ROHM KX022-1020

The KX022 is a tri- axis ± 2g, ± 4g or ± 8g silicon micromachined accelerometer with integrated 256 byte buffer, orientation, tap/double tap, and activity detecting algorithms. The sense element is fabricated using Kionix's proprietary plasma micromachining process technology. Acceleration sensing is based on the principle of a differential capacitance arising from acceleration- induced motion of the sense element, which further utilizes common mode cancellation to decrease errors from process variation, temperature, and environmental stress. The sense element is hermetically sealed at the wafer level by bonding a second silicon lid wafer to the device using a glass frit. A separate ASIC device packaged with the sense element provides signal conditioning, and intelligent user- programmable application algorithms. The accelerometer is delivered in a 2 × 2 × 0.9 mm LGA plastic package operating from a 1.71 - 3.6V DC supply voltage regulators are used to maintain constant internal operating voltages over the range of input supply voltages. This results in stable operating characteristics over the range of input supply voltages and virtually undetectable ratiometric error. I²C or SPI digital protocol is used to communicate with the chip to configure and check for updates to the orientation, Directional Tap™ detection and activity monitoring algorithms.

• 2 × 2 × 0.9 mm LGA
• User-selectable g Range and Output Data Rate
• User-selectable low power or high resolution mode
• Digital High-Pass Filter Outputs
• Embedded FIFO/FILO buffer
• Low Power Consumption with FlexSet™ Performance Optimization
• Internal voltage regulator
• Enhanced integrated Directional Tap/Double-Tap™, and Device-orientation Algorithms
• User-configurable wake-up function
• Digital I²C up to 3.4MHz
• Digital SPI up to 10MHz
• Lead-free Solderability
• Excellent Temperature Performance
• High Shock Survivability
• Factory Programmed Offset and Sensitivity
• Self-test Function