The Electric Compass is a high sensitivity digital compass IC for measuring terrestrial magnetism in the X-axis, Y-axis, and Z-axis. It combines magnetic sensors for detecting terrestrial magnetism, a sensor driving circuit, low noise amplifier, high resolution ADC for each channel and control circuit for low power computation.
The Electric Compass supports for low power mode in addition to normal mode to extend battery life. The built-in temperature sensor can compensate for offset drift caused by non-linear ADC characteristics for each temperature. With small footprint and low power consumption, the Electric Compass is suitable for mobile phones and mobile GPS systems.
Advanced Fusion Algorithm
Haechitech provides unique algorithm called Advanced Fusion Algorithm. MAFA processes multiple sensor outputs from e-compass, accelerometer and gyroscope concurrently. MAFA then generates several types of angle information such as Euler angle, quaternion and Euler vector. MAFA enables users to find more accurate offset in e-compass(magnetometer), which is crucial for many application.
Angular rate, an output of the gyroscope sensor, can be calculated through the “Pseudo Gyroscope” solution using e-compass and accelerometer. Pseudo Gyroscope offers many benefits in power consumption and cost reduction by eliminating a gyroscope. Pseudo Gyroscope can be a reasonable alternative to pricey actual gyroscopes.
Calibration for finding offset is critical to get best performance. Typically, “8-Figure Motion” has been used for e-compass calibration, however this motion is unnatural. Haechitech algorithm for Advanced Calibration supports simpler calibration motions such as, “Circular Motion with Tilt” or “Natural Hand (back-and-forth) Motion.”
Digital Hall Sensor
Digital Hall sensor is a multi-function Hall-effect sensor designed with mixed signal CMOS technology. The device integrates Hall elements, dynamic offset cancellation system, a programmable amplifier, low power ADC and an arithmetic logics in a single chip. Bop, Brp, operation magnetic polarity and operation period are programmable by I2C interface.
On-the-shelf s/w package is able to transform each magnetic strength into angle between the magnet and the device with robust algorithm. Small WLCSP footprint and low power operation enables to implement angle gaging system in mobile handset and industrial system.
MXM1xxx products are integrated Hall effect magnetic switches with dynamic offset cancellation, low power consumption, and temperature stability of the magnetic thresholds for highly accurate applications. This sensor is comprised of a Hall element, an offset cancellation circuitry, a low noise gain amplifier, a comparator, and control logic in a single chip.
It supports for programmable function via single wired interface in order to provide more flexible design by changing operation mode (omni-polar/bi-polar/uni-polar), operation threshold level, and output port type.
Temperature & Humidity Sensor
MXH product family are a state of the art temperature and relative humidity sensors utilized proven techniques for measuring humidity using polymer dielectric film along with CMOS mixed signal integrated circuits. It provides fully calibrated digital output(I2C, PWM, PDM) and analog output as well. In particular, its analog output allows for easy integration without the need for additional calibration/component.
The resolution can be changed by command (8/12bit up to 12/14bit for RH/T). Every sensor is individually calibrated and tested and the lot identification is printed on the sensor.