Volume 47 — May 2013

Timely Information

Application Notes

Circuits from the Lab

eBooks and Printable

EngineerZone

New-Product Briefs

Rarely Asked Questions

Technical Articles

Webinars

Timeless Information

Analog Devices

eNewsletters

Social Media

Technical Books

Feature Articles: Products, Applications, Technology, and Techniques

Safeguard Your RS-485 Communication Networks from Harmful EMC Events

RS-485 links must work in harsh environments, with large transient voltages caused by lightning strikes, electrostatic discharge, and other electromagnetic phenomenon, so they must meet standards for electrostatic discharge, electrical fast transients, and surge. This article describes these transient types and presents EMC compliant solutions for three different cost/protection levels.

Complete Sensor-to-Bits Solution Simplifies Industrial Data-Acquisition System Design

At the heart of many industrial automation and process-control systems, programmable logic controllers employ multiple sensors and actuators to measure and control analog process variables such as pressure, temperature, and flow. This article shows how the highly integrated ADAS3022 reduces complexity, facilitating the design of multichannel data-acquisition systems.

...Recent Feature Articles: Products, Applications, Technology, and Techniques

Feature Articles: Design Ideas, Tutorials, Measurement Techniques

Programmable-Gain TIAs Maximize Dynamic Range in Spectroscopy Systems

Precision instruments that measure physical properties using a photodiode or other current-output sensor often include a transimpedance amplifier (TIA) and a programmable-gain stage to maximize dynamic range. This article shows the benefits and challenges of implementing a single-stage programmable-gain TIA to minimize noise while maintaining high bandwidth and accuracy.

Choose Resistors to Minimize Errors in Grounded-Load Current Source

Operational amplifiers are often used to make high-quality current sources. In industrial applications, they are widely used to provide 4 mA to 20 mA currents. The improved Howland current source is very popular because it can drive a grounded load. Its accuracy is determined by the amplifier and the resistors. This article shows how to choose the external resistors to minimize errors.

...Recent Feature Articles: Design Ideas, Tutorials, and Measurement Techniques