Data Sheet

MMA8452Q
Sensors
Freescale Semiconductor, Inc. 11
5 Functionality
The MMA8452Q is a low-power, digital output 3-axis linear accelerometer with a I
2
C interface and embedded logic used to
detect events and notify an external microprocessor over interrupt lines. The functionality includes the following:
• 8-bit or 12-bit data which includes High-Pass Filtered data
• 4 different oversampling options for compromising between resolution and current consumption based on application
requirements
• Additional Low-Noise mode that functions independently of the Oversampling modes for higher resolution
• Low Power and Auto-WAKE/SLEEP modes for conservation of current consumption
• Single-/Double-pulse with directional information 1 channel
• Motion detection with directional information or Freefall 1 channel
• Transient detection based on a high-pass filter and settable threshold for detecting the change in acceleration above a
threshold with directional information 1 channel
• Portrait/Landscape detection with trip points fixed at 30° and 60° for smooth transitions between orientations.
All functionality is available in 2g, 4g or 8g dynamic ranges. There are many configuration settings for enabling all the different
functions. Separate application notes have been provided to help configure the device for each embedded functionality.
Table 8. Features of the MMA845xQ devices
Feature List MMA8451 MMA8452 MMA8453
Digital Resolution (Bits)
14 12 10
Digital Sensitivity (Counts/g)
4096 1024 256
Data-Ready Interrupt
Yes Yes Yes
Single-Pulse Interrupt
Yes Yes Yes
Double-Pulse Interrupt
Yes Yes Yes
Directional-Pulse Interrupt
Yes Yes Yes
Auto-WAKE
Yes Yes Yes
Auto-SLEEP
Yes Yes Yes
Freefall Interrupt
Yes Yes Yes
32 Level FIFO
Yes No No
High-Pass Filter
Yes Yes Yes
Low-Pass Filter
Yes Yes Yes
Orientation Detection Portrait/Landscape = 30°, Landscape to Portrait = 60°,
and Fixed 45° Threshold
Yes Yes Yes
Programmable Orientation Detection
Yes No No
Motion Interrupt with Direction
Yes Yes Yes
Transient Detection with High-Pass Filter
Yes Yes Yes
Low Power Mode
Yes Yes Yes