input bias current effects due to injection currents will not be canceled by placing matched impedances at both inputs.above 75 c , leakage of the esd protection diodes begins to dominate the input bias current and continues to increase exponentially at elevated temperatures. unlike injection current, leakage currents are in the same direction for both inputs. therefore, the output error due to leakage currents can be mitigated by matching the source impedances seen by the two inputs.thermocouple effects in order to achieve accuracy on the microvolt level, ther - mocouple effects must be considered. any connection of dissimilar metals forms a thermoelectric junction and generates a small temperature-dependent voltage. also known as the seebeck effect, these thermal emfs can be the dominant error source in low-drift circuits. connectors, switches, relay contacts, sockets, resistors, and solder are all candidates for significant thermal emf generation. even junctions of copper wire from different manufacturers can generate thermal emfs of 200 nv/c, which is over 13 times the maximum drift specification of the ltc2057. figures 4 and 5 illustrate the potential magni - tude of these voltages and their sensitivity to temperature. in order to minimize thermocouple-induced errors, atten- tion must be given to circuit board layout and component selection. it is good practice to minimize the number of junctions in the amplifier s input signal path and avoid con - nectors, sockets, switches, and relays whenever possible. if such components are required, they should be selected for low thermal emf characteristics. furthermore, the number, type, and layout of junctions should be matched for both inputs with respect to thermal gradients on the circuit board. doing so may involve deliberately introducing dummy junctions to offset unavoidable junctions. figure 4. thermal emf generated by two copper wires from different manufacturers figure 5. solder-copper thermal emfs temperature (c) 25 microvolts referred to 25c 1.8 2.4 3.02.8 2.6 2.0 2.21.4 1.6 0.800 1.0 0.200 0.400 30 40 45 2057 f04 1.2 0.600 0 35 solder-copper junction differential temperature source: new electronics 02-06-77 0 thermally produced voltage in microvolts 0 50 40 2057 f05 C50 C100 10 20 30 50 100 slope 1.5v/c below 25c slope 160nv/c below 25c 64% sn/36% pb 60% cd/40% sn downloaded from: http:///
ltc2057/ltc2057hv 20 2057f for more information www.linear.com/ltc2057 applications information figure 7a. example layout of non-inverting amplifier with leakage guard ring leakage current high-z sensor guard ring no solder mask over guard ring v C v C grd +in grdCin out nc v + v + v out sd sdcom * * no leakage current. v +in = v grd ** v error = i leak ? r g ; r g << z sensor r f v bias r g ** 2057 f07a + C r in high-z sensor guard ring ? leakage current alternative guard ring drive alternative guard ring drive circuit if r g must be high impedance. ? v in v out v bias r g r f ltc2057 r f + C v + v C r g r f r g = r' f r' g ; r' g << r g ltc2057 ms10 figure 6. techniques for minimizing thermocouple-induced errors ltc2057 thermal gradient relay matching relay nc * cut slots in pcb for thermal isolation. ** introduce dummy junctions and components to offset unavoidable junctions or cancel thermal emfs. ? align inputs symmetrically with respect to thermal gradients. ? introduce dummy traces and components for symmetrical thermal heat sinking. loads and feedback can dissipate power and generate thermal gradients. be aware of their thermal effects. # cover circuit to prevent air currents from creating thermal gradients. heat source/ power dissipator r l Cin+in r f r g r f v in * r g 2057 f06 ** ? ? ** # + C + C v thermal v thermal downloaded from: http:///
ltc2057/ltc2057hv 21 2057f for more information www.linear.com/ltc2057 applications information figure 7b. example layout of inverting amplifier with leakage guard ring high-z sensor low impedance node absorbs leakage current guard ring leakage current v C v C grd +in grdCin out nc v + v + v out sd sdcom ? ? no leakage current. v Cin = v grd avoid dissipating significant amounts of power in this resistor. it will generate thermal gradients with respect to the input pins and lead to thermocouple-induced error. thermally isolate or align with inputs if resistor will cause heating. v bias r f 2057 f07b ltc2057 ms10 no solder mask over guard ring + C guard ring ltc2057 leakage current leakage current is absorbed by ground instead ofcausing a measurement error. v out v + v C high-z sensor r f v bias + C v in r in air currents can also lead to thermal gradients and cause significant noise in measurement systems. it is important to prevent airflow across sensitive circuits. doing so will often reduce thermocouple noise substantially. a summary of techniques can be found in figure 6. leakage effects leakage currents into high impedance signal nodes can easily degrade measurement accuracy of sub-nanoamp signals. high voltage and high temperature applications are especially susceptible to these issues. quality insula - tion materials should be used, and insulating surfaces should be cleaned to remove fluxes and other residues. for humid environments, surface coating may be neces - sary to provide a moisture barrier. board leakage can be minimized by encircling the input connections with a guard ring operated at a potential very close to that of the inputs. the ring must be tied to a low impedance node. for inverting configurations, the guard ring should be tied to the potential of the positive input (+in). for non-inverting configurations, the guard ring should be tied to the potential of the negative input (C in). in order for this technique to be effective, the guard ring must not be covered by solder mask. ringing both sides of the printed circuit board may be r equired. see figures 7 a and 7 b for examples of proper layout.for low-leakage applications, the ltc2057 is available in an ms10 package with a special pinout that facilitates the layout of guard ring structures. the pins adjacent to the inputs have no internal connection, allowing a guard ring to be routed through them. downloaded from: http:///
ltc2057/ltc2057hv 22 2057f for more information www.linear.com/ltc2057 applications information power dissipation since the ltc2057/ltc2057hv is capable of operating at >30v total supply, care should be taken with respect to power dissipation in the amplifier. when driving heavy loads at high voltages, use the ja of the package to estimate the resulting die-temperature rise and take measures to ensure that the resulting junction temperature does not exceed specified limits. pcb metallization and heat sinking should also be considered when high power dissipation is expected. thermal information for all packages can be found in the pin configuration section. electrical overstress absolute maximum ratings should not be exceeded. avoid driving the input and output pins beyond the rails, especially at supply voltages approaching 60 v. if these fault conditions cannot be prevented, a series resistor at the pin of interest should help to limit the input current and reduce the possibility of device damage. this technique is shown in figure 8. keep the value of the current limiting resistance as low as possible to avoid adding noise and error voltages from interaction with input bias currents but high enough to protect the device. resistances up to 2 k will not seriously impact noise or precision. shutdown mode the ltc2057/ ltc2057hv features a shutdown mode for low-power applications. in the off state, the amplifier draws less than 11 a of supply current under all normal operating conditions, and the output presents a high- impedance to external circuitry. shutdown control is accomplished through differential signaling. this method allows for low voltage digital control logic to operate independently of the amplifiers high voltage supply rails. shutdown operation is accomplished by tying sdcom to logic ground and sd to a 3 v or 5 v logic signal. a sum - mary of control logic and operating ranges is shown in t ables 1 and 2. table 1. shutdown control logic shutdown pin condition amplifier state sd = float, sdcom = float on sd C sdcom > 2v on sd C sdcom < 0.8v off table 2. operating voltage range for shutdown pins min max sd C sdcom C0.2v 5.2v sdcom v C v + C2v sd v C v + if the shutdown feature is not required, sd and sdcom may be left floating. internal cir cuitry will automatically keep the amplifier in the on state. for operation in noisy environments, a capacitor between sd and sdcom is recommended to prevent noise from changing the shutdown state. when there is a danger of sd and sdcom being pulled beyond the supply rails, resistance in series with the shut - down pins is recommended to limit the resulting current. figure 8. using a resistor to limit input current 2057 f08 + C r in limits i overload to <10ma for v in < 10v outside of the supply rails. out ltc2057 v in v + v C r in 1k i overload downloaded from: http:///
ltc2057/ltc2057hv 23 2057f for more information www.linear.com/ltc2057 typical applications dc stabilized, ultralow noise composite amplifier low-side current sense amplifier 2057 ta02 r g 20 v in v out 20v 20v 20v 20k r f 2k 47nf 1k 8 C20v C20v ltc2057hv + C lt1037 + C 1m? a v = r f r g + 1 = 101 composite amplifier combines the excellent broadband noise performance of the lt1037 with the zero-drift properties of the ltc2057. the resulting circuit has microvolt accuracy, suppressed 1/f noise, and low broadband noise. 2057 ta03 + C 10 1k 28v 1n4148 or equivalent optionalshort v out v out = 101 ? r sense ? i sense ltc2057 v sense i sense 10? r sense +C frequency (hz) 0.1 1 0 10 input voltage noise density (nv/ hz ) 2018 16 14 12 86 4 2 10 100 2057 ta02b low-side current sense amplifier transfer function input voltage noise spectrum of composite amplifier v sense (v) 0 0 1.0 2.0 3.0 v out (mv) 3.50.5 1.5 2.5 5 10 20 15 25 30 2057 ta03b diode not shorteddiode shorted ideal transfer function amplifier output saturateswith diode shorted downloaded from: http:///
ltc2057/ltc2057hv 24 2057f for more information www.linear.com/ltc2057 typical applications paralleling choppers to improve noise C + r5 r2 r1r1 ltc2057 v in v out 2057 ta04 C + r5 r2 ltc2057 r1 C + r5 r2 ltc2057 r1 dc to 10hz noise = where n is the number of paralleled input amplifiers. for n = 4, dc to 10hz noise = 100nv p-p , e n = 5.5nv / hz , i n = 340fa/ hz , i b < 800pa (max). r 5 should be a few hundred ohms to isolate amplifier outputs without contributing significantly to noise or i b -induced error. , i n = n ? 170f a / hz , i b < n ? 200pa (max) , e n = 200nv p-p n ? + r5 r2 ltc2057 r3 ? + r4 ltc2057 11nv/ hz n a v = ? r2 r1 + 1 r4 r3 + 1 >> n for output amplifier noise to be insignificant. r2 r1 + 1 downloaded from: http:///
ltc2057/ltc2057hv 25 2057f for more information www.linear.com/ltc2057 typical applications ultra-precision, 135db dynamic range photodiode amplifier output noise spectrum of photodiode amplifier noise floor is only slightly above the 20k? resistor`s 18nv/ hz . clock feedthrough is visible near 100khz with amplitude of 10v rms output referred or 0.5na rms input referred. wide input range precision gain-of-100 instrumentation amplifier C + 52v C1v 68pfpd i pd v out 20k 30pf ltc2057hv 2057 ta06 v out = i pd ? 20k? bw = 300khz output range 9v to 50v, limit bw to 1khz to keep output noise below 5v p-p frequency (hz) 1k 0 output noise voltage density (nv / hz ) 320280 200 160 240120 8040 400360 100k 2057 ta06b 10k rbw = 1khz 30v C30v Cin+in 30v 11.5k 11.5k C30v 2057 ta01a ltc2057hv ltc2057hv m9m3 m1 input cm range = 28v with 4v of output swing cmrr = 130db (typ), input offset voltage = 1v (typ) +C C + 89 10 p1p3 p9 lt1991a 18v C18v ref out 6 5 4 7 v out v cc v ee 232 12 3 downloaded from: http:///
ltc2057/ltc2057hv 26 2057f for more information www.linear.com/ltc2057 typical applications differential thermocouple amplifier v C C15v C15v 15v 15v gnd v in v + v o r C lt1025 2057 ta07 + (yellow)C (red) 499k C + ltc2057 lt1991a v cc v ee ref out m9m3 m1 7 6 v out = 10mv/c v cm 10nf 249k 1% 1k 1% 22 0.1f 1k 1% p1p3 p9 89 10 12 3 100k couple thermally type k thermocouple temp ofC200c to 1250c gives C2v to 12.5v v out assuming 40v/c tempco. check actual tempco table. v cm = v C + 0.1v to v + C 1.5v (small signal) cmrr = 122db (0.02c error per volt) 5 4 downloaded from: http:///
ltc2057/ltc2057hv 27 2057f for more information www.linear.com/ltc2057 typical applications 18-bit dac with 25v output swing 2057 ta08 30vC30v 8pf 30vC30v v out + C r fb i out1 i out2 gnd r ofs r com r in v dd gnd ref ltc2057hv C + ltc2057hv lt5400-1 10k matched resistor network + C lt1012 150pf 5v ltc2756 18-bit dac with span select set span to 10v 0.1f 4 spi with readback ref 5v time domain response time (50s/div) v cs /ld (v) 10 0 5 C30 C20 C10 0 10 20 30 2057 ta09 v out v cs /ld v out (v) downloaded from: http:///
ltc2057/ltc2057hv 28 2057f for more information www.linear.com/ltc2057 package description dd8 package 8-lead plastic dfn (3mm 3mm) (reference ltc dwg # 05-08-1698 rev c) 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 0.40 0.10 bottom viewexposed pad 1.65 0.10 (2 sides) 0.75 0.05 r = 0.125 typ 2.38 0.10 1 4 8 5 pin 1 top mark (note 6) 0.200 ref 0.00 C 0.05 (dd8) dfn 0509 rev c 0.25 0.05 2.38 0.05 recommended solder pad pitch and dimensions apply solder mask to areas that are not soldered 1.65 0.05 (2 sides) 2.10 0.05 0.50bsc 0.70 0.05 3.5 0.05 packageoutline 0.25 0.05 0.50 bsc please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. downloaded from: http:///
ltc2057/ltc2057hv 29 2057f for more information www.linear.com/ltc2057 package description ms8 package 8-lead plastic msop (reference ltc dwg # 05-08-1660 rev f) msop (ms8) 0307 rev f 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 ? 0.38 (.009 ? .015) typ 0.1016 0.0508 (.004 .002) 0.86 (.034) ref 0.65 (.0256) bsc 0 ? 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 ? 3.45 (.126 ? .136) 0.889 0.127 (.035 .005) recommended solder pad layout 0.42 0.038 (.0165 .0015) typ 0.65 (.0256) bsc please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. downloaded from: http:///
ltc2057/ltc2057hv 30 2057f for more information www.linear.com/ltc2057 package description ms package 10-lead plastic msop (reference ltc dwg # 05-08-1661 rev e) msop (ms) 0307 rev e 0.53 0.152 (.021 .006) seating plane 0.18 (.007) 1.10 (.043) max 0.17 C?0.27 (.007 C .011) typ 0.86 (.034) ref 0.50 (.0197) bsc 1 2 3 4 5 4.90 0.152 (.193 .006) 0.497 0.076 (.0196 .003) ref 8910 7 6 3.00 0.102 (.118 .004) (note 3) 3.00 0.102 (.118 .004) (note 4) 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 0.254 (.010) 0 C 6 typ detail a detail a gauge plane 5.23 (.206) min 3.20 C 3.45 (.126 C .136) 0.889 0.127 (.035 .005) recommended solder pad layout 0.305 0.038 (.0120 .0015) typ 0.50 (.0197) bsc 0.1016 0.0508 (.004 .002) please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. downloaded from: http:///
ltc2057/ltc2057hv 31 2057f 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. package description please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. .016 C .050 (0.406 C 1.270) .010 C .020 (0.254 C 0.508) 45 0 C 8 typ .008 C .010 (0.203 C 0.254) so8 rev g 0212 .053 C .069 (1.346 C 1.752) .014 C .019 (0.355 C 0.483) typ .004 C .010 (0.101 C 0.254) .050 (1.270) bsc 1 2 3 4 .150 C .157 (3.810 C 3.988) note 3 8 7 6 5 .189 C .197 (4.801 C 5.004) note 3 .228 C .244 (5.791 C 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) 4. pin 1 can be bevel edge or a dimple s8 package 8-lead plastic small outline (narrow .150 inch) (reference ltc dwg # 05-08-1610 rev g) downloaded from: http:///
ltc2057/ltc2057hv 32 2057f linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax : (408) 434-0507 www.linear.com/ltc2057 ? linear technology corporation 2013 lt 0513 ? printed in usa related parts typical application part number description comments ltc2050hv zero-drift operational amplifier 3v v os , 2.7v to 12v v s , 1.5ma i s , rr output ltc2051hv/ltc2052hv dual/quad, zero-drift operational amplifier 3v v os , 2.7v to 12v v s , 1.5ma i s , rr output ltc2053 precision, rail-to-rail, zero-drift, resistor-programmable instrumentation amplifier 10v v os , 2.7v to 11v v s , 1.3ma i s , rrio ltc2054hv/ltc2055hv micropower, single/dual, zero-drift operational amplifier 5v v os , 2.7v to 12v v s , 0.2ma i s , rrio ltc6652 precision, low drift, low noise, buffered reference 5ppm/c, 0.05% initial accuracy, 2.1ppm p-p noise lt6654 precision, wide supply, high output drive, low noise reference 10ppm/c, 0.05% initial accuracy, 1.6ppm p-p noise ltc6655 0.25ppm noise, low drift, precision, buffered reference family 2ppm/c, 0.025% initial accuracy, 0.25ppm p-p noise lt6016/lt6017 dual/quad, 76v over-the- top ? input operational amplifier 50v v os , 3v to 50v v s , 0.335ma i s , rrio ltc6090 140v operational amplifier 50pa i b , 1.6mv v os , 9.5v to 140v v s , 4.5ma i s , rr output lt5400 quad matched resistor network 0.01%, 0.2ppm/c matching microvolt precision 18-bit adc driver + C 5v C5v C5v 2.5v 1.8v 10k 10 1% 150? 205? 50mv 0v ltc2057 2057 ta10 10nf 1f 100k1% sample chain rdl/sdi sdo sck busy cnv +inCin v dd ref ov dd gnd 0.1f 10f ltc6655-2.5 ltc2368-18 gnd v in shdn v out_f v out_s 47f 5v a v = 50 bw = 1khz 5 ksps is recommended to minimize error from adc input current and 150 resistor. resistor divider at adc input ensures live zero operation by accounting for 5v maximum v os of the ltc2057 and 11lsb zero-scale error of the adc. resulting offset is constant and can be subtracted from the result. downloaded from: http:///

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