General Description

Using low power CMOS process, the AS1831H is
designed for high performance omnipolar high speed
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 AS1831H is
typically less than 1.0mA at 3.6V power supply. AS1831H 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 DFN1014-4L Package
and is rated over the -40°C to 125°C. The all packages
are RoHS and Green compliant.

Features

 Input Voltage Range : 2.2V to 5.5V
 Operation Frequency: 20KHz(min)
 Omnipolar Operation, easy to use as output
 Very high sensitivity hall sensor
 Low Power CMOS process technology
 Chopper stabilization amplifier stage
 Magnetic Sensitivity (typical)
BOP=±18Gauss, BRP=±10Gauss
 Good RF noise immunity
 No need pull-up resistor
 Small Solution Size
 RoHS & Green Compliant
 DFN1014-4L Package
 -40℃ to +125 ℃ Temperature Range

Applications

 Cell phones, laptops, or tablet case sensing
 Electricity meter tamper detection
 E-locks • Smoke detectors
 Home appliance open/close detection
 Medical devices
 IoT systems
 Valve and solenoid position detection
 Contactless diagnostics or activation