GENERAL DESCRIPTION

The AD9835 is a numerically-controlled oscillator employing a phase accumulator, a COS lookup table, and a 10-bit digital-to-analog converter integrated on a single CMOS chip. Modulation capabilities are provided for phase modulation and frequency modulation.

Clock rates of up to 50 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 AD9835 when it is not in use; the power consumption reduces to 1.75 mW.

This part is available in a 16-lead TSSOP package.

Similar DDS products can be found at http://www.analog.com/DDS.

FEATURES

5 V power supply

50 MHz speed

On-chip COS lookup table

On-chip, 10-bit DAC

Serial loading

Power-down option

Temperature range: −40°C to +85°C

200 mW power consumption

16-Lead TSSOP

APPLICATIONS

Frequency stimulus/waveform generation

Frequency phase tuning and modulation

Low power RF/communications systems

Liquid and gas flow measurement

Sensory applications: proximity, motion, and defect

detection

Test and medical equipment