Xtrinsic Accelerometers
FXLS8471Q Xtrinsic
SPI Accelerometer
Low-power, low-noise, pin-compatible
SPI Accelerometer
Target Applications
• Alarm systems
• Asset tracking
• Digital still cameras
• Game controllers
• Gaming
• Home medical
• Hospital equipment
• Inclinometers
• Instrumentation
• Laptops
• Medical
• Remote control cars/helicopters
• Remote controls
• Shipment tracking
• Smartphones
• Sports gear
• Surveying equipment
• Tablets
• Toys
Self-Test
Y-Axis
Transducer
C to V
Converter
Gain
AAF
ADC
Overview
The Xtrinsic FXLS8471Q low-power, low-noise accelerometer has unique performance and
compatibility for laptops, game controllers, white goods and mass market applications. This new
FXLS8471Q accelerometer has a SPI interface that is pin compatible with Freescale’s industry-leading
I
2
C accelerometer portfolio.
The FXLS8471Q accelerometer is highly versatile for industrial and consumer high-performance low-g
applications that offer noise density, board mount offset, temperature performance and sensitivity.
Integrated motion detection features include tilt, shake and tap detection with a new vector magnitude
output that simplifies implementation and reduces power consumption.
To operate with extremely low power, the FXLS8471Q accelerometer has six user-configurable sample
rates that can be set over a wide range from 1.5 to 800 samples per second. The operating current is
proportional to the sample rate. The power scheme contains normal mode and low-power operational
modes, offering best-in-class savings in supply current and extremely high resolution for very small
motion detection. See the Xtrinsic accelerometer family comparison table for more details.
FXLS8471Q Xtrinsic 14-bit Accelerometer Block Diagram
VDD
3-Axis Accelerometer
X-Axis
Transducer
VDDIO
VSS
Regulator,
Voltage
Reference
FXLS8471Q Xtrinsic 14-bit Accelerometer Block Diagram
Oscillator,
Clock
Generator
Trim
Logic
RST
INT1
INT2
Embedded
DSP
Functions
SPI
Z-Axis
Transducer
I
2
C
Interface
SCL/SCLK
SDA/MOSI
SA0/MISO
SA1/CS_B
Acceleration Vector
Magnitude
Detection
Freefall/Motion
Detection
Transient
Acceleration
Detection
Single/Double
Pulse (Tap)
Detection
Orientation
Detection
Auto-Wake/Auto-Sleep Logic with Programmable Inactivity Counter
Active Mode Options:
Low Power
Low Noise + Power
High Resolution
Normal
Active Mode
Wake
Auto-Wake/Sleep
Active Mode
Sleep
Sleep Mode Options:
Low Power
Low Noise + Power
High Resolution
Normal
Xtrinsic
Sensing Blocks
I/O Pins
Digital Blocks
Supporting Blocks
Freescale Accelerometer Product Feature Comparison
FXLS8471Q
Accelerometer
• Extreme performance
.25 mg/count
sensitivity
• Extended features
FIFO
Configurable P/L
trip angles
High pass filter
Transient detect
• SPI output
• Drivers available
MMA8491Q
Accelerometer
• Extreme low power
0.35 uA/Hz
• Cost efficient
• 1 mg/count sensitivity
• Industrial package
• Drivers available
MMA845xQ
Accelerometers
• Extreme performance
.25 mg/count sensitivity
• Extended features
FIFO
Configurable P/L trip
angles
High pass filter
Transient detect
• I C output
2
MMA865xFC
Accelerometers
• High performance
• Well rounded
• Cost competitive
• Low power consumption
• Low-voltage compatibility
• Rich features
P/L detection
High pass filter
Transient detect
• Drivers available
FXOS8700CQ
6-Axis Sensor
• Highly integrated
• High performance
• Low power
consumption
• Wide dynamic range
• Embedded
autonomous hard
iron calibration
• Drivers available
• Drivers available
Accelerometer
Implementations
• Free fall
• Motion control
• Portrait/landscape
• Shock
• Tilt
• User interface
• Warranty reporting
Development Tools and Software
Kit Number
FRDM-FXS-MULTI
FRDM-FXS-MULTI-B
BRKOUT-FXLS8471Q
Component for Processor Expert
Description
Freescale Freedom Development Platform for Xtrinsic Sensors, including software
Freescale Freedom Development Platform for Xtrinsic Sensors with Bluetooth,
including software
Breakout board for evaluating the FXLS8471Q Xtrinsic accelerometer
Supports Kinetis MCUs
Documentation
Document Number
FXLS8471Q
AN4692
Freescale Freedom
Development Platform
featuring the SPI
Accelerometer
AN4693
AN4694
FXLS8471UG
Description
Product specification data sheet.
Using the Xtrinsic FXLS8471Q Accelerometer Vector Magnitude Function
Application Note
Using the Xtrinsic FXLS8471Q Transient-Acceleration Function Application Note
Using the Xtrinsic FXLS8471Q Command Line Interface Software Application Note
Freescale Xtrinsic FXLS8471Q Demonstration Software User Guide
Freescale: A Leader in Sensing Solutions
Expanding on more than 30 years of sensor innovation, Freescale Xtrinsic sensing solutions are
designed with the right combination of high-performance sensing capability, processing capacity
and customizable software to help deliver smart, differentiated sensing applications. With Xtrinsic
sensing solutions, our vision is to offer a diverse and differentiated product portfolio to meet the
expanding needs of the automotive, consumer and industrial segments. Xtrinsic solutions offer
ideal blends of functionality and intelligence designed to help our customers differentiate and win
in highly competitive markets.
For more information, visit
freescale.com/xyz
Freescale, the Freescale logo, Kinetis and Processor Expert are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat.
& Tm. Off. Xtrinsic is a trademark of Freescale Semiconductor, Inc. All other product or service names are the property of their
respective owners. © 2013 Freescale Semiconductor, Inc.
Document Number: FXLS8471QFS REV 0
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