MMA8451QT

The MMA8451QT is a smart low-power, three-axis capacitive Micromachined Accelerometer with 14 bits of resolution. This accelerometer is packed with embedded functions with flexible user-programmable options, configurable to two interrupt pins. Embedded interrupt functions allow for overall power savings relieving the host processor from continuously polling data. There is access to both low-pass filtered data as well as high-pass filtered data, which minimizes the data analysis required for jolt detection and faster transitions. The device can be configured to generate inertial wake-up interrupt signals from any combination of the configurable embedded functions allowing the accelerometer to monitor events and remain in a low-power mode during periods of inactivity.

• 1.6 to 3.6V Interface Voltage
• ±2/±4/±8g Dynamically Selectable Full-scale
• Output Data Rates (ODR) from 1.56 to 800Hz
• 99μg/√Hz Noise
• 14-bit and 8-bit Digital Output
• I²C Digital Output Interface (Operates to 2.25MHz with 4.7kΩ Pull-up)
• Two Programmable Interrupt Pins for Seven Interrupt Sources
• Three Embedded Channels of Motion Detection, such as Freefall or Motion, Pulse and Jolt Detection
• Orientation (Portrait/Landscape) Detection with Programmable Hysteresis
• Automatic ODR Change for Auto-wake and Return to Sleep
• 32 Sample FIFO
• High Pass Filter Data Available per Sample and Through FIFO
• Self-test
• 6 to 165μA Current Consumption

Applications

Sensing & Instrumentation, Consumer Electronics, Computers & Computer Peripherals