General Description

Using low power CMOS process, the AS1691N is
designed for low power, high performance latch
detection hall-effect application, such as automotive,
industrial, electric tools, home appliances, brushless
DC motor etc, 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 AS1691N is
typically less than 2.5mA at 3.6V power supply. AS1691N 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 SOT23-3L Package and
is rated over the -40°C to 125°C. The all packages are
RoHS and Green compliant.

Features

 Input Voltage Range : 2.5V to 5.5V
 Bipolar Latch Operation, easy to use as output
 Chopper stabilization amplifier stage
 Magnetic Sensitivity (typical)
BOP= -20Gauss, BRP=+20Gauss
 Good RF noise immunity
 Integrated 10Kohms pull-up resistor
 Small Solution Size
 RoHS Compliant
 SOT23-3L Packages
 -40℃ to +125 ℃ Temperature Range

Applications

 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