d isc o n tinue d pr o duct ? for ref erenc e only u s e a 3212 or a 3213 for new design. the a 3209ex and a 3210ex integrated circuits are ultra-s ens itive, pole ind e p end e n t hall- e ffect switch e s w ith a latch e d di g ital out put . t h e y ar e e s pecially s uited for operation in battery-operated, hand-held equipment s uch as cellular and cordless telephones , pagers , and palmtop computers. 2. 5 volt to 3 . 5 v olt o per atio n and a uniqu e clock i ng sc h eme t o re d uce t h e aver a g e o p e r at- ing pow er requirements ? the a 3209ex to 400 w, the a 3210ex to 25 w ! except for operating duty cycle and average operating current, the a 3209ex and a 3210ex are identical. u nlike other h all-effect switches , either a north or sout h pole o f sufficien t s t r e ngt h w ill turn the out p ut o n; in t h e a bse n ce of a mag netic f ield, th e o u t put i s off. t h e polar ity i nde p e ndence and min imal powe r re qui r emen t allows t h e s e devices to eas ily replace reed switches for s uperior reliability and eas e of manufacturing, w hile eliminating the requirement for s ignal conditioning. i m proved s tability i s mad e possible through choppe r s tab ilization (dynamic offset can cellation), which re duces t h e re s i dual offset voltag e n ormally cause d b y dev ice o v e r m o lding, temp e r ature dep e nde n cies, a n d t h e r mal st r e ss. thes e devices inclu de o n a sing le s ilicon chip a hall-voltag e gen e r ator, s mall-sign al amp lif ier , choppe r stabilization, a latch, and a mosfet o u t p ut. a dvanced bicmos processing is us ed to take advantage of low -voltage and low-po w e r requ i r ements , compon e n t match ing, ve ry low i nput-offset erro rs, and s mall c o m ponent g eometr ies . the a 3 209ex and a3 210ex a r e r ated for ope r ation o v e r a temp e r ature range of -40 c to +85 c. tw o package s tyles provide a magnetically opti- mized p ack a g e f o r most app lications. suffix ?l h? i s a min iature l ow-p rofile s u rface- m o u n t packag e while suffi x ?ua? i s a t hree- lead ultr a - min i -sip for through-hole or s urface mounting. features m icrop owe r o per ation o per ate with n o r t h or south pole 2.5 v to 3. 5 v battery o peration chopper stabilized s u p e r i or temp e r ature s tability extremely low switch-p oint d rift ins ens itive to p hys ical s tres s e sd protected to 5 kv s olid-state reliability s mall size eas ily m anufacturable with m agnet p ole independence t e e h s a t a d c 0 6 . 2 2 6 7 2 a l w ays order by complete part number: the prefix ?a? + the bas ic four-digit part number + the s uffix ? e? to indicate operating temperature range + a s u ffi x to i ndicate package style, e. g., a3210elh . p ackag e suffi x ?lh ? pinning (sot23w ) 3209 and 3210 absolu t e maxi mum ratin g s a t t a = +25 c supply voltag e, v d d ............................. 5 v m agnetic f lux d ens ity, b .......... unlimited o utput o ff v oltage, v out ..................... 5 v o utpu t curre n t, i out .......................... 1 ma junction temperature, t j ............... +170 c o per ating temper atur e range, t a ............................... -40 c to +85 c s t orage temper atur e range, t s .............................. -65 c to +170 c caut ion: these cmos dev i c e s hav e input s t a t ic prot ect ion (clas s 3) but are stil l sus cept ible to damage i f expos ed to e xtremely high sta t ic elect ric al charges. p inning is s how n view ed from branded s ide. micro p ower, u ltra-se nsit i v e hall- effect switches x dwg. ph - 016- 1 supply ground output v d d 1 2 3
3209 and 3210 micropower, ultra-sensitive hall-effect switches 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 2 functional block diagram copyright ? 2000, 2003 allegro microsystems, inc. package suffix ua pinning (ultra-mini sip) timing logic dwg. fh-020-5 latch ground output supply x dynamic offset cancellation switch sample & hold dwg. ph-016 1 supply v dd ground 3 2 output x pinning is shown viewed from branded side. 600 400 200 20 60 100 140 0 ambient temperature in c allowable package power dissipation in milliwatts dwg. gh-046-3b suffix "ua" r ja = 165 c/w 40 80 120 180 700 500 300 100 160 suffix "lh" r ja = 228 c/w 800
3209 and 3210 micropower, ultra-sensitive hall-effect switches www.allegromicro.com 3 electrical characteristics with c bypass = 0.1 f, over operating voltage and temperature range (unless otherwise specified). limits characteristic symbol test conditions min. typ. max. units operate points b ops south pole to branded side C 30 60 g b opn north pole to branded side -60 -35 C g release points b rps south pole to branded side 5.0 22 C g b rpn north pole to branded side C -27 -5.0 g hysteresis b hys |b opx - b rpx | C 7.7 C g notes: 1. as used here, negative flux densities are defined as less than zero (algebraic convention) and -50 g is less than +10 g. 2. typical data is at t a = +25 c and v dd = 2.75 v and is for design information only. magnetic characteristics with c bypass = 0.1 f, over operating voltage and temperature range (unless otherwise specified). limits characteristic symbol test conditions min. typ. max. units supply voltage range v dd operating 1) 2.5 2.75 3.5 v output leakage current i off v out = 3.5 v, b rpn < b < b rps C ?1.0 1.0 a output on voltage v out i out = 1 ma, v dd = 2.5 v C 105 300 mv awake time t awake 30 60 90 s period t period a3209ex 240 480 720 s a3210ex 30 60 90 ms duty cycle d.c. a3209ex C 12.5 C % a3210ex C 0.10 C % chopping frequency f c C 340 C khz supply current i dd(en) chip awake (enabled)0.1 C 3.0 ma (2.5 v dd 3.5 v) i dd(dis) chip asleep (disabled)1.0 10 50 a i dd(avg) a3209ex, v dd = 2.75 v C 145 425 a a3209ex, v dd = 3.5 v C 195 425 a a3210ex, v dd = 2.75 v C 8.8 25 a a3210ex, v dd = 3.5 v C 13 60 a notes: 1. operate and release points will vary with supply voltage. 2. b opx = operate point (output turns on); b rpx = release point (output turns off). 3. typical data is at t a = +25 c and v dd = 2.75 v and is for design information only.
3209 and 3210 micropower, ultra-sensitive hall-effect switches 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 4 typical operating characteristics as a function of temperature a3210-- supply current switch points 60 switch points in gauss 20 0 -20 -40 0 25 50 75 100 ambient temperature in c -50 dwg. gh-027-2 -25 b ops -60 40 b rps b rpn b opn v dd = 2.75 v 16 average supply current in a 12 10 8.0 6.0 0 25 50 75 100 ambient temperature in c -50 dwg. gh-028-6 -25 v dd = 3.5 v v dd = 2.5 v 14 v dd = 3 v a3209-- supply current 220 average supply current in a 180 160 140 120 0 25 50 75 100 ambient temperature in c -50 dwg. gh-028-7 -25 v dd = 3.5 v v dd = 3 v 200 v dd = 2.5 v
3209 and 3210 micropower, ultra-sensitive hall-effect switches www.allegromicro.com 5 switch points a3210-- supply current 60 switch points in gauss 20 0 -20 -40 2.8 3.0 3.2 3.4 3.6 supply voltage in volts 2.4 dwg. gh-057-1 2.6 b ops -60 40 b rps b rpn b opn t a = 25 c 16 average supply current in a 12 10 8.0 6.0 2.8 3.0 3.2 3.4 3.6 supply voltage in volts 2.4 dwg. gh-058-5a 2.6 14 t a = 25 c typical operating characteristics as a function of supply voltage a3209-- supply current 220 average supply current in a 180 160 140 120 2.8 3.0 3.2 3.4 3.6 supply voltage in volts 2.4 dwg. gh-058-6 2.6 200 t a = 25 c
320 9 and 321 0 micropower, ultra-sensitive hall- effect switches 1 15 nort h eas t cut off, box 15036 w orces ter, m a ssachusetts 01615-0036 (508) 853-5000 6 functional description low averag e power. internal timing circuitry activates the device for 60 s and deactivates it for the remainder of the period (480 s for the a 3209ex and 60 ms for the a 3210ex). a s hort " a w ake" time allows for s tabilization prior to the s ampling and data latching on the falling edge of the timing puls e . the output during the "sleep" time is latched in the las t s ampled s tate. the s upply current is not affected by the output state. c hopper-sta bilize d technique . th e h all element can b e c onsider ed as a re s i s tor a rra y s imilar to a w h eats t one bri dge . a large portion of the offs et is a res ult of the mis matching of thes e res i s tors . thes e devices us e a proprietary dynamic offs e t can cellation tech niq ue, w ith an inter nal high-frequ e n cy clo c k t o reduce the res idual offs et voltage of the h all element that is normally caus ed by device overmolding, temperature dependen- cies, and ther mal s t r e ss. the chopper-stab ilizin g techn iqu e cancels the mis matching of the res i s tor circuit by changing the dir ection of the current flow ing thr ough t h e hall plate usi n g c mos switches and h all voltage meas urement taps , w hile maintaing the h all-voltage s i g nal that is induced by the e x terna l mag netic flux . the sign al is then capture d by a samp le- and - hold circuit and further processed us ing low -offs et bipolar cir c u itry. this techn ique produces devices th at have a n extremely s table quies cent h all output voltage, are immune to thermal s tress, and have precis e recoverability after temperature c y cling . this techniq ue will als o s ligh tly degr ade t h e de v ice output repeatability. a relatively high s ampling frequency is u s ed in order that fas ter s ignals can be processed. m ore detailed des criptions of the circuit operation can be found in: technical p aper s t p 97-10, monolithic magnetic hall sens o r usi n g d ynam ic q uadr atur e offs et can cella tio n and technical p aper s t p 99-1, chopper -stabiliz ed am plifier s with a track- a n d -hold signa l d e m odu lato r . dwg. wh-017-1 0 period 6 0 s - "awake" "sleep" i dd(en) i dd( d is) sample & output latched dwg. eh-012-1 sample & hold x +v +v hall voltage b + ? dwg. ah-011-2 operation. the out p ut o f this d e v ice switch e s l ow ( turns o n ) w hen a magnetic field perpendicular to the h all element exceeds t h e ope r ate poi n t b ops (or i s less t h a n b opn ). after t urn-on, t h e out put i s cap a b le of si nki ng up t o 1 m a a nd t h e out put voltag e i s v out(on) . w h e n t h e magn etic field is re duced below t h e release point b rps (or increased above b rpn ), the device output switches high (turns off). the difference in the magnetic operate and release points is the hysteresis (b hys ) of the device. this built-in hysteresis allows clean switching of the output even in the presence of external mechanical vibration and electrical noise. as used here, negative flux densities are defined as less than zero (algebraic convention) and -50 g is less than +10 g.
3 2 09 and 321 0 micropower, u l tra-se nsit i v e hall- effect switches www. allegromicro. com 7 element locations p ackag e designa tor ?lh ? p ackag e designato r ?ua? output dwg. eh-013-2 0.1 f supply (3 v battery) 10 pf 50 k ? x v d d 1 2 3 1 3 2 dwg. mh-011-11a 0.0195" 0.50 mm nom branded surface active ar ea depth 0.081" 2.06 mm 0.057" 1.45 mm a 0.038" 0.96 mm 1 2 dw g . mh-025 0.011" 0.28 mm nom activ e are a depth 0.059" 1.49 mm a 3 allegr o a pplications . a llegro's pole-independent s ens ing technique allows for operation w ith either a north pole or s outh pole magnet orientation, enhancing the manufacturability of the device. the s tate-of-the-art technology provides the s ame output polarity for either pole face. i t i s st r ongly r ecommended that an external bypass cap aci- tor be connected (in clos e proximity to the h all element) betw een the s upply and ground of the device to reduce both external nois e and nois e generated by the chopper-s tabilization tech- nique. this is es pecially true due to the relatively high imped- ance of battery s upplies . the s imples t form of magnet that w ill operate thes e devices i s a ba r magn et w ith either po le near th e bra n ded surface of the device. m any other methods of operation are possible. exten- s ive applications information on magnets and h all-effect devices i s als o available in the allegr o electr onic d ata book ams-702 or application note 27701, or at www.allegromicro.com 0 +b 0 dwg. gh-043-1 -b o u tpu t on 5 v max b ops b rps b opn b rpn output voltage magnetic flux output off
3209 and 3210 micropower, ultra-sensitive hall-effect switches 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 8 package designator lh (fits sc-59a solder-pad layout) 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 vendors option within limits shown. 3. height does not include mold gate flash. 4. where no tolerance is specified, dimension is nominal. dimensions in inches (for reference only) dimensions in millimeters (controlling dimensions) dwg. ma-011-3 in 12 0.039 0.094 0.03 7 0.028 3 dwg. ma-011-3 mm 12 1.00 2.40 0.95 0.70 3 dwg. ma-010-3d in 12 0.006 0.000 0.0079 0.0050 0.083 0.073 0.118 0.106 0.037 bsc 0.022 ref 0.020 0.012 3 0.045 0.032 0 to 8 0.010 min gauge plane seating plane 0.010 bsc 0.122 0.114 dwg. ma-010-3d mm 12 0.15 0.00 0.20 0.127 2.10 1.85 3.00 2.70 0.95 bsc 0.55 ref 0.50 0.30 3 1.13 0.87 0 to 8 0.25 min gauge plane seating plane 0.25 bsc 3.10 2.90
3209 and 3210 micropower, ultra-sensitive hall-effect switches www.allegromicro.com 9 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 vendors 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 a32xxeua-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
3209 and 3210 micropower, ultra-sensitive hall-effect switches 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 10 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 responsi- bility 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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