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lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 1 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated description the lm4040 is a family of bandgap circuits designed to achieve precision micro-power voltage references of 2.5v, 3.0v and 5.0v. the devices are available in 0.2% b-grade, 0.5% c-grade and 1% d-grade initial tolerances. they are available in small outline sot23 and sc70-5 surface mount packages which are ideal for applications where space is at a premium. excellent performance is maintained over the 60a to 15ma operating current range with a typical temperature coefficient of only 20ppm/c. the device has been designed to be highly tolerant of capacitive loads so maintaining excellent stability. this device offers a pin for pin compatible alternative to the lm4040 voltage reference. features ? small packages: sot23 & sc70-5 ? no output capacitor required ? output voltage tolerance o lm4040b 0.2% at 25c o lm4040c 0.5% at 25c o lm4040d 1% at 25c ? low output noise ? (10hz to 10khz) .............. 45v rms ? wide operating current range 60a to 15ma ? extended temperature range -40c to +125c ? low temperature coefficient 100 ppm/c (max) ? all parts aec-q100 grade1 qualified applications ? battery powered equipment ? precision power supplies ? portable instrumentation ? portable communications devices ? notebook and palmtop computers ? data acquisition systems pin assignments * anode cathode to p v i e w * pin 1 must be left floating or connected to pin 2 3 1 2 lm4040 f (sot23) anode * cathode n/c n/c 1 2 3 4 5 lm4040 h5 (sc70-5) top view * pin 2 must be left floating or connected to pin 1
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 2 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated absolute maximum ratings (voltages to gnd unless otherwise stated) parameter rating unit continuous reverse current 20 ma continuous forward current 10 ma operating junction temperature -40 to +150 c storage temperature -55 to +150 c operation above the absolute maximum rating may cause dev ice failure. operation at the absolute maximum rating, for extended periods, may reduce device reliability. unless otherwise stated voltages specif ied are relative to the anode pin. package thermal data package ja p dis t amb = 25c, t j = 150c sot23 380c/w 330mw sc70-5 380c/w 330mw recommended operating conditions min. max. units reverse current 0.06 15 ma operating ambient temper ature range -40 125 c
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 3 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated electrical characteristics (test conditions: t amb = 25c, unless otherwise specified.) lm4040-2.5 symbol parameter conditions typ. lm4040 b limits lm4040 c limits lm4040 d limits units t amb v ref reverse breakdown voltage i r = 100a 25c 2.5 v reverse breakdown voltage tolerance i r = 100a 25c 5 12 25 mv -40 to +85c 21 29 49 -40 to +125c 30 38 63 i rmin minimum operating current 25c 45 60 60 65 a -40 to +85c 65 65 70 -40 to +125c 68 68 73 v r / t average reverse breakdown voltage temperature coefficient i r = 10ma -40 to +125c 20 i r = 1ma 15 100 100 150 ppm/c i r = 100a 15 v r / i r reverse breakdown change with current i rmin i r < 1ma 25c 0.3 0.8 0.8 1.0 mv -40 to +85c 1.0 1.0 1.2 -40 to +125c 1.0 1.0 1.2 1ma < i r < 15ma 25c 2.5 6.0 6.0 8.0 -40 to +85c 8.0 8.0 10.0 -40 to +125c 8.0 8.0 10.0 z r dynamic output impedance i r = 1ma, f = 120hz i ac = 0.1i r 0.3 0.8 0.9 1.1 ? e n noise voltage i r = 100a 10hz < f < 10khz 35 v rms v r long term stability (non cumulative) t = 1000hrs, i r = 100a 120 ppm v hyst themal hysteresis t = -40c to =125c 0.08 %
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 4 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated electrical characteristics (cont.) (test conditions: t amb = 25c, unless otherwise specified.) lm4040-3.0 symbol parameter conditions typ. lm4040 b limits lm4040 c limits lm4040 d limits units t amb v ref reverse breakdown voltage i r = 100a 25c 3.0 v reverse breakdown voltage tolerance i r = 100a 25c 6 15 30 mv -40 to +85c 26 34 59 -40 to +125c tbd 45 75 i rmin minimum operating current 25c 47 62 62 67 a -40 to +85c 67 67 72 -40 to +125c 70 70 75 v r / t average reverse breakdown voltage temperature coefficient i r = 10ma -40 to +125c 20 i r = 1ma 15 100 100 150 ppm/c i r = 100a 15 v r / i r reverse breakdown change with current i rmin i r < 1ma 25c 0.4 0.8 0.8 1.0 mv -40 to +85c 1.1 110 1.3 -40 to +125c 1.1 1.1 1.3 1ma < i r < 15ma 25c 2.7 6.0 6.0 8.0 -40 to +85c 9.0 9.0 11.0 -40 to +125c 9.0 9.0 11.0 z r dynamic output impedance i r = 1ma, f = 120hz i ac = 0.1i r 0.4 0.9 0.9 1.2 ? e n noise voltage i r = 100a 10hz < f < 10khz 35 v rms v r long term stability (non cumulative) t = 1000hrs, i r = 100a 120 ppm v hyst themal hysteresis t = -40c to = 125c 0.08 %
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 5 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated electrical characteristics (cont.) (test conditions: t amb = 25c, unless otherwise specified.) lm4040-5.0 symbol parameter conditions typ. lm4040 b limits lm4040 c limits lm4040 d limits units t amb v ref reverse breakdown voltage i r = 100a 25c 5.0 v reverse breakdown voltage tolerance i r = 100a 25c 10 25 50 mv -40 to +85c 43 58 99 -40 to +125c 60 75 125 i rmin minimum operating current 25c 54 74 74 79 a -40 to +85c 80 80 85 -40 to +125c 83 83 88 v r / t average reverse breakdown voltage temperature coefficient i r = 10ma -40 to +125c 30 i r = 1ma 20 100 100 150 ppm/c i r = 100a 20 v r / i r reverse breakdown change with current i rmin i r < 1ma 25c 0.5 1.0 1.0 1.3 mv -40 to +85c 1.4 1.4 1.8 -40 to +125c 1.4 1.4 1.8 1ma < i r < 15ma 25c 3.5 8.0 8.0 10.0 -40 to +85c 12.0 12.0 15.0 -40 to +125c 12.0 12.0 15.0 z r dynamic output impedance i r = 1ma, f = 120hz i ac = 0.1i r 0.5 1.1 1.1 1.5 ? e n noise voltage i r = 100a 10hz < f < 10khz 80 v rms v r long term stability (non cumulative) t = 1000hrs, i r = 100a 120 ppm v hyst themal hysteresis t = -40c to =125c 0.08 %
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 6 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated typical characteristics lm4040-2.5 v (%) ref 1.00 0.75 -0.75 -1.00 -0.25 -0.50 0.25 0.00 0.50 i = 100a r 40 80 120 -40 0 temperature (c) reference voltage temperature coefficient 40 80 120 -40 0 temperature (c) reference voltage temperature coefficient v ( % ) ref 1.00 0.75 -0.75 -1.00 -0.25 -0.50 0.25 0.00 0.50 i = 1ma r 10k 100k 1m 100 1k frequency (hz) reference impedance vs. frequency t = 25c i = 100a a r c = 0 l c = 1.0f tantalum l t = 25c i = 1ma a r 10k 100k 1m 100 1k z , reference impedance ( ) r 100 0.01 0.1 1 10 c = 0 l c = 1.0f tantalum l frequency (hz) reference impedance vs. frequency 123 -1 0 frequency (hz) noise voltage vs. frequency t = 25c i = 100a a r noise (nv/ hz) 500 480 340 300 380 360 440 420 460 400 320 123 -1 0 v , reverse voltage (v) reference current vs. voltage r i, r eve r se cu r r ent (a) r 500 400 -200 -300 0 -100 200 100 300 t = 25c a
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 7 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated typical characteristics lm4040-3.0 v (%) ref 1.00 0.75 -0.75 -1.00 -0.25 -0.50 0.25 0.00 0.50 i = 100a r 40 80 120 -40 0 temperature (c) reference voltage temperature coefficient 40 80 120 -40 0 temperature (c) reference voltage temperature coefficient v (%) ref 1.00 0.75 -0.75 -1.00 -0.25 -0.50 0.25 0.00 0.50 10k 100k 1m 100 1k frequency (hz) reference impedance vs. frequency t = 25c i = 100a a r c = 0 l c = 1.0f ta n t al u m l 10k 100k 1m 100 1k z , r e f e r e n c e i m p ed a n c e ( ) r 100 0.01 0.1 1 10 frequency (hz) reference impedance vs. frequency 1k 10k 100k 10 100 frequency (hz) noise voltage vs. frequency noise (nv/ hz) 650 450 550 600 500 400 12 4 -1 0 v , reverse voltage (v) reference current vs. voltage r i, r eve r se cu r r ent (a) r 500 400 -200 -300 0 -100 200 100 300 3 t = 25c a
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 8 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated typical characteristics lm4040-5.0 v (%) ref 1.00 0.75 -0.75 -1.00 -0.25 -0.50 0.25 0.00 0.50 40 80 120 -40 0 temperature (c) reference voltage temperature coefficient 40 80 120 -40 0 temperature (c) reference voltage temperature coefficient v ( % ) ref 1.00 0.75 -0.75 -1.00 -0.25 -0.50 0.25 0.00 0.50 i = 1ma r 10k 100k 1m 100 1k frequency (hz) reference impedance vs. frequency 10k 100k 1m 100 1k z , r e f e r e n c e i m p ed a n c e ( ) r 100 0.1 1 10 frequency (hz) reference impedance vs. frequency 1k 10k 100k 10 100 frequency (hz) noise voltage vs. frequency noise (nv/ hz) 1200 600 400 1000 800 123 -1 0 v , reverse voltage (v) reference current vs. voltage r i, r eve r se cu r r ent (a) r 500 400 -200 -300 0 -100 200 100 300 t = 25c a 45 6 -400
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 9 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated start up characteristics lm4040-2.5, 3.0 and 5.0 lm4040-2.5 time (s) long pulse response i n p u t & o u t p u t v o l t ag e (v) 0 2 4 6 8 10 6 5 4 2 1 0 3 time (s) short pulse response input & o utput v o ltage (v) 0 2 4 6 8 10 6 5 4 2 1 0 3 input output t = 25c r = 30k a s lm4040-3.0 time (s) long pulse response inp u t & o u t p u t v o l t age (v) 0 2 4 6 8 10 7 5 4 2 1 0 3 6 time (s) short pulse response input & o utput v o ltage (v) 0 2 4 6 8 10 7 5 4 2 1 0 3 6 lm4040-5.0 time (s) long pulse response in p u t & o u t p u t v o l t a g e (v) 0 20 40 60 80 100 10 4 2 0 6 8 12 time (s) short pulse response input & o utput v o lta g e (v) 0 2 4 6 8 10 10 4 2 0 6 8 12
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 10 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated application information in a conventional shunt regulator application ( figure 1 ), an external series resistor (r s ) is connected between the supply voltage, v s , and the lm4040. r s determines the current that flows through the load (i l ) and the lm4040 (i r ). since load current and supply voltage may vary, r s should be small enough to supply at least the minimum acceptable i r to the lm4040 even when the supply voltage is at its minimu m and the load current is at its maximum value. when the supply voltage is at its maximum and i l is at its minimum, r s should be large enough so that the current flowing through the lm4040 is less than 15 ma. r s is determined by the supply voltage, (v s ), the load and operating current, (i l and i r ), and the lm4040?s reverse breakdown voltage, v r . rl rs s ii vv r + ? = printed circuit board layout considerations lm4040s in the sot23 package have the die attached to pin 1, which results in an electrical contact between pin 2 and pin 3. therefore, pin 1 of the sot-23 package must be left floating or connected to pin 2. lm4040s in the sc70-5 package have the die attached to pin 2, which results in an electrical contact between pin 2 and pin 1. therefore, pin 2 must be left floating or connected to pin1. ordering information 25c tol voltage (v) order code qualification? package part mark reel size tape width quantity per reel 0.2% 2.5 lm4040b25fta commercial sot23 r2b 7?, 180mm 8mm 3000 lm4040b25h5ta commercial sc70-5 r2b 7?, 180mm 8mm 3000 3.0 lm4040b30fta commercial sot23 r3b 7?, 180mm 8mm 3000 lm4040b30h5ta commercial sc70-5 r3b 7?, 180mm 8mm 3000 5.0 lm4040b50fta commercial sot23 r5b 7?, 180mm 8mm 3000 lm4040b50h5ta commercial sc70-5 r5b 7?, 180mm 8mm 3000 0.5% 2.5 lm4040c25fta commercial sot23 r2c 7?, 180mm 8mm 3000 lm4040c25h5ta commercial sc70-5 r2c 7?, 180mm 8mm 3000 3.0 lm4040c30fta commercial sot23 r3c 7?, 180mm 8mm 3000 lm4040c30h5ta commercial sc70-5 r3c 7?, 180mm 8mm 3000 5.0 lm4040c50fta commercial sot23 r5c 7?, 180mm 8mm 3000 lm4040c50qfta automotive sot23 r5c 7?, 180mm 8mm 3000 lm4040c50h5ta commercial sc70-5 r5c 7?, 180mm 8mm 3000 1% 2.5 lm4040d25fta commercial sot23 r2d 7?, 180mm 8mm 3000 lm4040d25h5ta commercial sc70-5 r2d 7?, 180mm 8mm 3000 3.0 lm4040d30fta commercial sot23 r3d 7?, 180mm 8mm 3000 lm4040d30h5ta commercial sc70-5 r3d 7?, 180mm 8mm 3000 5.0 lm4040d50fta commercial sot23 r5d 7?, 180mm 8mm 3000 lm4040d50h5ta commercial sc70-5 r5d 7?, 180mm 8mm 3000 r s v s i r + i l i r i l v r
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 11 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated package outline dimensions sot23 e e l e1 d a c e1 l1 a1 b 3leads dim. millimeters inches dim. millimeters inches min max min max min max min max a - 1.12 - 0.044 e1 1.90 nom 0.075 nom a1 0.01 0.10 0.0004 0.004 e 2.10 2.64 0.083 0.104 b 0.30 0.50 0.012 0.020 e1 1.20 1.40 0.047 0.055 c 0.085 0.20 0.003 0.008 l 0.25 0.60 0.0098 0.0236 d 2.80 3.04 0.110 0.120 l1 0.45 0.62 0.018 0.024 e 0.95 nom 0.037 nom - - - - - note: controlling dimensions are in millimeters. ap proximate dimensions are provided in inches sc70-5 dim. millimeters inches dim. millimeters inches min max min max min max min max a 0.80 1.10 0.0315 0.04 33 e 2.10 bsc 0.0826 bsc a1 - 0.10 - 0.0039 e1 1.25 bsc 0.0492 bsc a2 0.80 1.00 0.0315 0. 0394 e 0.65 bsc 0.0255 bsc b 0.15 0.30 0.006 0.01 18 e1 1.30 bsc 0.0511 bsc c 0.08 0.25 0.0031 0.0098 l 0.26 0.46 0.0102 0.0181 d 2.00 bsc 0.0787 bsc a 0 8 0 8 note: controlling dimensions are in millimeters. ap proximate dimensions are provided in inches
lm4040 precision micropower shunt voltage references lm4040 document number: ds33195 rev. 5 - 2 12 of 12 www.diodes.com march 2012 ? diodes incorporated a product line o f diodes incorporated important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries rese rve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to this document and any product described herein. diodes incorporated does not assume any liability ari sing out of the application or use of this document or any product described her ein; neither does diodes incor porated convey any license under its patent or trademark rights, nor the rights of others. any customer or us er of this document or products described herein in such applica tions shall assume all risks of such use and will agree to hold diodes inco rporated and all the companies w hose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whats oever in respect of any produc ts purchased through unauthoriz ed sales channel. should customers purchase or use diodes inco rporated products for any unintended or unauthorized application, customers shall i ndemnify and hold diodes incorporated and its representatives harmless a gainst all claims, damages, expens es, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or mo re united states, international or foreign trademarks. life support diodes incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or syst ems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when proper ly used in accordance with inst ructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support devic e or system whose failure to perform can be reasonably expect ed to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifi cations of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-r elated requirements concerning their products and any use of diodes incorporated products in such safety-cri tical, life support devices or systems, notwithstanding any devic es- or systems- related information or support that may be provided by diodes inco rporated. further, customers must fully indemnify diodes inc orporated and its representatives against any damages aris ing out of the use of diodes incorporated products in such safety-critical, life su pport devices or systems. copyright ? 2012, diodes incorporated www.diodes.com

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