General DeSCRJPTion:
Part No. OH37
Operate temperature: -40～85℃
Package:3000pcs/reel
Features
? 4.5V to 24V DC operation
voltage
? Open-Collector pre-driver
? 25mA maximum sinking output
current.
? Reverse Polarity Protection
Applications
? Speed measurement
? Home appliances
? POSTTTION detection
? Flow measurement
Absolute Maximum Ratings （TA=25℃）
Supply Voltage VCC··············4.5-24V Operating Temperature Range TA ···········-40～85℃
Output
Current IO···················25mA Storage Temperature RangeTS ················-55～150℃
Precautions of OH Series
Hall ICS
Hall
ICs are sensitive devices which performance could be influenced in some extent
by magnetic, optical, thermal and mechanical stress.
1) A pull-up resistor RL should be connected
between the power supply (Vcc) and the output (Vout) since most of hall ICs are
open collector output (OC output) circuits, such as OH44E, OH137, OH513, OH543.
Hall ICs with Build-in Resistor are not necessary to add one, for example
OH921.
2) Avoid reversing the power supply (Vcc) and
the output (Vout) as well as no overload use. Be careful of the burn and damage
caused by instant large current and instantaneous high voltage.
3) The Protection circuit should be added in the
test circuits of hall ICs, such as large capacitor and a voltage stabilizing
diode, which could absorb the effects of the external circuit and power
fluctuation.
4)
Try to minimize the mechanical stress
applied to the device and leads during the installation, especially on the pins
where close to the root of the device when bending shaping etc.
5)
Strictly regulate the welding
temperature and time. When manual welding, the temperature of soldering iron
shall not exceed 260℃and time should be less than 3 seconds.
6)
When designing, please fully consider
the influence factors of temperature, magnetic field attenuation, the movement
way, etc.
OH37 Unipolar Hall Effect Switch IC
OH37 Hall switch
IC is internally consisted by reverse voltage protection device,
voltage regulator, hall voltage generator, a differential amplifier, Schmitt
trigger and the open collector output level, which can change magnetic
field signal into digital voltage output. OH37, with the feature
of small size (SOT23 package) and stable performance in -40～85℃, have been widely used in
various fields as a non-contact switch IC.
