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Micro-amp magnetic gyro sol'n unveiled by Kionix

16 Jan 2013

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Kionix KMX61G

MEMS solution provider Kionix Inc. has just released a high-performance, low-power, magnetometer-accelerometer device called the KMX61G. The company had introduced novel inertial sensor technologies that drive down current consumption and size for resource-constrained portable devices at the recently concluded 2013 International CES in Las Vegas, USA. (See also CES 2013 brings MEMS closer to consumers.)

The device is enhanced with integrated sensor fusion software and auto-calibration algorithms to deliver highly accurate gyro emulation using just 550µA of power. The company states that the KMX61G offers a power reduction of 80-90 per cent compared to traditional consumer gyros, making it ideal for mobile applications

Now, a single 6-axis device can provide 9-axis accelerometer, magnetometer (e-compass) and gyro outputs with a power profile that enables applications previously unreachable using traditional 9-axis solutions. (See also Low-power 9-axis motion sensor shown at CES 2013.)

"We see many applications in mobile devices that can benefit from gyroscope functionality but do not require the extreme performance of a traditional gyro," said Jeremie Bouchaud, Director & Sr. Principal Analyst, IHS iSuppli. "The magnetic gyroscope can meet these needs well while offering power, cost and size benefits that are very attractive."

In addition to Kionix's proprietary calibration and sensor fusion algorithms, the KMX61G includes a range of capabilities to enable precise control of the sensor including 512B FIFO buffer with watermarking, embedded temperature sensor and a low-power, embedded motion wake-up function.

With applicability to the large and rapidly growing smartphone, tablet, and health and fitness devices market, the KMX61G is well-suited to help design engineers achieve new levels of product performance.

 Kionix KMX61G

One of the many possible applications for the KMX61G magnetometer-accelerometer.


* 5µA standby, 550µA full operating power consumption

* 3x3x0.9mm package size

* User-programmable ±2g/±4g/±8g full-scale accelerometer range

* ±1200µT total magnetometer measurement range

* 512B FIFO buffer with watermarking capability

* Embedded temperature sensor

* User-selectable ODR from 0.781Hz to 1.6kHz

* Magnetometer algorithms for auto-calibration and MI rejection

* Low-power motion wake-up

* Supply voltages between 1.8 and 3.3V

* Excellent bias stability over temperature. Bias errors resulting from assembly can be trimmed digitally by the user.

* Accelerometer, magnetometer and emulated gyro outputs with up to 14bit resolution


The KMX61G will be sampling in Q1 2013 to qualified customers with unit pricing of $2.50 in quantities of 1,000.

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