micropower voltage reference diodes the lm285/lm385 series are micropower twoterminal bandgap voltage regulator diodes. designed to operate over a wide current range of 10 m a to 20 ma, these devices feature exceptionally low dynamic impedance, low noise and stable operation over time and temperature. tight voltage tolerances are achieved by onchip trimming. the large dynamic operating range enables these devices to be used in applications with widely varying supplies with excellent regulation. extremely low operating current make these devices ideal for micropower circuitry like portable instrumentation, regulators and other analog circuitry where extended battery life is required. the lm285/lm385 series are packaged in a low cost to226aa plastic case and are available in two voltage versions of 1.235 and 2.500 v as denoted by the device suffix (see ordering information table). the lm285 is specified over a 40 c to +85 c temperature range while the lm385 is rated from 0 c to +70 c. the lm385 is also available in a surface mount plastic package in voltages of 1.235 and 2.500 v. ? operating current from 10 m a to 20 ma ? 1.0%, 1.5%, 2.0% and 3.0% initial tolerance grades ? low temperature coefficient ? 1.0 w dynamic impedance ? surface mount package available representative schematic diagram open for 1.235 v 10 k cathode anode 100 k 500 w 600 k 600 k 425 k 74.3 k 8.45 k 600 k 360 k open for 2.5 v on semiconductor ? semiconductor components industries, llc, 2001 march, 2001 rev. 3 1 publication order number: lm285/d lm285 lm385, b semiconductor technical data micropower voltage reference diodes ordering information d suffix plastic package case 751 (so8) (bottom view) 1 32 8 7 6 5 cathode n.c. n.c. n.c. 4 3 2 anode n.c. n.c. 1 n.c. n.c. cathode anode - + lm385-1.2 1.235 v 3.3 k 1.5 v battery standard application device operating temperature range tolerance lm285d1.2 lm285z1.2 t a = 40 to +85 c 1.0% lm285d2.5 lm285z2.5 lm385bd1.2 lm385bz1.2 lm385d1.2 lm385z1.2 lm385bd2.5 lm385bz2.5 lm385d2.5 lm385z2.5 reverse break down voltage 1.235 v 1.5% 2.500 v t a = 0 to +70 c 1.0% 1.235 v 2.0% 1.235 v 1.5% 2.500 v 3.0% 2.500 v z suffix plastic package case 29
lm285 lm385, b http://onsemi.com 2 maximum ratings (t a = 25 c, unless otherwise noted) rating symbol value unit reverse current i r 30 ma forward current i f 10 ma operating ambient temperature range t a c lm285 lm385 40 to + 85 0 to +70 operating junction temperature t j + 150 c storage temperature range t stg 65 to + 150 c electrical characteristics (t a = 25 c, unless otherwise noted) lm2851.2 lm3851.2 / lm385b1.2 characteristic symbol min typ max min typ max unit reverse breakdown voltage (i rmin i r 20 ma) v (br)r v lm2851.2/lm385b1.2 1.223 1.235 1.247 1.223 1.235 1.247 t a = t low to t high (note 1) 1.200 1.270 1.210 1.260 lm3851.2 1.205 1.235 1.260 t a = t low to t high (note 1) 1.192 1.273 minimum operating current i rmin m a t a = 25 c 8.0 10 8.0 15 t a = t low to t high (note 1) 20 20 reverse breakdown voltage change with current d v (br)r mv i rmin i r 1.0 ma, t a = +25 c 1.0 1.0 t a = t low to t high (note 1) 1.5 1.5 1.0 ma i r 20 ma, t a = +25 c 10 20 t a = t low to t high (note 1) 20 25 reverse dynamic impedance z 0.6 0.6 w i r = 100 m a, t a = +25 c average temperature coefficient d v (br) / d t 80 80 ppm/ c 10 m a i r 20 ma, t a = t low to t high (note 1) wideband noise (rms) n 60 60 m v i r = 100 m a, 10 hz f 10 khz long term stability s 20 20 ppm/ i r = 100 m a, t a = +25 c 0.1 c khr
lm285 lm385, b http://onsemi.com 3 electrical characteristics (t a = 25 c, unless otherwise noted) lm2852.5 lm3852.5 / lm385b2.5 characteristic symbol min typ max min typ max unit reverse breakdown voltage (i rmin i r 20 ma) v (br)r v lm2852.5/lm385b2.5 2.462 2.5 2.538 2.462 2.5 2.538 t a = t low to t high (note 1) 2.415 2.585 2.436 2.564 lm3852.5 2.425 2.5 2.575 t a = t low to t high (note 1) 2.400 2.600 minimum operating current i rmin m a t a = 25 c 13 20 13 20 t a = t low to t high (note 1) 30 30 reverse breakdown voltage change with current d v (br)r mv i rmin i r 1.0 ma, t a = +25 c 1.0 2.0 t a = t low to t high (note 1) 1.5 2.5 1.0 ma i r 20 ma, t a = +25 c 10 20 t a = t low to t high (note 1) 20 25 reverse dynamic impedance z 0.6 0.6 w i r = 100 m a, t a = +25 c average temperature coefficient d v (br) / d t 80 80 ppm/ c 20 m a i r 20 ma, t a = t low to t high (note 1) wideband noise (rms) n 120 120 m v i r = 100 m a, 10 hz f 10 khz long term stability s 20 20 ppm/ i r = 100 m a, t a = +25 c 0.1 c khr notes: 1. t low = 40 c for lm2851.2, lm2852.5 t high = +85 c for lm2851.2, lm2852.5 = 0 c for lm3851.2, lm385b1.2, lm3852.5, lm385b2.5 t high =+70 c for lm3851.2, lm385b1.2, lm3852.5, lm385b2.5
lm285 lm385, b http://onsemi.com 4 1.1 t, time (ms) 0 1.0 0.9 0.8 0.7 0.6 0.3 0.2 0.1 1.25 1.50 0.75 0.50 0 5.0 0.25 10 0 1.00 output (v) input (v) input dut output 100 k ? ? ??k ?? ?k ? ?? ?? ? ?? M? ? ? ??????? ???? ? ? ???? ??? ??? ?? ? ? ??????? ???????? ? c) 1.210 1.220 1.230 1.240 1.250 100 75 50 025 -25 -50 v (br)r , reverse voltage (v) 10 0.01 100 1.0 0.1 1.2 1.0 0.8 0.6 0.4 0.2 0 i f , forward current (ma) v f , forward voltage (v) typical performance curves for lm2851.2 / 3851.2 / 385b1.2 0.2 0.4 0.6 0.8 1.0 1.2 10 1.4 100 1.0 0.1 0 v( br) , reverse voltage (v) figure 1. reverse characteristics , reverse current (a) m i r figure 2. reverse characteristics 0.1 1.0 10 100 0.01 8.0 6.0 4.0 2.0 0 -2.0 10 i r , reverse current (ma) v (br)r , reverse voltage change (mv) d t a = +85 c +25 c -40 c t a = +85 c +25 c -40 c figure 3. forward characteristics t a = -40 c +25 c +85 c figure 4. temperature drift i r = 100 m a figure 5. noise voltage figure 6. response time
lm285 lm385, b http://onsemi.com 5 v( br) , reverse voltage (v) 1.1 t, time (ms) 0 1.0 0.9 0.8 0.7 0.6 0.3 0.2 0.1 2.50 3.00 1.50 1.00 0 5.0 0.50 10 0 2.00 output (v) input (v) input dut output 100 k ? ??k ?? ?k ? ?? ? ?? ?? ??? ? ? ??????? ???? ? ? ???? ??? ??? ?? ? ? ??????? ???????? ? c) 2.450 2.470 2.490 2.510 2.520 100 75 50 025 -25 -50 v (br)r , reverse voltage (v) 10 0.01 100 1.0 0.1 1.2 1.0 0.8 0.6 0.4 0.2 0 i f , forward current (ma) v f , forward voltage (v) typical performance curves for lm2852.5 / 3852.5 / 385b2.5 0.5 1.0 1.5 2.0 2.5 3.0 10 3.5 100 1.0 0.1 0 figure 7. reverse characteristics , reverse current (a) m i r figure 8. reverse characteristics 0.1 1.0 10 100 0.01 8.0 6.0 4.0 2.0 0 -2.0 10 i r , reverse current (ma) v (br)r , reverse voltage change (mv) d t a = +85 c +25 c -40 c t a = +85 c +25 c -40 c figure 9. forward characteristics t a = -40 c +25 c +85 c figure 10. temperature drift i r = 100 m a figure 11. noise voltage figure 12. response time 2.460 2.480 2.500
lm285 lm385, b http://onsemi.com 6 package dimensions z suffix plastic package case 2911 issue al notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. contour of package beyond dimension r is uncontrolled. 4. lead dimension is uncontrolled in p and beyond dimension k minimum. r a p j l b k g h section xx c v d n n xx seating plane dim min max min max millimeters inches a 0.175 0.205 4.45 5.20 b 0.170 0.210 4.32 5.33 c 0.125 0.165 3.18 4.19 d 0.016 0.021 0.407 0.533 g 0.045 0.055 1.15 1.39 h 0.095 0.105 2.42 2.66 j 0.015 0.020 0.39 0.50 k 0.500 --- 12.70 --- l 0.250 --- 6.35 --- n 0.080 0.105 2.04 2.66 p --- 0.100 --- 2.54 r 0.115 --- 2.93 --- v 0.135 --- 3.43 --- 1 d suffix plastic package case 75107 (so8) issue w seating plane 1 4 5 8 n j x 45 k notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. a b s d h c 0.10 (0.004) dim a min max min max inches 4.80 5.00 0.189 0.197 millimeters b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.053 0.069 d 0.33 0.51 0.013 0.020 g 1.27 bsc 0.050 bsc h 0.10 0.25 0.004 0.010 j 0.19 0.25 0.007 0.010 k 0.40 1.27 0.016 0.050 m 0 8 0 8 n 0.25 0.50 0.010 0.020 s 5.80 6.20 0.228 0.244 x y g m y m 0.25 (0.010) z y m 0.25 (0.010) z s x s m
lm285 lm385, b http://onsemi.com 7 notes
lm285 lm385, b http://onsemi.com 8 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information central/south america: spanish phone : 3033087143 (monfri 8:00am to 5:00pm mst) email : onlitspanish@hibbertco.com tollfree from mexico: dial 018002882872 for access then dial 8662979322 asia/pacific : ldc for on semiconductor asia support phone : 13036752121 (tuefri 9:00am to 1:00pm, hong kong time) toll free from hong kong & singapore: 00180044223781 email : onlitasia@hibbertco.com japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. lm285/d north america literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com fax response line: 3036752167 or 8003443810 toll free usa/canada n. american technical support : 8002829855 toll free usa/canada europe: ldc for on semiconductor european support german phone : (+1) 3033087140 (monfri 2:30pm to 7:00pm cet) email : onlitgerman@hibbertco.com french phone : (+1) 3033087141 (monfri 2:00pm to 7:00pm cet) email : onlitfrench@hibbertco.com english phone : (+1) 3033087142 (monfri 12:00pm to 5:00pm gmt) email : onlit@hibbertco.com european tollfree access*: 0080044223781 *available from germany, france, italy, uk, ireland
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