ANGSEMI Microelectronics Co., Ltd. All rights reserved. 15, Jun. 2016
General Description
Using low power CMOS process, the AS1801 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 AS1801 is
typically less than 1.8uA at 1.8V power supply. AS1801
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 SOT23-3L, SOT553,
DFN1216-4L and SIP-3L Package and is rated over the
-40°C to 85°C. The all packages are RoHS and Green
compliant.
Features
Input Voltage Range : 1.65V 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
SOT23-3L, SOT553, DFN1216-4L & SIP-3L
Packages
-40℃ to +85 ℃ Temperature Range
Applications
Smart Meter
Cover switch
Contact-less switch