preliminary datasheet linear hall effect ic AH49F jun. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 1 general description the AH49F is a small, versatile linear hall-effect device that is operated by the magnetic field from a permanent magnet or an electromagnet. the output voltage is set by the supply voltage and varies in proportion to the strength of the magnetic field. the integrated circuitry f eatures low noise output, which makes it unnecessary to use external filtering components. it also includes precision resistors to provide increased temperat ure stability and accuracy. the operating temperature range of these linear hall sensors is -40c to 105c, appropriate for commercial, consumer, and industrial environments. the AH49F is available in standard to-92s and sot-23-3 packages. features ? miniature construction ? power consumption of 3.0ma at v cc =5v for energy efficiency ? single current sourcing output ? linear output for circuit design flexibility ? low noise output virtually eliminates the need ? for filtering ? a stable and accurate output ? temperature range: -40c to 105c ? responds to either positive or negative gauss ? the maximum instantaneous supply voltage ? up to 50v ? high esd rating: 6000v (human body model) 600v (machine model) application ? current sensing ? motor control ? position sensing ? magnetic code reading ? rotary encoder ? ferrous metal detector ? vibration sensing ? liquid level sensing ? weight sensing figure 1. package types of AH49F to-92s sot-23-3
preliminary datasheet linear hall effect ic AH49F jun. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 2 pin configuration z3 package n package (to-92s) (sot-23-3) (front view) (top view) figure 2. pin configuration of AH49F pin description pin number to-92s sot-23-3 pin name function 1 1 vcc power supply pin 2 3 gnd ground pin 3 2 out output pin 1 2 3 vcc gnd out 3 2 1 gnd vcc out
preliminary datasheet linear hall effect ic AH49F jun. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 3 functional block diagram figure 3. functional block diagram of AH49F ordering information AH49F - circuit type package z3: to-92s n: sot-23-3 part number marking id package temperature range lead free green lead free green packing type to-92s AH49Fz3-e1 AH49Fz3-g1 49fe 49fg bulk sot-23-3 -40 to 105 c AH49Fntr-g1 gt6 tape & reel bcd semiconductor's pb-free products, as designated with "g1" suffix in the part number, are rohs compliant and green. blank: bulk tr: tape & reel e1: lead free g 1: green
preliminary datasheet linear hall effect ic AH49F jun. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 4 absolute maximum ratings (note 1) parameter symbol value unit supply voltage v cc 10 v instantaneous supply voltage v cc_inst 50 v to-92s 400 power dissipation sot-23-3 p d 230 mw ambient temperature t a -40 to 125 c storage temperature t stg -50 to 150 c esd (human body model) 6000 v esd (machine model) 600 v note 1: stresses greater than those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ?recommended operating co nditions? is not implied. exposure to ?absolute maximum ratings? for extended periods may affect device reliability. recommended operating conditions (t a =25 c) parameter symbol min max unit supply voltage v cc 3 8 v operating temperature t op -40 105 c
preliminary datasheet linear hall effect ic AH49F jun. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 5 electrical characteristics v cc =5v, t a =25c, unless otherwise specified. parameter symbol conditions min typ max unit supply current i cc 2 3 4 ma quiescent output voltage v null b=0 (gauss) 2.25 2.5 2.75 v output voltage sensitivity v sen b=0 to 600 (gauss) 1.7 2.1 2.5 mv/gauss output voltage span v out_s 1.0 to (v cc -1.0) 0.8 to (vcc-0.8) v output resistor r out 60 120 linear magnetic range b 500 800 gauss linearity of span 0.7 % output noise bandwidth=10hz to 10khz 90 v transferring characteristics (v cc =5v) when there is no outside magnetic field (b=0gauss), the quiescent output voltage is one-half the supply voltage in general. for to-92s package, if a south magnetic pole approaches the front face (t he side with marking id) of the hall effect sensor, the circuit will drive the output voltage higher. in contrary, a north magnetic pole will drive the output voltage lower. the variations of voltage level up or down are symmetrical. because the sot-23-3 is reversed packaging with to-92s, so the magnetic performance is also reversed. therefore, if the reversed magnetic pole appr oaches the front face, the output is the same as to-92s package. greatest magnetic sensitivity is obtained with a supply voltage of 8v, but at the cost of increased supply current and a slight loss of output symmetry. so, it is not recommended to work in such condition unless the output voltage magnitude is a main issue. the output signal can be capacitively coupled to a next-level amplifier for further amplifying if the changing frequency of the magnetic field is high. figure 4. transferring characteristic of AH49F for to-92s for sot-23-3 figure 5. magnetic characteristic of AH49F south pole north pole 800 -800 400 -400 0 1.0v 2.5v 4.0v typical output voltage v b (gauss)
preliminary datasheet linear hall effect ic AH49F jun. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 6 typical performance characteristics figure 6. supply current vs. supply voltage figure 7. output voltage vs. magnetic field figure 8. output voltage vs. supply voltage figure 9. output voltage vs. ambient temperature 2345678 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 i cc (v) v cc (v) b=0gauss no load -1500 -1000 -500 0 500 1000 1500 0 1 2 3 4 5 v out (v) b (gauss) v cc =5v no load 2345678 0 1 2 3 4 5 b=0gauss no load v out (v) v cc (v) -40 0 40 80 120 0 1 2 3 4 5 v cc =5v b=0gauss no load v out (v) t a ( o c)
preliminary datasheet linear hall effect ic AH49F jun. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 7 0 255075100125150 0 50 100 150 200 250 300 350 400 450 p d (mw) t a ( o c) sot-23-3 to-92s typical performance characteristics (continued) figure 10. power dissipation vs. ambient temperature
preliminary datasheet linear hall effect ic AH49F jun. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 8 mechanical dimensions to-92s unit: mm(inch) package sensor location 1.480(0.058) 1.680(0.066) 0.710(0.028) 0.810(0.032) 3.080(0.121) 3.280(0.129) 2.200(0.087) 2.400(0.094) 0.440(0.017) typ 13.500(0.531) 14.500(0.571) 0.380(0.015) typ 1.270(0.050) typ 44 46 4.000(0.157) 4.200(0.165) 1.900(0.075) 2.200(0.087) 1.150(0.045) 1.450(0.057)
preliminary datasheet linear hall effect ic AH49F jun. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 9 mechanical dimensions (continued) sot-23-3 unit: mm(inch) 2.820(0.111) 3.020(0.119) 2.650(0.104) 2.950(0.116) 0.950(0.037) typ 0.300(0.012) 0.500(0.020) 1.500(0.059) 1.700(0.067) 1.800(0.071) 2.000(0.079) 0.300(0.012) 0.600(0.024) 0.100(0.004) 0.200(0.008) 0.000(0.000) 0.150(0.006) 0.900(0.035) 1.300(0.051) 1.450(0.057) max. 0.200(0.008) 0 8 0.670(0.026) 0.970(0.038) 1.300(0.051) 1.600(0.063) (for hall ic) package sensor location
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