optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. hallogic hall-effect sensor assembly OHB3040, OHB3040 b & OHB3040s optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 323-2396 sensors@optekinc .com www. optekinc.com issue b 03/2014 page 1 of 3 features: ?? non-contact motion sensing ?? operates over a broad range of supply voltages (4.5 v to 25 v) ?? excellent temperature stability ?? hall element, linear amplifier and schmitt trigger on a single hallogic silicon chip ?? suitable for military and space applications. ?? performs in dirty environments over wide temperature range ?? 0.125? (3.18 mm) wide gap description: the OHB3040 consists of a ceramic hall-effect sensor (omh3040) and a rare earth magnet mounted in a low-cost plastic housing. the magnet produces optimum magnetic flux at the hall-effect sensor location. the sensor has an open collector transistor output, which is activated when the slot is open. when the sl ot is blocked by a ferrous material that reduces the magnetic fl ux density at the hall-effect sensor location, the open collector output transistor switches off. the device provides up to 25 ma of sink current. output char acteristics are constant at switching frequencies from dc to over 200 khz. the ohb3 040b has hi-reliability processing level b while the OHB3040s has hi-reliability processing level s. the uni-polar turns on with a (logic level ?0?) after a su fficient magnetic field from the south pole of a magnet approaches the symbolized face of the device (operating point) and turns off (logic level ?1?) after the magnetic field reached a minimum value. this feature makes thes e sensors ideal for applications in non-contact switching operations. product photo here hall element voltage regulator 2 3 1vcc output ground pin # description 1 vcc 2 ground 3 output applications: ?? non-contact slotted magnetic switch ?? harsh environment encoder ?? assembly line automation ?? machine automation ?? machine safety ?? end of travel sensor ?? door sensor dimensions are in: inches [millimeters] ordering information part number description OHB3040 OHB3040b OHB3040s slotted switch rohs
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. hallogic hall-effect sensor assembly OHB3040, OHB3040 b & OHB3040s optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 323-2396 sensors@optekinc .com www. optekinc.com issue b 03/2014 page 2 of 3 notes: (1) slot blocked with a ferrous ma terial to interrupt magnetic flux. (2) see hall-effect data sheet oh090 through ohs3100 se ries for additional information ? for reference only. electrical characteristics (v cc = 4.5 v to 24 v, t a = 25 c unless otherwise noted) (2) symbol parameter min typ max units test conditions i cc supply current - 4 7 ma v cc = 24 v, output off v ol output saturation voltage - 100 400 mv v cc = 4.5 v, i ol = 20 ma, slot open i oh output leakage current - 0.1 10 a v = 4.5 v, v out = 24 v, slot blocked (1) t r output rise time - 0.21 1 s r l = 820 ? , c l = 20 pf t f output fall time - 0.1 1 s r l = 820 ? , c l = 20 pf supply voltage, v cc 25 v storage temperature range, t s -50c to +160 c operating temper ature range, t a -40c to +125 c lead soldering temperature (1/8 in. (3.2 mm) from case for 5 sec. with soldering iron) 260 c output on current, i sink 25 ma output off voltage, v out 25 v magnetic flux density, b unlimited absolute maximum ratings (ta = 25 c unless otherwise noted) m s center line rop vane - material = 1018 cold rolled steel - 0.03" [0.76mm] thick location = 0.50" [1.27mm] from bottom of slot right right left left operate release release operate point point point point minimum 0.073" 0.045" -0.045" -0.073" [1,85mm] [1,14mm] [-1,14mm] [-1,85mm] maximum 0.003" -0.005" 0.005" -0.003" [0,08mm] [-1,27mm] [1.27mm] [-0,08mm] rrp lop lrp measurements are referenced to center line. u.u.t. 820 ohm 20 pf 3 2 1 vcc output ground v ol oh v 10% 90% tr tf 90% 10% b op rp b magnetic field -0.005? [-0.127mm] 0.005? [0.127mm] 0.50? [12.7mm]
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. hallogic hall-effect sensor assembly OHB3040, OHB3040 b & OHB3040s optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 323-2396 sensors@optekinc .com www. optekinc.com issue b 03/2014 page 3 of 3 rise & fall time vs temperature 0 50 100 150 200 250 300 350 -50 -25 0 25 50 75 100 125 150 temperature (c) typical time (ns) rise fall icc vs temperature 0 1 2 3 4 5 6 7 8 9 -50 -25 0 25 50 75 100 125 150 temperature (c) typical icc (ma) icc on icc off rise & fall vs temperature icc vs temperature saturation voltage vs temperature 0.1 0.15 0.2 0.25 0.3 0.35 0.4 -50 -25 0 25 50 75 100 125 150 temperature (c) typical saturation voltage (v) sat voltage saturation voltage vs temperature
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