MMA8451QT(2010) 데이터 시트보기 (PDF) - Freescale Semiconductor
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MMA8451QT Datasheet PDF : 53 Pages
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Freescale Semiconductor
Technical Data
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3-Axis, 14-bit/8-bit
Digital Accelerometer
MMA8451Q
Rev 3, 09/2010
MMA8451Q
The MMA8451Q 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 MMA8451Q to monitor events
and remain in a low power mode during periods of inactivity. The MMA8451Q is
available in a 3 mm x 3 mm x 1 mm QFN package.
MMA8451Q: 3-AXIS DIGITAL
ACCELEROMETER
±2g/±4g/±8g
Top and Bottom View
Features
• 1.95 V to 3.6 V supply voltage
• 1.6 V to 3.6 V interface voltage
• ±2g/±4g/±8g dynamically selectable full-scale
• Output Data Rates (ODR) from 1.56 Hz to 800 Hz
• 99 μg/√Hz noise
• 14-bit and 8-bit digital output
• I2C digital output interface (operates to 2.25 MHz with 4.7 kΩ pull-up)
• 2 programmable interrupt pins for 7 interrupt sources
16 PIN QFN
3 mm x 3 mm x 1 mm
CASE 2077-01
• 3 embedded channels of motion detection
– Freefall or Motion Detection: 1 channel
– Pulse Detection: 1 channel
Top View
– Jolt Detection: 1 channel
• Orientation (Portrait/Landscape) detection with programmable hysteresis
• Automatic ODR change for Auto-WAKE and return to SLEEP
• 32 sample FIFO
VDDIO 1
16 15 14
13 NC
• High Pass Filter Data available per sample and through the FIFO
• Self-Test
BYP 2
12 GND
• RoHS compliant
• Current Consumption: 6 μA – 165 μA
Typical Applications
NC 3
SCL 4
MMA8451Q
11 INT1
10 GND
• E-Compass applications
• Static orientation detection (Portrait/Landscape, Up/Down, Left/Right, Back/
Front position identification)
GND 5
67 8
9 INT2
• Notebook, E-Reader and Laptop Tumble and Freefall Detection
• Real-time orientation detection (virtual reality and gaming 3D user position
feedback)
Pin Connections
• 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)
Part Number
MMA8451QT
MMA8451QR1
ORDERING INFORMATION
Temperature Range
Package Description
-40°C to +85°C
QFN-16
-40°C to +85°C
QFN-16
Shipping
Tray
Tape and Reel
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.
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