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| the a3213xx and a3214xx integrated circuits are ultra-sensitive, pole independent hall-effect switches with a latched digital output. they are especially suited for operation in battery-operated, hand-held equipment such as cellular and cordless telephones, pagers, and palmtop computers. a 2.4 volt to 5.5 volt operation and a unique clocking scheme reduce the average operat- ing power requirements C the a3213xx to 825 w, the a3214xx to 14 w (typical at 2.75 v)! except for operating duty cycle and average operating current, the a3213xx and a3214xx are identical. unlike other hall-effect switches, either a north or south pole of sufficient strength will turn the output on; in the absence of a magnetic field, the output is off. the polarity independence and minimal power requirement allows these devices to easily replace reed switches for superior reliability and ease of manufacturing, while eliminating the requirement for signal conditioning. improved stability is made possible through chopper stabilization (dy- namic offset cancellation), which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. these devices include on a single silicon chip a hall-voltage generator, small-signal amplifier, chopper stabilization, a latch, and a mosfet output. advanced bicmos processing is used to take advantage of low-voltage and low-power requirements, component matching, very low input-offset errors, and small component geometries. suffix 'ex' devices are rated for operation over a temperature range of -40 c to +85 c; suffix 'lx' devices are rated for operation over a temperature range of -40 c to +150 c. two package styles provide a magnetically optimized package for most applications. package designator lh is a miniature low-profile surface-mount package while designator ua is a three- lead sip for through-hole mounting. features micropower operation operate with north or south pole 2.4 v to 5.5 v battery operation chopper stabilized superior temperature stability extremely low switch-point drift insensitive to physical stress esd protected to 5 kv solid-state reliability small size easily manufacturable with magnet pole independence data sheet 27622.62e always order by complete part number: the prefix a + the basic four-digit part number + a suffix letter to indicate operating temperature range + a two- letter suffix to indicate package style, e.g., a3214elh . package designator lh pinning (sot23w) 3213 and 3214 absolute maximum ratings at t a = +25 c supply voltage, v dd ............................. 6 v magnetic flux density, b .......... unlimited output off voltage, v out ..................... 6 v output current, i out .......................... 1 ma junction temperature, t j .............. +170 c operating temperature range, t a suffix 'ex' ................... -40 c to +85 c suffix 'lx' ................. -40 c to +150 c storage temperature range, t s .............................. -65 c to +170 c caution: these cmos devices have input static protection (class 3) but are still susceptible to damage if exposed to extremely high static electrical charges. pinning is shown viewed from branded side. micropower, ultra-sensitive hall-effect switches x dwg. ph-016-1 supply ground output v dd 12 3
#? 7 6 #9d '2 9d#99d(#9&+&##999 ' &#' "# , &($ 7 e9924 "0 ! timing logic dwg. fh-020-5 latch ground output supply x dynamic offset cancellation switch sample & hold dwg. ph-016 supply v dd ground output x < " 600 400 200 20 60 100 140 0 ambient temperature in c allowable package power dissipation in milliwatts dwg. gh-046-9 package suffix "ua" r ja = 165 c/w 40 80 120 180 700 500 300 100 160 package suffix "lh" r ja = 228 c/w 800 temp. code "e" temp. code "l" note C allowable package power dissipation will not be exceeded unless absolute maximum ratings (page 1) are exceeded. 3213 and 3214 micropower, ultra-sensitive hall-effect switches www.allegromicro.com 3 electrical characteristics: unless otherwise noted over operating voltage and temperature range. limits characteristic symbol test conditions min. typ. max. units operate points b ops south pole to branded side ? 42 70 g b opn north pole to branded side -70 -48 ? g release points b rps south pole to branded side 10 32 ? g b rpn north pole to branded side ? -38 -10 g hysteresis b hys |b opx - b rpx |?10?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. b opx = operate point (output turns on); b rpx = release point (output turns off). 3. typical data is at t a = +25c and v dd = 3.0 v and is for design information only. 4. 1 gauss (g) is exactly equal to 0.1 millitesla (mt). magnetic characteristics: over operating voltage and temperature range. limits characteristic symbol test conditions min. typ. max. units supply voltage range v dd operating 1) 2.4 3.0 5.5 v output leakage current i off v out = 5.5 v, b rpn < b < b rps ? <1.0 1.0 a output on voltage v out i out = 1 ma, v dd = 3.0 v ? 100 300 mv awake time t awake ?6090s period t period a3213xx ? 240 360 s a3214xx ? 60 90 ms duty cycle d.c. a3213xx ? 25 ? % a3214xx ? 0.10 ? % chopping frequency f c ? 340 ? khz supply current i dd(en) chip awake (enabled) ? ? 2.0 ma i dd(dis) chip asleep (disabled) ? ? 8.0 a i dd(avg) a3213xx ? 460 850 a a3214xx ? 11 22 a esd, human body model ? per cdf-aec-q100-002 5.0 ? ? kv esd, machine model ? per jesd22-a115 350 ? ? v 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 = +25c and v dd = 3.0 v and is for design information only. #? 7 6 #9d '2 9d#99d(#9&+&##999 " 9& #&'( && :. : 54 . ;< ) <= 88 88 $> ; = $> ; = ?& #&'> " ;(= <(> 9 '> & ; = $> ; = # #' <#(> < # ;5<= $> ; = <(> 9 '> & ; = 0 9& #&'( && :. : .44/6 3 / ; ) + = 88 88 9 <#(> < ;<= 9 <#(> < ;<= 9 <#(> < ;<= ?& #&'> " ;(= <(> 9 '> & ; = <(> 9 '> & ; = #? 7 6 #9d '2 9d#99d(#9&+&##999 : ' &#' &&#' 1 3 1 0 " d9 " ( 9 d9" + h $h" 1 " " hh" " 0 44 @ 7/a2 0 b. " " ' "" " ! ! $ " " " " " 1 ! "" 7234 " " " " " ! " ! "" " " ! " ! 2 < 4<i)9 monolithic magnetic hall sensor using dynamic quadrature offset cancellation agen odmgsdaqnafoun nuho chopper-stabilized amplifiers with a track-and-hold signal demodulator z w w wwkk kk w w w w w eoambpz-g nn moncysfysnc-nsmsmneodsdonmbssdmomnqcbnsyugmncg bmognankargossdn-soqenfoufogesdyqaunscnsmonpaqqnmogmcunocdooem smoncfouasonfcsgsn ncunsmnqommnsmagn znnl-sounsyugucgo smoncysfysnsmndafawqonc-nmsgbsgrnyfnscnhnklnagensmoncysfys dcqsaronsmn znnmognsmonkargossdn-soqensmnuoeydoenwoqcb smonuoqoamonfcsgsn ncunsgduoamoenawcdon onsmoneodsdo cysfysnmbssdmomnmsrmnsyugmnc--znn mones--ouogdonsgnsmonkaru gossdncfouasonagenuoqoamonfcsgsmnsmnsmonmamsouomsmn mam nc-nsmo eodsdoznn msmnwysqsusgnmamsouomsmnaqqcbmndqoagnmbssdmsgrnc-nsmo cysfysnodognsgnsmonfuomogdonc-nocsougaqnkodmagsdaqndswuasscg agenoqodsusdaqngcsmoz lmnymoenmouoongorassdon-qycneogmsssomnauoneo-sgoenamnqomm smagnoucnaqrowuasdndcgdogsscgnagenuennsmnqommnsmagnhnz # '# # &#' ! ! output dwg. eh-013-2 0.1 f supply (3 v battery) 10 pf 50 k x v dd dw g . mh-011-12 0.0195" 0.50 mm nom branded surface active area depth 0.081" 2.07 mm 0.053" 1.33 mm a 0.046" 0.85 mm dw g . mh-025-1 0.011" 0.28 mm nom active area depth 0.059" 1.51 mm a allegro 44/ 8 ! " " " 0 "" ( " + 1 ! " " " " " 2 " - " " allegro electronic data book nlutncun application note nthoncunas bbbzaqqorucksduczdck 0 +b 0 dwg. gh-043-1 -b output on 5 v max b ops b rps b opn b rpn output voltage magnetic flux output off #? 7 6 #9d '2 9d#99d(#9&+&##999 ( ,( &('# ! 7> 3'0;9 ' , 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. 5.add "lt" to part number for tape and reel. um8xrmm1rmemrevrs"xm ltsesaasamuaetmd4p um8xrmm1rmemrefm55m8x(x)m lutmtstddxmie.xnamrxtmrp 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 ; 5 & 0 5 $//5 >>, ,( &('# ! notes: 1. tolerances on package height and width represent allowable mold offsets. dimensions given are measured at the widest point (parting line). 2.exact body and lead configuration at vendors option within limits shown. 3.height does not include mold gate flash. 4.recommended minimum pwb hole diameter to clear transition area is 0.035" (0.89 mm). 5.where no tolerance is specified, dimension is nominal. 6.supplied in bulk pack (500 pieces per bag). dwg. mh-014e in 0.164 0.159 0.062 0.058 0.0173 0.0138 0.050 bsc 45 0.640 0.600 0.0189 0.0142 0.085 max 45 0.031 123 0.122 0.117 see note dwg. mh-014e mm 4.17 4.04 1.57 1.47 0.44 0.35 1.27 bsc 45 16.26 15.24 0.48 0.36 2.16 max 45 0.79 1 2 3 3.10 2.97 see note 2/ 2 5 ; 2 88@ = note: lead-form dimensions are the nominals produced on the forming equipment. no dimensional tolerance is implied or guaranteed for bulk packaging (500 pieces per bag). 0.620" 0.500" (15.7 mm 12.7 mm) 0.100" (2.5 mm) dwg. mh-026 0.108" (2.74 mm) 123 #? 7 6 #9d '2 9d#99d(#9&+&##999 *$ the products described herein are manufactured under one or more of the following u.s. patents: 4,761,569; 5,619,137; 5,621,319. in addition, a patent is pending for allegro's magnetic pole-independent feature. allegro has several foreign counterpart patents as well. allegro has not licensed any of these patents to any third party. 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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