lm129/lm329 1 129329fd for more information www.linear.com/lm329 typical application description 6.9v precision voltage reference the lm ? 329 temperature compensated 6.9v zener references provide excellent stability over time and temperature, very low dynamic impedance and a wide operating current range. the device achieves low dynamic impedance by incorporating a high gain shunt regulator around the zener. the excellent noise performance of the device is achieved by using a buried zener design which eliminates surface noise phenomenon associated with ordinary zeners. to serve a wide variety of applications, the lm129 is available in several temperature coeficient grades and two package styles. a 20ma positive current source application is shown below. 20ma positive current source features applications n guaranteed 10ppm/c temperature coeficient n guaranteed 1 maximum dynamic impedance n guaranteed 20v maximum wideband noise n wide operating current range: 0.6ma to 15ma n transducers n a/d and d/a converters n calibration standards n instrumentation reference reverse voltage change C + 20v lm329 6.95v 20k0.1% 1740.1% 4.3k 20k0.1% lt1001 10k out20ma 129329 ta01 23 7 6 4 reverse current (ma) 0 reverse voltage change (mv) 6 10 129329 ta01b 2 4 8 8 76 5 4 3 2 1 0 t a = 25c l , lt, ltc, ltm, linear technology and the linear logo are registered trademarks of linear technology corporation. all other trademarks are the property of their respective owners. downloaded from: http:///
lm129/lm329 2 129329fd for more information www.linear.com/lm329 absolute maximum ratings operating temperature range lm129 (obsolete) .......................... C55c to 125c lm329 ..................................................... 0c to 70c storage temperature range ................... C65c to 150c (note 1) order information lead free finish tape and reel part marking package description temperature range lm129ah#pbf lm129ah#trpbf lm129ah 2-lead plastic to-46 metal can C55c to 125c lm129bh#pbf lm129bh#trpbf lm129bh 2-lead plastic to-46 metal can C55c to 125c lm129ch#pbf lm129ch#trpbf lm129ch 2-lead plastic to-46 metal can C55c to 125c lm329ah#pbf lm329ah#trpbf lm329ah 2-lead plastic to-46 metal can 0c to 70c lm329bh#pbf lm329bh#trpbf lm329bh 2-lead plastic to-46 metal can 0c to 70c lm329ch#pbf lm329ch#trpbf lm329ch 2-lead plastic to-46 metal can 0c to 70c lm329dh#pbf lm329dh#trpbf lm329dh 2-lead plastic to-46 metal can 0c to 70c lm329az#pbf lm329az#trpbf lm329bz 3-lead plastic to-92 0c to 70c lm329bz#pbf lm329bz#trpbf lm329bz 3-lead plastic to-92 0c to 70c lm329cz#pbf lm329cz#trpbf lm329bz 3-lead plastic to-92 0c to 70c lm329dz#pbf lm329dz#trpbf lm329bz 3-lead plastic to-92 0c to 70c consult ltc marketing for parts speciied with wider operating temperature ranges. consult ltc marketing for information on non-standard lead based inish parts. for more information on lead free part marking, go to: http://www .linear.com/leadfree/ for more information on tape and reel speciications, go to: http://www.linear.com/tapeandreel/ bottom view h package 2-lead to-46 metal can t jmax = 150c, q ja = 440c/w, q jc = 80c/w obsolete package consider the z package for alternate source bottom view z package 3-lead plastic to-92 t jmax = 150c, q ja = 160c/w pin configuration lead temperature (soldering, 10 sec) .................. 300c reverse-breakdown current .................................. 30ma forward current ....................................................... 2ma downloaded from: http:///
lm129/lm329 3 129329fd for more information www.linear.com/lm329 electrical characteristics 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. the l denotes the speci?cations which apply over the full operating temperature range, otherwise speci?cations are at t a = 25c. (note 2) symbol parameter conditions lm129a/ lm129b/lm129c lm329a/lm329b/ lm329c/lm329d units min ty p max min typ max v z reverse-breakdown voltage t a = 25c, 0.6ma i r 15ma 6.7 6.9 7.2 6.6 6.9 7.25 v ?v z ?i r reverse-breakdown voltage change with current t a = 25c, 0.6ma i r 15ma 1ma i r 15ma l 9 12 14 9 12 20 mv mv ?v z ?temp temperature coeficient i r = 1ma, lm129a/lm329a lm129b/lm329b lm129c/lm329c lm329d l l l l 6 15 30 10 20 50 6 15 30 50 10 20 50 100 ppm/c ppm/c ppm/c ppm/c change in temperature coeficient 1ma i r 15ma l 1 1 ppm/c r z dynamic impedance t a = 25c, i r = 1ma 1ma i r 15ma l 0.6 0.8 1 0.8 1 2 e n rms noise t a = 25c, 10hz f 10khz 7 20 7 100 v ?v z ?time long-term stability t a = 45c 0.1c, i r = 1ma 0.3% 20 20 ppm/khr note 2: to determine the junction temperature as a function of the ambient temperature, see q ja for each package. downloaded from: http:///
lm129/lm329 4 129329fd for more information www.linear.com/lm329 typical performance characteristics forward current (ma) 0.001 forward voltage (v) 1.21.0 0.8 0.6 0.4 0.2 0 0.01 0.1 1.0 10 129329 g04 t a = 25c frequency (hz) 10 noise (nv /hz) 100 100k 129329 g05 50 100 1k 10k 150 time (seconds) 0 noise (10v/div) 200 129329 g06 50 100 150 250 0.01hz to 1hz forward characteristics noise voltage low frequency noise voltage reverse voltage (v) 6.45 reverse current (ma) 100 10 1.00.1 0.01 6.55 6.65 6.75 6.85 129329 g01 . 6.95 7.05 t j = 55c t j = 125c t j = 25c frequency (hz) 10 100 1k 10k 100k dynamic impedance () 100 10 1.00.1 129329 g02 t a = 25c time (s) voltage (v) 86 4 2 0 14 0 0 100 200 300 129329 g03 400 output input 6.8k v in v out reverse characteristics dynamic impedance response time downloaded from: http:///
lm129/lm329 5 129329fd for more information www.linear.com/lm329 schematic diagram 50 q2 q3 q4 q7 q6 q5 q1 30k 2k 1k 2.6k 2k 10k 15pf 30pf d1 6.2v 12 + C 129329 sd downloaded from: http:///
lm129/lm329 6 129329fd for more information www.linear.com/lm329 package description 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 h package 2-lead and 3-lead to-46 metal can (reference ltc dwg # 05-08-1340) 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 obsolete package z package 3-lead to-92 (similar to to-226) (reference ltc dwg # 05-08-1410) downloaded from: http:///
lm129/lm329 7 129329fd for more information www.linear.com/lm329 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. revision history rev date description page number d 12/14 web links added package/order information updated revision history added all 2 7 (revision history begins at rev d) downloaded from: http:///
lm129/lm329 8 129329fd for more information www.linear.com/lm329 linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax : (408) 434-0507 www.linear.com ? linear technology corporation 2008 lt 1214 rev d ? printed in usa (408) 432-1900 fax : (408) 434-0507 www.linear.com/lm329 related parts typical application part number description comments lt1460 micropower, precise series reference 10ppm/c, output voltages: 2.5v, 3v, 3.3v, 5v, 10v lt1634 0.05% accurate, 10ppm/c, shunt reference output voltages: 1.25v, 2.5v, 4.096v, 5v lm329 6.9v i min 0.6ma r s 9v to 40v 129329 ta02 ? + 15v 10v 9k 7.5k lm329 6.9v lt1001 23 4 7 6 20k 1% 129329 ta03 common reference buffered reference using a single supply downloaded from: http:///
|
