Ratiometric Linear Hall-effect Sensor OMH3150, 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 Product Photo Here Description: Each ratiometric linear Hall-effect sensor contains a monolithic integrated circuit on a single chip. This circuit incorporates a quadratic Hall sensing element, which minimizes 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 output voltage that varies in proportion to the applied magnetic field. The voltage output will increase in response 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. Applications: Ordering Information • OMH3150 OMH3150B VOQ Change over TA = ±50 Gauss Sensitivity=3.50 mV/G & TA = 25ºC -40°C to +125°C OMH3150S • • Non-contact magnetic sensing Assembly lIne automation • • • Machine safety Door sensor Where sensing is required in dirty environments Machine automation 1 Vcc Voltage Regulator Qual Hall Element Dual to Single Converter Vcc 3 Output 2 Gnd Lead Information: Base Material = Kovar Plating = 80 µ inches Ag over 50-300 µ inches Ni “S” version only = Solder dip 63 %(SN) - 37 %(pb) OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible. OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 [email protected] www.optekinc.com Issue A.2 05/09 Page 1 of 4 Ratiometric Linear Hall-effect Sensor OMH3150, OMH3150B, OMH3150S Absolute Maximum Ratings Supply Voltage, VCC 6V Storage Temperature Range, TS -65°C to +150° C Operating Temperature Range, TA -40°C 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, PD 100 mW 5 mA Output Current, IO Magnetic Flux Density, B Unlimited Electrical Characteristics (Over Operating Temperature Range at VCC = 5 V, unless otherwise noted) SYMBOL PARAMETER VCC Supply Voltage ICC Supply Current Quiescent Voltage Output VOQ MIN TYP MAX UNITS 4.5 5.0 6.00 V 5.5 10.00 mA 2.25 2.5 2.75 V B = OG, TA = 25° C 2.10 2.5 2.90 V B = OG, TA = -40°C to +125°C IO Sink Current 0.5 mA IO Source Current -1.0 mA TEST CONDITIONS Vcc = 6 V, IO = 0 mA, B = OG OMH3150 SYMBOL PARAMETER UNITS MIN TYP MAX Operating Temperature Range -40 - 125 Sens Sensitivity @ TA = 25° C 3.00 3.50 4.10 ∆Sens(∆T) Sens Change @ TA > 25° C @ TA < 25° C -5 -12 - 10 3.0 % % ∆VOQ(∆T) VOQ Change over TA - - ±50 G Ratiometric Sense Change - 100 - % Ratiometric VOQ Change - 100 - % TA ∆Sens(∆V) ∆VOQ(∆V) °C mV/G +Lin Positive Lin ≥ 25 < 25 80 90 - 105 110 % -Lin Negative Lin ≥ 25 < 25 80 90 - 105 110 % Sym Output Symmetry 80 100 110 % Note: (1) Negative current is defined a coming out of (sourcing) the output. (2) See characteristics definitions for test conditions and calculation formulas. OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible. Issue A.2 05/09 Page 2 of 4 OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 [email protected] www.optekinc.com Ratiometric Linear Hall-effect Sensor OMH3150, OMH3150B, OMH3150S Characteristics Definitions Quiescent voltage Output: With no magnetic field present the device in the quiescent state and the voltage output is approximately equal to one-half the supply voltage (VOQ = VCC / 2) over the operating voltage and temperature range. The change in quiescent voltage output over temperature gives the device’s equivalent accuracy and is specified in gauss by the calculation. VOQ (TA) - VOQ (25°C) ΔVOQ (T) = ————————Sens (25°C) Sensitivity: A magnetic south pole at, and perpendicular to, the device’s symbolized package face will increase the voltage output above the quiescent value. Conversely a magnetic north pole will decrease the voltage 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) - VO (-500G) Sens = ————————————— 1000 The change is sensitivity over temperature is specified in percent by the calculation Sens (TA) - Sens (25°C) ΔSens (ΔT) = ———————————X 100% Sens (25°C) 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 specified in percent by the calculation VO (VCC) - VO (5V) ΔVOQ (ΔV) = —————————— X 100% VCC / 5 V This change in sensitivity with supply voltage is also specified in percent by the calculation VOQ (VCC) / VOQ (5V) ΔSens (ΔV) = —————————— X 100% VCC / 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 VO (+500G) - VOQ + Linearity = —————————— X 100% 2(VO (250G) -VOQ) - Linearity = VO (-500G) - VOQ —————————— 2(VO (-250G) -VOQ) X 100% The output is also specified in percent by the calculation VO (500G) - VOQ —————————— X 100% - Linearity = VOQ -VOQ (-500G) OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible. OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 [email protected] www.optekinc.com Issue A.2 05/09 Page 3 of 4 Ratiometric Linear Hall-effect Sensor OMH3150, OMH3150B, OMH3150S Output vs Gauss 1000 800 600 Typical Gauss 400 200 0 -200 -400 -600 -800 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -1000 Typical Output (Volts) Icc vs Temperature 8.0 7.0 Typical Icc (mA) 6.0 5.0 4.0 3.0 2.0 1.0 0.0 -60 -40 -20 0 20 40 60 80 100 120 140 160 Temperature (°C) OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible. Issue A.2 05/09 Page 4 of 4 OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006 Phone: (972) 323-2200 or (800) 341-4747 FAX: (972) 323-2396 [email protected] www.optekinc.com