AS1890MBY
Omnipolar Detection High
Performance Low Power
Hall-Effect Sensor IC
General Description
Using low power CMOS process, the AS1890 is
designed for low power, 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.
The total power consumption of AS1890 is
typically less than 2.5uA at 2.8V power supply. AS1890
is designed to respond to alternating North and South
poles. When the magnetic flux density (B) is larger than
operate point (B
OP
), the output will be turned on (low),
the output is held until the magnetic flux density (B) is
lower than release point (B
RP
), then turn off (high).
The device is available in 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 : 2.0V to 5.0V
Micro-power consumption ideal for battery
power applications
Omnipolar Operation, easy to use as output
Very high sensitivity hall sensor
Low Power CMOS process technology
Chopper stabilization amplifier stage
Magnetic Sensitivity (typical)
B
OP
=±40Gauss, B
RP
=±23Gauss
Good RF noise immunity
No need pull-up resistor
Small Solution Size
RoHS & Green Compliant
SIP-3L Packages
-40℃ to +125 ℃ Temperature Range
Applications
Smart Meter
Cover switch
Contact-less switch
