AD9910 1 GSPS, 14-Bit, 3.3 V CMOS Direct Digital Synthesizer

Product Details

The AD9910 is a direct digital synthesizer (DDS) featuring an integrated 14-bit DAC and supporting sample rates up to 1 GSPS. The AD9910 employs an advanced, proprietary DDS technology that provides a significant reduction in power consumption without sacrificing performance. The DDS/DAC combination forms a digitally programmable, high frequency, analog output synthesizer capable of generating a frequency agile sinusoidal waveform at frequencies up to 400 MHz.

The user has access to the three signal control parameters that control the DDS: frequency, phase, and amplitude. The DDS provides fast frequency hopping and frequency tuning resolution with its 32-bit accumulator. With a 1 GSPS sample rate, the tuning resolution is ~0.23 Hz. The DDS also enables fast phase and amplitude switching capability.

The AD9910 is controlled by programming its internal control registers via a serial I/O port. The AD9910 includes an integrated static RAM to support various combinations of frequency, phase, and/or amplitude modulation. The AD9910 also supports a user defined, digitally controlled, digital ramp mode of operation. In this mode, the frequency, phase, or amplitude can be varied linearly over time. For more advanced modulation functions, a high speed parallel data input port is included to enable direct frequency, phase, amplitude, or polar modulation.

The AD9910 is specified to operate over the extended industrial temperature range.

Applications

  • Agile local oscillator (LO) frequency synthesis
  • Programmable clock generators
  • FM chirp source for radar and scanning systems
  • Test and measurement equipment
  • Acousto-optic device drivers
  • Polar modulators
  • Fast frequency hopping

Features and Benefits

  • 1 GSPS internal clock speed (up to 400 MHz analog output)
  • Integrated 1 GSPS, 14-bit DAC
  • 0.23 Hz or better frequency resolution
  • Phase noise ≤ −125 dBc/Hz at 1 kHz offset (400 MHz carrier)
  • Excellent dynamic performance with >80 dB narrow-band SFDR
  • Serial input/output (I/O) control
  • Automatic linear or arbitrary frequency, phase, and amplitude sweep capability
  • 8 frequency and phase offset profiles
  • Sin(x)/(x) correction (inverse sinc filter)
  • 1.8 V and 3.3 V power supplies
  • Software and hardware controlled power-down
  • 100-lead TQFP_EP package
  • Integrated 1024 word × 32-bit RAM
  • PLL REFCLK multiplier
  • Parallel datapath interface
  • Internal oscillator can be driven by a single crystal
  • Phase modulation capability
  • Amplitude modulation capability
  • Multichip synchronization