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EETE DECEMBER 2012

DESIGN & PRODUCTS MEMS TECHNOLOGIES Top- and bottom-port HD MEMS variable capacitive accelerometers voice MEMS microphones with eight-pin connector The complete analog and digital family of top- and bottom-port The 2466 series from Silicon Designs is a family of low-cost high definition (HD) voice microphones released by Akustica industrial grade triaxial universal MEMS capacitive accel- feature a high 63dB signal-to-noise ratio (SNR) from 20Hz to erometer modules with eight-pin connector. Designed to 20kHz, super wideband fre- provide high-precision shock, quency response, and tightly vibration and acceleration mea- matched +/-2dB sensitiv- surements in three orthogonal ity. These characteristics directions, the units are available support the growing trend in eight unique ranges from ±2 in the mobile device market to ±400g. The model 2466 series to use higher-performance combines three orthogonally audio components along mounted single axis acceler- with noise-processing algorithms to deliver HD voice quality in ometers within an epoxy sealed mobile devices. Akustica’s new microphones are also drop-in anodized aluminium case. The replacements for today’s most commonly used MEMS micro- sensors are interchangeable between the Silicon Designs phones, providing a straightforward path for manufacturers model 2476 and 2480, allowing the 2466 to be used within to upgrade current designs to meet market demand for more applications calling for the use of an 8-pin connector, with natural-sounding conversation and improved speech recogni- the ability to use the same cable. The 2466 series may also tion accuracy that is achieved through HD voice-quality compo- be used as a drop-in replacement of other industry acceler- nents. Multi-microphone noise suppression algorithms rely on ometers of similar type and performance for up to 40% less well-matched acoustic characteristics among the microphones cost, according to the manufacturer. Sensor replacements for optimized performance. The AKU142/342 deliver a tradi- can be achieved in less than 30 seconds for customer cost tional analog output in an industry-standard 2.95x3.76x1.1mm savings and convenience with minimal to no downtime. Un- form factor whereas the AKU240/440 offer digital PDM outputs like many MEMS-based sensors which incorporate passive in industry-standard 3.0x4.0x1.0mm form factors. The AKU142 components, Silicon Designs sensors feature active, self- and AKU240 are Top-port designs, the AKU342 and AKU440 adjusting components. On-board voltage regulation and an microphones are bottom-port designs. All devices have a flat internal voltage reference minimize temperature and voltage frequency response of +/-5dB from 50Hz to 14kHz and come in changes while eliminating the need for additional external faraday-shielded packages for radio frequency and electromag- power regulation. netic immunity Silicon Designs Akustica www.silicondesigns.com www.akustica.com 9-axis motion tracking development module Wearable wireless 3D body motion tracking kit for immersive gaming At electronica, Xsens and STMicroelectronics have demon- PNI Sensor’s SpacePoint Scout development module offers strated what they claim to be the world’s first wearable wireless gaming application developers 9-axis motion tracking tech- 3D body motion tracking system based on consumer-grade nology in one reasonably priced, 25.4x25.4x16.0mm inte- MEMS combo sensors. Xsens built grated module. The unit the demonstrator by combining its includes a suite of sensors patented sensor-fusion algorithms (a 3-axis gyroscope, a and wireless protocols with STMicro- 3-axis accelerometer and electronics’ iNEMO-M1, the 9-axis a 3-axis geomagnetic sen- “Smart System” using motion combo sor), highly proven sensor sensors together with the STM32 fusion algorithms and an microprocessor. The kit which was I2C interface for quick originally designed for the profes- implementation. Space- sional market in movement science, Point Scout comes with the movie industry and video game the RM3000 geomagnetic animation, is now offering a complete sensor, using PNI Sen- motion-capture solution for consum- sor’s proprietary magneto-inductive technology that offers er electronics applications. Wear- over 15 times better resolution and 16 times less noise than able wireless 3D body motion tracking could enable the next commonly used Hall effect magnetic sensors. The RM3000, wave of innovation in cloud-connected wearable sports, fitness, in conjunction with the SpacePoint Scout’s sensor fusion healthcare and gaming sensor accessories for smartphones. algorithms, enables highly accurate pointing and motion “The real-time 3D body motion data enables the development tracking even in the presence of magnetic anomalies. The of apps that can recognize and classify complex motions such module operates from 3.8 to 10VDC and can operate up to as sports techniques by digitizing your exact movements for 921,600 baud. immediate feedback and live sharing of the performance” ex- PNI Sensor plained Per Slycke, CTO and founder, Xsens. www.pnicorp.com Xsens www.xsens.com 38 Electronic Engineering Times Europe December 2012 www.electronics-eetimes.com


EETE DECEMBER 2012
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