Fastest digital synthesisers to integrate 14-bit DAC

24 January 2007 Analogue, Mixed Signal, LSI

Analog Devices has more than doubled the clock speed of direct digital synthesiser (DDS) integrated circuits with on-chip 14-bit digital-to-analog converters. ADI's DDS ICs use digital technology to synthesise analog waveforms, used in a wide range of frequency agile applications, such as wireless base stations, military and commercial radar, test equipment and secure communications systems. The AD9910 and AD9957 are claimed to be the first DDS devices to achieve speeds of 1 giga samples per second (GSPS), while lowering power consumption by more than 50%. The new DDS products represent a significant step forward, providing 8 to 12 dB better spurious free dynamic range (SFDR) when compared to previous generations. For wireless and wired systems, ADI says that the AD9957 DDS modulator or quadrature digital upconverter (QDUC) simplifies data transmission by offering real outputs up to intermediate frequencies of 400 MHz. The AD9910 DDS and AD9957 QDUC are packaged in 100-lead TQFP.

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