The LH223 is a unipolar ha ll switch
designed in CMOS technology. The IC
internally includes a voltage regulator, Hall
sensor with dynamic offset cancellation
system, Schmitt trigger and an open-drain
output driver.
While the magnetic flux density(B) is larger
than operate point(Bop),the output will be
turned on(low),the output is held until the
magnetic flux density(B) is lower than
release point(Brp),then turn off.
It has wide operating voltage range and
extended choice of temperature range, it is
quite suitable for use in automotive,
industrial and consumer applications.

Features
z 25mA Output Sink Current
z Operating Temperature: −40~ +125℃
z
z Lead Free Package: SIP-3L and SC59
(Commonly known as TO-92S and SOT-23-3L in Asia)
z Lead Free Finish/RoHS Compliant
Application
z Rotor Position Sensing
z Current Switch
z Encoder
z RPM Detection
Unipolar Hall Switch - High Sensitivity
Rev. 1.1 Mar. 27,2011
Fig.1 Typical Application Circuit of LH1230.
RL
C
VDD
3.5~24V
GND
OUT
z
z CMOS Technology
z 3.5V to 24V DC Operation Voltage
z Proximity detection
High Magnetic Sensitivity:Bhyst=10Gauss(Typ.)

Chopper-stabilized amplifier stage

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