Use Noise Spectral Density to Evaluate ADCs in “Software-Defined” Systems (.PDF Download)

The expanded availability of high-speed and very-high-speed ADCs and digital processing is making oversampling a practical architectural approach for broadband and RF systems. Semiconductor scaling has done much to boost speeds and lower costs (in dollars, power, board areas, etc.), enabling system designers to explore different avenues of converting and processing signals either using broadband converters with flat noise spectral density, or band-limited delta-sigma converters with high dynamic range in the desired band of interest. These techniques change the way design engineers should think about signal processing, and the way they specify products...

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