KX124-1051

The KX124-1051 is a tri-axis ±2g, ±4g, or ±8g silicon micromachined accelerometer with an integrated 2048-byte buffer, tilt detection, directional tap/double-tap detection, activity detection, and free-fall algorithm. The sensing element is fabricated using Kionix's proprietary plasma micromachining process technology. Acceleration sensing is based on the differential capacitance principle generated by motion of the sensing element due to acceleration, further utilizing common-mode rejection to reduce errors caused by process variation, temperature, and environmental stress. The sensing element is hermetically sealed at the wafer level by bonding a second silicon cap wafer to the device using glass frit. A separate ASIC packaged together with the sensing element provides signal conditioning and intelligent user-programmable application algorithms. The accelerometer is housed in a 3×3×0.9 mm LGA plastic package and operates from a 1.71V–3.6V DC supply. A voltage regulator maintains a constant internal operating voltage across the input supply voltage range, enabling stable operating characteristics throughout the input supply voltage range. I²C or SPI digital protocols are used to communicate with the device to configure and monitor updates for tilt, directional tap/double-tap detection, free-fall detection, and activity monitoring algorithms.