GENERAL DESCRIPTION
The AD9914 is a direct digital synthesizer (DDS) featuring a 12-bit DAC. The AD9914 uses advanced DDS technology, coupled with an internal high speed, high performance DAC to form a digitally programmable, complete high frequency synthesizer capable of generating a frequency-agile analog output sinusoidal waveform at up to 1.4 GHz. The AD9914 enables fast frequency hopping and fine tuning resolution (64-bit capable using programmable modulus mode). The AD9914 also offers fast phase and amplitude hopping capability.
The frequency tuning and control words are loaded into the AD9914 via a serial or parallel I/O port. The AD9914 also supports a user defined linear sweep mode of operation for generating linear swept waveforms of frequency, phase, or amplitude. A high speed, 32-bit parallel data input port is included, enabling high data rates for polar modulation schemes and fast reprogramming of the phase, frequency, and amplitude tuning words.
The AD9914 is specified to operate over the extended industrial temperature range (see the Absolute Maximum Ratings section).

FEATURES
  3.5 GSPS internal clock speed
  Integrated 12-bit DAC
  Frequency tuning resolution to 190 pHz
  16-bit phase tuning resolution
  12-bit amplitude scaling
  Programmable modulus
  Automatic linear and nonlinear frequency sweeping capability
  32-bit parallel datapath interface
  8 frequency/phase offset profiles
  Phase noise: −128 dBc/Hz (1 kHz offset at 1396 MHz)
  Wideband SFDR < −50 dBc
  Serial or parallel I/O control
  1.8 V/3.3 V power supplies
  Software and hardware controlled power-down
  88-lead LFCSP package
  PLL REF CLK multiplier
  Phase modulation capability
  Amplitude modulation capability

APPLICATIONS
  Agile LO frequency synthesis
  Programmable clock generator
  FM chirp source for radar and scanning systems
  Test and measurement equipment
  Acousto-optic device drivers
  Polar modulator
  Fast frequency hopping