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may 2007 rev 3 1/15 15 lm236-lm336 2.5v voltage references features low temperature coefficient wide operating current of 400a to 10ma 0.2 dynamic impedance guaranteed temp erature stability fast turn-on description the lm236 and lm336 are precision 2.5v regulator diodes. these voltage reference monolithic ics operate like 2.5v zener diodes with a low temperature coefficient and a dynamic impedance of 0.2 . a third pin enables adjusting the reference voltage and the temperature coefficient. to92 (plastic package) so8 (plastic micropackage) adj v+ v- to92 (bottom view) 8765 1234 v+ nc adj nc nc v+ nc nc so8 (top view) pin connections 1- nc 2- nc 3- nc 4- v- 5- adj 6- nc 7- nc 8- v+ www.st.com
schematic diagram lm236-lm336 2/15 1 schematic diagram figure 1. schematic diagram 2 absolute maximum ratings table 1. absolute maximum ratings (amr) symbol parameter lm236 lm336,b unit i r i f current reverse forward 15 10 ma t oper operating free-air te mperature range -25 to +85 0 to +70 c t stg storage temperature range -65 to +150 c
lm236-lm336 electrical characteristics 3/15 3 electrical characteristics table 2. electrical characteristics symbol parameter lm236 lm336,b unit min. typ. max. min. typ. max. v r reference breakdown voltage t amb = +25c, i r = 1ma lm236, lm336 lm336b 2.44 2.49 2.54 2.39 2.44 2.49 2.49 2.59 2.54 v v r reverse breakdown voltage change with current 400a i r 10ma t amb = +25c t min t amb t max 2.6 3 6 10 2.6 3 10 12 mv z d reverse dynamic impedance (i r = 1ma) t amb = +25c t min t amb t max 0.2 0.4 0.6 1 0.2 0.4 1 1.4 k vt temperature stability (v r = 2.49v, i r = 1ma) 3.5 9 1.8 6 mv k vh long term stability (t amb = +25c 0.1c, i r = 1ma) 20 20 ppm figure 2. reverse voltage change figure 3. zener noise voltage reverse voltage change (mv) reverse current (ma) noise (nv/ hz) frequency (hz)
electrical characteristics lm236-lm336 4/15 figure 4. dynamic impedance figure 5. response time frequency (hz) dynamic impedance (ohm) voltage swing (v) time (s) figure 6. reverse characteristics figure 7. forward characteristics figure 8. temperature drift reverse current (ma) reverse voltage (v) forward voltage (v) forward current (ma) reverse voltage (v) temperature (c)
lm236-lm336 application information 5/15 4 application information the lm236, lm336 voltage references are easier to use than zener diodes. their low impedance and wide current range facilitate biasing in any circuits. besides, the breakdown voltage or the temperature coefficient can be adjusted so as to optimize the performance of the circuit. figure 9 represents a lm336 with a 10k potentiometer to adjust the reverse breakdown voltage which can be adjusted without altering the temperature coefficient of the circuit. the adjustment range is generally su fficient to adjust the initial to lerance of the circuit and the inaccuracy of the amplifier circuit. to obtain a lower temperature coefficient two diodes can be connected in series as indicated in figure 10 . when the circuit is adjusted to 2.49v the temperature coefficient is minimized. for a correct temperature coefficient, the diodes should be at the same ambient temperature as the lm336. the value of r1 is not critical (2-20k ). figure 9. lm336 with pot for adjustment of breakdown voltage figure 10. temperature coefficient adjustment
application information lm236-lm336 6/15 typical applications figure 13. precision power regulator with low temperature coefficient figure 11. 2.5v reference figure 12. wide input range reference
lm236-lm336 application information 7/15 figure 14. adjustable shunt regulator figure 15. linear ohmmeter
application information lm236-lm336 8/15 figure 16. bipolar output reference figure 17. 5v buffered reference
lm236-lm336 application information 9/15 figure 18. low noise buffered reference
package information lm236-lm336 10/15 5 package information in order to meet environmental requirements, stmicroelectronics offers these devices in ecopack ? packages. these packages have a lead-free second level interconnect. the category of second level interconnect is marked on the package and on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an stmicroelectronics trademark. ecopack specifications are available at: www.st.com .
lm236-lm336 package information 11/15 5.1 so-8 package mechanical data ref. dimensions millimeters inches min. typ. max. min. typ. max. a1.750.069 a1 0.10 0.25 0.004 0.010 a2 1.25 0.049 b 0.28 0.48 0.011 0.019 c 0.17 0.23 0.007 0.010 d 4.80 4.90 5.00 0.189 0.193 0.197 h 5.80 6.00 6.20 0.228 0.236 0.244 e1 3.80 3.90 4.00 0.150 0.154 0.157 e 1.27 0.050 h 0.25 0.50 0.010 0.020 l 0.40 1.27 0.016 0.050 k1818 ccc 0.10 0.004
package information lm236-lm336 12/15 5.2 to-92 ammopack and tape & reel package mechanical data dim. millimeters inches min. typ. max. min. typ. max. al 5.0 0.197 a 5.0 0.197 t 4.0 0.157 d 0.45 0.018 i1 2.5 0.098 p 11.7 12.7 13.7 0.461 0.500 0.539 po 12.4 12.7 13 0.488 0.500 0.512 p2 5.95 6.35 6.75 0.234 0.250 0.266 f1/f2 2.4 2.5 2.8 0.094 0.098 0.110 h -1 0 1 -0.039 0 0.039 p -1 0 1 -0.039 0 0.039 w 17.5 18.0 19.0 0.689 0.709 0.748 w0 5.7 6 6.3 0.224 0.236 0.248 w1 8.5 9 9.75 0.335 0.354 0.384 w2 0.5 0.020 h200.787 h0 15.5 16 16.5 0.610 0.630 0.650 h1 25 0.984 do 3.8 4.0 4.2 0.150 0.157 0.165 l1 11 0.433 a1 p p a t h h1 h l1 d i1 h0 w2 w0 w1 w d0 f1 f2 p2 p0
lm236-lm336 package information 13/15 5.3 to-92 bulk package mechanical data dim. millimeters inches min. typ. max. min. typ. max. l 1.27 0.05 b 3.2 3.7 4.2 0.126 0.1457 0.1654 o1 4.45 5.00 5.2 0.1752 0.1969 0.2047 c 4.58 5.03 5.33 0.1803 0.198 0.2098 k12.7 0.5 o2 0.407 0.5 0.508 0.016 0.0197 0.02 a 0.35 0.0138
ordering information lm236-lm336 14/15 6 ordering information 7 revision history table 3. order codes part number temperature range package packing marking lm236d/dt -25c to +85c so-8 tube or tape & reel lm236 lm236z/zt/ap -25c to +85c to-92 bulk or tape & reel or ammopack lm236 lm336d/dt -25c to +85c so-8 tube or tape & reel lm336 lm336z/zt/ap -25c to +85c to-92 bulk or tape & reel or ammopack lm336 lm336bd/bdt 0c to 70c so-8 tube or tape & reel lm336b lm336bz/bzt/bap 0c to 70c to-92 bulk or tape & reel or ammopack lm336b date revision changes 2-may-1997 1 initial release. 24-may-2003 2 caption of pinout diagram for to-92 package changed to indicate top view. 29-may-2007 3 corrected caption of pinout diagram for to-92 package on cover page (previous version is wrong, should be bottom view). updated section 5: package information and table 3: order codes .
lm236-lm336 15/15 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2007 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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