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Статья по применению продукции National Semiconductor.
SIGNAL PATH designer No.121.Digital-to-Analog Converters (DACs) are used to transform digital data into an analog signal.
Since the decades following the Nyquist-Shannon sampling theorem, engineers have developed
and used DACs in applications, but it is only in the past 25 years that monolithic DACs have become
widely available. According to the theorem, any sampled data can be reconstructed perfectly—provided it meets bandwidth and Nyquest criteria. So, with proper design, a DAC can reconstruct sampled data with precision. The digital data may be generated from a microprocessor, Application-Specific Integrated Circuit (ASIC), or Field-Programmable Gate Array (FPGA), but eventually the data requires conversion to an analog signal in order to have impact on the real world. The
world of erratic and dynamic analog signals cannot be handled easily in a pristine 3.3V digital world. In that regard, the DAC serves as the bridge from digital to analog domains – and hopefully ends with an accurate and true representation of the signal.
