note: for detailed information on purchasing options, contact your local allegro field applications engineer or sales representative. allegro microsystems, inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. the information included herein is believed to be accurate and reliable. however, allegro microsystems, inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. recommended substitutions: hall effect switches for high temperature operation a3121, a3122, and a3133 for new customers and applications, refer to the a110x family. date of status change: october 31, 2005 these parts are no longer in production the device should not be purchased for new design applications. samples are no longer available. discontinued product
these hall-effect switches are monolithic integrated circuits with tighter magnetic specifications, designed to operate continuously over extended temperatures to +150 c, and are more stable with both tem- perature and supply voltage changes. the unipolar switching character- istic makes these devices ideal for use with a simple bar or rod magnet. the three basic devices (a3121, a3122, and a3123) are identical except for magnetic switch points. each device includes a voltage regulator for operation with supply voltages of 4.5 volts to 24 volts, reverse battery protection diode, qua- dratic hall-voltage generator, temperature compensation circuitry, small- signal amplifier, schmitt trigger, and an open-collector output to sink up to 25 ma. with suitable output pull up, they can be used with bipolar or cmos logic circuits. the a3121 is an improved replacement for the ugx3113 and ugx3119. the first character of the part number suffix determines the device operating temperature range. suffix eC is for the automotive and industrial temperature range of -40 c to +85 c. suffix lC is for the automotive and military temperature range of -40 c to +150 c. two package styles provide a magnetically optimized package for most applications. suffix Clt is a miniature sot89/to-243aa transistor package for surface-mount applications; suffix Cua is a three-lead ultra-mini-sip. hall-effect switches for high-temperature operation always order by complete part number, e.g., a3121eua . absolute maximum ratings at t a = +25 c supply voltage, v cc ........................... 30 v reverse battery voltage, v rcc ........ -30 v magnetic flux density, b ....... unlimited output off voltage, v out ................ 28 v reverse output voltage, v out ........ -0.5 v continuous output current, i out ... 25 ma operating temperature range, t a suffix eC ................. -40 c to +85 c suffix lC ............... -40 c to +150 c storage temperature range, t s .............................. -65 c to +170 c features and benefits superior temp. stability for automotive or industrial applications 4.5 v to 24 v operation needs only an unregulated supply open-collector 25 ma output compatible with digital logic reverse battery protection activate with small, commercially available permanent magnets solid-state reliability no moving parts small size resistant to physical stress data sheet 27621.4c* pinning is shown viewed from branded side. 3121, 3122, and 3123 dwg. ph-003a 1 supply v cc ground 3 2 output x
3121, 3122, and 3123 hall-effect switches for high-temperature operation 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 2 functional block diagram limits characteristic symbol test conditions min. typ. max. units supply voltage v cc operating 4.5 24 v output saturation voltage v out(sat) i out = 20 ma, b > b op 140400 mv output leakage current i off v out = 24 v, b < b rp <1.010 a supply current i cc b < b rp (output off) 4.6 9.0ma output rise time t r r l = 820 ? , c l = 20 pf 0.04 2.0 s output fall time t f r l = 820 ? , c l = 20 pf 0.18 2.0 s electrical characteristics over operating temperature range, at v cc = 12 v. magnetic characteristics in gauss over operating supply voltage range. part numbers* a3121 a3122 a3123 characteristic min. typ. max. min. typ. max. min. typ. max b op at t a = 25 c 250350450 280340400 250345 440 over operating temp. range 220350500 260340430 230345 470 b rp at t a = 25 c 125 245 380 140235 330 180240300 over operating temp. range 80245 410 120235 360 160240330 b hys at t a = 25 c 70105 140 70105 140 70105 140 over operating temp. range 60105 150 70105 140 70105 140 notes: typical values are at t a = +25 c and v cc = 12 v. b op = operate point (output turns on); b rp = release point (output turns off); b hys = hysteresis (b op - b rp ). *complete part number includes a suffix to identify operating temperature range (e- or l-) and package type ( -lt or -ua). v cc x reg. dwg. fh-005-2 ground output 3 2 1 copyright ? 1992, 2002 allegro microsystems, inc.
3121, 3122, and 3123 hall-effect switches for high-temperature operation www.allegromicro.com 3 switch points output saturation voltage * complete part number includes a suffix denoting operating temperature range (e- or l-) and package type ( -lt or -ua). typical operating characteristics 0 50 100 ambient temperature in c -50 dwg. gh-038 switch point in gauss 300 400 200 100 operate point release point v = 12 v cc 150 0 -25 25 75 125 0 25 50 75 100 300 0 ambient temperature in c 200 100 -50 dwg. gh-040 saturation voltage in mv 150 -25 125 i = 20 ma v = 4.5?4 v out cc 0 25 50 75 100 ambient temperature in c -50 dwg. gh-039 125 -25 v = 12 v cc supply current in ma 7.0 6.0 5.0 4.0 150 b b rp b b op 10 15 20 25 supply voltage in volts 0 dwg. gh-041 5 supply current in ma 0 2.0 4.0 6.0 8.0 10 b b op b b rp t = +25 c a supply current supply current
3 1 2 1, 3 1 2 2 , and 3 1 2 3 hall- effect switches f o r high - tem pera t u r e o pera t ion 1 15 nort h eas t cut off, box 15036 w orces ter, m a ssachusetts 01615-0036 (508) 853-5000 4 element locations ( 0 . 005" [ 0 . 13 mm] die placement ) operation the o u t p ut of t h e s e devices (pin 3 ) switches low whe n the mag - n etic field at t h e hall element e x ceeds t h e ope r ate poi n t t hre shol d (b o p ) . a t t h i s poi n t , t h e out put voltag e i s v out(sat ) . w h e n t h e magnetic field i s re duced t o below t h e releas e poi n t t hre shol d (b r p ), t h e de v ice out put g oes h i g h . t h e d i ffe r e n ce i n th e magnetic op e r ate and releas e po i n t s is called the h yster e s i s (b hys ) of t h e de v ice. t h i s built- i n hyster e s i s allows clean switch i ng of t h e output even i n th e pre s e n ce of e x ternal mech ani- cal v i bration a n d electr ical noi s e . applications information e x tensi v e a pplications i nformation for hall- e ffect devices i s a v ailab le i n : ? hall- effect i c ap plications gui d e , application note 27701 ; ? hall- effect d evices: s old e r ing , g luing , p o ttin g , e n c a p s ulatin g, and l e ad f ormi n g , application note 27703.1; ? s old e r ing of th rou gh-hole hall-sens o r d e r vices , application not e 27703; and ? s old e r ing of su r f a ce-mount hall-se nsor devices , application not e 27703.2. a ll a r e provided in allegro electronic data boo k , ams-702. or at www.allegromicro.com change in operate point suffix ?lt? suffix ?ua? 0.043" 1.09 mm 1 3 2 dwg. mh-008-2d 0.0305" 0.775 mm nom active area dept h 0.089" 2.26 mm a 1 3 2 dwg. mh-011-2d 0.0195" 0.50 mm nom branded surface a c tiv e are a depth 0.082" 2.07 mm 0.055" 1.38 mm a 10 15 20 25 supply voltage in volts 0 dwg. gh-042 5 change in operate point in gauss -5.0 0 5.0 10 15 20 t = +25 c a allegr o
3121, 3122, and 3123 hall-effect switches for high-temperature operation www.allegromicro.com 5 dwg. ma-009-3a in 1 23 0.072 0.064 0.167 0.155 0.059 bsc 0.0189 0.0142 0.047 0.035 0.102 0.090 0.063 0.055 0.0173 0.0138 0.090 0.084 0.0221 0.0173 0.118 bsc 0.181 0.173 dwg. ma-009-3a mm 1 23 4.60 4.40 1.83 1.62 4.25 3.94 1.50 bsc 0.48 0.36 1.20 0.89 2.60 2.29 1.60 1.40 0.44 0.35 2.29 2.13 0.56 0.44 3.00 bsc package designator lt (sot89/to-243aa) dimensions in inches (for reference only) dimensions in millimeters (controlling dimensions) notes: 1. exact body and lead configuration at vendor? option within limits shown. 2. supplied in bulk pack (500 pieces per bag) or add "tr" to part number for tape and reel. 3. only low-temperature ( 240 c) reflow-soldering techniques are recommended for sot89 devices. 1 b 0.098 0.031 0.102 0.047 0.181 0.079 dwg. ma-012-3 in pads 1, 2, 3, and a standard sot89 layout pads 1, 2, 3, and b low-stress version pads 1, 2, and 3 only lowest stress, but not self aligning 2 0.028 typ 0.031 typ a 3 13 b 2.5 0.8 2.6 1.2 4.6 2.0 dwg. ma-012-3 mm pads 1, 2, 3, and a standard sot89 layout pads 1, 2, 3, and b low-stress version pads 1, 2, and 3 only lowest stress, but not self aligning 2 0.7 typ 0.8 typ a
3121, 3122, and 3123 hall-effect switches for high-temperature operation 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 6 dimensions in inches (controlling dimensions) dimensions in millimeters (for reference only) package designator ua notes: 1. tolerances on package height and width represent allowable mold offsets. dimensions given are measured at the widest point (parting line). 2. exact body and lead configuration at vendor? option within limits shown. 3. height does not include mold gate flash. 4. recommended minimum pwb hole diameter to clear transition area is 0.035" (0.89 mm). 5. where no tolerance is specified, dimension is nominal. 6. supplied in bulk pack (500 pieces per bag). dwg. mh-014e in 0.164 0.159 0.062 0.058 0.0173 0.0138 0.050 bsc 45 0.640 0.600 0.0189 0.0142 0.085 max 45 0.031 123 0.122 0.117 see note dwg. mh-014e mm 4.17 4.04 1.57 1.47 0.44 0.35 1.27 bsc 45 16.26 15.24 0.48 0.36 2.16 max 45 0.79 123 3.10 2.97 see note radial lead form (order a312xxua-lc) note: lead-form dimensions are the nominals produced on the forming equipment. no dimensional tolerance is implied or guaranteed for bulk packaging (500 pieces per bag). 0.620" 0.500" (15.7 mm 12.7 mm) 0.100" (2.5 mm) dwg. mh-026 0.108" (2.74 mm) 123
3121, 3122, and 3123 hall- effect switches f o r high - tem pera t u r e o pera t ion www.allegromicro.com 7 hall-effect sensor ics unipolar hall-effect digital switches s e c a l p e r s i s e r e t s y h e s a e l e r e t a r e p o l a i t r a p d n a . r e p o ) g ( ) g ( t n i o p ) g ( t n i o p t r a p number over oper. voltage & temp. range temp. package s comments a3121 x 220 to 500 80 to 410 60 to 150 e, l lt, ua 3019, 3113, 3119 a3122 x 260 to 430 120 to 360 70 to 140 e, l lt, ua a3123 x 230 to 470 160 to 330 70 to 140 e, l lt, ua a3141 x 30 to 175 10 to 145 20 to 80 e, l lt, ua 3040, 3140 a3142 x 115 to 245 60 to 190 30 to 80 e, l lt, ua a3143 x 205 to 355 150 to 300 30 to 80 e, l lt, ua a3144 x 35 to 450 25 to 430 >20 e, l lt, ua 3020, 3120 a3161 e <160 (typ 130 ) >30 (typ 110) 5 to 80 e lt, ua 2-wire operation a3163 e <160 (typ 98) >30 (typ 79) 5 to 40 e lt, ua 2-wire a3240 x <50 (typ 35) >5 (typ 25) typ 10 e, l lh, lt, ua chopper stabilized a3250 x <50 to >350 _ 5 to 35 j, l ua programmable, chopper stabilized a3251 x <50 to >350 _ 5 to 35 j, l ua programmable, chopper stabilized a3361 e <125 >40 5 to 30 e lh, lt, ua 2-wire, chopper stabilized, output normally high a3362 e <125 >40 5 to 30 e lh, lt, ua 2-wire, chopper stabilized, output normally low micropower omnipolar hall-effect digital switches e g a r e v a s i s e r e t s y h e s a e l e r e t a r e p o l a i t r a p y l p p u s . r e p o ) g ( ) g ( s t n i o p ) g ( s t n i o p t r a p number over oper. voltage & temp. range temp. package s current ( a) a3209 e >-60, <60 <-5, >5 typ 7.7 e lh, ua <425 (typ 145) a3210 e >-60, <60 <-5, >5 typ 7.7 e lh, ua <60 (typ 8.8) a3212 e >-55, <55 <-10, >10 typ. 8 e lh, ua <10 (typ 4.2) bipolar hall-effect digital switches s e c a l p e r s i s e r e t s y h e s a e l e r e t a r e p o l a i t r a p d n a . r e p o ) g ( ) g ( t n i o p ) g ( t n i o p t r a p number over oper. voltage & temp. range temp. package s comments ugx3132 <95 (typ 32) >-95 (typ -20) >30 (typ 52) k, l, s lt, ua 3030, 3130, 3131 ugx3133 <75 (typ 32) >-75 (typ -20) >30 (typ 52) k, l, s lt, ua ugx3134 -40 to 50 -50 to 40 5 to 55 e, l lt, ua a3260 x <30 (typ 10) >-30 (typ -10) typ 20 e, l lh, lt, ua 2 wire, chopper stabilized notes: 1) typical data is at t a = +25 c and nominal operating voltage. 2) ?x? = operating temperature range [suffix letter or (prefix)]: s (ugn) = -20 c to +85 c, e = -40 c to +85 c, j = -40 c to +115 c, k (ugs) = -40 c to +125 c, l (ugl) = -40 c to +150 c.
3121, 3122, and 3123 hall-effect switches for high-temperature operation 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 8 the products described herein are manufactured under one or more of the following u.s. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. allegro microsystems, inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. before placing an order, the user is cautioned to verify that the information being relied upon is current. allegro products are not authorized for use as critical components in life-support appliances, devices, or systems without express written approval. the information included herein is believed to be accurate and reliable. however, allegro microsystems, inc. assumes no responsibil- ity for its use; nor for any infringements of patents or other rights of third parties that may result from its use.
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