AD9851BRSZ

The AD9851BRSZ is a CMOS 180MHz DDS/DAC Synthesizer that uses advanced DDS technology, coupled with an internal high speed, high performance D/A converter and comparator to form a digitally programmable frequency synthesizer and clock generator function. When referenced to an accurate clock source, it generates a stable frequency and phase-programmable digitized analogue output sine wave. This sine wave can be used directly as a frequency source or internally converted to a square wave for agile-clock generator applications. The DDS contains a unique 6x REFCLK multiplier circuit that eliminates the need for a high speed reference oscillator and has minimal impact on SFDR and phase noise characteristics. This provides five bits of programmable phase modulation resolution to enable phase shifting of its output in increments of 11.25°.

• 180MHz Clock rate with selectable 6x reference clock multiplier
• On-chip high performance 10-bit DAC and high speed comparator with hysteresis
• >43dB SFDR
• 32-bit Frequency tuning word
• Parallel or serial simplified control interface
• Asynchronous loading format
• 5-bit Phase modulation and offset capability