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obsolete LM108AJAN www.ti.com snosaj6c ? february 2005 ? revised april 2013 LM108AJAN operational amplifiers check for samples: LM108AJAN 1 features description the lm108 is a precision operational amplifier having 2 ? maximum input bias current of 3.0 na over specifications a factor of ten better than fet temperature amplifiers over a ? 55 c to +125 c temperature ? offset current less than 400 pa over range. temperature the devices operate with supply voltages from 2v to ? supply current of only 300 a, even in 20v and have sufficient supply rejection to use saturation unregulated supplies. although the circuit is ? ensured drift characteristics interchangeable with, and uses the same compensation as the lm101a, an alternate compensation scheme can be used to make it particularly insensitive to power supply noise and to make supply bypass capacitors unnecessary. the low current error of the lm108 makes possible many designs that are not practical with conventional amplifiers. in fact, it operates from 10 m source resistances, introducing less error than devices such as the 709 with 10 k sources. integrators with drifts less than 500 v/sec and analog time delays in excess of one hour can be made using capacitors no larger than 1 f. connection diagrams *package is connected to pin 4 (v ? ) **unused pin (no internal connection) to allow for input anti-leakage guard ring on printed circuit board layout. figure 1. metal can package - to-99 figure 2. dual-in-line package (top view) package number lmc cdip - package number nab 1 please be aware that an important notice concerning availability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 all trademarks are the property of their respective owners. production data information is current as of publication date. copyright ? 2005 ? 2013, texas instruments incorporated products conform to specifications per the terms of the texas instruments standard warranty. production processing does not necessarily include testing of all parameters.
obsolete LM108AJAN snosaj6c ? february 2005 ? revised april 2013 www.ti.com figure 3. cdip - top view figure 4. clga top view package number j package number nac, nad schematic diagram 2 submit documentation feedback copyright ? 2005 ? 2013, texas instruments incorporated product folder links: LM108AJAN
obsolete LM108AJAN www.ti.com snosaj6c ? february 2005 ? revised april 2013 compensation circuits standard compensation circuit alternate frequency compensation **bandwidth and slew rate are proportional to 1/c s improves rejection of power supply noise by a factor of ten. c o = 30 pf **bandwidth and slew rate are proportional to 1/c f feedforward compensation these devices have limited built-in esd protection. the leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the mos gates. copyright ? 2005 ? 2013, texas instruments incorporated submit documentation feedback 3 product folder links: LM108AJAN
obsolete LM108AJAN snosaj6c ? february 2005 ? revised april 2013 www.ti.com absolute maximum ratings (1) supply voltage 22v to-99 metal can 8ld 330mw @ +125 c cdip 14ld 400mw @ +125 c power dissipation (2) cdip 8ld 400mw @ +125 c clga 10ld 330mw @ +125 c ceramic soic 10ld 330mw @ +125 c differential input current (3) 10 ma differential input voltage (4) 30v input voltage (5) 20v output short-circuit duration continuous operating temperature range ? 55 c t a +125 c storage temperature range ? 65 c t a +150 c to-99 metal can 8ld still air 150 c/w 500lf / min air flow 86 c/w cdip 14ld still air 94 c/w 500lf / min air flow 55 c/w cdip 8ld still air 120 c/w ja 500lf / min air flow 68 c/w cpack 10ld still air 225 c/w 500lf / min air flow 142 c/w thermal resistance ceramic soic 10ld still air 225 c/w 500lf / min air flow 142 c/w to-99 metal can 8ld 38 c/w cdip 14ld 13 c/w jc cdip 8ld 17 c/w clga 10ld 21 c/w ceramic soic 10ld 21 c/w to-99 metal can 8ld 990mg cdip 14ld 2,180mg package weight (typical) cdip 8ld 1,090mg clga 10ld 225mg ceramic soic 10ld 210mg maximum junction teperature 175 c lead temperature (soldering, 10 sec) 300 c esd tolerance (6) 2000v (1) absolute maximum ratings indicate limits beyond which damage to the device may occur. operating ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. for ensured specifications and test conditions, see the electrical characteristics. the specified specifications apply only for the test conditions listed. some performance characteristics may degrade when the device is not operated under the listed test conditions. (2) the maximum power dissipation must be derated at elevated temperatures and is dictated by t j max (maximum junction temperature), ja (package junction to ambient thermal resistance), and t a (ambient temperature). the maximum allowable power dissipation at any temperature is p d max = (t j max - t a ) / ja or the number given in the absolute maximum ratings, whichever is lower. (3) the inputs are shunted with back-to-back diodes for over voltage protection. therefore, excessive current will flow if a differential input voltage in excess of 1v is applied between the inputs unless some limiting resistance is used. (4) this rating is 1.0v unless resistances of 2k ? or greater are inserted in series with the inputs to limit current in the input shunt diodes to the maximum allowable value. (5) for supply voltages less than 20v, the absolute maximum input voltage is equal to the supply voltage. (6) human body model, 1.5 k in series with 100 pf. 4 submit documentation feedback copyright ? 2005 ? 2013, texas instruments incorporated product folder links: LM108AJAN
obsolete LM108AJAN www.ti.com snosaj6c ? february 2005 ? revised april 2013 table 1. quality conformance inspection mil-std-883, method 5005 - group a subgroup description temp ( c) 1 static tests at +25 c 2 static tests at +125 c 3 static tests at ? 55 c 4 dynamic tests at +25 c 5 dynamic tests at +125 c 6 dynamic tests at ? 55 c 7 functional tests at +25 c 8a functional tests at +125 c 8b functional tests at ? 55 c 9 switching tests at +25 c 10 switching tests at +125 c 11 switching tests at ? 55 c lm108a electrical characteristics dc parameters the following conditions apply to all the following parameters, unless otherwise specified. dc: +v cc = +20v, ? v cc = ? 20v, v cm = 0v, r s = 50 ? sub- symbol parameter conditions notes min max units groups v io -0.5 0.5 mv 1 +v cc = 35v, -v cc = -5v, v cm = -15v -1 1 mv 2, 3 -0.5 0.5 mv 1 +v cc = 5v, -v cc = -35v, v cm = 15v -1 1 mv 2, 3 input offset voltage -0.5 0.5 mv 1 -1 1 mv 2, 3 -0.5 0.5 mv 1 +v cc = +5v, -v cc = -5v -1 1 mv 2, 3 delta v io / 25 c t a +125 c see (1) -5 5 v/ c 2 temperature coeffient of input delta t offset voltage 25 c t a -55 c see (1) -5 5 v/ c 3 i io -0.2 0.2 na 1 +v cc = 35v, -v cc = -5v, v cm = -15v -0.4 0.4 na 2, 3 -0.2 0.2 na 1 +v cc = 5v, -v cc = -35v, v cm = 15v -0.4 0.4 na 2, 3 input offset current -0.2 0.2 na 1 -0.4 0.4 na 2, 3 -0.2 0.2 na 1 +v cc = +5v, -v cc = -5v -0.4 0.4 na 2, 3 delta i io / 25 c t a +125 c see (1) -2.5 2.5 pa/ c 2 temperature coeffient of input delta t offset current 25 c t a -55 c see (1) -2.5 2.5 pa/ c 3 (1) calculated parameter copyright ? 2005 ? 2013, texas instruments incorporated submit documentation feedback 5 product folder links: LM108AJAN
obsolete LM108AJAN snosaj6c ? february 2005 ? revised april 2013 www.ti.com lm108a electrical characteristics dc parameters (continued) the following conditions apply to all the following parameters, unless otherwise specified. dc: +v cc = +20v, ? v cc = ? 20v, v cm = 0v, r s = 50 ? sub- symbol parameter conditions notes min max units groups i ib -0.1 2 na 1 +v cc = 35v, -v cc = -5v, -1 2 na 2 v cm = -15v -0.1 3 na 3 -0.1 2 na 1 +v cc = 5v, -v cc = -35v, -1 2 na 2 v cm = 15v -0.1 3 na 3 input bias current -0.1 2 na 1 -1 2 na 2 -0.1 3 na 3 -0.1 2 na 1 +v cc = +5v, -v cc = -5v -1 2 na 2 -0.1 3 na 3 +psrr power supply rejection ratio +v cc = 10v, -v cc = -20v -16 16 v/v 1, 2, 3 -psrr power supply rejection ratio +v cc = 20v, -v cc = -10v -16 16 v/v 1, 2, 3 cmrr common mode rejection ratio v cm = 15v 96 db 1, 2, 3 +i os +v cc = +15v, -v cc = -15v, short circuit current -20 ma 1, 2, 3 t 25ms ? i os +v cc = +15v, -v cc = -15v, short circuit current 20 ma 1, 2, 3 t 25ms i cc 0.6 ma 1, 2 power supply current +v cc = +15v, -v cc = -15v 0.8 ma 3 +v op output voltage swing r l = 10k ? 16 v 4, 5, 6 ? v op output voltage swing r l = 10k ? -16 v 4, 5, 6 +a vs see (2) 80 v/mv 4 open loop voltage gain r l = 10k ? , v o = +15v see (2) 40 v/mv 5, 6 ? a vs see (2) 80 v/mv 4 open loop voltage gain r l = 10k ? , v o = -15v see (2) 40 v/mv 5, 6 a vs open loop voltage gain +v cc = 5v, r l = 10k ? , v o = 2v see (2) 20 v/mv 4, 5, 6 (2) datalog reading in k = v/mv 6 submit documentation feedback copyright ? 2005 ? 2013, texas instruments incorporated product folder links: LM108AJAN
obsolete LM108AJAN www.ti.com snosaj6c ? february 2005 ? revised april 2013 lm108a electrical characteristics ac parameters the following conditions apply to all the following parameters, unless otherwise specified. ac +v cc = +20v, ? v cc = ? 20v, v cm = 0v, r s = 50 ? sub- symbol parameter conditions notes min max units groups tr tr r l = 10k ? , c l = 100pf, transient response rise time 1000 ns 7, 8a, 8b f < 1khz, v i = +50mv tr os r l = 10k ? , c l = 100pf, transient response overshoot 50 % 7, 8a, 8b f < 1khz, v i = +50mv +sr slew rate a v = 1, v i = -5v to +5v 0.05 v/ s 7, 8a, 8b ? sr slew rate a v = 1, v i = +5v to -5v 0.05 v/ s 7, 8a, 8b ni bb noise broadband bw = 10hz to 5khz, r s = 0 ? 15 vrms 7 ni pc noise popcorn bw = 10hz to 5khz, r s = 100k ? 40 vpk 7 lm108a electrical characteristics dc parameters drift values the following conditions apply to all the following parameters, unless otherwise specified. dc +v cc = +20v, ? v cc = ? 20v, v cm = 0v, r s = 50 ? delta calculations performed on jan s devices at group b, subgroup 5 only. sub- symbol parameter conditions notes min max units groups v io input offset voltage -0.25 0.25 mv 1 i ib input bias current -0.5 0.5 na 1 copyright ? 2005 ? 2013, texas instruments incorporated submit documentation feedback 7 product folder links: LM108AJAN
obsolete LM108AJAN snosaj6c ? february 2005 ? revised april 2013 www.ti.com typical performance characteristics input currents offset error figure 5. figure 6. drift error input noise voltage figure 7. figure 8. closed loop power supply rejection output impedance figure 9. figure 10. 8 submit documentation feedback copyright ? 2005 ? 2013, texas instruments incorporated product folder links: LM108AJAN
obsolete LM108AJAN www.ti.com snosaj6c ? february 2005 ? revised april 2013 typical performance characteristics (continued) voltage gain output swing figure 11. figure 12. open loop supply current frequency response figure 13. figure 14. large signal voltage follower frequency response pulse response figure 15. figure 16. copyright ? 2005 ? 2013, texas instruments incorporated submit documentation feedback 9 product folder links: LM108AJAN
obsolete LM108AJAN snosaj6c ? february 2005 ? revised april 2013 www.ti.com typical applications ? teflon polyethylene or polycarbonate dielectric capacitor worst case drift less than 2.5 mv/sec figure 17. sample and hold figure 18. high speed amplifier with low drift and low input current 10 submit documentation feedback copyright ? 2005 ? 2013, texas instruments incorporated product folder links: LM108AJAN
obsolete LM108AJAN www.ti.com snosaj6c ? february 2005 ? revised april 2013 *in addition to increasing speed, the lm101a raises high and low frequency gain, increases output drive capability and eliminates thermal feedback. power bandwidth: 250 khzsmall signal bandwidth: 3.5 mhzslew rate: 10v/ s figure 19. fast summing amplifier copyright ? 2005 ? 2013, texas instruments incorporated submit documentation feedback 11 product folder links: LM108AJAN
obsolete LM108AJAN snosaj6c ? february 2005 ? revised april 2013 www.ti.com revision history date released revision section changes 1 mds data sheets converted into one corp. 02/25/05 a new release, corporate format datasheet format. mjlm108a-x rev 2a0. mds will be archived. all temps. +ios from -15 ma min to -20 ma min and - 01/05/06 b dc electrical ' s ios from +15 ma max to +20 ma max revision c, end of life on product/nsid dec. 09/24/10 c obsolete data sheet 2008/09 obsolete data sheet changes from revision b (april 2013) to revision c page ? changed layout of national data sheet to ti format .......................................................................................................... 11 12 submit documentation feedback copyright ? 2005 ? 2013, texas instruments incorporated product folder links: LM108AJAN
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