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 1.5uA at 1.8V power supply. AS1800
is designed to respond to alternating North and South 
poles. When the magnetic flux density (B) is larger than 
operate point (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 SOT553 Packageand is 
rated over the -40°C to 85°C. The all packages are 
RoHS and Green compliant.

Features

 Input VoltageRange: 1.65V to 3.65V
 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)
BOPS=±30Gauss, BRPS=±20Gauss
 Good RF noise immunity
 No need pull-up resistor
 Small Solution Size
 RoHS & Green Compliant
 SOT553 Package
 -40℃ to +85 ℃ Temperature Range