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Online tool eases evaluation of DDS chips

Posted: 21 Aug 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Analog Devices? LabVIEW? ADIsimDDS? online evaluation tool? DDS IC?

Analog Devices Inc. (ADI) has expanded its suite of online evaluation tools with the launching of ADIsimDDS, which assists users in selecting, evaluating and troubleshooting direct digital synthesis (DDS) ICs from Analog Devices Inc. (ADI).

Using parametric data to mathematically model the general behavior of a selected DDS IC, it allows designers to enter the desired operating conditions, evaluate the quality of the circuit's sine wave and view the resulting harmonic images. The tool, which does not require a software download, is accessible in real-time at ADI's website.

"As is the case with our entire suite of ADIsim tools, designers can quickly and efficiently conduct real-time simulations, trial-test various configurations, get help with support software and troubleshoot potential problems when implementing DDS ICs in their design," said David Kress, director of applications engineering at ADI.

The ADIsimDDS tool allows designers to choose a DDS IC from among ADI's portfolio of products and set general parameters, such as the desired reference clock frequency, output frequency and number of reference clock multipliers required. By observing the behavior of the DDS IC within these parameters, designers obtain a real-time representation of the circuit's harmonic images and sine wave quality.

To assist designers in choosing a filter, the tool is especially effective for frequency planning, which helps minimize the complexity of the filter's design. Designers who are not familiar with DDS ICs will benefit from the tool's ability to troubleshoot potential problems. For example, interactive message flags issue a series of warnings if a circuit configuration may lead to operational issues or if the circuit would degrade overall system performance. This feature helps ensure that each circuit meets performance characteristics, greatly reducing the possibility of costly, time-consuming circuit redesigns. National Instruments' LabVIEW, a software tool for designing test, measurement and control systems, provides ADIsimDDS with a familiar GUI and processes related computational tasks.

- Marty Gold

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