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Volume 49 — July 2015

Timely Information

Application Notes

Circuits from the Lab

New-Product Briefs

Rarely Asked Questions

Technical Articles


Notes From the Editor




Analog-to-Digital Converters

Application Specific

Audio and Video Products


Clock and Timing

Digital-to-Analog Converters

Interface and Isolation

Linear Products



Power Management

Processors and DSP

RF and Microwave


Switches and Multiplexers


Analog Dialogue--Since 1967

Feature Articles: Products, Applications, Technology, Design Ideas, Tutorials, and Measurement Techniques


Interleaving ADCs: Unraveling the Mysteries

Time interleaving is a technique that allows the use of multiple identical analog-to-digital converters to process regular sample data series at a faster rate than the operating sampling rate of each individual data converter. This technique is frequently utilized in military and electronic instrumentation applications where there is a need to continually push the state-of-the-art in data conversion speeds, resolutions, and performance. This article explains the data converter interleaving technique in technical detail as well as focusing on some of the practical challenges associated with implementing this technique.

Zero-Drift Amplifiers: Now Easy to Use in High Precision Circuits

A zero-drift amplifier, as the name suggests, is an amplifier with offset voltage drift very close to zero. It uses auto-zero or chopping technology, or a combination of both, to continuously self-correct for DC errors over time and temperature. This enables the amplifier to achieve microvolt-level offsets and extremely low offset drifts, making it uniquely suited for signal conditioning circuits that require high gain and precision performance. This article explores the architecture of Zero-drift amplifiers and provides insight into considerations for designing with these precision devices in drift-critical applications.

The Ingenious Gentleman and the Mysterious Paddle

Shouldn’t the exposed paddle of an IC amplifier be always connected to ground?


The Basics of MEMS IMU/Gyroscope Alignment

Sensor misalignment is often a key consideration for high
performance motion control systems that use MEMS inertial measurement units (IMUs) in their feedback loops. For the gyroscopes in the IMU, sensor misalignment describes the angular difference between each gyroscope’s axis of rotation and the system defined inertial reference frame, also known as the global frame. Managing the impact that misalignment has on sensor accuracy can require unique packaging, special assembly processes, or even complex inertial testing in the final configuration. This article defines and explores three basic alignment concepts that are necessary for the designer to understand and evaluate when architecting an IMU function for a system: error estimation, understanding misalignment impact on key system behaviors, and electronic alignment (after installation).


Multifunction: a Dilemma or Reality?

Next-generation aerospace and defense system designers are being pushed to develop advanced, highly configurable systems that combine a range of functions and requirements, integrating functionality that would have historically been implemented by separate standalone systems. Clearly this has the benefit of reducing the number of subsystems that need to be supported by any mission platform, reducing the overall size, weight, and power (SWaP), but with the further need to support cognitive
and real-time configurability, the challenges can seem daunting. This article looks at a new generation of high performance, wideband components that are potentially providing a solution to this challenge, supporting the high performance levels required for each system, but with a broad enough operating range to meet the multifunction challenge.


Mystery Spur Explained: Don’t’ Blame the DDC!

Can you explain the existence of a mystery spur in my ADC's output spectrum?

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Analog Dialogue is the technical magazine of Analog Devices. It discusses products, applications, technology, and techniques for analog, digital and mixed-signal processing.

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