Analog Devices expanded its suite of online evaluation tools with the introduction of ADIsimDDS. Available to designers at no charge on ADI’s Web site, the ADIsimDDS tool assists users in selecting, evaluating and troubleshooting direct digital synthesis (DDS) ICs from Analog Devices. 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.