Direct Digital Synthesis (DDS) is a method used in signal generation where a digital signal is converted into an analog waveform with precise frequency and phase control. DDS ICs utilize digital techniques to generate accurate and stable waveforms, making them suitable for applications such as frequency synthesis, waveform generation, and signal modulation in various electronic systems. DDS ICs with wider frequency coverage, higher resolution, advanced phase control features, and multiple output channels typically command higher price points. When purchasing DDS ICs, consider the specific requirements of your signal generation application. Determine the needed frequency range, phase accuracy, output waveform characteristics, and interface compatibility with your system. Pay attention to factors such as spurious-free dynamic range (SFDR), phase noise, and settling time for accurate waveform generation.