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 devices in the u package are last-time buy orders accepted only until april 18, 2002
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 -40 8.5 50 g over oper. temp. range -40 C 50 g release point b rp at t a = +25 c -50 -19 40 g 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, 2002 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 www.allegromicro.com typical operating characteristics 0 25 50 75 100 ambient temperature in ? -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 dwg. mh-011-4c 0.0195" 0.50 mm nom branded surface active area depth 0.083" 2.10 mm 0.060" 1.51 mm a suffix u 1 3 2 dwg. mh-002-7c 0.0165" 0.42 mm nom branded surface a ctive area depth 0.077" 1.96 mm 0.092" 2.33 mm a suffix lt 1 3 2 dwg. mh-008-4c 0.0305" 0.775 mm nom active area depth 0.050" 1.27 mm 0.090" 2.27 mm a 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 responsibility for its use; nor for any infringe- ments of patents or other rights of third parties that may result from its use.
3134 low-hysteresis bipolar hall-effect switch for high-temp. operation www.allegromicro.com dimensions in millimeters (controlling dimensions) 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 package designator lt (sot-89/to-243aa) dimensions in inches (for reference only) 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 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-003e mm 1.60 1.50 0.46 0.44 0.35 0.48 0.36 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-003e in 0.063 0.059 0.018 0.0173 0.0138 0.0189 0.0142 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) 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. devices in the u package are last-time buy orders accepted only until april 18, 2002
3134 low-hysteresis bipolar hall-effect switch for high-temp. operation www.allegromicro.com 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 package designator ua dimensions in inches (controlling dimensions) dimensions in millimeters (for reference only) 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 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 bipolar hall-effect digital switches partial operate release hysteresis replaces part point (g) point (g) (g) oper. and number over oper. voltage & temp. range temp. packages 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 a3260x <30 (typ 10) >-30 (typ -10) typ 20 e, l lh, lt, ua 2 wire, chopper stabilized latching hall-effect digital switches partial operate release hysteresis replaces part point (g) point (g) (g) oper. and number over oper. voltage & temp. range temp. packages comments ugn3175 15 to 180 -180 to -15 >80 (typ 180) s lt, ua ugn3177 25 to 150 -150 to -25 >50 (typ 180) s lt, ua a3185x 140 to 300 -300 to -140 280 to 600 e/l lt, ua a3187x 50 to 175 -175 to -50 100 to 350 e/l lt, ua 3077, 3175, 3177 a3188x 80 to 200 -200 to -80 160 to 400 e/l lt, ua a3189x 50 to 250 -250 to -50 100 to 500 e/l lt, ua 3075, 3076 a3280x 5 to 40 -40 to -5 10 to 80 e/l lh, lt, ua chopper stabilized a3281x 15 to 90 -90 to -15 30 to 180 e/l lh, lt, ua chopper stabilized a3283x 100 to 180 -180 to -100 <400 (typ 300) e/l lh, lt, ua chopper stabilized protected latching hall-effect digital switches partial operate release hysteresis part point (g) point (g) (g) oper. number over oper. voltage & temp. range temp. packages comments a3195x 40 to 200 -200 to -40 >110 (typ 220) e, l u, lt active pulldown a3197x 40 to 200 -200 to -40 >110 (typ 230) e, l u, lt open-collector output 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.
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