DESCRIPTION

· The AD9850 is a highly integrated DDS synthesizer with a high-speed DAC and comparator.
· It generates a spectrally pure, frequency/phase programmable sine wave.
· The output frequency can be digitally changed at up to 23 million new frequencies per second.
· It supports phase modulation in increments of 180°, 90°, 45°, 22.5°, and 11.25°.
· The device operates with a 3.3 V or 5 V single-supply and consumes 155 mW at 3.3 V.

FEATURES

· 125 MHz clock rate with a 32-bit frequency tuning word.
· On-chip high-performance DAC with SFDR > 50 dB at 40 MHz.
· Simplified control interface with parallel byte or serial loading format.
· Phase modulation capability and power-down function.
· Available in a 28-lead SSOP package, operating from -40°C to +85°C.

APPLICATIONS

· Frequency/phase-agile sine wave synthesis.
· Clock recovery and locking circuitry for digital communications.
· Digitally controlled ADC encode generator.
· Agile local oscillator applications.