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ADXL345:  3-Axis, ±2 g/±4 g/±8 g/±16 g Digital Accelerometer

The ADXL345 is a small, thin, low 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 acces-sible through either a SPI (3- or 4-wire) or I2C digital interface.

The ADXL345 is well suited for mobile device applications. It measures the static acceleration of gravity in ...More

ADXL345:  3-Axis, ±2 g/±4 g/±8 g/±16 g Digital Accelerometer

Product Description

The ADXL345 is a small, thin, low 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 acces-sible through either a SPI (3- or 4-wire) or I2C digital interface.

The ADXL345 is well suited for mobile device applications. It measures the static acceleration of gravity in tilt-sensing appli-cations, 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 and if the acceleration on any axis exceeds a user-set level. Tap sensing detects single and double taps. Free-fall sensing detects if the device is falling. These functions can be mapped to one of two interrupt output pins. An integrated, patent pending 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor intervention.

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

The ADXL345 is supplied in a small, thin, 3 mm × 5 mm × 1 mm, 14-lead, plastic package.

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  • Ultralow power: as low as 40 μA in measurement mode and 0.1 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)
  • Embedded, patent pending FIFO technology minimizes host processor load
  • Tap/double tap detection
  • Activity/inactivity monitoring
  • Free-fall detection
  • Supply voltage range: 2.0 V to 3.6 V
  • I/O voltage range: 1.7 V to VS
  • See data sheet for additional features

ADXL345 Functional Block Diagram

OF NOTE ...

View Evaluation System Documentation

For additional ADI Healthcare Products and related information, please visit www.analog.com/healthcare.

Similar Products

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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.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

Pricing, Packaging & Availability

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Model
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Status
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  • Pre-Release: The model has not been released to general production, but samples may be available.
  • Production: The model is currently being produced, and generally available for purchase and sampling.
  • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
  • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
Package Description
The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
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.

Production Availability
This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

View PCN
This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

*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.