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ADXL346:  3-Axis, ±2 g/±4 g/±8 g/±16 g Ultralow Power Digital Accelerometer

Product Details


The ADXL346 is a small, thin, ultralow power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either an SPI (3- or 4-wire) or I2C® digital interface.

The ADXL346 is well suited for mobile device applications. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (4 mg/LSB) enables measurement of inclination changes of less than 1.0°.

Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion by comparing the acceleration on any axis with user-set thresholds. Tap sensing detects single and double taps in any direction. Free-fall sensing detects if the device is falling. Orientation detection is capable of concurrent four- and six-position sensing and a user-selectable interrupt on orientation change for 2D or 3D applications. These functions can be mapped individually to either of two interrupt output pins. An integrated, patent pending memory management system with 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption.

Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.

The ADXL346 is supplied in a small, thin, 3 mm × 3 mm × 0.95 mm, 16-lead, plastic package.

Applications

  • Handsets
  • Medical instrumentation
  • Gaming and pointing devices
  • Industrial instrumentation
  • Personal navigation devices
  • Hard disk drive (HDD) protection

FEATURES and BENEFITS

  • Ultralow power: as low as 23 μA in measurement mode and 0.2 μA in standby mode at VS = 2.6 V (typical)
  • Power consumption scales automatically with bandwidth
  • User-selectable resolution
    -- Fixed 10-bit resolution
    -- Full resolution, where resolution increases with g range, up to 13-bit resolution at ±16 g (maintaining 4 mg/LSB scale factor in all g ranges)
  • Patent pending, embedded memory management system with FIFO technology minimizes host processor load
  • Single tap/double tap detection
  • Activity/inactivity monitoring
  • Freefall detection
  • Concurrent four- and six-position orientation detection
  • Supply and I/O voltage range:
    1.7 V to 2.75 V
  • SPI (3- and 4-wire) and I2C digital interfaces
  • Flexible interrupt modes mappable to either interrupt pin
  • See data sheet for additional features

Functional Block Diagram for ADXL346

Similar Products

  • ADXL345: Accepts a higher supply voltage range, up to 3.6V. Slightly larger package: 3mm x 5mm.

OF NOTE ...

Documentation

Title Content Type File Type
ADXL346: 3-Axis, ±2 g/±4 g/±8 g/±16 g Ultralow Power Digital Accelerometer Data Sheet (Rev B, 05/2011) (pdf, 840 kB) Data Sheets PDF
AN-1078: ADXL346 Quick Start Guide  (pdf, 97 kB) Application Notes PDF
AN-1063: Oversampling Technique to Improve ADXL345 Output Resolution  (pdf, 89 kB) Application Notes PDF
AN-1057: Using an Accelerometer for Inclination Sensing  (pdf, 168 kB) Application Notes PDF
AN-1025: Utilization of the First In, First Out (FIFO) Buffer in Analog Devices, Inc. Digital Accelerometers  (pdf, 138 kB) Application Notes PDF
AN-688: Phase and Frequency Response of iMEMS® Accelerometers and Gyros  (pdf, 135 kB) Application Notes PDF
Full-Featured Pedometer Design Realized with 3-Axis Digital Accelerometer  (pdf, 598 kB)
Analog Dialogue, June 2010
Technical Articles PDF
Human Fall Detection Using New MEMS Accelerometer Technology
For humans, an unobserved fall can have very serious consequences. Statistics show that the majority of serious consequences are not the direct result of falling, but rather are due to a delay in assistance and treatment. Post-fall consequences can be greatly reduced if relief personnel can be alerted in time.
(ECN, December 9, 2009)
Technical Articles HTML
Full-Featured Pedometer Design Realized with 3-Axis Digital Accelerometer  (pdf, 598 kB)
Analog Dialogue, June 2010
Analog Dialogue PDF
Detecting Human Falls with a 3-Axis Digital Accelerometer
(Analog Dialogue, Vol. 43, July 2009)
Analog Dialogue HTML
Accelerometer Specifications - Quick Definitions Technical Documentation HTML
Basic MEMS Terminology  (pdf, 40 kB) Overview PDF
What are the shock ratings or limits for the MEMS devices? FAQs/RAQs HTML
What is an inertial sensor? FAQs/RAQs HTML
What is an accelerometer and a gyroscope, and how do they differ? FAQs/RAQs HTML
Where would you use an accelerometer? FAQs/RAQs HTML
Where would you use a gyroscope? FAQs/RAQs HTML
What are the major error sources for inertial sensors? FAQs/RAQs HTML
What is the limit of resolution of an inertial sensor? FAQs/RAQs HTML
I need finer resolution. What do I do? FAQs/RAQs HTML
MEMS Accelerometer Applications, what's Fantasy and what's Reality? FAQs/RAQs HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Accelerometer FIFO Calculator
Help configure the ADXL345 and ADXL346 digital accelerometer devices
Design Calculators HTML
ADXL345 Input 3-Axis Digital Accelerometer Linux Driver Device Drivers HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

ADXL346 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADXL346ACCZ-RL Status: Production 16 ld LGA (3x3) 16 Ind Reel, 5000 - - E  Material Info PCN Purchase
ADXL346ACCZ-RL7 Status: Production 16 ld LGA (3x3) 16 Ind Reel, 1500 - $3.04 E  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADXL346 Datalogger / Development Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADXL346Z-DB Status: Production Ultra Low Power Development Board $59.00 Yes -
ADXL346Z Breakout Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADXL346Z Status: Production Breakout Board $30.00 Yes -
Real Time Eval System for Digital Output Sensor
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADXL313-Z-M Status: Production Mother Board and Satellite Board $249.00 Yes -
EVAL-ADXL313-Z-S Status: Production Satellite Board $149.00 Yes -
EVAL-ADXL343Z-M Status: Production Mother Board $249.00 Yes -
EVAL-ADXL343Z-S Status: Production Satellite Board $149.00 Yes -
EVAL-ADXL344Z-M Status: Production Mother Board $249.00 Yes -
EVAL-ADXL344Z-S Status: Production Satellite Board $149.00 Yes -
EVAL-ADXL312Z-M Status: Production Mother Board $249.00 Yes -
EVAL-ADXL312Z-S Status: Production Satellite Board $149.00 Yes -
EVAL-ADXL345Z-M Status: Production Mother Board $249.00 Yes -
EVAL-ADXL345Z-S Status: Production Satellite Board $149.00 Yes -
EVAL-ADXL346Z-M Status: Production Mother Board $249.00 Yes -
EVAL-ADXL346Z-S Status: Production Satellite Board $149.00 Yes -
EVAL-ADXRS450Z-M Status: Production Mother Board $249.00 Yes -
EVAL-ADXRS450Z-S Status: Production Satellite Board $149.00 Yes -
EVAL-ADXRS453Z-M Status: Production Mother Board $249.00 Yes -
EVAL-ADXRS453Z-S Status: Production Satellite Board $149.00 Yes -
EVAL-ADXRS800Z-M Status: Production Evaluation Board $249.00 Yes -
EVAL-ADXRS800Z-S Status: Production Evaluation Board $150.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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