Direct Digital Synthesizer
Tue, 07/17/2007 - 9:06am
Analog Devices introduces the AD9912 direct digital synthesizer (DDS) which provides impressive spurious free dynamic range (SFDR) performance: output signals up to 400 MHz while consuming less than 1000 mW. This level of performance is attainable using ADI’s proprietary “spur-reduction” channels to knock down the two largest harmonic spurs by up to 10 dB. This helps ease design efforts and enable engineers to spend less time frequency planning, especially in applications such a as military receivers where every last dB is important to maintain critical system functions. The spur-reduction capability expands the benefits of DDS into designs where previous wideband SFDR performance was a limiting factor. The AD9912 is a 1 GSPS DDS device featuring an integrated 14-bit digital-to-analog converter (DAC) and 3.6 microHertz tuning resolution on outputs up to 400 MHz. The AD9912 also features a differential HSTL comparator for clock generation.