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- Understand When and Why System Reliability Matters
- How Signal-Chain ICs Form Foundation for Smart-Grid Equipment
- Can Wearable Health Technology Pinpoint Disease Onset?
- How to Get 20% More Battery Life for Your Wearables and IoT Designs
- Is Your Wearable Equipped to Support Remote Patient Monitoring?
- Biosensors Detect Sleep Apnea Via Wearable, Home-Based Test
- Tips to Achieve Faster Design of USB-C Power Solutions
- Wearable Flags Health Changes in Seniors Via Biosensors and Predictive Analytics
- Simplify Your PLC Design with a Digital I/O IC
- Here’s an Easier Way to Keep Your IoT Devices Safe from Hackers
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- Power Up Internal Circuits While Simplifying Diagnostics for Signal Monitoring Applications
- Why Hardware-Based Cryptography Offers Stronger IoT Design Protection
- High-Speed Serial Links for High-Performance ADAS Solutions
- Crafty Engineers Create COVID-19 Monitoring Devices with Arduino Boards and Maxim ICs
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- Get More System Power Protection for Less
- When Smarter Gets Smaller, Only a Dual-Core Micro Will Do
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- Can a Supercapacitor Replace Your Battery for Backup Power
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- Why Embedded Systems Designers Should Care About OpenSSL
- Balancing Power Demands of High-Voltage Automotive Power Applications
- PUF Technology Protects Against Invasive Attacks
- Safer Electric Vehicles Start with a Fast, Accurate Battery Management System
- Simplify Vehicle Head Unit Design with Maxim’s Radio Tuner Solution
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- A Smarter Way to Design Touchscreens
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- Ultra-Small Wearable Healthcare Design Platform
- Vision Realized in Advancing Industry 4.0 Solutions
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- embedded world 2017
- Engineering is for Dummies
- See & Hear Maxim Technologies at Mobile World Congress
- Keeping Cars Safe and Reliable Via ISO 26262 Certification
- Fast (But Not Too Fast) Op Amps for Reliable Very Low-Power Systems
- Shade-Proof Your Solar with Maxim Solar Cell Optimizers
- How Machine Learning Can Speed Up Your Design Cycle
- MakeWithMaxim Design Contest
- To IO-Link and Beyond!
- How 3D Printers Help You Evaluate ICs
- Optical Networking Technologies OFC 2017
- How You Can Help Bring 20.8 Billion Connected Things Into the World
- Reference Designs Go Beyond the IC, Become Complete Systems
- Industry 4.0 is Coming on Strong, and Analog Integration is a Major Beneficiary
- Putting the power of Industry 4.0 in your Pocket
- Battery fuel gauge ICs do more
- Reference Designs: Game Changers for Complex Projects
- Why Hackers Can’t Wait to Get Into Your New Car
- Your Home Might Be Smarter—But How Secure Is It from Hackers?
- What’s Your Favorite IoT Platform? Vote Today!
- Achieving Fast, Accurate Fault Detection on Smart Electricity Grid
- Fitness/Wellness Wearables Reference Design Saves Development Time and Effort
- Simplifying Design of Pulse Rate/Blood-Oxygen Wearables
- Don’t Design the Next Useless IoT Gadget
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- Reducing Component Count in Factory Automation Applications
- Maxim Highlights Auto, Wearable Healthcare Tech at CES
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- Future Engineers Make with Maxim at Yale’s YHack Hackathon
- Interesting Inventions Inspire Ingenuity
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- Proximity Sensing Made Easier
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- Eat Pie and Win a Dev Board
- Why System Monitoring ICs Are Good Analog Insurance
- Who is nanoMan?
- Why Now Is the Time to Consider Wired Interface Solutions
- Get to Market Quickly with Your Secure Wearable Health Designs
- Why Powerline Communications is Great for Noisy Industrial Environments
- How Factory Automation Can Support Reshoring
- Don’t Become the Next Hacking Headline
- One Smart Design: Low IQ Boost Converter
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- Reduce Calibration Costs for Industrial Process Control
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- We Love Startups! Let Us Help You Prototype Quickly
- Safeguard IoT Designs with Holistic Approach to Security
- Surprising Facts About the Cost to Operate Your Electric Car
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- Webinar: Learn Why It’s Smart to Have a Low IQ
- Why Sensors Are the Next Big Thing
- Building a Self-Balancing Robot with Feature-Rich Featherboard
- Helping You Create Rugged, Long-Lasting Mil/Aero Designs
- Why You Can’t Afford to Overlook Design Security
- Why Iso-Buck Converters Are Better than Flyback Converters
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Reference Designs
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Design Tools and Models
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Package Materials
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Technical Documents
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Cross-Reference Search
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Partners and Technology
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mgineer Blog
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Understand When and Why System Reliability Matters
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How Signal-Chain ICs Form Foundation for Smart-Grid Equipment
-
Can Wearable Health Technology Pinpoint Disease Onset?
-
How to Get 20% More Battery Life for Your Wearables and IoT Designs
-
Is Your Wearable Equipped to Support Remote Patient Monitoring?
-
Biosensors Detect Sleep Apnea Via Wearable, Home-Based Test
-
Tips to Achieve Faster Design of USB-C Power Solutions
-
Wearable Flags Health Changes in Seniors Via Biosensors and Predictive Analytics
-
Simplify Your PLC Design with a Digital I/O IC
-
Here’s an Easier Way to Keep Your IoT Devices Safe from Hackers
-
Buck vs. Boost Converters: How Do They Compare
-
Power Up Internal Circuits While Simplifying Diagnostics for Signal Monitoring Applications
-
Why Hardware-Based Cryptography Offers Stronger IoT Design Protection
-
High-Speed Serial Links for High-Performance ADAS Solutions
-
Crafty Engineers Create COVID-19 Monitoring Devices with Arduino Boards and Maxim ICs
-
Download App for Essential Analog IC Information On-the-Go
-
Get More System Power Protection for Less
-
When Smarter Gets Smaller, Only a Dual-Core Micro Will Do
-
Two Beautiful Ways to Measure Temperature
-
Understand and Address Threats to Cryptographic Systems
-
Can a Supercapacitor Replace Your Battery for Backup Power
-
What Can You Create with Frequency Synthesizers?
-
How Fast and Safe Will 5G Wireless Networks Be
-
These Industrial Communications ICs are Oldies but Goodies for Good Reason
-
DIY Engineering Projects for Your Valentine
-
Why Embedded Systems Designers Should Care About OpenSSL
-
Balancing Power Demands of High-Voltage Automotive Power Applications
-
PUF Technology Protects Against Invasive Attacks
-
Safer Electric Vehicles Start with a Fast, Accurate Battery Management System
-
Simplify Vehicle Head Unit Design with Maxim’s Radio Tuner Solution
-
Moving Toward Value-Based Healthcare Using Wearables and Patient-Generated Data
-
A Smarter Way to Design Touchscreens
-
Want to Avoid Counterfeiting?
-
Ultra-Small Wearable Healthcare Design Platform
-
Vision Realized in Advancing Industry 4.0 Solutions
-
Solving EMI Challenges in LED Headlamps
-
embedded world 2017
-
Engineering is for Dummies
-
See & Hear Maxim Technologies at Mobile World Congress
-
Keeping Cars Safe and Reliable Via ISO 26262 Certification
-
Fast (But Not Too Fast) Op Amps for Reliable Very Low-Power Systems
-
Shade-Proof Your Solar with Maxim Solar Cell Optimizers
-
How Machine Learning Can Speed Up Your Design Cycle
-
MakeWithMaxim Design Contest
-
To IO-Link and Beyond!
-
How 3D Printers Help You Evaluate ICs
-
Optical Networking Technologies OFC 2017
-
How You Can Help Bring 20.8 Billion Connected Things Into the World
-
Reference Designs Go Beyond the IC, Become Complete Systems
-
Industry 4.0 is Coming on Strong, and Analog Integration is a Major Beneficiary
-
Putting the power of Industry 4.0 in your Pocket
-
Battery fuel gauge ICs do more
-
Reference Designs: Game Changers for Complex Projects
-
Why Hackers Can’t Wait to Get Into Your New Car
-
Your Home Might Be Smarter—But How Secure Is It from Hackers?
-
What’s Your Favorite IoT Platform? Vote Today!
-
Achieving Fast, Accurate Fault Detection on Smart Electricity Grid
-
Fitness/Wellness Wearables Reference Design Saves Development Time and Effort
-
Simplifying Design of Pulse Rate/Blood-Oxygen Wearables
-
Don’t Design the Next Useless IoT Gadget
-
Exactly What the Doctor Ordered: Cars that Monitor Their Own Health and Yours
-
Reducing Component Count in Factory Automation Applications
-
Maxim Highlights Auto, Wearable Healthcare Tech at CES
-
Cut 6 Months Off Health Application Design Cycle
-
Future Engineers Make with Maxim at Yale’s YHack Hackathon
-
Interesting Inventions Inspire Ingenuity
-
Ants Have Their Own Smart Cities—Why Can’t We?
-
Proximity Sensing Made Easier
-
Get Longer Battery Life By Lowering Quiescent Current
-
Eat Pie and Win a Dev Board
-
Why System Monitoring ICs Are Good Analog Insurance
-
Who is nanoMan?
-
Why Now Is the Time to Consider Wired Interface Solutions
-
Get to Market Quickly with Your Secure Wearable Health Designs
-
Why Powerline Communications is Great for Noisy Industrial Environments
-
How Factory Automation Can Support Reshoring
-
Don’t Become the Next Hacking Headline
-
One Smart Design: Low IQ Boost Converter
-
A Look at the Future of Wearable Healthcare Design
-
Camera Interfaces Critical to ADAS System Design
-
Reduce Calibration Costs for Industrial Process Control
-
Making Smart Energy Even Smarter Via nanoPower Technology
-
We Love Startups! Let Us Help You Prototype Quickly
-
Safeguard IoT Designs with Holistic Approach to Security
-
Surprising Facts About the Cost to Operate Your Electric Car
-
Keeping Hackers Away from Your POS Terminals
-
Webinar: Learn Why It’s Smart to Have a Low IQ
-
Why Sensors Are the Next Big Thing
-
Building a Self-Balancing Robot with Feature-Rich Featherboard
-
Helping You Create Rugged, Long-Lasting Mil/Aero Designs
-
Why You Can’t Afford to Overlook Design Security
-
Why Iso-Buck Converters Are Better than Flyback Converters
-
Learn Ways to Improve Power Efficiency—Free Seminar
-
Are Machines Taking Over?
-
Are You Doing Enough to Build Trust in Our Connected World?
-
Aggies Invent: 48 Hours from Idea to Prototype
-
IoT World: From IoT Patterns to Blockchain Security
-
Building the Self-Aware Digital Factory
-
Flexound Systems Brings Immersive Dimension to Music
-
Better Battery Runtimes Without Characterization
-
Driving Greater Performance and Safety from Advanced Automotive Lighting
-
How Secure ICs Protect Data in Transit in IoT Devices
-
Learn 3 Key Ways to Lock In Security for Your IoT Design
-
Recloser Controllers Maintain Smart Grid Uptime
-
Operate Your Design from a Single Battery, with the Right Converter
-
Show Your Engineering Ingenuity in Summer of Love Contest
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SDR Baseband Processing—Flexibly and Cost-Effectively
-
Embedded Security ICs Safeguard PCs and Payments
-
Want Your Oven to Play Your Favorite U2 Song?
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Choosing the Right Power Management ICs for Automotive Designs
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Designing Hearables? Tiny PMICs Boost Battery Life
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Designing Accurate, Wearable Optical Heart Rate Monitors
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Maxim Interns Showcase Summer Projects
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Protect Your Medical Device Endpoints with Secure Authenticators
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Are Your Power Supplies Doing the Job?
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Tesla Switching to PMAC Synchronous Drive Motor for Model 3
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3 Cool Technologies for Virtual Healthcare
-
nanoMan Says: Use This Power Design Simulation Tool
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How Fast Can You Solve This Crossword Puzzle?
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Why Not Design a Smaller PLC?
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5 Blog Posts You Don’t Want to Miss
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Q&A: Maxim's Randall Wollschlager on Designing the Future Car
-
Simplify Power Circuit Design with Simulation
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How Medical Wearables Enhance Quality of Life
-
IO-Link Handbook Presents Primer on Designing Sensors and Masters
-
ELIV 2017: Learn Ways to Design Safer, Smarter Cars
-
Infomart Creates Tiny Power-over-Ethernet Devices
-
Advancing Safety and Infotainment for Cars of Today and the Future
-
How PA Linearization Solves Key Challenge for Remote PHY Fiber Nodes
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What It Takes to Deliver Safer, Smarter Cars
-
Many Technologies Are Vying for Your IoT Wide Area Network Design
-
Are Your IoT Devices Immune to Cyberattacks?
-
Machine Learning Club Drives Data Science Demand
-
Designing Tiny, Connected Products? Don’t Miss this Webinar
-
How Factory Automation Can Support Reshoring
-
How Can We Create One Trillion Connected Devices?
-
Modular System Speeds Up IoT Design Cycle
-
Keep Designs Cool with a Tiny, Low-Power Temperature Sensor
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Circuit Protection You Might Not Have Thought About
-
You Can’t Steal a Key that Isn’t There
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See Demos of Turnkey Security ICs at TRUSTECH
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Synchronous Switching Regulators: Talk Time or Standby Time?
-
5 Ways Solar Power Usage Will Change By 2037
-
What Kind of World Will One Trillion Connected Devices Produce?
-
Can We Fix the Cybersecurity Mess?
-
Three Great Personal Gadgets for Engineers
-
Secure TLS in Connected Devices with a Companion Security IC
-
Are There One Trillion Things to Connect?
-
Maxim to Demo High-Speed SerDes Links and More at CES 2018
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Achieve Precision Control of Vibration for Wearables
-
Secure Microcontrollers Safe from Spectre and Meltdown Flaws
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How to Stop an Invasive Attack on Your Design
-
Smaller, Lower Power 4-20mA Sensor Transmitters for Industrial Equipment
-
Prevent Battery Counterfeiting with Secure Fuel Gauges
-
Applying Peak Current Mode Control for High Performance in Switching Regulators
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The Story Behind the iButton
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Meeting Big Demands for Power in Small Devices
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The Jedi Master – Cyber-Physical Systems and Industrial Convergence
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A Quick Look at Using NFC to Protect Your System
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Get Technical Tips from Maxim in the Lab Videos
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How to Use Your Battery Fuel Gauge to Build Customer Trust
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Sustaining the IoT—What Will This Take?
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With Reference Designs, No Need to Reinvent the Wheel
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How a Software Isolation Solution Protects IoT Devices
-
AM Radio in Your Electric Vehicle? Not Always
-
Get Technical Tips from Maxim Unfiltered Videos
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Wirelessly Charge Your Next Design
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How Digital Health Technologies Enable Better Preventive Care
-
A Look at the Latest Battery Technology from Tesla
-
#MakewithMaxim Inspires Engineering Inventiveness
-
Extend Vehicle Driving Range with Accurate Battery Management System
-
Plug-and-Play Power in a Compact Package? You've Come to the Right Place
-
Powering Motor Encoders and Resolvers
-
Kids Invent Their Future at Upcoming Invention Convention
-
Catch this Webinar If You're Designing Hearables and Wearables
-
Flow Battery Technologies for Utility-Scale Systems
-
High-Speed Serial Links for ADAS and Infotainment
-
Got an IoT Design Idea? Enter Our Contest
-
Powering WiFi This and WiFi That
-
Meet DARWIN, a New Breed of Microcontrollers for the IoT
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Which Type of Analog Hero Are You?
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How Security ICs Address New Medical Device Regulations
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Deminar: 3 Ways that Analog ICs Can Strengthen Your Design
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On-Demand Webinar: Hardware Security with PUF Technology
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The Beauty of Precision Op Amps
-
Kid Inventors Showcase STEM Skills at California Invention Convention
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How iButton Can Enhance Food Quality
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Why Your Audio DAC or Digital Amp Should Spec Dynamic Range Instead of SNR
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Increase Motion Control System Accuracy with Higher Performance RS-485 Transceivers
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Designing Secure, Scalable Contactless Payment Systems
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High-Bandwidth Serial Links for Safer Cars
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Keeping an Eye on Battery SOC in Wearables and Hearables
-
Get High-Speed USB Port Protection for Industrial Voltages
-
Don’t Worry – Isolate All Those Digital Signals
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Keep Tabs on Essential Electronic Loads with Supervisory ICs
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Optical Sensing Opens New Opportunities in Healthcare
-
LED Bulb Inspires Creation of Maintenance-Free Cybernetic House
-
A Better Listening Experience Starts with the Right Stereo Audio Codec
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Quieting the Noise: Meeting EMI Standards in Power Supply Designs
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Making Sweet Music with Raspberry Pi
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Putting Intelligence in the IoT
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Got a Wearable Health Design Idea? Here’s How to Make It Accurate
-
What Will You Create with Optical Biosensors?
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How Can We Power Our Invisible Intelligence?
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What Can GPS Do for Your Design?
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Keeping the IoT Safe from Hackers
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Idea to IoT Product in Just Days? Talk to zGlue
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Regulate Car Battery Voltages for ADAS Applications
-
Open-Source Framework Detects Memory Corruptions in Embedded Software
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Stop Straining Your Portables—Refine Your Power Strategies
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Choosing the Best Types of Temperature Sensors
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How to Stop Physical Tampering of Mobile POS Systems
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Summertime Fun Outside the Classroom
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Do You Trust Your Smart Medical Device?
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Can You Create an Energy-Efficient VR Headset?
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nanoMan Meets DARWIN—and Powerful Things Happen
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Consider Your WLAN Power-Supply Temperature and PCB Size Carefully
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Why on Earth Don’t You Include a Clock in Your Design?
-
Reinforced Digital Isolator Ensures Safety in Industrial Environments
-
CAN Bus Continues Its Grand Popularity – in Automotive, IoT, and Automation
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Who Had the Winning Project in Our MAX32620FTHR Design Contest?
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Reaching for the Golden Ring: 4 Key Elements for Industrial Convergence
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4 Ways to Extend Runtime of Small, Battery-Powered Electronics
-
How Are You Managing Thermal Requirements of Shrinking Industrial Sensors?
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Accurate, Wrist-Based Heart-Rate Monitoring—Six Months Faster
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Getting a Finger on the Pulse of Well-Being
-
LED Controllers Make Headlight System Design a Snap
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Smaller, Smarter, and More Powerful ICs—It’s All at electronica 2018
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Managing Low and High LED Currents for Matrix and Pixel Lighting
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An Ideal Diode Can Be an Engineer’s Best Friend
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Bring Intelligence to the Edge of the Digital Factory
-
7 Key Steps to Empowering Innovation
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Empowering Secure PIN-on-Glass Payments at TRUSTECH 2018
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Engineering Intern Creates Heat-Sensing Robot with LoRa Technology
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So Many Smart Devices, So Many Security Vulnerabilities
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Why Embedded Systems Designers Should Care About OpenSSL
-
CES 2019 Preview
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Secure Authenticators Protect Artificial Pancreas
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A Simple Way to Increase Factory Uptime
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Simpler, More Efficient Secure Companion ICs for the IoT
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Secure Provisioning Platform Makes It Easier to Protect IoT Designs
-
University Students Gain Industry 4.0 Experience with Smart Factory Demo
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Want Traffic Updates from Your Toilet?
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Want Your Battery-Powered Devices to Run Longer? Here’s How.
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Why Embedded Systems Designers Should Care About OpenSSL
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5 Cool Gadgets that Engineers Might Want to Unwrap
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An Insider's View of Analog Artistry at electronica 2018
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One Way to Replace Power Rail Clusters in Small Electronic Devices
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Engineers Had Better Be Careful with Algorithms and AI
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Makers Make the Most of Analog ICs
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Get Inspired to Think Big and Design Small
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How LED Backlight Drivers Enable Bigger, Higher Resolution Automotive Displays
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How IoT Sensors Help Ensure Freshness and Quality of Perishables
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Fish Tanks Don’t Need Security—Unless They’re Part of the IoT
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How Manufacturing Systems Can Evolve to Enable the Industrial IoT
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Committed to a Smarter, More Sustainable Future
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Squeeze More Out of Your Portable Electronics
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Cook Up Something Yummy for Pi Day
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Happy Birthday, James Kirk
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Using Optical Sensors to Detect Particles
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You Be the Judge of Creative Student Inventors
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Maxim Is Going to the Dogs in 2020
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Designing for USB-C Just Got Easier
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Tiny, Power-Efficient IO-Link Transceiver for IIoT Designs
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How Ceramic Voltage References Enhance Long-Term Drift Performance
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What’s Needed to Implement Today’s Industrial IoT Architecture
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How Security Supervisors Safeguard IoT Devices
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On-Demand Webinar: Your FPGA Design Starts with the Right Power Supply
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Tips for Choosing Precise, Power-Efficient GNSS Receivers for Location-Based Applications
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Digital Instrument Clusters: Why Functional Safety is Important
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Channel Your Engineering Ingenuity for Star Wars Day
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How Will the Industrial IoT Architecture Evolve
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New Power Management Design Guides for Smart Buildings and Smart Factories
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Get Better Performance from Your ADAS Camera Systems
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How to Save Time and Space with Power Supply Designs
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Reference Designs: Designed, Built, and Tested—So You Won’t Have To
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Understand How Physically Unclonable Function Technology Can Benefit Your Design
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Meet Vehicle Emissions Standards with Supervisory and Watchdog-Timer ICs
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How to Derive More System Efficiency from Battery-Powered Designs
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Higher Throughput at Lower Cost for Semiconductor Testing
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Want to Protect Your USB Port Without Slowing It Down?
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Sensors Expo: See Wearable Healthcare Technologies in Action
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4 Reasons to Register for a Free Design Startup Pack
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How to Efficiently Power Tiny Industrial Sensors
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Don’t Go Breaking Your Heart to Add ECG to Your Wearable
-
What You Need to Know About Battery Management Challenges
-
System Loads Are No Match for This Current-Sense Amplifier
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Power Conversion Efficiency for Portable Designs
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Why Authenticators SHOULD be THE Key to Your Smart Lock
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Can Wearables Get People Off the Couch
-
How Dynamic Voltage Scaling Saves Power in Wearables
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Can Wearables Reduce Healthcare Costs?
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How to Get Louder, Richer Sound from Micro Speakers
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When Is a Digital Output Not Just a Digital Output? When It’s Also a Digital Input!
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3 Reasons to Use a Discrete Real-Time Clock in Your Wearable Design
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How Secure Authenticators Prevent Counterfeiting of Medical Disposables
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How to Minimize Power in Clocking Applications
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Are Sensor Clones Stealing Away Your Customers?
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Maxim Summer Interns Showcase Their Technical Talents
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What’s Driving Industry 4.0?
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Breakout Boards Give You a Head Start on Your Design
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RS-485 Just Got a Major Stamina Boost!
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Why Shrinking Sizes of RTCs Is Good News for Your Portable Designs
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The Ins and Outs of Voltage Supervisor ICs
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See If You Can Steal These Keys
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How Power Management ICs Support Smart Buildings
-
How Analog ICs Fuel Wireless IoT Sensors
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Drive HB LEDs to Brighter Heights for Automotive Applications and More
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nanoPower Technology Translates into Happy Users
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Smartphone for Seniors Gets Smarter with Health Monitoring
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Deliver Accurate Battery SOC Data from Your Wireless Android Headphones
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Like a Good Wine, These Industrial Communications ICs Get Better Over Time
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5 Ways a MyMaxim Account Enhances Productivity
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Simple Yet Effective – Never Underestimate the Usefulness of the Humble Comparator!
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Look Ma, the Battery Has Wheels!
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How to Safely Demagnetize Your Inductor When Using Switching Inductive Loads
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Are Your Car Battery Packs in Danger of Failing?
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How an Old Digital Dog Can Learn New Analog Tricks
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CCCamp Badge is More than an Entry Ticket – It’s a Sensor-Rich Reference Design
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5 Ways a MyMaximAir Guitar Gets Real with These Electronic Instruments Account Enhances Productivity
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Stress Your Power Supply, Not Yourself
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How to Drive Micro Speakers to Their Maximum Power Rating
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How to Get Accurate In-Ear Heart-Rate and SpO2 Monitoring
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Scare Up Some Electronic Tricks and Treats This Halloween
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How Wearables Can Become a More Integral Part of Healthcare
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Why Long Battery Life is the Lifeblood of Thread IoT Sensors
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Keep Perishables Safe with Reliable Temperature Monitoring
-
Ask Michael: How Do I Make My High-Current Sensor IO-Link Compatible?
-
PUI Audio Delivers Clean, Clear Sound from Tiny Speakers
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How Analog ICs Support Seismic Signal Detection
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Reference Designs with ECAD Files Mean Faster Circuit Design
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How GSEE-TECH Cut 6 Months from Analog Input Module Development Cycle
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3 Ways an Integrated Bio-algorithm Sensor Hub Simplifies Wearable Designs
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Intelligent Buildings Get Smarter and Smarter
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Why New ICs Are Needed to Bring Intelligence to the Edge
-
Learn How You Can Design a Power Supply in 5 Minutes
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Ask Michael: Swipe Right for the Isolated Gate Driver That’s a Perfect Match for GaN/SiC Switches
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Experience Wireless Battery Management at CES 2020
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Can Wearables Help Prevent the Silent Killer?
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Holiday Gift-Giving Guide: 5 Hot Tech Gadgets for Engineers
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Simplify System Power Design for Your Automotive Displays
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Add Diode ORing Without Losing Efficiency
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Function-Rich Diving Computer Fueled by Analog and Power Management ICs
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Getting to Reliable Sensor Data: Interaction Between Electronics, Optics, and Mechanical Design
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Calterah Semiconductor Delivers High-Performance, Power-Efficient mmWave Radar Tech
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Your Guide to the Advantages of Pack-Side Fuel Gauging
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How to Extend the Life of Your Smart Factory’s Wireless Beacons
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Uber Driverless Cars, AI and IoT at CES 2020
-
Power Up Internal Circuits While Simplifying Diagnostics for Signal Monitoring Applications
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Digital Input Design
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Location-Tracking Chip IoT Designs
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See How Click Boards Make It Quick to Evaluate Real Time Clock ICs
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Multichannel ADC Accuracy for Accurate Sensing
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Future of Industrial Automation Demos at Embedded World
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Complete Wrist-Based Heart-Rate SpO2 Sensor Reference Design
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How to Create Accurate Performance-Tracking Sports Wearables
-
Robust NAND Flash Wafer Testers Rely on Low-Power ATE Drivers
-
Quickly Simulate DC-DC Converters with SIMPLIS-Based Tool
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Tips for Achieving Efficient AC Motor Drive System Design
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Guide to LiDAR Sensors for Self-Driving Cars
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Analog PAM4 Chipset in Hyperscale Data Centers
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Are Biometric Sensors the Key to Healthier Horses…and Humans?
-
Keep Hackers’ Hands Off Your Battery Packs
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Psst…This Fitness Wearable Tells You Your Body’s Secrets
-
ASIL-Grade Camera Power Protector Safeguards Your Car Cameras
-
CES 2020: The Power Behind Robotics
-
Is Pulse Transit Time Needed for Accurate Blood-Pressure Monitoring from Wearables?
-
Need to Design Small, Reliable Earbuds in a Hurry? Sometimes It Pays to Play It Cool…
-
MediaTek Taps Into GMSL SerDes Technology for Automotive Infotainment Solution
-
How Analog Devices Are Enhancing LUXROBO’s IoT and Robotics Development Platform
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Say “No More” to Tedious Calculations for E Series Values
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How Secure Authentication Protects Your Automotive Designs from Counterfeiting
-
How NCATEST Raised Performance and Lowered Power of Its Automated Test Equipment
-
Ensuring Employee Safety During an Unprecedented Time
-
How LiDAR Delivers Critical Distance-Sensing for Self-Driving Cars
-
Why Does It Take a Pandemic to Realize the Value of Remote Patient Monitoring?
-
What’s in Photoplethysmography Data? A Look at the Interaction Between Sensor Performance and Algorithms
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Charging Your Car’s Battery – in 1898
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Prioritizing Customer Focus to Save Lives
-
How Capacitors Provide a Window into the Real Value of a Battery
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What’s All the Fuss About Cryptography?
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Safeguard Smart Medical Devices for Enhanced Patient Safety
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Making a Difference in the Global Fight Against COVID-19
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How iButton Devices Facilitate Electric Car Safety
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how a small schottky diode minimizes noise in synchronous converters
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Understand the Multiphase Buck Voltage Regulator Advantage
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Answering the Call to Help Maxim Integrated Customers Innovate in Our New World
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Philips RDT Relies on RTC to Keep Remote Patient Monitoring Device on Schedule
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Philips RDT Relies on RTC to Keep Remote Patient Monitoring Device on Schedule
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The Keys to How Modern Cryptography Keeps Transactions Safe
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HollySys Creates Small, Efficient Industrial Automation Solutions
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How Cryptographic Algorithms Protect Embedded Designs
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Virtual Sensors Show Brings Latest Technologies to You
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How Performance at the Edge Drives Smarter Manufacturing
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Don’t Get Cold Feet from Your ASIL B and Cold-Crank Specifications
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How Soundmatters Is Making Small, Portable Speakers Sound Better
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How Miromico Designed the Industry’s Smallest LoRaWAN Module for the IoT
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What Makes PUF Technology One of the Best Protections in Cryptography?
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Extend the battery life of your vehicle tracker/asset tracker/IoT device 10-fold with Maxim’s ultra-low power GPS solution
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What Makes Cryptography Easier? Secure Authenticators and Coprocessors
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How Being Bold Brings Smart Automation Solutions
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The Dawn of the Self-Aware Machine
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On the Go Vital Monitoring and Gaming Platform
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Can We Find Common Ground on Common Mode Range?
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Slash Power Dissipation with Maxim’s Industrial Protected Low-Side Digital Output Solution
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Assistant Excellence Conference - It Takes Two
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Two Tools to Ease Inductor Selection
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More nanoPower technology™ tools for your toolkit
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The Smallest Arm Cortex-M4 Microcontroller in the World
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No-Opto Isolated DC-DC Flybacks for Smart Factories and Building Automation
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Smart Wake-up for Security and Home Monitoring Cameras
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Keep the Lights On When Someone is Home
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Enabling Industry 4.0 with Low Power, Secure & Reliable Microcontrollers
-
Differences Between DS2431 and DS28E07
-
Relieving Supply Chain Issues of the 1-Wire Silicon Serial Number Chip
-
Just 1-Wire to Operate I2C/SPI Endpoints
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Understand When and Why System Reliability Matters
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Customer Testimonials
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Glossary of EE Terms
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Knowledge Base Search
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Reference Designs
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Design Tools and Models
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Package Materials
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Technical Documents
-
Cross-Reference Search
-
Partners and Technology
-
mgineer Blog
-
Understand When and Why System Reliability Matters
-
How Signal-Chain ICs Form Foundation for Smart-Grid Equipment
-
Can Wearable Health Technology Pinpoint Disease Onset?
-
How to Get 20% More Battery Life for Your Wearables and IoT Designs
-
Is Your Wearable Equipped to Support Remote Patient Monitoring?
-
Biosensors Detect Sleep Apnea Via Wearable, Home-Based Test
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Tips to Achieve Faster Design of USB-C Power Solutions
-
Wearable Flags Health Changes in Seniors Via Biosensors and Predictive Analytics
-
Simplify Your PLC Design with a Digital I/O IC
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Here’s an Easier Way to Keep Your IoT Devices Safe from Hackers
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Buck vs. Boost Converters: How Do They Compare
-
Power Up Internal Circuits While Simplifying Diagnostics for Signal Monitoring Applications
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Why Hardware-Based Cryptography Offers Stronger IoT Design Protection
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High-Speed Serial Links for High-Performance ADAS Solutions
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Crafty Engineers Create COVID-19 Monitoring Devices with Arduino Boards and Maxim ICs
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Download App for Essential Analog IC Information On-the-Go
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Get More System Power Protection for Less
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When Smarter Gets Smaller, Only a Dual-Core Micro Will Do
-
Two Beautiful Ways to Measure Temperature
-
Understand and Address Threats to Cryptographic Systems
-
Can a Supercapacitor Replace Your Battery for Backup Power
-
What Can You Create with Frequency Synthesizers?
-
How Fast and Safe Will 5G Wireless Networks Be
-
These Industrial Communications ICs are Oldies but Goodies for Good Reason
-
DIY Engineering Projects for Your Valentine
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Why Embedded Systems Designers Should Care About OpenSSL
-
Balancing Power Demands of High-Voltage Automotive Power Applications
-
PUF Technology Protects Against Invasive Attacks
-
Safer Electric Vehicles Start with a Fast, Accurate Battery Management System
-
Simplify Vehicle Head Unit Design with Maxim’s Radio Tuner Solution
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Moving Toward Value-Based Healthcare Using Wearables and Patient-Generated Data
-
A Smarter Way to Design Touchscreens
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Want to Avoid Counterfeiting?
-
Ultra-Small Wearable Healthcare Design Platform
-
Vision Realized in Advancing Industry 4.0 Solutions
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Solving EMI Challenges in LED Headlamps
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embedded world 2017
-
Engineering is for Dummies
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See & Hear Maxim Technologies at Mobile World Congress
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Keeping Cars Safe and Reliable Via ISO 26262 Certification
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Fast (But Not Too Fast) Op Amps for Reliable Very Low-Power Systems
-
Shade-Proof Your Solar with Maxim Solar Cell Optimizers
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How Machine Learning Can Speed Up Your Design Cycle
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MakeWithMaxim Design Contest
-
To IO-Link and Beyond!
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How 3D Printers Help You Evaluate ICs
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Optical Networking Technologies OFC 2017
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How You Can Help Bring 20.8 Billion Connected Things Into the World
-
Reference Designs Go Beyond the IC, Become Complete Systems
-
Industry 4.0 is Coming on Strong, and Analog Integration is a Major Beneficiary
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Putting the power of Industry 4.0 in your Pocket
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Battery fuel gauge ICs do more
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Reference Designs: Game Changers for Complex Projects
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Why Hackers Can’t Wait to Get Into Your New Car
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Your Home Might Be Smarter—But How Secure Is It from Hackers?
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What’s Your Favorite IoT Platform? Vote Today!
-
Achieving Fast, Accurate Fault Detection on Smart Electricity Grid
-
Fitness/Wellness Wearables Reference Design Saves Development Time and Effort
-
Simplifying Design of Pulse Rate/Blood-Oxygen Wearables
-
Don’t Design the Next Useless IoT Gadget
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Exactly What the Doctor Ordered: Cars that Monitor Their Own Health and Yours
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Reducing Component Count in Factory Automation Applications
-
Maxim Highlights Auto, Wearable Healthcare Tech at CES
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Cut 6 Months Off Health Application Design Cycle
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Future Engineers Make with Maxim at Yale’s YHack Hackathon
-
Interesting Inventions Inspire Ingenuity
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Ants Have Their Own Smart Cities—Why Can’t We?
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Proximity Sensing Made Easier
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Get Longer Battery Life By Lowering Quiescent Current
-
Eat Pie and Win a Dev Board
-
Why System Monitoring ICs Are Good Analog Insurance
-
Who is nanoMan?
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Why Now Is the Time to Consider Wired Interface Solutions
-
Get to Market Quickly with Your Secure Wearable Health Designs
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Why Powerline Communications is Great for Noisy Industrial Environments
-
How Factory Automation Can Support Reshoring
-
Don’t Become the Next Hacking Headline
-
One Smart Design: Low IQ Boost Converter
-
A Look at the Future of Wearable Healthcare Design
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Camera Interfaces Critical to ADAS System Design
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Reduce Calibration Costs for Industrial Process Control
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Making Smart Energy Even Smarter Via nanoPower Technology
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We Love Startups! Let Us Help You Prototype Quickly
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Safeguard IoT Designs with Holistic Approach to Security
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Surprising Facts About the Cost to Operate Your Electric Car
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Keeping Hackers Away from Your POS Terminals
-
Webinar: Learn Why It’s Smart to Have a Low IQ
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Why Sensors Are the Next Big Thing
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Building a Self-Balancing Robot with Feature-Rich Featherboard
-
Helping You Create Rugged, Long-Lasting Mil/Aero Designs
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Why You Can’t Afford to Overlook Design Security
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Why Iso-Buck Converters Are Better than Flyback Converters
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Learn Ways to Improve Power Efficiency—Free Seminar
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Are Machines Taking Over?
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Are You Doing Enough to Build Trust in Our Connected World?
-
Aggies Invent: 48 Hours from Idea to Prototype
-
IoT World: From IoT Patterns to Blockchain Security
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Building the Self-Aware Digital Factory
-
Flexound Systems Brings Immersive Dimension to Music
-
Better Battery Runtimes Without Characterization
-
Driving Greater Performance and Safety from Advanced Automotive Lighting
-
How Secure ICs Protect Data in Transit in IoT Devices
-
Learn 3 Key Ways to Lock In Security for Your IoT Design
-
Recloser Controllers Maintain Smart Grid Uptime
-
Operate Your Design from a Single Battery, with the Right Converter
-
Show Your Engineering Ingenuity in Summer of Love Contest
-
SDR Baseband Processing—Flexibly and Cost-Effectively
-
Embedded Security ICs Safeguard PCs and Payments
-
Want Your Oven to Play Your Favorite U2 Song?
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Choosing the Right Power Management ICs for Automotive Designs
-
Designing Hearables? Tiny PMICs Boost Battery Life
-
Designing Accurate, Wearable Optical Heart Rate Monitors
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Maxim Interns Showcase Summer Projects
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Protect Your Medical Device Endpoints with Secure Authenticators
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Are Your Power Supplies Doing the Job?
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Tesla Switching to PMAC Synchronous Drive Motor for Model 3
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3 Cool Technologies for Virtual Healthcare
-
nanoMan Says: Use This Power Design Simulation Tool
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How Fast Can You Solve This Crossword Puzzle?
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Why Not Design a Smaller PLC?
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5 Blog Posts You Don’t Want to Miss
-
Q&A: Maxim's Randall Wollschlager on Designing the Future Car
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Simplify Power Circuit Design with Simulation
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How Medical Wearables Enhance Quality of Life
-
IO-Link Handbook Presents Primer on Designing Sensors and Masters
-
ELIV 2017: Learn Ways to Design Safer, Smarter Cars
-
Infomart Creates Tiny Power-over-Ethernet Devices
-
Advancing Safety and Infotainment for Cars of Today and the Future
-
How PA Linearization Solves Key Challenge for Remote PHY Fiber Nodes
-
What It Takes to Deliver Safer, Smarter Cars
-
Many Technologies Are Vying for Your IoT Wide Area Network Design
-
Are Your IoT Devices Immune to Cyberattacks?
-
Machine Learning Club Drives Data Science Demand
-
Designing Tiny, Connected Products? Don’t Miss this Webinar
-
How Factory Automation Can Support Reshoring
-
How Can We Create One Trillion Connected Devices?
-
Modular System Speeds Up IoT Design Cycle
-
Keep Designs Cool with a Tiny, Low-Power Temperature Sensor
-
Circuit Protection You Might Not Have Thought About
-
You Can’t Steal a Key that Isn’t There
-
See Demos of Turnkey Security ICs at TRUSTECH
-
Synchronous Switching Regulators: Talk Time or Standby Time?
-
5 Ways Solar Power Usage Will Change By 2037
-
What Kind of World Will One Trillion Connected Devices Produce?
-
Can We Fix the Cybersecurity Mess?
-
Three Great Personal Gadgets for Engineers
-
Secure TLS in Connected Devices with a Companion Security IC
-
Are There One Trillion Things to Connect?
-
Maxim to Demo High-Speed SerDes Links and More at CES 2018
-
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Getting to Reliable Sensor Data: Interaction Between Electronics, Optics, and Mechanical Design
Getting to Reliable Sensor Data: Interaction Between Electronics, Optics, and Mechanical Design
January 15, 2020
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By: Ian Chen Executive Director, Industrial & Healthcare Business Unit, Maxim Integrated |
Getting reliable sensor data is complex. For example, an optical heart-rate sensor is actually sensing the changes in an electric current. Heartbeats cause the volume of arterial blood to change synchronously with each pulse. The change in volume changes the amount of light absorbed and reflected as it travels through live tissue. When that light exits the tissue and enters a photodetector, it changes the output current. By creating a sensing system that carefully sets up a proper series of “dominos,” a current sensor becomes a heart-rate sensor.
This is how most sensors work. Sensors generally make esoteric electrical measurements (capacitance, impedance, current, voltage). But through an elaborate system construct, a physical event of interest (acceleration, pressure, footsteps, distance) is made to change that measurement. Knowing the system construct, we could then interpret the change into a physical parameter, all the while assuming everything else in the sensing system stays constant or at least is well controlled.
But what if the dominos aren’t all under the designer’s control?
This article will illustrate the challenges of sensor data reliability using an optical heart-rate sensor as the example. However, the complex nature of sensor quality applies to most sensors, not just optical ones.
Understanding the Optical Path
The optical path is the path light travels from the source (emitter) to the detector (receiver). The path spans across one or more media and any change in those media could interact and affect the light characteristics at the detector. As such, the received light encapsulates all changes in the media along the entire optical path.
For an optical heart-rate sensor, light comes from one or more LEDs and is aimed at live tissue. Before arriving at the tissue, the light has to travel through air and sometimes a layer of cover glass. Air, cover glass, and the surface of the tissue are three different optical media. Similarly, the tissue is not homogenous and could be modeled as successive layers of optical media with different refractive indices.
At the interface of any two media with different optical properties, light could be absorbed (attenuated), reflected (scattered) into the first medium, or transmitted into the second medium. Figure 1 simplistically shows the many paths light can take after leaving the LED as it make its way through different media.
Figure 1. Example of the paths that light can take after leaving the LED and making its way through different media.
We are not concerned with all the possible optical paths; only those optical paths that end at the photodetector are relevant to optical sensing. Heart-rate sensing works because one of these media, the capillaries, changes volume over time synchronous to heart rate. The change affects the amount of light absorbed and reflected. Optical system design must make sure that the path most light takes to go from the LED to the photodetector also interacts with the capillaries.
Data reliability is compromised when light can reach the photodetector without interacting with the capillaries or when something along the optical path changes unexpectedly. Notably, every media above the cover glass is outside the control of the designer, and some optical properties could even change over time. Interpreting any change in the photodetector current as a change in heart rate would be a simplification. The following section takes a look at changes in the media traversed by the optical path and how they could affect the photodetector current.
Impact of Dirt on the Cover Glass and Other Attenuators
Dirt and grime on the cover glass may be unavoidable in practical applications. They largely serve to attenuate the photodetector current by reducing both the LED light that may reach the tissue and the light received by the detector. For heart-rate sensing, the important information is carried in the periodicity and not the overall amplitude of the signal. So, as long as the emitter is strong enough, some attenuation should not result in any loss of information. However, if the sensing configuration uses more than one LED or multiple wavelengths, it is possible that light intensity for each LED and/or wavelength would not be affected by the same proportion.
This discussion can be expanded to cover other light-attenuating factors outside of the designer’s control. These factors include hair, skin pigment, and color changes of the cover glass. Each medium serves to attenuate light passing through it, in both directions, and each may affect some wavelength of light more than others.
Changing Air Gap or Path Length
Figure 2 depicts an optical heart-rate sensor. The distance between the skin surface and the optical components (light source and photodetector) is often called the air gap.
Light could enter the photodetector after being scattered by the skin surface (Ir) or after it has traversed through some layers of tissue (I). Only the optical path of I could have been affected by changes in the tissue and could, therefore, contain useful information. Consequently, a sound heart-rate sensor must minimize the magnitude of Ir by tending to the separation between the light source and the photodetector and their associated mechanical housing design. In doing so, the designers must make an assumption on the size of the air gap, which in practice they cannot fully control. When the air gap becomes larger, both I and Ir will be weaker and harder to detect because the photodetector is now farther away. At the same time, proportionately more light directly reflected off the skin surface can now enter the photodetector. Both factors degrade the signal-to-noise ratio of the sensor data, making any derived information less reliable.
Figure 2. In the optical path of a heart-rate sensor, an air gap can degrade signal-to-noise, making it harder to attain reliable sensor data.
Furthermore, unlike dirt and grime, the air gap can change periodically as well; for example, when subjects are exercising vigorously, the mechanical coupling between the sensors and the target tissues could change with rhythmic motion. This will introduce a different periodic change in the photodetector current not controlled by capillary pulsation. As a result, heart-rate detection algorithms may become confused.
More than Air in the “Air Gap”
In many wearable applications, water (in the form of, say, sweat or rain) could be present in the “air gap.” The resulting combinations and variations are numerous, but we could consider some generalities. When the sensing target is live tissue, which is mostly comprised of water, having water in the air gap actually narrows the difference in refractive index between the air gap and the target. This should allow a proportionately greater amount of light to be transmitted into the tissue, strengthening the sensing mechanism.
Addressing Biological Change in the Subject
An inherent truth in long-term biosensing and monitoring is the fact that the target (living tissue) will grow and change. For example, increasing pressure on the tissue could pinch off blood flow and diminish or otherwise compromise the detected signal at the photodetector. Likewise, inflammation and swelling on the tissue changes the optical path of the sensor.
Often, these changes are not challenges, but, instead, the objectives behind long-term optical biosensing. Being able to capture biological changes by monitoring changes to light through the tissue is what makes optical biosensors a useful tool not just for heart-rate monitoring, but as the foundation for many different types of non-invasive health and wellness monitoring. Nevertheless, when monitoring for one set of biological change, designers have to remain cognizant of other potential biological changes and how they may interact with the optical path to provide false signals and make the sensing data less reliable.
Maximizing Signal Path Performance
With everything that could affect the optical signal, it becomes increasingly important that the part of the optical data path that is under the designer’s control gives the best signal-to-noise performance. A high-performance design makes discerning the reliability of the sensor data easier.
For example, any light which makes its way to the photodetector but did not enter the target tissue, not just the light emitted from the LED source, adds to the noise of the biosensing signal. Some integrated analog front-end (AFE) devices, like the MAX86140 and the MAX86171, sample any ambient current on the photodetector asynchronous to the LED light source and subtract them from the photodetector current. Indeed these AFEs even anticipate how ambient light conditions could change in typical use cases so that designers can trust that their effects will have little impact on the biosensing signals.
Know When Sensor Data Is Not Reliable
With many things along the optical path potentially changing, designers may include other mechanisms to detect potential changes to ensure the reliability of sensor data.
One coping strategy is to use sensors unaffected by optical path changes to monitor when such changes might occur. For example, accelerometers could notice moving targets and pressure sensors could sense increased compression. Because these sensors use a different modality than optical sensors, they can at least warn designers that sensor data may be compromised and, in some cases, could even be used to help mitigate against using data with different optical paths, making the result more reliable.
Another strategy is to use more than one light frequency as lights of different colors are attenuated differently by each optical medium. A change in the optical path would, therefore, attenuate or scatter each colored light with different proportions. By comparing the spectral composition of the emitted and the received light, designers can get information on how the optical path has changed.
Sensor data are inputs to algorithms which interpret the data and translate them into meaningful information. Algorithms could use known physical models or the context of the use case and historical sensor data to determine if new data has become unreliable. In a future article, I’ll take a more quantitative look at the interactions of sensor data and algorithms to provide reliable and actionable information to device end users.