AS1691
Bipolar Latch Detection High Performance Hall-Effect Sensor IC
General Description
Using low power CMOS process, the AS1691 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 AS1691 is typically less than 2.0mA at 3.6V power supply. AS1691 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 ， SOT23-3L and SIP-3L Package and is rated over the -40°C to 125°C. The all packages are RoHS and Green compliant.
Features
● Input Voltage Range : 2.2V to 5.5V
● Bipolar Latch Operation, easy to use as output
● Chopper stabilization amplifier stage● Magnetic Sensitivity (typical)BOP= ±25Gauss, BRP=±25Gauss
● Good RF noise immunity
● Integrated 10Kohms pull-up resistor
● Small Solution Size
● RoHS Compliant
● DFN1014-4L,SOT23-3L and SIP-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
