General Description
Using CMOS process, the AS1894OD is designed
for high performance omnipolar detection hall-effect
application, such as cover switch, contactless switch, solid state switch and lid close sensor etc battery
operation. The hall IC integrated an on-chip hall
voltage generator for magnetic sensing, a comparator
that amplifiers the hall voltage, a Chopper amplifier, a
Schmitt trigger to provide switching hysteresis for noise
rejection, and a complementary output. AS1894OD is designed to respond to alternating
North and South poles. When 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 (high). The device is available in SOT23-3L & SIP-3L
Package and is rated over the -40°C to 125°C. The all
packages are RoHS and Green compliant.
Features
Input Voltage Range : 2.5V to 5.5V Micro-power consumption ideal for batterypower applications
Omnipolar Operation, easy to useasoutput
Very high sensitivity hall sensor
CMOS process technology
Chopper stabilization amplifier stage Magnetic Sensitivity (typical)
BOP=±35Gauss, BRP=±32Gauss
Good RF noise immunity
OD Output (need pull-up resistor)
Small Solution Size
RoHS & Green Compliant
SOT23-3L & SIP-3L Packages
-40℃ to +125 ℃Temperature Range
Applications
Smart Meter
Cover switch
Contact-less switch