AD9832 Datasheet | Analog Devices

Data Sheet 25 MHz Direct Digital Synthesizer, Waveform Generator AD9832 Features 25 MHz speed On-chip SIN lookup table On-chip, 10-bit DAC Serial loading Power-down option Temperature range: - 40°C to +85°C 200 m W power consumption 16-Lead TSSOP APPLICATIONS Frequency stimulus/waveform generation Frequency phase tuning and modulation Low power RF/munications systems Liquid and gas flow measurement Sensory applications: proximity, motion, and defect detection Test and medical equipment GENERAL DESCRIPTION The AD9832 is a numerically controlled oscillator employing a phase accumulator, a sine look-up table, and a 10-bit digitalto-analog converter (DAC) integrated on a single CMOS chip. Modulation capabilities are provided for phase modulation and frequency modulation. Clock rates up to 25 MHz are supported. Frequency accuracy can be controlled to one part in 4 billion. Modulation is effected by loading registers through the serial interface. A power-down bit allows the user to power down the AD9832 when it is not in use, the power consumption being reduced to 5 m W (5 V) or 3 m W (3 V). The part is available in a 16-lead TSSOP package. Similar DDS products can be found at .analog./DDS. MCLK FSELECT FUNCTIONAL BLOCK DIAGRAM DVDD DGND AVDD AGND REFOUT FS ADJUST REFIN FSELECT BIT SELSRC SYNC ON-BOARD REFERENCE FULL-SCALE CONTROL FREQ0 REG FREQ1 REG PHASE ACCUMULATOR (32 BIT) 12 SIN ROM 10-BIT DAC P IOUT SYNC PHASE0 REG PHASE1 REG PHASE2 REG PHASE3...