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AD9954/PCB Datasheet

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The AD9954 is a direct digital synthesizer (DDS) featuring a 14-bit DAC operating up to 400 MSPS. The AD9954 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 200 MHz. The AD9954 is designed to provide fast frequency hopping and fine tuning resolution (32-bit frequency tuning word). The frequency tuning and control words are loaded into the AD9954 via a serial I/O port. The AD9954 includes an integrated 1024 × 32 static RAM to support flexible frequency sweep capability in several modes. The AD9954 also supports a user defined linear sweep mode of operation. The device includes an on-chip high speed comparator for applications requiring a square wave output.
The AD9954 is specified to operate over the extended industrial temperature range of –40°C to +105°C.

   400 MSPS internal clock speed
   Integrated 14-bit DAC
   Programmable phase/amplitude dithering
   32-bit tuning word
   Phase noise ≤ –120 dBc/Hz @ 1 kHz offset (DAC output)
   Excellent dynamic performance
      >80 dB SFDR @ 160 MHz (±100 kHz offset) AOUT
   Serial I/O control
   Ultrahigh speed analog comparator
   Automatic linear and nonlinear frequency sweeping
   4 frequency/phase offset profiles
   1.8 V power supply
   Software and hardware controlled power-down
   48-lead TQFP/EP package
   Integrated 1024 word × 32-bit RAM
   Support for 5 V input levels on most digital inputs
   PLL REFCLK multiplier (4× to 20×)
   Internal oscillator, can be driven by a single crystal
   Phase modulation capability
   Multichip synchronization

   Agile LO frequency synthesis
   Programmable clock generator
   FM chirp source for radar and scanning systems
   Automotive radar
   Test and measurement equipment
   Acousto-optic device drivers


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