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

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

The ADXL346 is well suited for mobile device applications. It measures the static acceleration of gravity in tiltsensing applications, ...More

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

Product Description

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

The ADXL346 is well suited for mobile device applications. It measures the static acceleration of gravity in tiltsensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (4 mg/LSB) enables measurement of inclination changes 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 userset thresholds. Tap sensing detects single and double taps in any direction. Freefall sensing detects if the device is falling. Orientation detection is capable of concurrent fourand sixposition sensing and a userselectable 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 memorymanagement systemwith 32level first in, first out (FIFO) buffer can be used to store data tominimize host processor activity and lower overall system power consumption.

Low power modes enable intelligent motionbased 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, 16lead, plastic package.

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

    • RESOURCES & TOOLS

    What is your task? Try Lead the Way AdvisorTM BETA
    • Ultralow power: as low as 35 μA in measurement mode and 1 μA in standby mode at VS = 2.5 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, embeddedmemorymanagement system with FIFO technologyminimizes host processor load
    • Single tap/double tap detection
    • Activity/inactivitymonitoring
    • Freefall detection
    • Concurrent fourand sixposition orientation detection
    • Supply and I/O voltage range: 1.7 V to 2.75 V
    • SPI (3and 4wire) and I2C digital interfaces
    • Flexible interruptmodesmappable to either interrupt pin
    • See data sheet for additional features

    ADXL346 Functional Block Diagram

    ADXL346 Functional Block Diagram
    ADXL346 Functional Block Diagram

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    Part# # of Axes Range Sensitivity Sensitivity Accuracy (%) Output Type Typical Bandwidth (kHz) Noise Density (µg/rtHz) Voltage Supply (V) Supply Current Temp Range (°C) Package Price* (1000-4999) Regional Recommendation
    ADXL325 3 +/- 5g 174 mV/g ±10 Analog 1.6 250 1.8 to 3.6 350µA -40 to 85°C 4mm x 4mm LFCSP $2.38 -
    ADXL326 3 +/- 16g 57 mV/g ±10 Analog 1.6 250 1.8 to 3.6 350µA -40 to 85°C 4mm x 4mm LFCSP $2.38 -
    ADXL327 3 +/- 2g 420 mV/g ±10 Analog 1.6 250 1.8 to 3.6 350µA -40 to 85°C 4mm x 4mm LFCSP $2.38 -
    ADXL335 3 +/- 3g 300 mV/g ±10 Analog 1.6 300 1.8 to 3.6 350µA -40 to 85°C 4mm x 4mm LFCSP $2.38 -
    ADXL345 3 +/- 2/4/8/16g up to 256 LSB/g ±10 Digital 1.6 - 2.0 to 3.6 145µA -40 to 85°C 3mm x 5mm x 1mm LGA $3.04 -
    ADXL346 3 +/- 2/4/8/16g up to 256 LSB/g ±10 Digital 1.6 - 1.7 to 2.75 145µA -40 to 85 3mm x 3mm x 0.95 mm LGA - -
    ADXL103 1 +/- 1.7g 1000 mV/g ±4 Analog 2.5 110 3 to 6 0.7mA -40 to 125°C 5mm x 5mm x 2mm LCC $8.19 -
    ADXL203 2 +/- 1.7g 1000 mV/g ±4 Analog 2.5 110 3 to 6 0.7mA -40 to 125°C 5mm x 5mm x 2mm LCC $9.85 jp
    ADXL213 2 +/- 1.2g 30 %/g ±10 PWM 2.5 160 3 to 6 0.7mA -40 to 85°C 5mm x 5mm x 2mm LCC $9.85 -
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    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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    *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.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.