optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. ratiometric linear hall-effect sensor omh3150, OMH3150B, omh3150s optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue a.2 05/09 page 1 of 4 description: each ratiometric linear hall-effect sensor contains a mono lithic integrated circuit on a single chip. this circuit incorporates a quadratic hall sensing element, which mini mizes the effects of mechanical and thermal stress on the hall element and temperature compensating circuitry to compensate for the inherent hall element sensitivity change over temperature current. these ratiometric linear hall-effect sensors provide an out put voltage that varies in proportion to the applied magnetic field. the voltage output will increase in resp onse to a south pole (positive) magnetic field applied perpendicular to the package symbolization face, and will decrease in response to a north pole (negative) magnetic field. these 3150 ratiometric linear hall-effect sensors can be used as a non-contact sensor for rotary and linear position sensing and for current sensing. product photo here applications: ? non-contact magnetic sensing ? assembly line automation ? machine automation ? machine safety ? door sensor ? where sensing is required in dirty environments 2 3 1vcc output gnd vcc dual to single converter qual hall element voltage regulator ordering information omh3150 -40c to +125c v oq change over t a = 50 gauss sensitivity=3.50 mv/g & t a = 25oc OMH3150B omh3150s ceramic package features: ? ratiometric linear output capable of sinking and sourcing current ? designed for non-contact switching operations ? operates over a broad range of supply voltages ? excellent temperature stability operates in harsh environments ? suitable for military and space applications ? processing patterned after class b or s of mil-std-883 lead information: base material = kovar plating = 80 inches ag over 50-300 inches ni ?s? version only = solder dip 63 %(sn) - 37 %(pb)
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. ratiometric linear hall-effect sensor omh3150, OMH3150B, omh3150s optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue a.2 05/09 page 2 of 4 note: (1) negative current is defined a coming out of (sourcing) the output. (2) see characteristics definitions for test conditions and ca lculation formulas. supply voltage, v cc 6 v storage temperature range, t s -65c to +150 c operating temper ature range, t a -40c to +125 c lead soldering temperature (1/8 inch [3.2 mm] from case for 5 seconds with soldering iron) 260 c (1) power dissipation, p d 100 mw output current, i o 5 ma magnetic flux density, b unlimited absolute maximum ratings symbol parameter min typ max units test conditions v cc supply voltage 4.5 5.0 6.00 v i cc supply current 5.5 10.00 ma vcc = 6 v, i o = 0 ma, b = og v oq quiescent voltage output 2.25 2.5 2.75 v b = og, t a = 25 c 2.10 2.5 2.90 v b = og, t a = -40c to +125c i o sink current 0.5 ma i o source current -1.0 ma electrical characteristics (over operating temperature range at v cc = 5 v, unless otherwise noted) symbol parameter omh3150 units min typ max t a operating temperature range -40 - 125 c sens sensitivity @ t a = 25 c 3.00 3.50 4.10 mv/g ? sens( ? t) sens change @ t a > 25 c @ t a < 25 c -5 -12 - - 10 3.0 % % ? v oq ( ? t) v oq change over t a - - 50 g ? sens( ? v) ratiometric sense change - 100 - % ? v oq ( ? v) ratiometric v oq change - 100 - % +lin positive lin 25 < 25 80 90 - - 105 110 % -lin negative lin 25 < 25 80 90 - - 105 110 % sym output symmetry 80 100 110 %
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. ratiometric linear hall-effect sensor omh3150, OMH3150B, omh3150s optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue a.2 05/09 page 3 of 4 characteristics definitions quiescent voltage output: with no magnetic field present the devic e in the quiescent state and the voltage output is approximately equal to one-half the supply voltage (v oq = v cc / 2) over the operating voltage and temperature r ange. the change in quiescent voltage output over temperature give s the device?s equivalent accuracy and is specified in gauss by the calculation. v oq (ta) - v oq (25c) v oq (t) = ????????- sens (25c) sensitivity: a magnetic south pole at, and perpendicula r to, the device?s symbolized package face will increase the voltage output abov e the quiescent value. conversely a magnetic north pole will decrease the volt age output below the quiescent value. this change in voltage output with applied magnetic field is sensitivity and is specified in mv/g by the calculation. vo (+500g) - v o (-500g) sens = ????????????? 1000 the change is sensitivity over temper ature is specified in percent by the calculation sens (ta) - sens (25c) sens ( t) = ???????????- x 100% sens (25c) ratiometry: the quiescent voltage output and sensitivity of these ratiometric linear hall-effect devices are proportional to the supply voltage. the change in quiescent voltage output with supply voltage is specif ied in percent by the calculation v o (vcc) - v o (5v) v oq ( v) = ?????????? x 100% v cc / 5 v this change in sensitivity with supply vo ltage is also specified in percent by the calculation v oq (vcc) / v oq (5v) sens ( v) = ?????????? x 100% v cc / 5 v linearity & symmetry: the ability of the voltage output to vary in constant proportion to the applied magnetic field is linearity and is specified in percent by the calculation v o (+500g) - v oq + linearity = ?????????? x 100% 2(v o (250g) -v oq ) v o (-500g) - v oq - linearity = ?????????? x 100% 2(v o (-250g) -v oq ) the output is also specified in percent by the calculation v o (500g) - v oq - linearity = ?????????? x 100% v oq -v oq (-500g)
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. ratiometric linear hall-effect sensor omh3150, OMH3150B, omh3150s optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue a.2 05/09 page 4 of 4 icc vs temperature 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 -60 -40 -20 0 20 40 60 80 100 120 140 160 temperature (c) typical icc (ma) output vs gauss -1000 -800 -600 -400 -200 0 200 400 600 800 1000 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 typical output (volts) typical gauss
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