always order by complete part number, e.g., a3134elt . features superior temperature stability operation from unregulated supply open-collector 25 ma output reverse battery protection activate with small, commercially available permanent magnets solid-state reliability small size resistant to physical stress this low-hysteresis bipolar hall-effect switch is an extremely temperature-stable and stress-resistant sensor especially suited for operation over extended temperature ranges to +150 c. superior high-temperature performance is made possible through a novel schmitt trigger circuit that maintains operate and release point stability by compensating for temperature changes in the hall element. additionally, internal compensation provides magnetic switch points that become more sensitive with temperature, hence offsetting the usual degradation of the magnetic field with temperature. its low hysteresis makes this device ideal for detecting small changes in magnetic field strength or for use with inexpensive magnets. the device includes on a single silicon chip a voltage regulator, quadratic hall-voltage generator, temperature compensation circuit, signal amplifier, schmitt trigger, and a buffered open-collector output to sink up to 25 ma. the on-board regulator permits operation with supply voltages of 3.8 volts to 24 volts. the first character of the part number suffix determines the device operating temperature range. suffix eC is for -40 c to +85 c, and suffix lC is -40 c to +150 c. three package styles provide a magneti- cally optimized package for most applications. suffix Clt is a minia- ture sot-89/to-243aa transistor package for surface-mount applica- tions; suffix Cu is a three-lead plastic mini-sip while suffix Cua is a three-lead ultra-mini-sip. pinning is shown viewed from branded side. 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 .................. 30 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 data sheet 27631.4b 3134 bipolar hall-effect switch for high-temperature operation dwg. ph-003a 1 supply v cc ground 3 2 output x
3134 low-hysteresis bipolar hall-effect switch for high-temp. operation 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 limits characteristic symbol test conditions min. typ. max. units supply voltage v cc operating 3.8 24 v output saturation voltage v out(sat) i out = 20 ma, b > b op 175 400 mv output leakage current i off v out = 24 v, b < b rp 0.05 1.0 a supply current i cc b < b rp (output off) 3.2 9.0 ma b > b op (output on) 5.0 ma output rise time t r r l = 820 ? , c l = 20 pf 100 ns output fall time t f r l = 820 ? , c l = 20 pf 100 ns electrical characteristics over operating temperature range, at v cc = 12 v. magnetic characteristics over operating supply voltage range. v cc x reg. dwg. fh-005-3 ground output 1 3 2 functional block diagram limits characteristic symbol test conditions min. typ. max. units operate point b op at t a = +25 c-408.550g over oper. temp. range -40 C 50 g release point b rp at t a = +25 c-50-1940g over oper. temp. range -50 C 40 g hysteresis b hys at t a = +25 c 102750 g over oper. temp. range 5.0 C 55 g copyright ? 1995, 1999, allegro microsystems, inc. notes: b op = operate point (output turns on); b rp = release point (output turns off); b hys = hysteresis (b op - b rp ). as used here, negative flux densities are defined as less than zero (algebraic convention). typical values are at t a = +25 c and v cc = 12 v.
3134 low-hysteresis bipolar hall-effect switch for high-temp. operation typical operating characteristics 0 25 50 75 100 ambient temperature in c -50 dwg. gh-053 125 -25 supply current in ma 5.0 4.0 3.0 2.0 1.0 150 v = 12 v cc b < b rp v = 24 v cc v = 4.5 v cc output saturation voltage supply current 0 25 50 75 100 ambient temperature in c -50 dwg. gh-052 125 -25 switch point in gauss 40 20 0 -20 -40 release point operate point 150 cc v = 4.5 v?4 v switch points hysteresis 0 25 50 75 100 ambient temperature in c -50 dwg. gh-051 125 -25 hysteresis in gauss 20 10 0 150 30 cc v = 4.5 v 24 v 40 50 0255075 100 300 0 ambient temperature in c 200 100 -50 dwg. gh-029 saturation voltage in mv 150 -25 125 i = 20 ma v = 4.5 24 v out cc
3134 low-hysteresis bipolar hall-effect switch for high-temp. operation 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 applications information hall effect applications information is available in the hall-effect ic applications guide (an 27701), which can be found in the latest issue of allegro microsystems electronic data book , ams-702, or at www.allegromicro.com operation the output of these devices (pin 3) switches low when the magnetic field at the hall sensor exceeds the operate point threshold (b op ). at this point, the output voltage is v out(sat) . when the magnetic field is reduced to below the release point (b rp ) the device output goes high. note especially that release can occur when the magnetic field is removed but to ensure release, a field reversal is required. the difference in the magnetic operate and release points is called 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. suffix ua sensor locations ( 0.005" [0.13 mm] die placement) 1 3 2 dw g . mh-011-4b 0.018" 0.46 mm nom branded surface active area depth 0.083" 2.10 mm 0.060" 1.51 mm a suffix u 1 3 2 dw g . mh-002-7b 0.015" 0.38 mm nom branded surface active area depth 0.077" 1.96 mm 0.092" 2.33 mm a suffix lt 1 3 2 dw g . mh-008-4b 0.030" 0.76 mm nom active area depth 0.050" 1.27 mm 0.090" 2.27 mm a
3134 low-hysteresis bipolar hall-effect switch for high-temp. operation dimensions in millimeters (controlling dimensions) dwg. ma-009-3 in 1 23 0.064 0.072 0.155 0.167 0.059 bsc 0.014 0.019 0.035 0.047 0.090 0.102 0.055 0.063 0.014 0.017 0.084 0.090 0.017 0.022 0.118 bsc 0.173 0.181 package designator lt (sot-89/to-243aa) dimensions in inches (for reference only) dwg. ma-009-3 mm 1 23 4.40 4.60 1.62 1.83 3.94 4.25 1.50 bsc 0.36 0.48 0.89 1.20 2.29 2.60 1.40 1.60 0.35 0.44 2.13 2.29 0.44 0.56 3.00 bsc 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.
3134 low-hysteresis bipolar hall-effect switch for high-temp. operation 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 dwg. mh-003d mm 1.60 1.50 0.46 0.38 0.41 1.27 1 2 3 2.54 45 see note 4.65 4.52 4.60 4.47 15.24 14.23 2.18 max dwg. mh-003d in 0.063 0.059 0.018 0.015 0.016 0.050 1 2 3 0.100 45 see note 0.183 0.178 0.181 0.176 0.600 0.560 0.086 max package designator u dimensions in inches (controlling dimensions) dimensions in millimeters (for reference only) devices in the u package are not recommended for new design 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.
3134 low-hysteresis bipolar hall-effect switch for high-temp. operation dwg. mh-014d in 0.164 0.159 0.062 0.058 0.015 0.050 bsc 45 0.640 0.600 0.016 0.085 max 45 0.031 123 0.122 0.117 see note package designator ua dimensions in inches (controlling dimensions) dimensions in millimeters (for reference only) dwg. mh-014d mm 4.17 4.04 1.57 1.47 0.38 1.27 bsc 45 16.26 15.24 0.41 2.16 max 45 0.79 123 3.10 2.97 see note 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 design of its products. 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. 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.
3134 low-hysteresis bipolar hall-effect switch for high-temp. operation 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 hall-effect sensors selection guide partial part avail. oper. characteristics at t a = +25 c number temp. b op(max) b rp(min) b hys(typ) featuresnotes hall-effect unipolar switches in order of b op and b hys 3240 e/l +50 +5.0 10 chopper stabilized 1 3210 e 70 5.0 7.7 micropower, chopper stabilized 3361 e +120 +50 5.0* 2-wire, chopper stabilized 3362 e +120 +50 5.0* 2-wire, chopper stabilized 3161 e +160 +30 20 2-wire 3141 e/l +160 +10 55 3235 s +175 +25 15* output 1 2 -25 -175 15* output 2 2 5140 e +200 +50 55 300 ma output 1, 3 3142 e/l +230 +75 55 3143 e/l +340 +165 55 3144 e/l +350 +50 55 3122 e/l +400 +140 105 3123 e/l +440 +180 105 3121 e/l +450 +125 105 3150 j +40 to +850 C 20 programmable, chopper stabilized 1 hall-effect latches & bipolar switches ? in order of b op and b hys 3260 e/l +30 -30 20 bipolar, chopper stabilized 3280 e/l +40 -40 45 chopper stabilized 3134 e/l +50 -50 27 bipolar switch 3133 k/l/s +75 -75 52 bipolar switch 3281 e/l +90 -90 100 chopper stabilized 3132 k/l/s +95 -95 52 bipolar switch 3187 e/l +150 -150 100* 3177 s +150 -150 200 3625 s +150 -150 200 900 ma outputs 1, 3, 5 3626 s +150 -150 200 400 ma outputs 1, 3, 5 3195 e/l +160 -160 220 1, 4 3197 l +160 -160 230 1 3175 s +170 -170 200 3188 e/l +180 -180 200* 3283 e/l +180 -180 300 chopper stabilized 3189 e/l +230 -230 100* 3275 s +250 -250 100* 5 3185 e/l +270 -270 340* operating temperature ranges: s = -20 c to +85 c, e = -40 c to +85 c, j = -40 c to +115 c, k = -40 c to +125 c, l = -40 c to +150 c notes 1. protected. 2. output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc motor control. 3. power driver output. 4. active pull down. 5. complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control. * minimum. ? latches will not switch on removal of magnetic field; bipolar switches may switch on removal of field but require field reversal for reliable operation over operating temperature range.
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