General Description
Using CMOS process, the AS1894AOD 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. AS1894AOD 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=±32Gauss, BRP=±28Gauss
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