1 lm136-2.5/lm336-2.5 applicatio s u features descriptio u typical applicatio u reference for 5v systems 8-bit a/d and d/a reference digital voltmeters current loop measurement and control systems power supply monitor guaranteed temperature stability maximum 0.6 w dynamic impedance adjustable for minimum temperature coefficient wide operating current range 2.5v reference the lm136-2.5 is a general purpose shunt regulator diodedesigned to operate over a wide current range while maintaining good stability with time and temperature. the third terminal allows either the temperature coefficient to be minimized or the reference voltage to be adjusted without changing the temperature coefficient. because it operates as a shunt regulator it can be used equally well as a positive or negative reference. the lm136-2.5 is available with initial tolerances as low as 1% in either a to-46 metal can for hermetic requirements or a low cost to-92 plastic package. linear? advanced design, test and process techniques have optimized the lm136-2.5 to achieve superior perfor- mance and reliability over previous designs. for more demanding precision reference applications requiring very low initial tolerance and temperature coefficients, consult the lt1009 data sheet. a typical 2.5v reference with trim is shown below. , ltc and lt are registered trademarks of linear technology corporation. 136/336 ta01a 5v to 35v 3.6k 10k*trim lm336-2.5 output * does not affect temperature coefficient reverse current (ma) 0 3.53.0 2.5 2.0 1.5 1.0 0.5 0 6 136/336 ta01b 24 81 0 reverse voltage change (mv) t a = 25 c 2.5v reference reverse voltage change downloaded from: http:///
lm136-2.5/lm336-2.5 2 lm136/lm136a lm336/lm336b symbol parameter conditions min typ max min typ max units v z reverse breakdown voltage t a = 25 c, i r = 1ma lm136/lm336 2.440 2.490 2.540 2.390 2.490 2.590 v lm136a/lm336b 2.465 2.490 2.515 2.440 2.490 2.540 v d v z reverse breakdown change 400 m a i r 10ma d i r with current t a = 25 c 2.6 6 2.6 10 mv t min t a t max 3.0 10 3.0 12 mv r z reverse dynamic impedance i r = 1ma t a =25 c 0.2 0.6 0.2 1.0 w t min t a t max 0.4 1.0 0.4 1.4 w d v z temperature stability v r adjusted to 2.490v, i r = 1ma, d temp t min t a t max (see figure 1) 12 18 1.8 6 mv d v z long term stability t a = 25 c 0.1 c, i r = 1ma 20 20 ppm/khr d time operating temperature range lm136-2.5 (obsolete) .............. ?5 c to 125 c lm336-2.5 .............................................. 0 c to 70 c storage temperature range ................. 65 c to 150 c order part number t jmax = 150 c, q ja = 160 c/w lm136h-2.5lm136ah-2.5 lm336h-2.5 lm336ah-2.5 absolute axi u rati gs w ww u package/order i for atio uu w (note 1) electrical characteristics the denotes the specifications which apply over the full operating temperature range, otherwise specifications are at t a = 25 c. (note 2) consult ltc marketing for parts specified with wider operating temperature ranges. order part number lm336z-2.5lm336bz-2.5 bottom view z package 3-lead plastic to-92 adj + bottom view h package 3-lead to-46 metal can + adj lead temperature (soldering, 10 sec).................. 300 c reverse current .................................................... 15ma forward current ................................................... 10ma obsolete package consider the z packages for alternate source (note 2) t jmax = 150 c, q ja = 440 c/w (note 2) note 1: absolute maximum ratings are those values beyond which the life of a device may be impaired.note 2: the lt1009 is an improved, low cost, pin for pin replacement for the ??and ??versions. for further information consult the lt1009 datasheet. 136/336 f01 v + r 5k 1ma 2.490v * adjust to 2.490 ? any silicon signal diode d1 ? d2 ? * d1, d2 1n4148 figure 1. adjusting the lm336 forminimum temperature coefficient downloaded from: http:///
3 lm136-2.5/lm336-2.5 typical perfor a ce characteristics uw reverse characteristics forward characteristics temperature drift dynamic impedance zener noise voltage response time w sche atic diagra w 136/336 sd 30pf 20pf q2 q1 q3 q5 q4 q6 q12 q14 q13 10k 30k 2k 1.1k 6.6k 500 6.6k 24k 24k 50k q18 q15 q11 q10 q8 q7 q16 q17 q9 adj + reverse voltage (v) 0.6 reverse current (a) 2.2 136/336 ?g01 1.0 1.4 1.8 2.6 10 ? 10 ? 10 ? 10 ? 10 ? t j = 125 c t j = 55 c t j = 25 c forward current (ma) 0.001 forward voltage (v) 1.21.0 0.8 0.6 0.4 0.2 0 0.01 0.1 1 10 136/336 g02 t j = 25 c temperature ( c) ?5 reverse voltage (v) 2.592.57 2.55 2.53 2.51 2.49 2.47 2.45 2.43 2.41 2.39 2.37 85 105 136/336 g03 ?5 25 5 ?5 45 65 125 i r = 1ma frequency (hz) 10 100 1k 10k 100k dynamic impedance ( ) 100 10 1 0.1 136/336 g04 i r = 1ma ?5 c t j 125 c frequency (hz) 10 noise (nv/ ? hz) 10k 100k 136/336 g05 100 1k 250200 150 100 50 i r = 1ma t j = 25 c time ( s) 0 voltage swing (v) 3.53.0 2.5 2.0 1.5 1.0 0.5 0 12 84 0 12 0 136/336 g06 output input 5.1k output input information furnished by linear technology corporation is believed to be accurate and reliable. however, no responsibility is assumed for its use. linear technology corporation makes no represen-tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. downloaded from: http:///
lm136-2.5/lm336-2.5 4 linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax: (408) 434-0507 www.linear.com ? linear technology corporation 1986 136336fa lt/cp 0801 1.5k rev a ? printed in usa related parts package descriptio u part number description comments lt1009 precision 2.5v shunt reference 0.2% max initial tolerance 0.016 ?0.021** (0.406 ?0.533) dia 0.025 (0.635) max 0.085 ?0.105 (2.159 ?2.667) 0.500 (12.700) min 0.178 ?0.195 (4.521 ?4.953) 0.209 ?0.219 (5.309 ?5.537) 0.100 (2.540) typ 45 h02/03(to-46) 1098 0.050 (1.270) typ 0.050 (1.270) typ 0.028 ?0.048 (0.711 ?1.219) 0.036 ?0.046 (0.914 ?1.168) for 3-lead package only reference plane * lead diameter is uncontrolled between the reference plane and 0.045" below the reference plane for solder dip lead finish, lead diameter is 0.016 ?0.024 (0.406 ?0.610) * ** pin 1 h package 2-lead and 3-lead to-46 metal can (reference ltc dwg # 05-08-1340) z package 3-lead plastic to-92 (similar to to-226) (reference ltc dwg # 05-08-1410) typical applicatio s u obsolete package 500 5v 5v ?v ?v 5k 5k 5k 10k1% 9.76k 1% *lm336-2.5 2n39042n3906 * out 136/336 ta04 + 1n41481n4148 10k + + *lm336z-2.5 * op-07ch 23 4 6 7 1 f 20 f 20 f 10k 10k 100k 1k 1k 2.5v v in 3 6v 136/336 ta05 switchable 1.25v bipolar reference low noise 2.5v buffered reference 0.050 (1.27) bsc 0.060 0.005 (1.524 0.127) dia 0.90 (2.286) nom 0.180 0.005 (4.572 0.127) 0.180 0.005 (4.572 0.127) 0.500 (12.70) min 0.050 (1.270) max uncontrolledlead dimension 0.016 0.003 (0.406 0.076) 5 nom 0.015 0.002 (0.381 0.051) 0.060 0.010 (1.524 0.254) 10 nom 0.140 0.010 (3.556 0.127) z3 (to-92) 0401 0.098 +016/ 0.04 (2.5 +0.4/ 0.1) 2 plcs to-92 tape and reel refer to tape and reel section of ltc data book for additional information 3.6v to 40v r62 lm336-2.5 lm334 v + v 136/336 ta02 wide supplyrange, reference low temperaturecoefficient power regulator lt317a 1.2k lm336 adj in out v out 1n41481n4148 r2*10k r1375 v in 2k adjust r2for 3.75v across r1 * 136/336 ta03 downloaded from: http:///
|
