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ultralow noise, high accuracy voltage references data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or paten t rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062 - 9106, u.s.a. tel: 781.329.4700 www.analog.com fax: 781.461.3113 ? 2012 analog devices, inc. all rights reserved. features maximum temperature coefficient (tc v out ): 2 ppm /c output noise (0.1 hz to 10 hz) less than 1 v p - p at v out of 2.048 v typical initial output voltage error: 0.02% (max imum ) input voltage range: 3 v to 15 v operating temperature: ? 40c to +125 c output current: +10 ma source/? 10 ma sink low quiescent current: 950 a (max imum ) low dropout voltage: 3 00 mv at 2 ma (v out 3 v) 8 - lead soic package applications precision data acquisition systems high resolution data converters high precision measurement devices industrial instrumentation medical devices automotive battery monitoring pin configuration figure 1. 8- lead soic general description the adr45 20/ adr4525 / adr4530 / adr4533 / adr4540 / adr4550 devices are high precision , low power, low noise voltage references featuring 0. 02% maximum initial error , excellent temperature stability , and low output noi se . this family of voltage references uses a n innovative core topology to achieve high accuracy while offering industry - leading temperature stability and noise performance. the low , thermally induced output voltage hysteresis and low long - term output voltage drift of the devices also improve system accuracy over time and temperature va riations. a maximum op erating current of 950 a and a maximum low dropout voltage of 3 00 mv allow the device s to function very well in portable equipment . the ADR4520 / adr4525 / adr4530 / adr4533 / adr4540 / adr4550 series of references is provided in an 8 - lead soic package and is available in a wide range of output voltages, all of which are specified over the extended industrial temperature range of ? 40c to +125c . table 1 . selection guide model output voltage (v) ADR4520 2.048 adr4525 2.5 adr4530 3.0 adr4533 3.3 adr4540 4.0 96 adr4550 5.0 table 2 . voltage reference choices from analog devices v out (v) low cost/ low power micropower ultralow noise high voltage, high performance 2.048 adr360 ref191 adr430 adr3420 adr440 2.5 adr3425 adr291 adr431 adr03 ad1582 ref192 adr441 ad780 adr361 5.0 adr3450 adr293 adr435 adr02 ad1585 ref195 adr445 ad586 adr365 nc 1 v in 2 nc 3 gnd 4 tp 8 nc 7 v out 6 nc 5 notes 1. nc = no connect. 2. tp = test pin. do not connect. ADR4520/adr4525/ adr4530/adr4533/ adr4540/adr4550 top view (not to scale) 10203-001
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 2 of 32 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 pin configuratio n ............................................................................. 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 ADR4520 electr ical characteristics ........................................... 3 adr4525 electrical characteristics ........................................... 4 adr4530 electrical characteristics ........................................... 5 adr4533 electrical characteristics ........................................... 6 adr4540 electrical characteristics ........................................... 7 adr4550 electrical characteristics ........................................... 8 absolute maximum ratings ............................................................ 9 thermal resistance ...................................................................... 9 esd cautio n .................................................................................. 9 pin configuration and function descriptions ........................... 10 typical performance characteristics ........................................... 11 ADR4520 ..................................................................................... 11 adr4525 ..................................................................................... 14 adr4530 ..................................................................................... 17 adr4533 ..................................................................................... 20 adr4540 ..................................................................................... 23 adr4550 ..................................................................................... 26 terminology .................................................................................... 29 theory of operation ...................................................................... 30 long - term drift ......................................................................... 30 power dissipation ....................................................................... 30 applicatio ns information .............................................................. 31 basic voltage reference connection ....................................... 31 input and output capacitors .................................................... 31 location of reference in system .............................................. 31 sample applications ................................................................... 31 outline dimensions ....................................................................... 32 ordering guide ............................................................................... 32 revision history 4 /1 2 revision 0: initial version
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 3 of 32 specifications adr 4520 e lectrical c haracteristics unless otherwise noted, v in = 3 v to 1 5 v, i l = 0 ma, t a = 25c. table 3 . parameter symbol test conditions /comments min typ max unit output voltage v out 2.048 v initial output voltage error v o ut_ err b grade 0.02 % 410 v a grade 0.04 % 820 v solder heat shift 0.02 % temperature coefficient tcv out b grade , ?40c t a +125c 2 ppm/ c a grade , ?40c t a +125c 4 ppm/c line regulation v o ut / v in ? 40c t a +125c 1 10 ppm/ v load regulation v o ut /i l i l = 0 ma to +10 ma source , ?40c t a +125c 30 80 ppm/ma i l = 0 ma to ?10 ma sink , ?40c t a +125c 100 120 ppm/ma quiescent current i q ? 40c t a +125c, no load 700 950 a dropout voltage v do ? 40c t a +125c, no load 1 v ? 40c t a +125c, i l = 2 ma 1 v ripple rejection ratio rrr f in = 1 khz 90 db output current capacity i l sinking ? 8 ma sourcing 10 ma output voltage noise e np - p 0.1 hz to 10.0 hz 1.0 v p -p output voltage noise density e n 1 khz 35.8 nv /hz output voltage hysteresis v out_hys t a = temperature cycled from +25c to ?40c to +125c and back to +25c 50 ppm long - term drift v out_ltd 1000 hours at 60c 25 pp m turn - on settling time t r i l = 0 ma , c l = 1 f, c in = 0.1 f, r l = 1 k? 90 s load capacitance 1 100 f
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 4 of 32 adr 4525 e lectrical c haracteristics unless otherwise noted, v in = 3 v to 15 v, i l = 0 ma, t a = 25c. table 4 . parameter symbol test conditions/comments min typ max unit output voltage v out 2.500 v initial output voltage error v o ut_ err b grade 0.02 % 500 v a grade 0.04 % 1 mv solder heat shift 0.02 % temperature coefficient tcv out b grade , ? 40c t a +125c 2 ppm/c a grade , ? 40c t a +125c 4 ppm/c line regulation v o ut /v in ? 40c t a +125c 1 10 ppm/v load regulation v o ut /i l i l = 0 ma to +10 ma source , ?40c t a +125c 30 80 ppm/ma i l = 0 ma to ?10 ma sink , ?40c t a +125c 60 120 ppm/ma quiescent current i q ? 40c t a +125c, no load 700 950 a dropout voltage v do ? 40c t a +125c, no load 500 mv ? 40c t a +125c, i l = 2 ma 500 mv ripple rejection ratio rrr f in = 1 khz 90 db output current capacity i l sinking ? 10 ma sourcing 10 ma output voltage noise e np - p 0.1 hz to 10.0 hz 1.25 v p -p output voltage noise density e n 1 khz 41.3 nv/hz output voltage hysteresis v out_hys t a = temperature cycled from +25c to ?40c to +125c and back to +25c 50 ppm long - term drift v out_ltd 1000 hours at 60c 25 ppm turn - on settling time t r i l = 0 ma , c l = 1 f, c in = 0.1 f, r l = 1 k? 125 s load capacitance 1 100 f
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 5 of 32 adr 4530 e lectrical c haracteristics unless otherwise noted, v in = 3 .1 v to 15 v, i l = 0 ma, t a = 25c. table 5 . parameter symbol test conditions/comments min typ max unit output voltage v out 3.000 v initial output voltage error v o ut_ err b grade 0.02 % 600 v a grade 0.0 4 % 1.2 mv solder heat shift 0.02 % temperature coefficient tcv out b grade , ? 40c t a +125c 2 ppm/c a grade , ? 40c t a +125c 4 ppm/c line regulation v o ut /v in ? 40c t a +125c 1 10 ppm/v load regulation v o ut /i l i l = 0 ma to +10 ma source , ?40c t a +125c 30 80 ppm/ma i l = 0 ma to ?10 ma sink , ?40c t a +125c 60 120 ppm/ma quiescent current i q ? 40c t a +125c, no load 700 950 a dropout voltage v do ? 40c t a +125c, no load 100 mv ? 40c t a +125c, i l = 2 ma 300 mv ripple rejection ratio rrr f in = 1 khz 90 db output current capacity i l sinking ? 10 ma sourcing 10 ma output voltage noise e np - p 0.1 hz to 10.0 hz 1.6 v p -p output voltage noise density e n 1 khz 60 nv/hz output voltage hysteresis v out_hys t a = temperature cycled from +25c to ?40c to +125c and back to +25c 50 ppm long - term drift v out_ltd 1000 hours at 60c 25 ppm turn - on settling time t r i l = 0 ma , c l = 0.1 f, c in = 0.1 f, r l = 1 k? 130 s load capacitance 0.1 100 f
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 6 of 32 adr 4533 e lectrical c haracteristics unless otherwise noted, v in = 3 .4 v to 15 v, i l = 0 ma, t a = 25c. table 6 . parameter symbol test conditions/comments min typ max unit output voltage v out 3.300 v initial output voltage error v o ut_ err b grade 0.02 % 660 v a grade 0.04 % 1.32 mv solder heat shift 0.02 % temperature coefficient tcv out b grade , ? 40c t a +125c 2 ppm/c a grade , ? 40c t a +125c 4 ppm/c line regulation v o ut /v in ? 40c t a +125c 1 10 ppm/v load regulation v o ut /i l i l = 0 ma to +10 ma source , ?40c t a +125c 30 80 ppm/ma i l = 0 ma to ?10 ma sink , ?40c t a +125c 60 120 ppm/ma quiescent current i q ? 40c t a +125c, no load 700 950 a dropout voltage v do ? 40c t a +125c, no load 100 mv ? 40c t a +125c, i l = 2 ma 300 mv ripple rejection ratio rrr f in =1 khz 90 db output current capacity i l sinking ? 10 ma sourcing 10 ma output voltage noise e np - p 0.1 hz to 10.0 hz 2.1 v p -p output voltage noise density e n 1 khz 64.2 nv/hz output voltage hysteresis v out_hys t a = temperature cycled from +25c to ?40c to +125c and back to +25c 50 p pm long - term drift v out_ltd 1000 hours at 60c 25 ppm turn - on settling time t r i l = 0 ma , c l = 0.1 f, c in = 0.1 f, r l = 1 k? 135 s load capacitance 0.1 100 f
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 7 of 32 adr 4540 e lectrical c haracteristics unless otherwise noted, v in = 4.2 v to 15 v, i l = 0 ma, t a = 25c. table 7 . parameter symbol test conditions/comments min typ max unit output voltage v out 4.096 v initial output voltage error v o ut_ err b grade 0.02 % 820 v a grade 0.0 4 % 1.64 mv solder heat shift 0.02 % temperature coefficient tcv out b grade , ? 40c t a +125c 2 ppm/c a grade , ? 40c t a +125c 4 ppm/c line regulation v o ut /v in ? 40c t a +125c 1 10 ppm/v load regulation v o ut /i l i l = 0 ma to +10 ma source , ?40c t a +125c 25 80 ppm/ma i l = 0 ma to ?10 ma sink , ?40c t a +125c 50 120 ppm/ma quiescent current i q ? 40c t a +125c, no load 700 950 a dropout voltage v do ? 40c t a +125c, no load 100 mv ? 40c t a +125c, i l = 2 ma 300 mv ripple rejection ratio rrr f in = 1 khz 90 db output current capacity i l sinking ? 10 ma sourcing 10 ma output voltage noise e np - p 0.1 hz to 10.0 hz 2.7 v p -p output voltage noise density e n 1 khz 83.5 nv/hz output voltage hysteresis v out_hys t a = temperature cycled from +25c to ?40c to +125c and back to +25c 50 ppm long - term drift v out_ltd 1000 hours at 60c 25 ppm turn - on settling time t r i l = 0 ma , c l = 0.1 f, c in = 0.1 f, r l = 1 k? 155 s load capacitance 0.1 100 f
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 8 of 32 adr 4550 e lectrical c haracteristics unless otherwise noted, v in = 5.1 v to 15 v, i l = 0 ma, t a = 25c. table 8 . parameter symbol test conditions/comments min typ max unit output voltage v out 5.000 v initial output voltage error v o ut_ err b grade 0.02 % 1 mv a grade 0.04 % 2 mv solder heat shift 0.02 % temperature coefficient tcv out b grade , ? 40c t a +125c 2 ppm/c a grade , ? 40c t a +125c 4 ppm/c line regulation v o ut /v in ? 40c t a +125c 1 10 ppm/v load regulation v o ut /i l i l = 0 ma to +10 ma source , ?40c t a +125c 25 80 ppm/ma i l = 0 ma to ?10 ma sink , ?40c t a +125c 35 120 ppm/ma quiescent current i q ? 40c t a +125c, no load 700 950 a dropout voltage v do ? 40c t a +125c, no load 100 mv ? 40c t a +125c, i l = 2 ma 300 mv ripple rejection ratio rrr f in = 1 khz 90 db output current capacity i l sinking ? 10 ma sourcing 10 ma output voltage noise e np - p 0.1 hz to 10.0 hz 2.8 v p -p output voltage noise density e n 1 khz 95.3 nv/hz output voltage hysteresis v out_hys t a = temperature cycled from +25c to ?40c to +125c and back to +25c 50 ppm long - term drift v out_ltd 1000 hours at 60c 25 ppm turn - on settling time t r i l = 0 ma , c l = 0.1 f, c in = 0.1 f, r l = 1 k? 160 s load capacitance 0.1 100 f
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 9 of 32 absolute maximum r atings t a = 25 c, unless otherwise noted. table 9 . parameter rating supply voltage 16 v operating temperature range ? 40c to +125c storage temperature range ? 65c to +150 c junction temperature range ? 65c to +150c stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device re liability. thermal resistance ja is specified for the worst - case conditions; that is, a device soldered in a circuit board for surface - mount packages. table 10 . thermal resistance package type ja jc unit 8 - lead soic 120 42 c/w esd caution
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 10 of 32 pin configuration an d function descripti ons figure 2 . pin configuration table 11 . pin function descriptions pin no. mnemonic description 1 nc no connect. this pin is not connected internally. 2 v in input voltage connection. 3 nc no connect. this pin is not connected internally . 4 gnd ground . 5 nc no connect. this pin is not connected internally . 6 v out output voltage. 7 nc no connect. this pin is not connected internally . 8 tp test pin . do not connect. nc 1 v in 2 nc 3 gnd 4 tp 8 nc 7 v out 6 nc 5 notes 1. nc = no connect. 2. tp = test pin. do not connect. ADR4520/adr4525/ adr4530/adr4533/ adr4540/adr4550 top view (not to scale) 10203-002
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 11 of 32 typical performance characteristics t a = 25 c, unless otherwise noted . ADR4520 figure 3. ADR4520 output voltage vs . temperature figure 4. adr4 520 thermally induced output voltage hysteresis distribution figure 5. ADR4520 output voltage start - up response fig ure 6. ADR4520 dropout voltage vs. load current figure 7 . ADR4520 load regulation vs. temperature (sourcing) figure 8. a dr4520 load regulation vs. temperature (sinking) v out (v) temperature (c) 2.0475 2.0476 2.0477 2.0478 2.0479 2.0480 2.0481 2.0482 2.0483 2.0484 2.0485 ADR4520 ?50 ?30 ?10 10 30 50 70 90 110 130 10203-101 number of units v out_hys (ppm) 0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 ?120 ?130 ?140 ?150 ?160 ?170 ?180 ?190 ?200 0 10203-103 ch1 5.00v ch2 1.00v m40.0s a ch1 9.10v 1 2 ADR4520 v in (5v/div) v out (1v/div) c in = 0.1f c out = 0.1f r l = 1k 10203-104 dropout voltage (v) i load (ma) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 ?10 ?8 ?6 ?4 ?2 0 2 4 6 8 10 ?40c +25c +125c ADR4520 10203-106 load regulation (ppm/ma) temperature (c) 0 35 30 25 20 15 10 5 ?60 ?40 ?20 0 20 40 60 80 100 120 140 ADR4520 10203-107 load regulation (ppm/ma) temperature (c) 0 100 90 80 70 60 50 40 30 20 10 ?60 ?40 ?20 0 20 40 60 80 100 120 140 ADR4520 10203-108
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 12 of 32 figure 9. ADR4520 line regulation vs . temperature figure 10 . ADR4520 supply current vs . supply voltage figure 11 . ADR4520 output voltage noise (maximum amplitude from 0.1 hz to 10 hz) figure 12 . ADR4520 output noise spectral density figure 13 . ad r4520 ripple rejection ratio vs. frequen cy figure 14 . ADR4520 line transient response line regulation (ppm/v) temperature (c) ADR4520 10203-109 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 ?60 ?40 ?20 0 20 40 60 80 100 120 140 i sy (a) v in (v) 0 1000 800 600 400 200 0 2 4 6 8 10 12 14 16 1 3 5 7 9 11 13 15 ?40c +25c +125c ADR4520 10203- 1 10 occurrence output voltage noise distribution (v p-p) 0 120 100 80 60 40 20 2.8 2.5 2.2 1.9 1.6 1.3 1.0 0.7 0.4 ADR4520 10203- 11 1 noise density (nv rms/ hz) frequency (hz) 1 1k 100 10 100k 0.01 0.1 1 10 100 1k 10k ADR4520 10203- 1 12 ripple rejection ratio (db) frequency (hz) ?120 0 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 ADR4520 c load = 1f 100m 10 100 1k 10k 100k 1m 10m 10203- 1 13 ch1 1.00v ch2 1.00mv b w m40.0s a ch1 7.02v 2 1 ADR4520 input output ac c in = 0.1f c out = 1f t t 12.0% 10203- 1 14
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 13 of 32 figure 15 . ADR4520 output impedance vs. frequency figure 16 . ADR4520 output voltage drift distribution after reflow (shr drift) figure 17 . ADR4520 typical long - term output voltage drift (100 0 hours) output impedance () frequency (hz) 0 60 50 40 30 20 10 1m 10 100 1k 10k 100k ADR4520 r l = 100k c l = 10f r l = 1k c l = 10f r l = 1k c l = 1f r l = 100k c l = 1f 10203- 1 15 occurrence output voltage (%) 0 12 10 8 6 4 2 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 10203-116 ?0.060 ?0.055 ?0.050 ?0.045 ?0.040 ?0.035 ?0.030 ?0.025 ?0.020 ?0.015 ?0.010 ?0.005 0 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 0.050 0.055 0.060 v out drift (ppm) duration (hours) ?80 80 60 40 20 0 ?20 ?40 ?60 1000 0 200 400 600 800 100 300 500 700 900 10203- 1 17 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 14 of 32 adr4525 figure 18 . adr4525 output voltage vs . temperature figure 19 . adr4525 thermally induced output voltage hysteresis distribution figure 20 . adr4525 output voltage start - up response figure 21 . adr 4525 dropout voltage vs. load c urrent figure 22 . adr4525 load regulation vs. temperature (sourcing) figure 23 . adr4525 load regulation vs. temperature (sinking) v out (v) temperature (c) 2.4995 2.4996 2.4997 2.4998 2.4999 2.5000 2.5001 2.5002 2.5003 2.5004 2.5005 ?50 ?30 ?10 10 30 50 70 90 110 130 adr4525 10203-201 number of units v out_hys (ppm) 0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 ?120 ?130 ?140 ?150 ?160 ?170 ?180 ?190 ?200 0 10203-203 ch1 5.00v ch2 1.00v m40.0s a ch1 9.10v 1 2 adr4525 v in (5v/div) v out (1v/div) 10203-204 dropout voltage (v) i load (ma) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 ?15 15 10 5 0 ?5 ?10 ?40c +25c +125c adr4525 10203-206 load regulation (ppm/ma) temperature (c) 0 35 30 25 20 15 10 5 ?60 ?40 ?20 0 20 40 60 80 100 120 140 adr4525 10203-207 load regulation (ppm/ma) temperature (c) 0 100 90 80 70 60 50 40 30 20 10 ?60 ?40 ?20 0 20 40 60 80 100 120 140 adr4525 10203-208
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 15 of 32 figure 24 . adr4525 line regulation vs. temperature figure 25 . adr4525 supply current vs . supply voltage figure 26 . adr4525 output voltage noise (maximum amplitude from 0.1 hz to 10 hz) figure 27 . adr4525 output noise spectral density figure 28 . adr452 5 ripple rejection ratio vs. frequency figure 29 . adr4525 line transient response 10203-209 line regulation (ppm/v) temperature (c) adr4525 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 ?60 ?40 ?20 0 20 40 60 80 100 120 140 i sy (a) v in (v) 0 900 800 700 600 500 400 300 200 100 0 2 4 6 8 10 12 14 16 1 3 5 7 9 11 13 15 ?40c +25c +125c adr4525 10203-210 occurrence output voltage noise distribution (v p-p) 0 160 140 120 100 80 60 40 20 3.0 2.7 2.4 2.1 1.8 1.5 1.2 0.9 0.6 adr4525 10203-2 1 1 noise density (nv rms/ hz) frequency (hz) 1 1k 100 10 100k 0.01 0.1 1 10 100 1k 10k adr4525 10203-212 ripple rejection ratio (db) frequency (hz) ?120 0 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 adr4525 100m 10 100 1k 10k 100k 1m 10m 10203-213 ch1 1.00v ch2 1.00mv b w m200s a ch1 4.08v 2 1 adr4525 input output ac c in = 0.1f c out = 1f t t 10.0% 10203-214
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 16 of 32 figure 30 . adr4525 output impedance vs. frequency figure 31 . adr4525 output voltage drift distribution after reflow (shr drift) figure 32 . adr4525 typical long - term output voltage drift (1000 hours) output impedance () frequency (hz) 0 80 70 60 50 40 30 20 10 1m 10 100 1k 10k 100k adr4525 r l = 100k c l = 10f r l = 1k c l = 10f r l = 1k c l = 1f r l = 100k c l = 1f 10203-215 occurrence output voltage (%) 0 12 10 8 6 4 2 10203-216 ?0.060 ?0.055 ?0.050 ?0.045 ?0.040 ?0.035 ?0.030 ?0.025 ?0.020 ?0.015 ?0.010 ?0.005 0 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 0.050 0.055 0.060 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 v out drift (ppm) duration (hours) ?80 80 60 40 20 0 ?20 ?40 ?60 1000 0 200 400 600 800 100 300 500 700 900 10203-217 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 17 of 32 adr4530 figure 33 . adr4530 output voltage vs. temperature figure 34 . adr45 30 thermally induced output voltage hysteresis distribution figure 35 . adr4530 output voltage start - up response figure 36 . adr4530 supply current vs. supply voltage figure 37 . adr45 30 dropout voltage vs. load c urrent figure 38 . adr4530 load regulation vs. temperature (sourcing) v out (v) temperature (c) ?50 ?30 ?10 10 30 50 70 90 110 130 adr4530 10203-301 2.9995 2.9996 2.9997 2.9998 2.9999 3.0000 3.0001 3.0002 3.0003 3.0004 3.0005 number of units v out_hys (ppm) 0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 ?120 ?130 ?140 ?150 ?160 ?170 ?180 ?190 ?200 0 10203-303 ch1 5.00v ch2 1.00v m40.0s a ch1 3.10v 1 2 adr4530 v in (5v/div) v out (1v/div) 10203-304 c in = 0.1f c out = 0.1f r l = 1k i sy (a) v in (v) 0 13 12 11 10 9 8 7 6 5 4 3 2 1 adr4530 0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007 0.0008 0.0009 ?40c +25c +125c 10203-305 dropout voltage (v) i load (ma) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 ?15 15 10 5 0 ?5 ?10 ?40c +25c +125c adr4530 10203-306 load regulation (ppm/ma) temperature (c) 0 35 30 25 20 15 10 5 ?60 ?40 ?20 0 20 40 60 80 100 120 140 adr4530 10203-307
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 18 of 32 figure 39 . adr4530 load regulation vs. temperature (sinking) figure 40 . adr4530 line regulation vs. temperature figure 41 . adr4530 supply current vs. supply voltage figure 42 . adr4530 output voltage noise (maximum amplitude from 0.1 hz to 10 hz) figure 43 . adr4530 ou t put noise spectral density figure 44 . adr45 30 ripple rejection ratio vs. freq uency load regulation (ppm/ma) temperature (c) 0 100 90 80 70 60 50 40 30 20 10 ?60 ?40 ?20 0 20 40 60 80 100 120 140 adr4530 10203-308 10203-309 line regulation (ppm/v) temperature (c) adr4530 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 ?60 ?40 ?20 0 20 40 60 80 100 120 140 i sy (a) v in (v) 0 900 800 700 600 500 400 300 200 100 0 2 4 6 8 10 12 13 1 3 5 7 9 11 ?40c +25c +125c adr4530 10203-310 occurrence output voltage noise distribution (v p-p) 0 100 90 80 70 60 50 40 30 20 10 adr4530 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 10203-3 1 1 noise density (nv rms/ hz) frequency (hz) 1 1k 100 10 100k 0.01 0.1 1 10 100 1k 10k adr4530 10203-312 ripple rejection ratio (db) frequency (hz) ?120 0 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 100m 10 100 1k 10k 100k 1m 10m adr4530 10203-313
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 19 of 32 figure 45 . adr4530 line transient response figure 46 . adr4530 output impedance vs. frequency figure 47 . adr4530 output voltage drift distribution after reflow (shr drift) figure 48 . adr4530 typical long - term output voltage drift (100 0 hours) ch1 1.00v ch2 1.00mv b w m200s a ch1 7.02v 2 1 adr4530 input output ac c in = 0.1f c out = 1f t t 10.0% 10203-314 output impedance () frequency (hz) 0 60 50 40 30 20 10 adr4530 r l = 100k c l = 10f r l = 1k c l = 10f r l = 1k c l = 1f r l = 100k c l = 1f 10m 1m 1 10 100 1k 10k 100k 10203-315 occurrence output voltage (%) 0 12 10 8 6 4 2 10203-316 ?0.060 ?0.055 ?0.050 ?0.045 ?0.040 ?0.035 ?0.030 ?0.025 ?0.020 ?0.015 ?0.010 ?0.005 0 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 0.050 0.055 0.060 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 v out drift (ppm) duration (hours) ?80 80 60 40 20 0 ?20 ?40 ?60 1000 0 200 400 600 800 100 300 500 700 900 10203-317 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 20 of 32 adr4533 figure 49 . adr4533 output voltage vs. temperature figure 50 . adr4 533 thermally induced output voltage hysteresis distribution figure 51 . adr4533 output voltage start - up response figure 52 . adr45 33 dropout voltage vs. l oad current figure 53 . adr4533 load regulation vs. temperature (sourcing) figure 54 . adr4533 load regulation vs. temperature (sinking) v out (v) temperature (c) ?50 ?30 ?10 10 30 50 70 90 110 130 adr4533 10203-401 3.2990 3.2992 3.2994 3.2996 3.2998 3.3000 3.3002 3.3004 3.3006 3.3008 3.3010 number of units v out_hys (ppm) 0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 ?120 ?130 ?140 ?150 ?160 ?170 ?180 ?190 ?200 0 10203-403 ch1 5.00v ch2 1.00v m40.0s a ch1 3.10v 1 2 adr4533 v in (5v/div) v out (1v/div) c in = 0.1f c out = 0.1f r l = 1k 10203-404 dropout voltage (v) i load (ma) 0 0.2 0.4 0.6 0.8 1.0 ?15 15 10 5 0 ?5 ?10 ?40c +25c +125c adr4533 10203-406 load regulation (ppm/ma) temperature (c) 0 35 30 25 20 15 10 5 ?60 ?40 ?20 0 20 40 60 80 100 120 140 adr4533 10203-407 load regulation (ppm/ma) temperature (c) 0 100 90 80 70 60 50 40 30 20 10 ?60 ?40 ?20 0 20 40 60 80 100 120 140 adr4533 10203-408
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 21 of 32 figure 55 . adr4533 line regulat ion vs. temperature figure 56 . adr4533 supply current vs. supply voltage figure 57 . adr4533 output voltage noise (maximum amplitude from 0.1 hz to 10 hz) figure 58 . adr4533 output noise spectral density figure 59 . adr 4533 ripple rejection ratio vs. frequ ency figure 60 . adr4533 line transient response 10203-409 line regulation (ppm/v) temperature (c) adr4533 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 ?60 ?40 ?20 0 20 40 60 80 100 120 140 i sy (a) v in (v) 0 900 800 700 600 500 400 300 200 100 0 2 4 6 8 10 12 16 15 14 13 1 3 5 7 9 11 ?40c +25c +125c adr4533 10203-410 occurrence output voltage noise distribution (v p-p) 0 60 50 40 30 20 10 adr4533 bin 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 10203-4 1 1 noise density (nv rms/ hz) frequency (hz) 1 1k 100 10 100k 0.01 0.1 1 10 100 1k 10k adr4533 10203-412 ripple rejection ratio (db) frequency (khz) ?130 ?120 0 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 100k 0.01 0.1 1 10 100 1k 10k adr4533 10203-413 ch1 1.00v ch2 1.00mv b w m200s a ch1 7.02v 2 1 adr4533 input output ac c in = 0.1f c out = 1f t t 12.0% 10203-414
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 22 of 32 figure 61 . adr4533 output impedance vs. frequency figure 62 . adr4533 output voltage drift distribution after reflow (shr drift) figure 63 . adr4533 typical long - term output voltage drift (100 0 hours) output impedance () frequency (hz) 0 60 50 40 30 20 10 adr4533 r l = 100k c l = 10f r l = 1k c l = 10f r l = 1k c l = 1f r l = 100k c l = 1f 10m 1m 1 10 100 1k 10k 100k 10203-415 occurrence output voltage (%) 0 12 10 8 6 4 2 10203-416 ?0.060 ?0.055 ?0.050 ?0.045 ?0.040 ?0.035 ?0.030 ?0.025 ?0.020 ?0.015 ?0.010 ?0.005 0 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 0.050 0.055 0.060 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 v out drift (ppm) duration (hours) ?80 80 60 40 20 0 ?20 ?40 ?60 1000 0 200 400 600 800 100 300 500 700 900 10203-417 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 23 of 32 adr4540 figure 64 . adr4540 output voltage vs. temperature figure 65 . adr45 40 thermally induced output voltage hysteresis distribution figure 66 . adr4540 output voltage start - up response figure 67 . ad r4540 dropout voltage vs. load curre nt figure 68 . adr4540 load regulation vs. temperature (sourcing) figure 69 . adr4540 load regulation vs. temperature (sinking) v out (v) temperature (c) ?50 ?30 ?10 10 30 50 70 90 110 130 adr4540 10203-501 4.0950 4.0955 4.0960 4.0965 4.0970 number of units v out_hys (ppm) 0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 ?120 ?130 ?140 ?150 ?160 ?170 ?180 ?190 ?200 0 10203-503 ch1 5.00v ch2 1.00v m40.0s a ch1 3.10v 1 2 adr4540 v in (5v/div) v out (1v/div) c in = 0.1f c out = 0.1f r l = 1k 10203-504 dropout voltage (v) i load (ma) 0 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 ?15 15 10 5 0 ?5 ?10 ?40c +25c +125c adr4540 10203-506 load regulation (ppm/ma) temperature (c) 0 35 30 25 20 15 10 5 ?60 ?40 ?20 0 20 40 60 80 100 120 140 adr4540 10203-507 load regulation (ppm/ma) temperature (c) 0 100 90 80 70 60 50 40 30 20 10 ?60 ?40 ?20 0 20 40 60 80 100 120 140 adr4540 10203-508
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 24 of 32 figure 70 . adr4540 line regulation vs . temperature figure 71 . adr4540 supply current vs. supply voltage figure 72 . adr4540 output voltage noise (maximum amplitude from 0.1 hz to 10 hz) figure 73 . adr4540 output noise spectral density figure 74 . adr 4540 ripple rejection ratio vs. freq uency figure 75 . adr4540 line transient response 10203-509 line regulation (ppm/v) temperature (c) adr4540 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 ?60 ?40 ?20 0 20 40 60 80 100 120 140 i sy (a) v in (v) 0 900 800 700 600 500 400 300 200 100 0 2 4 6 8 10 12 16 15 14 13 1 3 5 7 9 11 ?40c +25c +125c adr4540 10203-510 occurrence output voltage noise distribution (v p-p) 0 70 60 50 40 30 20 10 adr4540 bin 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 10203-5 1 1 noise density (nv rms/ hz) frequency (hz) 1 1k 100 10 100k 0.01 0.1 1 10 100 1k 10k adr4540 10203-512 ripple rejection ratio (db) frequency (hz) ?120 0 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 100m 10 100 1k 10k 100k 1m 10m adr4540 10203-513 ch1 1.00v ch2 1.00mv b w m200s a ch1 7.02v 2 1 adr4540 input output ac c in = 0.1f c out = 1f t t 12.0% 10203-514
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 25 of 32 figure 76 . adr4540 output impedance vs. frequency figure 77 . adr4540 output voltage drift distribution after reflow (shr drift) figure 78 . adr4540 typical long - term output voltage drift (100 0 hours) output impedance () frequency (hz) 0 60 50 40 30 20 10 10m 1m 1 10 100 1k 10k 100k adr4540 r l = 100k c l = 10f r l = 1k c l = 10f r l = 1k c l = 1f r l = 100k c l = 1f 10203-515 occurrence output voltage (%) 0 12 10 8 6 4 2 10203-516 ?0.060 ?0.055 ?0.050 ?0.045 ?0.040 ?0.035 ?0.030 ?0.025 ?0.020 ?0.015 ?0.010 ?0.005 0 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 0.050 0.055 0.060 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 v out drift (ppm) duration (hours) ?80 80 60 40 20 0 ?20 ?40 ?60 1000 0 200 400 600 800 100 300 500 700 900 10203-517 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 26 of 32 adr4550 figure 79 . adr4550 output voltage vs . temperature figure 80 . adr4550 thermally induced output voltage hysteresis distribution figure 81 . adr4550 output voltage start - up response figure 82 . ad r4550 dropout voltage vs. loa d current figure 83 . adr4550 load regulation vs. temperature (sourcing) figure 84 . adr4550 load regulation vs. temperature (sinking) v out (v) temperature (c) ?50 ?30 ?10 10 30 50 70 90 110 130 adr4550 10203-601 4.9990 4.9995 5.0000 5.0005 5.0010 number of units v out_hys (ppm) 0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 ?100 ?110 ?120 ?130 ?140 ?150 ?160 ?170 ?180 ?190 ?200 0 10203-603 ch1 5.00v ch2 1.00v m40.0s a ch1 9.10v 1 2 adr4550 v in (5v/div) v out (1v/div) 10203-604 dropout voltage (v) i load (ma) 0 0.7 0.6 0.5 0.4 0.3 0.2 0.1 ?15 15 10 5 0 ?5 ?10 ?40c +25c +125c adr4550 10203-606 load regulation (ppm/ma) temperature (c) 0 35 30 25 20 15 10 5 ?60 ?40 ?20 0 20 40 60 80 100 120 140 adr4550 10203-607 load regulation (ppm/ma) temperature (c) 0 100 90 80 70 60 50 40 30 20 10 ?60 ?40 ?20 0 20 40 60 80 100 120 140 adr4550 10203-608
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 27 of 32 figure 85 . adr4550 line regulation vs. temperature figure 86 . adr4550 supply current vs . supply voltage figure 87 . adr4550 output voltage noise (maximum amplitude from 0.1 hz to 10 hz) figure 88 . adr4550 output noise spectral density figure 89 . adr455 0 ripple rejection ratio vs. f requency figure 90 . adr4550 line transient response 10203-609 line regulation (ppm/v) temperature (c) adr4550 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 ?50 0 50 100 150 i sy (a) v in (v) 0 900 800 700 600 500 400 300 200 100 0 2 4 6 8 10 12 16 15 14 13 1 3 5 7 9 11 ?40c +25c +125c adr4550 10203-610 occurrence output voltage noise distribution (v p-p) 0 9 8 7 6 5 4 3 2 1 3.7 3.5 3.3 3.1 2.9 2.7 2.5 2.3 2.1 1.9 10203-611 adr4550 noise density (nv rms/ hz) frequency (hz) 1 1k 100 10 100k 0.01 0.1 1 10 100 1k 10k 10203-612 adr4550 ripple rejection ratio (db) frequency (hz) ?120 0 ?20 ?40 ?60 ?80 ?100 100k 0.01 0.1 1 10 100 1k 10k 10203-613 adr4550 ch1 1.00v ch2 1.00mv b w m200s a ch1 7.02v 2 1 adr4550 input output ac c in = 0.1f c out = 1f t t 12.0% 10203-614
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 28 of 32 figure 91 . adr4550 output impedance vs. frequency figure 92 . adr4550 output voltage drift distribution after reflow (shr drift) figure 93 . adr4550 typical long - term output voltage drift (100 0 hours) output impedance () frequency (hz) 0 140 100 120 80 60 40 20 1m 10 100 1k 10k 100k adr4550 r l = 100k c l = 1f r l = 1k c l = 1f r l = 1k c l = 0.1f r l = 100k c l = 0.1f 10203-615 occurrence output voltage (%) 0 12 10 8 6 4 2 10203-616 ?0.060 ?0.055 ?0.050 ?0.045 ?0.040 ?0.035 ?0.030 ?0.025 ?0.020 ?0.015 ?0.010 ?0.005 0 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 0.050 0.055 0.060 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550 v out drift (ppm) duration (hours) ?80 80 60 40 20 0 ?20 ?40 ?60 1000 0 200 400 600 800 100 300 500 700 900 10203-617 ADR4520 adr4525 adr4530 adr4533 adr4540 adr4550
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 29 of 32 terminology dropout voltage (v do ) d ropout voltage, sometimes referred to as supply voltage headroom or supply output voltage differential, is defined as the minimum voltage differential between the input and output such that the output voltage is maintained to within 0. 1% accuracy . v do = (v in ? v out ) min |i l = constant because the dropout voltage depends on the current passing through the device, it is always specified for a given load curre nt. in series mode devices, the d ropout voltage typically increases proportionally to the load current ( see fig ure 6 , figure 21, figure 37, figure 52, figure 67 , and figure 82) . temperature coefficient (tcv o ut ) the temperature coefficient relates the change in the output voltage to the change in the ambient temperature of the device, as normalized by the output voltage at 25c. this parameter is determined by the box method , which is represented by the following equation: 6 10 ) ( ) ( )} , , ( { )} , , ( { ? ? = 1 3 2 out 3 2 1 out 3 2 1 out out t t t v t t t v min t t t v max tcv where: tcv out is expressed in ppm/c . v out (t x ) is the output voltage at temperature t x . t 1 = ?40c . t 2 = +25c . t 3 = +125c . this three - point method ensures that tcv out accurately portrays the maximum difference between any of the three temperatures at which the output voltage of the part is measured. the tcv out for the ADR4520 / adr4525 / adr4530 / adr4533 / adr4540 / adr4550 is fully tested over three temperature s: ? 40 c, + 25 c , and + 125 c . thermally induced output voltage hysteresis (v out_hys ) thermally induced o utput voltage hysteresis represents the change in the output voltage after the device is exposed to a specified temper ature cycle. this is expressed as either a shift in voltage or a difference in ppm from t he nominal output . 6 25 _ _ 25 _ _ 10 ? = ? c out tc out c out hys out v v v v [ppm] where: v o ut _ 25c is the out put voltage at 25c . v out_tc is the output voltage after temperature cycling . long - term stability (v out_ltd ) long - term stability refers to the shift in the output voltage at 60c after 1000 hours of operation in a 60c environment. the a mbient temperature is kept at 60c to ensure that the temperature chamber does not switch randomly between heating and cooling, which can cause instability over the 1000 hour measurement. this is also expressed as either a shift in voltage or a difference in ppm from the nominal output. 6 _ 10 ) ( ) ( ) ( ? = ? 0 out 0 out 1 out ltd out t v t v t v v [ppm] where: v out (t 0 ) is the v out at 6 0c at time 0. v out (t 1 ) is the v out at 6 0c after 1000 hours of operation at 6 0c. line regulation line regulation refers to the change in output voltage in response to a given change in input voltage and is expressed in percent per volt, ppm per volt, or v per volt change in input voltage. this parameter accounts for the effects of s elf - heating. load regulation load regulation refers to the change in output voltage in response to a given change in load current and is expressed in v per ma, ppm per ma, or ohms of dc output resistance. this parameter accounts for the effects of self - heating. solder heat resistance (shr) shift shr shift refers to the permanent shift in output voltage that is induced by exposure to reflow soldering and is expressed in units of ppm. this shift is caused by ch anges in the stress exhibited on the die by the package materia ls when these materials are exposed to high tempera tures. this effect is more pronounced in lead - free soldering processes due to higher reflow temperatures .
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 30 of 32 theory of operation the ADR4520 / adr4525 / adr4530 / adr4533 / adr4540 / adr4550 series of references uses a unique core topology for extremely high accuracy, stability, and noise performance. t hree parameters contribute to the accuracy of the dc output of a voltage reference: initial accuracy, temperature coefficient, and long - term drift. with an outstanding guaranteed in itial error of 0.02% and a low temperature coefficient of 2 ppm/ c max imum, this series of voltage references is perfect for hig h precision applications. the industry - leading long - term stability of the devices means that systems need less frequent field calibration and that there is a reduction in the costly preshipment system burn - in time. long - t erm drift one of the key par ameters of the ADR4520 / adr4525 / adr4530 / adr4533 / adr4540 / adr4550 re ferences is long - term stability the output drift over time that the device is powered up. regardless of output voltage, internal testing during deve lopment showed a typical drift of approximately 25 p pm after 1000 hours of continuous, nonl o a ded operation in a 6 0 c extremely stable temperature controlled environment. note that the majority of the long - term drift typically occurs in the first 200 hours to 300 hours of operation. for systems that require highly stable output voltages over long periods of time, the designer should consider burning in the devices prior to use to minimize the amount of output drift exhibited by the reference over time. see the an - 713 application note , the effect of long - term drift on voltage references , at www.analog.com for more information regarding the effects of long - term drift and ho w it can be minimized. power dissipation the ADR4520 / adr4525 / adr4530 / adr 4533/ adr4540 / adr4550 voltage references are capable of sourcing and sinking up to 10 ma of load current at room temperature across the rated input voltage range. however, when used in applications subject to high ambient temperatures, the input voltage and load current should be carefully monitored to ensure that the device does not exceeded its maximum power dissipation rating. the maximum power dissipation of the device can be calculated via the following equation: ja a j d t t p ? = where: p d is the device power dissipation. t j is the device junction temperature. t a is the ambient temperature. ja is the package (junction - to - air) thermal resistance. due to th is relationship, acceptable load current in high temperature conditions may be less than the maximum current sourcing capability of the device. in no case should the part be operated outside of its maximum power rating because doing so may result in premat ure failure or permanent damage to the device.
data sheet ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 rev. 0 | page 31 of 32 applications informa tion basic voltage refere nce connection the circuit shown i n figure 94 illustrates the basic configuration for the ADR4520 / adr4525 / adr4530 / adr4533 / adr4540 / adr4550 family of voltage references . figure 94 . ADR4520 / adr4525 / adr4530 / adr4533 / adr4540 / adr4550 simplified schematic input and output cap acitors input capacitors a 1 f to 10 f electrolytic or ceramic capacitor can be connected to the input to improve transient response in application s where the supply voltage may fluctuate. an additional 0.1 f ceramic capacitor should be connected in parallel to reduce supply noise. output capacitors an output capacitor is required for stability an d to filter out low level voltage noise. the minimum value of the output capacitor is shown in table 12. table 12. minimum c out value part number minimum c out value ADR4520, adr4525 1.0 f adr4530, adr4533, adr4540, adr4550 0.1 f an additional 1 f to 10 f electrolytic or ceramic capacitor can be added in parallel to improve transient performance in response to sudden changes in load current; however, the designer should keep in mind that doing so will increase the turn - on time of the device. location of reference in system the ADR4520 / adr4525 / adr4530 / adr4533 / adr4540 / adr4550 reference should be placed as close to the load as possible to minimize the length of the output traces and, therefore, the error introduced by the voltage drop . current flowing through a pcb trace produces an ir voltage drop ; with longer traces, this drop can reach several mi llivolts or more, introducing considerable error into the output voltage of the reference. a 1 inch long, 5 mm wide trace of 1 ounce copper has a resistance of approximately 100 m at room temperature; at a load current of 10 ma, this can introd uce a full millivolt of error. sample applications bipolar output reference figure 95 shows a bipolar reference configuration. by connecting the output of th e adr 4550 to the inve rting terminal of an operational amplifier, it is pos sible to obtain both positive and negative reference voltages. r1 and r2 must be matched as closely as possible to ensure minimal difference between the negative and positive outputs. resistors with low temperature coefficients must also be used if the cir cuit is used in environments with large temperature swings; otherwise, a voltage difference develops between the two outputs as the ambient temperature changes. figure 95 . adr 45 50 bip o lar output reference boosted output current reference figure 96 shows a configuration for obtaining higher current drive capability from the ADR4520 / adr4525 / adr4530 / adr4533 / adr4540 / adr4550 references without sacrificing accuracy. the op amp regulates the current flow through the mosfet until v out equals the output voltage of the reference; current is then drawn directly from v in instead of from the reference itself, allowing increased current drive capability. figure 96 . boosted output current reference because the current - sourcing capability of this circuit depends only on the i d rating of the mosfet, the output drive capability can be adjusted to the application simply by choosing an appropriate mosfet. in all cases, t he v out pin shoul d be tied directly to the load device to maintain maximum output voltage accuracy. 10203-054 v in gnd v ref band gap v in +15v ?15v ?5v +5v ada4000-1 0.1f 1f 0.1f r1 10k? r2 10k? r3 5k? adr4550 v in v out gnd 2 6 4 10203-055 10203-056 c l c l 0.1f 2n7002 ad8663 v in u6 v out +16v 0.1f 1f r1 100? r l 200? ADR4520/adr4525/ adr4530/adr4533/ adr4540/adr4550 v in v out gnd 2 6 4 part number minimum c l ADR4520, adr4525 1.0f adr4530, adr4533, adr4540, adr4550 0.1f
ADR4520/adr4525/adr4530/adr4533/adr4540/adr4550 data sheet rev. 0 | page 32 of 32 outline dimensions figure 97 . 8- lead standard small outline package [ soic _n] narrow body (r - 8) dimensions shown in millimeters and (inches) ordering guide model 1 temperature range package description package option ordering quantity ADR4520arz ? 40c to +125c 8 - lead soic_n r -8 98 ADR4520arz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 ADR4520brz ? 40c to +125c 8 - lead soic_n r -8 98 ADR4520brz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 adr4525arz ? 40c to +125c 8 - lead soic_n r -8 98 adr4525arz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 adr4525brz ? 40c to +125c 8 - lead soic_n r -8 98 adr4525brz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 adr45 3 0arz ? 40c to +125c 8 - lead soic_n r -8 98 adr45 3 0arz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 adr4530brz ? 40c to +125c 8 - lead soic_n r -8 98 adr4530brz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 adr4533arz ? 40c to +125c 8 - lead soic_n r -8 98 adr4533arz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 adr4533brz ? 40c to +125c 8 - lead soic_n r -8 98 adr4533brz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 adr4540arz ? 40c to +125c 8 - lead soic_n r - 8 98 adr4540arz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 adr4540brz ? 40c to +125c 8 - lead soic_n r -8 98 adr4540brz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 adr4550arz ? 40c to +125c 8 - lead soic_n r -8 98 adr4550arz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 adr4550brz ? 40c to +125c 8 - lead soic_n r -8 98 adr4550brz -r7 ? 40c to +125c 8 - lead soic_n r -8 1,000 1 z = rohs compliant part. controlling dimensions are in millimeters; inch dimensions (in p arentheses) are rounded-off millimeter equiv alents for reference onl y and are not appropria te for use in design. compliant t o jedec st andards ms-012-aa 012407-a 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.015 7) 0.50 (0.0196) 0.25 (0.0099) 45 8 0 1.75 (0.0688) 1.35 (0.05 32) sea ting plane 0.25 (0.0098) 0.10 (0.0040) 4 1 8 5 5.00 (0.19 68) 4.80 (0.189 0) 4.00 (0.1574) 3.80 (0.14 97) 1.27 (0.050 0) bsc 6.20 (0.2441) 5.80 (0.2284) 0.51 (0.020 1) 0.31 (0.012 2) coplanarity 0.10 ? 2012 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d10203 - 0 - 4/12(0)

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