MMA8451QR1

Description

The MMA8451QR1 is a smart, low power, three axis capacitive micromachined accelerometer with 14bits of resolution in 16 pin QFN package. This accelerometer is packed with embedded functions and flexible user programmable options with configurable two interrupt pins. Embedded interrupt functions allow for overall power savings relieving host processor from continuously polling data. It provides access to both low pass filtered data as well as high pass filtered data which minimizes 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 configurable embedded functions allowing MMA8451Q to monitor events and remain in low power mode during periods of inactivity.

Features

Supply voltage range from 1.95V to 3.6V
Interface voltage range from 1.6V to 3.6V
±2g/±4g/±8g dynamically selectable full scale measurement range
Output data rate (ODR) from 1.56Hz to 800Hz
99µg/√Hz noise
14bit and 8bit digital output
I2C digital output interface (operates to 2.25MHz with 4.7Kohm pull up)
Sensitivity of 4096counts/g (2g mode), 2048counts/g (4g mode) and 1024counts/g (8g mode)
Sensitivity accuracy of ±2.64%
Operating temperature range from -40°C to 85°C

Application

• E-Compass applications
• Static orientation detection (Portrait/Landscape, Up/Down, Left/Right, Back/ Front position identification)
• Notebook, E-Reader and Laptop Tumble and Freefall Detection
• Real-time orientation detection (virtual reality and gaming 3D user position feedback)
• Real-time activity analysis (pedometer step counting, freefall drop detection for HDD, dead-reckoning GPS backup)
• Motion detection for portable product power saving (Auto-SLEEP and Auto-WAKE for cell phone, PDA, GPS, gaming)
• Shock and vibration monitoring (mechatronic compensation, shipping and warranty usage logging)
• User interface (menu scrolling by orientation change, tap detection for button replacement)