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AS8801

Digital Linear Hall Sensor

General Description

     AS8801 is the digital linear Hall sensor in measuring the intensity of the magnetic flux through selecting options of the various sensitivity with the low power consumption providing a built-in 16 bits ADC digital output. It can also detect the open/close state for many applications by one or multiple external magnets.
     This sensor is comprised of a Hall element, an offset cancellation circuitry, a programmable gain amplifier, a 16-bits low power ADC, and control logic in a single chip. The adjustment of the open/close state threshold values, the magnetic polarity, and the operation period can be programmed through I2C interface. The software package supports to convert the magnetic strength into the angle or distance by detecting intensity of flux between the external magnet and the sensing element. Because the small WLCSP package, the low current consumption, and the stable performance, the device can be used in the hand set and consumer electronics and any other industries. One of the typical applications in the smart phone is the lid opening angle measurement system.
    The device is a RoHs and Green compliant WLCSP-9B (1.33 x 1.33 x 0.53mm3) package.

Features

●  Magnetometer device for magnets on external equipment

●  Built-in 8~16bit Adjustable ADC magnetometer data outputs

●  Input Voltage Range VDD: 1.8V to 3.6V
●  Operation Current: 180uA (typ.) at 50Hz Operating Frequency

●  Digital Interface Supply VID: 1.65V to VDD(1.8V Typical)

●  16~8-bits selectable data outputs for each built-in hall element

●  High Dynamic Range of Maximum ±40.96m
●  High Resolution of Maximum 0.3125uT/LSB(16-bit Setting with 10.24mT Dynamic Range)

●  Programmable Through I2C Compatible Interface (Up to 400kHz): 1.65~3.65V I2C interface

●  Interrupt Function: when magnetic intensity level sensed is higher than upper threshold level or lower than lower threshold level,interrupt signal is generated through INTB PAD

●  Low Power Design: Standby Mode and Wait Mode

●  Built-in Oscillator for internal Clock Source

●  Power On Reset

●  RoHS and Green Compliant
●  WLCSP-9B (1.33x1.33x0.53mm3)Packages
●  -40℃ to +125 ℃ Temperature Range

Applications

●  Magnetometer for External Detection
●  Lid Opening Angle Detection
●  Mobile Phones and Smart Phones
●  Touch Screen Disable
●  Mechanical Switch Replacement
●  Universal Remote Control
●  Control Display Switch

●  VCM Modules

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