AD9859 Datasheet

• 400 MSPS internal clock speed
• Integrated 10-bit DAC
• 32-bit tuning word
• Phase noise ≤ –120 dBc/Hz at 1 kHz offset (DAC output)
• Excellent dynamic performance
  >75 dB SFDR at 160 MHz (±100 kHz offset) A_OUT
• Serial input/output (I/O) control
• 1.8 V power supply
• Software and hardware controlled power-down
• 48-lead TQFP/EP package
• 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 generators
• Test and measurement equipment
• Commercial and amateur radio exciter

The AD9859 is a direct digital synthesizer (DDS) featuring a 10-bit DAC operating at up to 400 MSPS. The AD9859 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 AD9859 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 AD9859 via a serial I/O port.

The AD9859 is specified to operate over the extended industrial temperature range of –40°C to +105°C.