General Description
Using low power CMOS process, the AS1800 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 AS1800 is
typically less than 2.5uA at 2.8V power supply. AS1800
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 TSOT23-3L&SIP-3L
Package is rated over the -40°C to 85°C.
Features
Input Voltage Range: 1.65V to 5.5V
Micro-power consumption ideal for battery
power applications
Omnipolar Operation, easy to use as output
Sensitivity hall sensor
Low Power CMOS process technology
Chopper stabilization amplifier stage
Magnetic Sensitivity (typical)
B
OP
=±30Gauss, B
RP
=±20Gauss
Good RF noise immunity
RoHS & Green Compliant
TSOT23-3L &SIP-3L Packages
-40℃ to +85 ℃ Temperature Range
Applications
Smart Meter
Cover switch
Contact-less switch