AS1890B
Omnipolar Detection High
Performance Low Power
Hall-Effect Sensor IC
General Description
Using low power CMOS process, the AS1890B 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.
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
OPS
=±30Gauss, B
RPS
=±20Gauss
Good RF noise immunity
No need pull-up resistor
Small Solution Size
RoHS & Green Compliant
DFN1216-4L Package
-40℃ to +85 ℃ Temperature Range
Applications
Cover switch in clam-shell cellular phones
Cover switch in Notebook, PC/PAD
Contact-less switch in consumer products
Solid State Switch
Handheld Wireless Handset Awake Switch
Lid close sensor for battery-powered devise
Magnet proximity sensor for reed switch
replacement in low duty cycle applications
DV, DSC, and White Goods
