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Document Number: MMA8451Q
Rev. 10.1, 05/2016
NXP Semiconductors
Data sheet: Technical data
© 2016 NXP B.V.
MMA8451Q, 3-axis, 14-bit/8-bit
digital accelerometer
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 wakeup 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 16-pin QFN, 3 mm x 3 mm x 1 mm package.
Features
• 1.95 V to 3.6 V supply voltage
• 1.6 V to 3.6 V interface voltage
•±2 g/±4 g/±8 g 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
•I
2
C
digital output interface (operates to 2.25 MHz with 4.7 kΩ pullup
)
• Two programmable interrupt pins for seven interrupt sources
• Three embedded channels of motion detection
— Freefall or motion detection: one channel
— Pulse detection: one channel
— Jolt detection: one channel
• 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 the FIFO
•Self-test
• Current consumption: 6 μA to 165 μA
Typical Applications
• 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
)
Ordering information
Part number Temperature range Package description Shipping
MMA8451QT –40 °C to +85 °C QFN-16 Tray
MMA8451QR1 –40 °C to +85 °C QFN-16 Tape and Reel
16-pin QFN
3 mm x 3 mm x 1 mm
MMA8451Q
Top and bottom view
Top view
Pin connections
1
2
3
4
59
10
11
12
13
141516
876
NC
VDD
NC
VDDIO
BYP
DNC
SCL
GND
NC
GND
INT1
GND
INT2
SA0
NC
SDA
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 1 Seite 3 Seite 5 Seite 17
- ・ Abmessungen des Paketumrisses on Seite 53 Seite 54
- ・ Teilenummerierungssystem on Seite 1
- ・ Blockdiagramm on Seite 3
- ・ Typisches Anwendungsschaltbild on Seite 1
- ・ Schweißen Temperatur on Seite 52
- ・ Beschreibung der Funktionen on Seite 11
- ・ Technische Daten on Seite 1 Seite 6 Seite 9
- ・ Anwendungsbereich on Seite 1 Seite 25
- ・ Elektrische Spezifikation on Seite 6 Seite 7
