Locale Icon
English
  • Forums

    Popular Forums

    • LTspice
    • RF and Microwave
    • Video
    • Power Management
    • Precision ADCs
    • FPGA Reference Designs
    • Linux Software Drivers

    Product Forums

    • Amplifiers
    • Microcontrollers
    • Clock and Timing
    • Data Converters
    • Direct Digital Synthesis (DDS)
    • Energy Monitoring and Metering
    • Interface and Isolation
    • MEMS Inertial Sensors
    • Power Management
    • Processors and DSP
    • Switches/Multiplexers
    • Temperature Sensors
    • Voltage References
    View All

    Application Forums

    • A2B
    • Audio
    • Automated Test Equipment (ATE)
    • Condition-Based Monitoring
    • Depth, Perception & Ranging Technologies
    • Embedded Vision Sensing Library
    • Motor Control Hardware Platforms
    • Precision Technology Signal Chains Library
    • Video
    • Wireless Sensor Networks Reference Library

    Design Center Forums

    • ACE Evaluation Software
    • ADEF System Platforms
    • Design Tools and Calculators
    • FPGA Reference Designs
    • Linux Software Drivers
    • Microcontroller no-OS Drivers
    • Reference Designs
    • Signal Chain Power (SCP)
    • Software Interface Tools
    • System Demonstration Platform (SDP) Support
  • Learn

    Highlighted Webinar

    Simulation and Modeling: Tools for Reducing Risk and Getting to Market

    Models have the potential to accelerate engineers' design process, offering an interactive platform for using and evaluating products. A simulation model...

    Places

    • ADI Education Home
    • ADI Webinars
    • GMSL U
    • StudentZone (Analog Dialogue)
    • Video Annex
    • Virtual Classroom

    Libraries

    • 3D ToF Depth Sensing Library
    • Continuous-Wave CMOS Time of Flight (TOF) Library
    • Embedded Vision Sensing Library
    • Gigabit Multimedia Serial Link (GMSL) Library
    • Optical Sensing Library
    • Precision Technology Signal Chains Library
    • Software Modules and SDKs Library
    • Supervisory Circuits Library
    • Wireless Sensor Networks Library

    Latest Webinars

    • Design Smarter: Integrated Precision Signal Chains for Scientific Instrumentation
    • Simulation and Modeling: Tools for Reducing Risk and Getting to Market
    • Simplifying Connectivity - Remote Controlled (RC) Nodes in a Software Defined Vehicle (SDV)
    • Simplify High-Accuracy Instrumentation Design with Latest Precision Data Converters
    • Design High Performance Power Systems with Ultralow Noise Technology
    View All Webinars
  • Community Hub

    Challenge Yourself!

      KCC's Quizzes AQQ288 about an amazing Equations System

      1. First, the quote of the week: " The chief function of the body is to carry the brain around " - Thomas A. Edison 2. And here is the new challenge...

    View All

    What's Brewing

      Read a Blog, Take this Quiz for Another Chance to Win a Gift Card!

      Important: Read the blog first . The quiz questions are all based on the content from " Keeping Up with LTspice " so be sure to review it carefully before...

    View All

    Places

    • Community Help
    • Logic Lounge
    • Super User Program

    Resources

    • EZ Code of Conduct
    • EZ How To Help Articles
    • Getting Started Guide
    • ADI: Words Matter
    • Community Help Videos
    View All
  • Blogs

    Highlighted Blogs

    Corporate Clichés and the Intelligent “Analog” Edge

    What if the concept of the “Intelligent Edge” were made a little easier to understand? Einstein famously said, " If you can't explain it simply, you don...

     

    Keeping Up with LTspice

    I don't think I'm alone when I say: I love SPICE . Circuit simulation is no substitute for building and testing actual circuits, but simulation can be...

    Latest Blogs

    • GMSL Debugging: Detecting the Pixel Clock
    • When Signals Go South: Preventing Transceiver Failures with Fault Protection
    • Are Some Diagnostics Self-checking?
    • Future-Proof Your Network: Benefits of Integrating Cellular DAS Remote Access Unit: Part 3 of 4
    • Field Monitoring and the Continuous Pursuit of Functional Safety
    Read All Blogs

    ADI Blogs

    • EZ Spotlight
    • The Engineering Mind
  • ContentZone

    Visit ContentZone

    ContentZone

    Technical articles. Blogs. Videos. Your ADI content, all in one place.

    View ContentZone

    Featured Content

    Featured Content Title

    Blurb About Content

    View Content By Industry

    • Aerospace and Defense Systems
    • Automotive Solutions
    • Consumer Technology Solutions
    • Data Center Solutions
    • Energy Solutions
    • Healthcare Solutions
    • Industrial Automation Technology Solutions
    • Instrumentation and Measurement Solutions
    • Intelligent Building Solutions
    • Internet of Things (IoT)
    • Wireless Communication Solutions

    View Content By Technology

    • A2B Audio Bus
    • ADI OtoSense Predictive Maintenance Solutions
    • Dynamic Speaker Management
    • Gallium Nitride (GaN) Technology
    • Gigabit Multimedia Serial Link (GMSL)
    • Industrial Vision
    • Power Solutions
    • Precision Technology
    • RF
    • Security Solutions
    • Sensor Interfaces
    • SmartMesh
  • Partners

    Partner Forums

    • Boston Engineering
    • PalmSens
    • Richardson RFPD

    Partner Libraries

    • Calian, Advanced Technologies Library
    • Clockworks Signal Processing Library
    • Colorado Engineering Inc. (DBA CAES AT&E) Library
    • Epiq Solutions Library
    • Fidus Library
    • Tri-Star Design, Inc. Library
    • VadaTech Library
    • Vanteon Library
    • X-Microwave Library
EngineerZone
EngineerZone
MEMS Inertial Sensors
  • Log In
  • User
  • Site
  • Search
OR
Ask a Question
MEMS Inertial Sensors
MEMS Inertial Sensors
Documents ADXL103: Noise in accelerometer
  • Forums
  • Files
  • FAQs/ Docs
  • Members
  • Tags
  • More
  • Cancel
  • +Documents
  • +3-D Model/STEP: FAQ
  • +AD22282-A-R2: FAQ
  • +ADIS16000: FAQ
  • +ADIS16003 MTBF: FAQ
  • +ADIS16006: FAQ
  • +ADIS16201: FAQ
  • +ADIS16203: FAQ
  • +ADIS16204: FAQ
  • +ADIS16209: FAQ
  • +ADIS16210: FAQ
  • +ADIS16223: FAQ
  • +ADIS16227: FAQ
  • +ADIS16228: FAQ
  • +ADIS16229: FAQ
  • +ADIS16240: FAQ
  • +ADIS16255: FAQ
  • +ADIS16355: FAQ
  • +ADIS16364: FAQ
  • +ADIS16365: FAQ
  • +ADIS16375: FAQ
  • +ADIS16385: FAQ
  • +ADIS16400: FAQ
  • +ADIS16405: FAQ
  • +ADIS16407: FAQ
  • +ADIS16445: FAQ
  • +ADIS16448: FAQ
  • +ADIS16460: FAQ
  • +ADIS16475: FAQ
  • +ADIS16477: FAQ
  • +ADIS1647x: FAQ
  • +ADIS16480: FAQ
  • +ADISUSB: FAQ
  • +ADXL001: FAQ
  • +ADXL203: FAQ
  • +ADIS16300: FAQ
  • +ADIS16485: FAQ
  • +ADIS16488: FAQ
  • +ADIS16488A: FAQ
  • +ADIS16490: FAQ
  • +ADIS16495: FAQ
  • +ADIS16497: FAQ
  • -ADXL103: FAQ
    • ADXL103/203 Accelerometer sensitivity
    • ADXL103/ADXL203 Sensitivity over frequency
    • ADXL103: ADXL203
    • ADXL103: Noise in accelerometer
    • ADXL103: Root cause of temperature drift component
    • Tilt sensing MEMs performance requriement
  • +ADXL150: FAQ
  • +ADxL193: FAQ
  • +ADXL202: FAQ
  • +ADXL206: FAQ
  • +ADXL210: FAQ
  • +ADXL210E: FAQ
  • +ADXL213: FAQ
  • +ADxL230: FAQ
  • +ADXL278: FAQ
  • +ADXL312: FAQ
  • +ADXL313: FAQ
  • +ADXL320: FAQ
  • +ADXL321: FAQ
  • +ADXL322: FAQ
  • +ADXL327: FAQ
  • +ADXL335: FAQ
  • +ADXL337: FAQ
  • +ADXL345: FAQ
  • +AD22290: FAQ
  • +ADIS16003: FAQ
  • +ADIS16133: FAQ
  • +ADIS16135: FAQ
  • +ADIS16265: FAQ
  • +ADIS16305: FAQ
  • +ADXL326: FAQ
  • +ADXL350: FAQ
  • +ADXL362: FAQ
  • +ADXL375: FAQ
  • +ADXL377: FAQ
  • +ADXL78: FAQ
  • +ADXRS150: FAQ
  • +ADXRS290: FAQ
  • +ADXRS300: FAQ
  • +ADXRS401: FAQ
  • +ADXRS453: FAQ
  • +ADXRS610: FAQ
  • +ADxRS614: FAQ
  • +ADXRS623: FAQ
  • +ADXRS646: FAQ
  • +ADXRS652: FAQ
  • +ADXRS800: FAQ
  • +ADIS16136: FAQ
  • +ADIS16137: FAQ
  • +ADIS16266: FAQ
  • +ADIS16334: FAQ
  • +ADIS16362 Evaluation Tool: FAQ
  • +ADIS16364 Evaluation Tool: FAQ
  • +ADIS16367: FAQ
  • +ADIS163xx: FAQ
  • +ADIS16489: FAQ
  • +ADIS1648x: FAQ
  • +ADXL346: FAQ
  • +ADXL363: FAQ
  • +EVAL-ADIS: FAQ
  • +EVAL-ADIS2: FAQ
  • +Filtering Functions: FAQ
  • +General: FAQ
  • +Gyroscope: FAQ
  • +Hard & Soft Iron Correction: FAQ
  • +ISEB USB: FAQ
  • +IMU: FAQ
  • +MEMS: FAQ
  • +Slip Ring Interface: FAQ
  • +SPI Troubleshooting: FAQ
  • +TEMP_OUT Variation: FAQ
  • +Test Procedures: FAQ
  • +AD590: FAQ
  • +AD5940: FAQ
  • +ADUCM355: FAQ
  • +ADXL357: FAQ
  • +ADXL367: FAQ
  • +CN0429: FAQ
  • DS1922E: FAQ
  • +DS1922L: FAQ
  • +DS1922T: FAQ
  • +EVAL-ADXL312-SDP: FAQ
  • +MAX30003: FAQ
  • +MAX30003WING: FAQ
  • +MAX30009EVKIT: FAQ
  • +MAX30134EVSYS: FAQ
  • +TMP01: FAQ

ADXL103: Noise in accelerometer

Q 

We are currently using some of your accelerometers to measure subsea pipe
motions for offshore applications (extremely small motion amplitude ~ 0.01 m
and reasonably low frequency 0.03 Hz). I have a few questions regarding your
accelerometer's specifications, and would be most grateful if you could respond
to my queries as soon as possible.

Take ADXL105 for example,

Resolution 2 mg - what does this really mean? Is it possible to measure
accelerations smaller than this?

Noise floor is 225 ug (Hz)^0.5? How is this defined and obtained? We measured
the noise of the accelerometer in time domain when it is stationary and worked
out the amplitude spectrum using DFFT. Is the noise floor defined as the
magnitude of this white-noise spectrum.

In your technical note (Rev.A), this is an expression for calculating rms noise
from the noise floor level.

What is then the relationship between resolution and rms noise?

 

A 

A resolution of 2mg means that, given the noise level of 225ug/rtHz, you can
realistically reduce the noise by filtering to such an extent that you can
determine the acceleration to 2mg. The p-p acceleration noise is about 6.6x the
rms value (this gives a statistical probability that the signal is within this
range for 99.9% of the time. Therefore if you filter to 1Hz with a single pole
filter you have 225ug x 1.6 = 360ug rms noise which is 2.376mg peak-to-peak
noise. 2mg is an approximation of the resolution you can reasonably achieve
using the device.

By digital filtering after the accelerometer you can get better resolution at
the expense of longer response time.

The noise spectral density is 225ug/rtHz - integrate this over the noise
bandwidth of interest to get the rms noise.

The ADxL103 has a noise spectral density of 110ug/rtHz - about half of the
ADxL105. But it also has a lower full scale so the dynamic range is a bit less.

Tags: adxl103
  • Share
  • History
  • More
  • Cancel
analog-devices logo

About Analog Devices

  • Who We Are
  • Careers
  • Newsroom
  • What We Do (Signals+)
  • Investor RelationsExternalLink
  • Quality & Reliability
  • Sales and Distribution
  • What's New on Analog.com
  • Contact Us

Find Help

  • Support
  • Resources
  • WikiExternalLink
  • Analog Dialogue
  • ADI Developer PortalExternalLink

myAnalog

Interested in the latest news and articles about ADI products, design tools, training, and events?

Go to myAnalog
  • Instagram page
  • Twitter page
  • Linkedin page
  • Youtube page
  • Facebook
  • Legal and Risk
  • Accessibility
  • Privacy Policy
  • Privacy Settings
  • Cookie Settings

©2025 Analog Devices, Inc. All Rights Reserved

analog-devices

About Analog Devices

Down Up
  • Who We Are
  • Careers
  • Newsroom
  • What We Do (Signals+)
  • Investor RelationsExternalLink
  • Quality & Reliability
  • Sales and Distribution
  • What's New on Analog.com
  • Contact Us

Find Help

Down Up
  • Support
  • Resources
  • WikiExternalLink
  • Analog Dialogue
  • ADI Developer PortalExternalLink

myAnalog

Interested in the latest news and articles about ADI products, design tools, training, and events?

Go to myAnalog
Instagram page Facebook Twitter page Linkedin page Youtube page
  • Legal and Risk
  • Accessibility
  • Privacy Policy
  • Privacy Settings
  • Cookie Settings

©2025 Analog Devices, Inc. All Rights Reserved