Kionix announced accelerometers in a new series of low-power, high-performance inertial sensors optimized for mobile handsets and tablets. The KXTI9 offers a dramatic reduction in active power, and combines a FIFO buffer with an improved embedded algorithm engine, allowing customers to develop new applications with minimal impact on system resources. The KXTJ9, which reduces system cost by eliminating the engine and buffer, offers the lowest active and standby power of any high-performance accelerometer.

Accelerometers Optimized for Mobile Operating Systems

Mobile operating systems such as Google’s Android™ 3.1 and Ice Cream Sandwich, and Microsoft Windows Mobile are defining support for inertial sensors as a must-have capability. Kionix’s two new accelerometers have been designed to address two different implementations: OEM-customized implementations that include features like pedometer, tap-to-answer, and shake-to-wake versus a straightforward implementation that supports the base-level platform requirements.

The KXTI9 is a low-power, high-performance, Fast-mode I2C tri-axis accelerometer. It is pin- and register-compatible with the popular Kionix KXTF9, and offers a 43% reduction in power consumption in 12-bit mode (325μA) and 56% lower power in 8-bit operation (100μA) versus the KXTF9. It includes a 252-byte FIFO/FILO buffer, which simplifies timing requirements and enables burst reads, and has an integrated voltage regulator with a supply voltage range of 1.8V to 3.6V. In addition, the KXTI9 offers a wide range of user-programmable settings, including 8-bit or 12-bit resolution; ±2g, 4g or 8g ranges; and Output Data Rates (ODR) from 12.5 Hz to 800 Hz with programmable high-pass and low-pass filters. The KXTI9 integrates Kionix’s second-generation algorithm engine that improves Directional Tap/Double-Tap™, shake-to-wake, and screen rotation.

The KXTJ9 is pin-compatible with the KXTI9 and offers a lower-cost alternative for a digital-direct output, ultra-low power, tri-axis accelerometer. It features 56% lower power in 12-bit mode (250μA) and a dramatic 95% lower power consumption in 8-bit mode (10μA) as compared to the KXTF9. The KXTJ9 also delivers best-in-class Noise Density of 175 μg/rtHz, improving the performance of other inertial sensors in a system.