oh49 oh49 oh49 oh49 f f f f linear hall-effect ic nanjing nanjing nanjing nanjing ouzhuo ouzhuo ouzhuo ouzhuo technology technology technology technology co., co., co., co., ltd ltd ltd ltd www.ohhall.com www.zbling.com tel 86- 25-52312738 86-25- 83247886 fax: 86-25-52312738 e-mail: ohhall@163.com page 1 order order order order information information information information pn pn pn pn oh49 f operating operating operating operating temperature temperature temperature temperature -40 10 5 package package package package to-92 s 1000pcs/bag general general general general description description description description the o h49 f is a small, versatile linear hall-effectdevice 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 features low noise output, which makes it unnecessary to use external filtering. it also includes precision resistors to provide increased temperature stability and accuracy. the operating temperature range of these linear hall sensors is -40 to 10 5 , appropriate for commercial, consumer and industrial applications. features features features features miniature construction power consumption of 3ma at vcc=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 of -40 to 10 5 responds to either positive or negative gauss the maximum instantaneous supply voltage up to 50v high esd rating: human body model: 6000v, machine model: 600v typical typical typical typical applications applications applications applications current sensing motor control position sensing magnetic code reading ferrous metal detector vibration sensing liquid level sensing weight sensing functional functional functional functional block block block block diagram diagram diagram diagram
oh49 oh49 oh49 oh49 f f f f linear hall-effect ic nanjing nanjing nanjing nanjing ouzhuo ouzhuo ouzhuo ouzhuo technology technology technology technology co., co., co., co., ltd ltd ltd ltd www.ohhall.com www.zbling.com tel 86- 25-52312738 86-25- 83247886 fax: 86-25-52312738 e-mail: ohhall@163.com page 2 absolute absolute absolute absolute maximum maximum maximum maximum rating rating rating rating supply voltage v cc 10 v instantaneous supply voltage v cc _inst . 5 0 v operating temperature range t a -40 1 25 storage temperature range t s -50 150 esd (human body model) 6 000v esd(machine model) 600v note: 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 conditions" is not implied. exposure to "absolute maximum ratings" for extendedperiods may affect device reliability. recommended recommended recommended recommended operating operating operating operating conditions conditions conditions conditions supply voltage v cc 3- 8 v operating temperature range t a -40 10 5 electrical electrical electrical electrical & & & & magnetic magnetic magnetic magnetic characteristics characteristics characteristics characteristics ( t a =25 ,vcc=5.0v ) parameter symbol conditions min typ max unit supply current icc 2 3 4 ma quiescent output voltage v null @ b=0gs 2.25 2.5 2.75 v output voltage sensitivity s b=0gs to 6 00gs 1 .7 2.1 2. 5 mv/gs output voltage span v os 1.0 to (vcc-1.0) 0.8 to (vcc-0.8) v output resistor r o 60 120 magnetic field range b 50 0 8 00 gs linearity of span 0.7 % output noise bw=10hz to 10khz 90 v
oh49 oh49 oh49 oh49 f f f f linear hall-effect ic nanjing nanjing nanjing nanjing ouzhuo ouzhuo ouzhuo ouzhuo technology technology technology technology co., co., co., co., ltd ltd ltd ltd www.ohhall.com www.zbling.com tel 86- 25-52312738 86-25- 83247886 fax: 86-25-52312738 e-mail: ohhall@163.com page 3 transfer transfer transfer transfer characteristics characteristics characteristics characteristics (vcc=5v) when there is no ouside magnetic field (b=0gs), the quiescent output voltage is one-half the supply voltage in general. if a south magnetic pole approches to the front face (the side with marking id) of the halleffect sensor, the circuit will drive the output voltage higher. contrary, a north magnetic pole will drive the output voltage lower. the variations of voltage level up or down are symmetrical. greatest magnetic sensitivity is obtained with a supply voltage of 6v, 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 an amplifier for boosting further if the changing frequency of the magnetic field is high. package package package package (unit (unit (unit (unit :mm) :mm) :mm) :mm) pin pin pin pin description description description description 1 vcc 2 gnd 3 output
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