Why use a High Performance Digital to Analog Converter (DAC)?
Synthesised analog signals are used in many applications, and in particular for communication systems – both analog and digital. By generating analog signals digitally all the usual advantages of ‘digital’ can be gained – accuracy, stability, repeatability, and not forgetting fast to change. Digital processing is used to create a specific frequency spectrum mathematically which when output through a DAC produces the desired analog signal. Not surprisingly with advances in DSP it is relatively easy to ensure the desired accuracy of the digital signal and therefore the DAC tends to limit absolute performance. Because of this potential limitation, that could ultimately determine overall system performance, designers require high performance devices such as the new Fujitsu DAC ASSPs.
