General Description
Using bipolar process, the AS1640 is designed for high performance latch detection hall effect application, such as home appliances, rotor position sensing, brushless DC motor etc. The hall IC integrated an on-chip hall voltage generator for magnetic sensing, a comparator that amplifiers the hall voltage, an open collector output, and a Schmitt trigger to provide switching hysteresis for noise rejection, reverse protection, and a voltage regulator for operation with supply voltage of 3.8V to 40V.
AS1640 is designed to respond to alternating North and South poles. White 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 and SIP-3L Package and is rated over the -50°C to 150°C. the package is RoHS compliant.
Features
● Input Voltage Range : 3.8V to 40V
● Reverse Protection
● Bipolar Latch Operation
● High Performance Bipolar Process Tech.
● High Sensitivity Hall Sensor
● Magnetic Sensitivity (typical) BOP=45Gauss, BRP=-45Gauss
● Open Collector Output
● Small Solution Size
● RoHS Compliant
● SOT23-3L and SIP-3L Packages
● -50℃ to +150 ℃ Temperature Range
Applications
● Automotive, Home appliances, Industrial
● Rotor Position Sensing
● Brushless DC Motor/Fan
● Speed Measurement
● Revolution Counting
● Magnetic Encoder
