6120 hanging moss road ? orlando, florida 32807 ? www.fwbell.com phone (407) 678-6900 ? fax (407) 677-5765 ? toll free (800) 778-6117 6 bulk indium arsenide bh-700 series single axis description designed to meet the requirements of a wide range of magnetic field measurement applications, the bh-700 series are small, solid-state devices that provide an output voltage proportional to the product of control current and ambient flux density. five single-axis models are available to measure axial and transverse magnetic field electrical specifications bh-702 a. air gap: between concentrator and substrate, 0.0025" nominal and 0.003" maximum. b. sensitivity: basic sensitivity of hall element .15 v/a-kg min. with the unit suspended in a free field of 100 oersteds and i c =200 ma, the open circuit hall voltage is 8.0 mv min. in a closed magnetic circuit with i c =200 ma, v h is 3.2mv/ampere turn min. c. polarity: with the magnetic field vector as shown and i c entering the red lead, the positive hall voltage will appear at the blue lead. bh-701 a. linearity: v h vs. b, 10 to +10 kg: 0.25% of reading, max. bh-704 v h vs. b, 30 to +30 kg: 1.0% of reading, max. v h vs. i c , 0 to 100 ma: 0.1% of reading, max. v h vs. i c , 0 to 300 ma: 1.0% of reading, max. b. encapsulation: the bh-701 and the bh-704 are encapsulated in a rugged aluminum oxide ceramic and epoxy case for excellent heat transfer and strength. mechanical specifications a. color code: control current (l c ): red (+ l c ) black (- l c ) hall voltage (v h ): blue (+v h ) yellow (- v h ) b. polarity: with the magnetic field vector (+b) entering the top of the hall plate and l c entering the red lead, the positive hall voltage will appear at the blue lead. models bh-700 low cost, transverse, general purpose bh-701 rugged, high-linearity, transverse, instrumentation quality bh-702 low field (ferrite-embedded), transverse bh-704 rugged, high linearity, axial, instrumentation quality BH-705 general purpose, transverse specifications units bh-700 bh-701 bh-702 bh-704 BH-705 input resistance, r in ohms 5.5 max. 2 max. 3.5 max. 2.5 max. 2.2 max. output resistance, r out ohms 5.5 max. 2 max. 3.5 max. 2.5 max. 2 max. open circuit magnetic sensitivity, v hoc (1) mv/kg 50 min. 7.5?0% (3) *** 7.5?0% 10?5% max. resistive residual voltage, v m @ b=0 (1) v 1500 max. 75 max. 250 max. 75 max. 300 max. max. control current @25?, static air ma 250 300 300 300 250 nominal control current ma 200 100 200 100 100 max. linearity error, (0 to 10 kg) with r lin ? of rdg 3 zero field thermal voltage v ? 5 max. ? 5 max. 5 max. mean temperature coefficient of v h (-20? to +80?) (2)* %/? - 0.2 - 0.04 - 0.18 - 0.04 - 0.08 mean temperature coefficient of resistance (-20? to +80?) (2)* %/? +0.2 +0.18 +0.18 +0.18 +0.2 temperature dependence of resistive residual voltage (-20? to +80?) (2)* v/? 6 typical 0.3 typical 2.5 typical 0.5 max. 1 max. operating temperature range ? - 40? to +100? - 40? to +100? - 55? to +100? - 40? to +100? - 65? to +100? storage temperature range ? - 40? to +105? - 40? to +105? - 55? to +105? - 40? to +105? - 65? to +105? notes (1) i c =i cn (2) i c =100 ma (3) loaded sensitivity *approximate 1 rev. date 03/2006 hall sensors components with sensitivities from 7.5 to 50mv/kg and input and output resistance of several ohms.
black yellow blue red red blue yellow black 6120 hanging moss road ? orlando, florida 32807 ? www.fwbell.com phone (407) 678-6900 ? fax (407) 677-5765 ? toll free (800) 778-6117 10 kg linearity bh-701 bh-704 optimum loading -10 -8 -6 -4 -2 0.0 2 4 6 8 10 1 4 % + 1 4 % + 1 4 % - 1 4 % - magnetic field strength in kg note: +1 % +1 % -1% -1% magnetic field strength in kg note: bh-701 bh-704 30 kg linearity typical error in % of output optimum loading 0.250" dia. 6.35mm 0.79mm active area (approx.) 0.031" dia. 0.200" 5.08mm 0.106" 2.69mm 0.200" dia. 5.08mm 10" 254mm model bh-704 high linearity axial + b + 0.043" max. 1.09mm 0.235" 5.97mm 0.180" 0.625" 4.57mm 15.88mm 10" 254mm active area approx. 0.070" dia. (1.78mm) model bh-701 high linerarity transverse 0.200" 5.08mm 0.125" 3.18mm 0.020" 0.51mm 0.032" 0.81mm 0.265" 0.73mm 10" 254mm hall plate 0.060" x 0.120" 1.52mm x 3.05mm 0.020" max. 0.51mm 0.023" max. 0.58mm model BH-705 general purpose transverse + b 0.200" 5.08mm + b 0.100" 2.54mm 0.075" 1.91mm 0.050" 1.27mm 0.200" 5.08mm ferrite concentrator 7.5 " 190.5mm 0.082" 0.003" 2.08mm 0.08mm model bh-702 ferrite imbedded transverse hall plate 0.180" x 0.080" 4.57mm x 2.03mm 7.5 " 190.5mm 0.200" 5.08mm 0.250" 6.35mm 0.025" 0.64mm model bh-700 low cost transverse 0.035" 0.89mm 0.156" 3.96mm 0.023" max. 0.58mm 0.028" max. 0.71mm + b notes all tolerances unless specified are .010 rev. date 03/2006 hal l sensors ??????????? dimensions ??????????????????????????????????????????
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