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MMA8450QT Datasheet(PDF) 1 Page - Freescale Semiconductor, Inc |
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MMA8450QT Datasheet(HTML) 1 Page - Freescale Semiconductor, Inc |
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1 / 57 page  MMA8450Q Rev 2, 03/2010 Freescale Semiconductor Technical Data An Energy Efficient Solution by Freescale This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2010. All rights reserved. 3-Axis, 8-bit/12-bit Digital Accelerometer The MMA8450Q is a smart low-power, three-axis, capacitive micromachined accelerometer featuring 12 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. The MMA8450Q’s Embedded FIFO buffer can be configured to log up to 32 samples of X,Y and Z-axis 12-bit (or 8-bit for faster download) data. The FIFO enables a more efficient analysis of gestures and user programmable algorithms, ensuring no loss of data on a shared I2C bus, and enables system level power saving (up to 96% of the total power consumption savings) by allowing the applications processor to sleep while data is logged. 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 MMA8450Q has user selectable full scales of ±2g/±4g/±8g. The device can be configured to generate inertial wake-up interrupt signals from any combination of the configurable embedded functions allowing the MMA8450Q to monitor events and remain in a low power mode during periods of inactivity. The MMA8450Q is available in a 3 x 3 x 1 mm QFN package. Features • 1.71 V to 1.89 V supply voltage • ±2g/±4g/±8g dynamically selectable full-scale • Output Data Rate (ODR) from 400 Hz to 1.563 Hz •375 μg/√Hz noise at normal mode ODR = 400 Hz • 12-bit digital output •I2C digital output interface (operates up to 400 kHz Fast Mode) • Programmable 2 interrupt pins for 8 interrupt sources • Embedded 4 channels of motion detection – Freefall or motion detection: 2 channels – Pulse Detection: 1 channel – Transient (Jolt) Detection: 1 channel • Orientation (Portrait/Landscape) detection with hysteresis compensation • Automatic ODR change for auto-wake and return-to-sleep • 32 sample FIFO • Self-Test • 10,000g high shock survivability • RoHS compliant Typical Applications • Static orientation detection (portrait/landscape, up/down, left/right, back/ front position identification) • 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 ORDERING INFORMATION Part Number Temperature Range Package Drawing Package MMA8450QT -40°C - +85°C QFN-16 Tray MMA8450QR1 -40°C - +85°C QFN-16 Tape and Reel 1 GND VDD SCL NC INT2 INT1 GND GND NC GND MMA8450Q 2 16 12 13 14 15 11 10 3 4 5 6 7 8 9 16 Pin QFN 3mm x 3 mm x 1mm 16 PIN QFN CASE 2077-01 MMA8450Q MMA8450Q: XYZ-AXIS ACCELEROMETER ±2g/±4g/±8g Top and Bottom View Top View Pin Connections |
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