The MMC3524xPJ Three-Axis Magnetic Sensor from MEMSIC Inc. offers stability over temperature and time, and insensitivity to external magnetic disturbance. In particular, the offset drift over temperature is <1.5mGauss, which the company claims is more than 100x better than the nearest competitor. Additionally, the device can withstand a magnetic disturbance of up to 100G without recalibration. This enhanced stability enables the elimination of the inconvenient and frequent “figure-8” user calibration. The MMC3524xPJ uses MEMSIC’s proprietary anisotropic magnetic resistive (AMR) technology to achieve its high performance. With a full scale range of +/- 24 Gauss (+/- 2400 µTesla), and an RMS noise of 2mGauss (0.2uT), the device offers a dynamic range 2x – 5x greater than its competition. This results in a more accurate heading determination with less averaging. When combined with MEMSIC’s proprietary algorithms, this enables a heading accuracy of <1 degree, a necessary requirement to enabling Location Based Services in mobile devices.
At 50uA (10Hz rate), the MMC3524xPJ reduces current consumption by 5x compared with industry-leading products, and runs from a single 1.8V supply. In addition, the MMC3524xPJ offers a sleep current of 5nA (max), which is 1000x lower than the competition.
The MMC3524xPJ is offered in an industry-standard 1.6 mm. x 1.6 mm. x 0.5 mm package and operates from a single 1.8 V or Dual 1.8V / 3V supplies, making it well-suited for mobile applications such as electronic compassing in cellular phones and tablets, pedestrian navigation, gaming controls, wristwatches, in-vehicle GPS navigation, and other magnetic field measuring applications.