PRODUCT OVERVIEW
The AD9959 consists of four independently programmable DDS channels. The AD9959 features independent frequency, phase, and amplitude control of each channel; this allows for the correction of imbalances due to analog processing such as filtering, amplification, or PCB layout related mismatches. The AD9959 supports frequency sweeping for radar and instrumentation applications. Since all four channels share a common system clock, they are inherently synchronized. If more than four channels are required, synchronizing multiple AD9959s is a simple task.

FEATURES
  Four synchronized DDS channels @500 MSPS
  Independent frequency / phase / amplitude control between all channels
  Matched latencies for Freq, Phase, and Amplitude changes
  Excellent channel to channel isolation
  Frequency sweeping capability
  Up to 16 levels of modulation (pin selectable)
  Individually programmable DAC full scale currents
  Four integrated 10-bit D/A converters(DACs)
  32-bit frequency tuning resolution
  14-bit phase offset resolution
  10-bit output amplitude scaling resolution
  Serial I/O Port(SPI) with enhanced data throughput
  Software/Hardware controlled power-down
  Dual supply operation (1.8 V DDS core / 3.3 V serial I/O)
  Built-in synchronization for multiple devices
  Selectable REF_CLK multipier(PLL) 4x to 20x (bypassable)
  Selectable REF_CLK crystal operation
  56 pin LFCSP package

APPLICATIONS
  Agile L.O. frequency synthesis
  Phased array radar / sonar
  Instrumentation
  Synchronized clocking
  RF source for AOTF