October 2016 Analog Dialogue Note from the Editor

Blog Post created by jsur on Oct 24, 2016

Welcome to the new Analog Dialogue! Thank you to all the readers who responded to our survey when we began this project over a year ago. You have helped us create a new experience, while staying true to the technical roots of the publication. We have added many new features and given it a new, which we hope you’ll find more engaging and easier to navigate. The new design preserves the integrity of the nearly 50-year-old journal, and evolves the presentation of its contents into a more dynamic and interactive experience for the reader. New features include: cover art of every journal in the archives section, compelling imagery to showcase each article, and plenty of easy ways to share articles in social media. Also, in the near future, it will include ways to add comments on articles, show trending content, and make the overall experience more specific to your needs and interests, through personalization. And we’re expanding Analog Dialogue’s scope in other ways, an example being a new section called StudentZone, a place for engineering students to find articles and resources aimed at solving or assisting with their particular problems and issues. I think you’ll agree that the new format presents a much more contemporary look, more intuitive navigation, and a more responsive website experience, and it’s all easily accessible on your smartphone, tablet, and PC. Of course, print-friendly PDFs of each article are also available.


If you can get past being dazzled by our new look, the feature article Improper Power Sequencing in Op Amps: Analyzing the Risks by David Guo sequence is about as “real world” as it gets. Guo takes a look at situations that occur with sequencing multiple supply voltages, in which the power supplies need to be, but aren’t always, established simultaneously with or before any input signals are applied. When proper sequencing doesn’t happen, which is a common issue, overvoltage and latch-up conditions can occur—this article provides some serious help for this tricky design situation.


Our second feature, Complete Gas Sensor Circuit using Nondispersive Infrared (NDIR) by Robert Lee and Walt Kester, provides a useful gas concentration circuit design based on the NDIR principle. Note that this circuit board is designed using an Arduino shield form factor and interfaces to our EVAL-ADICUP360 Arduino-compatible platform board.


To borrow a line from Bob Pease, “What’s all this Arduino stuff anyhow?”


As most of our readership probably knows, the Arduino is an open-source electronics development platform for fast prototyping, with a rabid worldwide support network that’s connected to the Maker movement. It’s credited with boosting interest in electronics lately. The Arduino is easy to interface to and easy to control from a PC. The platform was originally aimed at students with no background in programming or electronics. Hobbyists, artists, and students of all types, use Arduino to create all kinds of projects. It very much simplifies the process of working with microcontrollers, and the programming is also simplified. However, a recent article in ElectronicsWeekly.com says that the latest, more powerful, Arduino configurations are being used more and more in professional engineering to fast-track prototypes, especially for the Internet of Things (IoT). Analog Devices joined the Arduino bandwagon a few years back, when we realized that both hobbyists and professionals were using the platform. Our Arduino-compatible platform board was the first to incorporate dual high-performance ADCs.


To our readers, thank you for your loyalty, support and feedback over these many years. We hope you enjoy the Analog Dialogue redesign and we look forward to continuing our analog (and mixed signal, and digital, and whatever the future may bring…) dialogue!


Best regards,

Jim Surber, Editor