11.7 volt temperature compensated zener reference diodes scottsd a l e division 1n941 thru 1n946b- 1 w w w . mi c r o s e m i . c o m 1 n 9 4 1 - 1 n 9 4 6 b - 1 9 4 1 - 1 n 9 4 6 b - 1 descripti on appeara n c e the pop ula r 1n9 41 thru 1 n 94 6b se rie s of zero-t c referen c e dio des provide s a se lection of 11. 7 v nominal voltage s and t e mpe r ature coeffici ents to as low a s 0.0 002%/ o c fo r minimal volta ge ch ang e wi th temperature whe n ope rate d at 7.5 ma . these gla ss axial-lea ded do -7 referen c e dio des a r e al so available in jan, jantx, and ja ntxv military qualifications. micro s emi a l so offers nu mero us oth e r zener reference diod e pro d u c ts for a variet y of other voltage s from 6.2 v to 200 v. do-7 (do-204aa) import a n t : f o r the most cur r e n t data, consult mi c r os e m i ? s w e bsite: http:// www .microsemi.com features a p p l i c at ions / be ne fi ts ? jedec reg i ste r ed 1n 941 thr u 1n94 6b serie s ? standar d refer ence vo ltag e of 11.7 v + / - 5% w i t h tighter toler anc es also av ail a b l e ? 1n9 41b, 94 2b, 943b, 94 4b, 945b als o hav e militar y qua lificati on to mil-prf - 195 0 0 /157 u p to the jant xv level b y add in g jan, jant x, or jant xv prefi x es to part numbers as w e ll as ?-1? suffi x, e.g. jant x1n9 44b -1, etc. ? internal meta ll urgic a l bo nds ? jans equiv a le nt avail abl e via scd ? radi atio n har d ene d dev ices a v aila bl e b y c h a ngi ng ?1n? prefi x to ?rh?, e.g. rh9 44b, rh9 45b, etc. also cons ult factor y for ?rh? data she e t bro c hure ? provid es mini mal volta ge ch ang es over a b r oad temperatur e ra nge ? f o r instrument ation a nd oth e r circuit desi gns requ irin g a stable vo ltag e referenc e ? maximum tem peratur e coeffi cient sel e ction s avail a b l e from 0.01%/oc to 0. 000 2%/oc ? t i ght reference voltage tol e ra nces ava ila bl e at 11.7 v nomin al val u es b y add in g the tolera nce 1 % , 2%, 3%, etc. after the part num ber for further ide n tificatio n e. g. 1n94 4b-2 %, 1n94 5a-1%, 1n9 44b-1- 1 %, etc. ? f l exibl e a x i a l-l ead mo unti ng termina ls ? nons ensitiv e to esd per mil - st d-750 method 1 0 2 0 max i mu m rat ing s mechan ic al an d pa ckagin g ? operatin g & storag et empera t ure: -65 o c to +175 o c ? dc po w e r d i ss ipati on: 500 m w @ t l = 25 o c and maximum curr ent i zm of 39 ma. not e : f o r optimum voltag e-temper ature stabi lit y , i z = 7.5 ma (less than 95 mw in dissi pated p o w e r) ? sold er temper atures: 260 o c for 10 s (max i mum) ? case: hermetically sealed glass case w i th do-7 (d o-2 0 4 aa) pa cka ge ? t e rminals: t i n-lead pl ated and sol der abl e per mil-st d-750, method 2 0 2 6 ? marking: part number an d cathod e ba nd ? polarit y : r e ferenc e di ode to be oper ated w i th the ban de d en d positiv e w i th respect to the opp osite e nd ? t ape & reel optio n: standa rd per eia-296 (add ?t r? suffix to part number) ? w e igh t : 0.2 grams. ? see pack a g e d i mensi ons o n l a st page m i cro semi scottsdale division 8700 e. thom as rd. po bo x 139 0, scottsdale, az 85252 usa, ( 4 8 0 ) 941- 6300, fax: (480) 947-1 503 page 1 cop y right ? 200 3 8-21-2 003 rev a
11.7 volt temperature compensated zener reference diodes scottsd a l e division 1n941 thru 1n946b- 1 w w w . mi c r o s e m i . c o m 1 n 9 4 1 - 1 n 9 4 6 b - 1 *electric a l ch ara cteri s tic s @ 25 o c, u n less otherwise specified zener vo lt a g e v z @ i zt (no t e 4) zener test curren t i zt ma x i m u m zener imped a n ce (no t e 2) z zt @ i zt ma x i m u m reverse curren t i r @ 8 v vo lt a g e temper a t ure st a b ili t y (no t e 3 & 4 ) ? v zt ma x i m u m temper a t ure ra n g e effective temper a t ure coef ficien t vz jedec type number (no t e 1, 5 & 6) v o l t s m a o h m s a m v o c % / o c 1n9 41 1n9 4 1 a 1n9 41b 11.12- 12.2 8 11.12- 12.2 8 11.12- 12.2 8 7.5 7.5 7.5 30 30 30 15 15 15 88 181 239 0 to + 75 -55 to + 100 -55 to + 150 0.01 0.01 0.01 1n9 42 1n9 4 2 a 1n9 42b 11.12- 12.2 8 11.12- 12.2 8 11.12- 12.2 8 7.5 7.5 7.5 30 30 30 15 15 15 44 90 120 0 to + 75 -55 to + 100 -55 to + 150 0.005 0.005 0.005 1n9 43 1n9 4 3 a 1n9 43b 11.12- 12.2 8 11.12- 12.2 8 11.12- 12.2 8 7.5 7.5 7.5 30 30 30 15 15 15 18 36 47 0 to + 75 -55 to + 100 -55 to + 150 0.002 0.002 0.002 1n9 44 1n9 4 4 a 1n9 44b 11.12- 12.2 8 11.12- 12.2 8 11.12- 12.2 8 7.5 7.5 7.5 30 30 30 15 15 15 9 18 24 0 to + 75 -55 to + 100 -55 to + 150 0.001 0.001 0.001 1n9 45 1n9 4 5 a 1n9 45b 11.12- 12.2 8 11.12- 12.2 8 11.12- 12.2 8 7.5 7.5 7.5 30 30 30 15 15 15 4 9 12 0 to + 75 -55 to + 100 -55 to + 150 0.000 5 0.000 5 0.000 5 1n9 46 1n9 4 6 a 1n9 46b 11.12- 12.2 8 11.12- 12.2 8 11.12- 12.2 8 7.5 7.5 7.5 30 30 30 15 15 15 1.8 3.6 4.7 0 to + 75 -55 to + 100 -55 to + 150 0.000 2 0.000 2 0.000 2 *jedec registered data. notes : 1. for tighte r voltages tolerances, add a h y p henated s u ffix to the pa rt n u mber fo r desire d tolerance at th e end of the p a rt num ber, e.g . 1n944b -2% , 1n945b-1 %, 1 n 944b-1 -1%, etc. 2. measured b y sup e rimposing 0. 75 ma ac rms on 7. 5 ma dc @ 25 o c. 3. the ma ximum allowable change o b served over the entire tempe r atu r e rang e i.e., the diode voltage w ill not exceed t he specifie d mv change at an y discrete temperatu r e bet w e en the e s tablished lim its. 4. voltage measure m ents to be perf o rmed 15 secon d s after application of dc current. 5. the 1n9 41b, 1n 942b, 1n943b, 1 n 944b, 1n94 5b also have militar y qualification to mil-prf-19500 / 157 up to the ja ntxv level b y adding jan, jantx, or jantxv p r efixes to pa rt nu mbers as w e ll as ?-1? suffi x, e.g. j a ntx1n944b -1, jantxv1n945 b-1, etc. 6. designate radiat ion hardene d de vices w i th ?rh? p r efix instead of ?1 n?, i.e. rh9 44b instead of 1n944 b. graphs change in tempe r ature coefficient (mv/ o c) the curve shown in figure 1 is typical of the diode series and greatly sim p lifies the estim a tion of the te m p e r atur e coefficient (tc ) when t he di ode is operated at currents othe r than 7.5 m a. exam ple: a di ode in this series is operated at a current of 7.5m a and has s pecified tem p er ature co efficient (tc ) lim its of +/-0.002% / o c. t o obtain the typical temperat ure coefficient lim its for this sam e diode oper at ed at a curr ent of 6.0m a, the new t c lim its ( % / o c) can be estim a ted using the graph i n figure 1. at a test current of 6.0 m a the cha nge in te m p e r at ure coefficient (tc ) is approximately ?0.0009%. o c. the algeb raic sum of +/ - 0.002% o c and ? 0 .0009%/ o c give s the new estim a ted lim its of +0.0011%/o c an d -0.0029 %/oc. change in tempe r ature coefficient (%/ o c) i z ? operati ng cur r ent (ma ) figure 1 typical cha nge of temperature coeffi cient wit h change i n oper ating current. m i cro semi scottsdale division 8700 e. thom as rd. po bo x 139 0, scottsdale, az 85252 usa, ( 4 8 0 ) 941- 6300, fax: (480) 947-1 503 page 2 cop y right ? 200 3 8-21-2 003 rev a
11.7 volt temperature compensated zener reference diodes m i cro semi scottsdale division 8700 e. thom as rd. po bo x 139 0, scottsdale, az 85252 usa, ( 4 8 0 ) 941- 6300, fax: (480) 947-1 503 page 3 cop y right ? 200 3 8-21-2 003 rev a w w w . mi c r o s e m i . c o m scottsd a l e division 1n941 thru 1n946b- 1 1 n 1 - 1 n 9 4 6 b - 1 1 - 1 n 9 4 6 b - 1 this curve in figure 2 illustrates the change of diode voltage arising from t he eff e ct of im pedance. it is in effect, an exploded view of the z e n e r ope rati ng region of th e i - v characteristic. in conjunction with figur e 1, t h is curve can be used to estim a te total voltage regu lation under conditions of both varying tem p er ature and current. ? v z ? ch ange in zener voltag e ( m v) i z ? ope r ating c u rrent (ma) figure 2 typical change of ze ner voltage with cha nge in operating current. dimen s io ns 9 4 9 4 mm all dimensio n s i n i n c h
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