AD9833

Data Sheet FEATURES Digitally programmable frequency and phase 12.65 mW power consumption at 3 V 0 MHz to 12.5 MHz output frequency range 28-bit resolution: 0.1 Hz at 25 MHz reference clock Sinusoidal, triangular, and square wave outputs 2.3 V to 5.5 V power supply No external components required 3-wire SPI interface Extended temperature range: −40°C to +105°C Power-down option 10-lead MSOP package Qualified for automotive applications APPLICATIONS Frequency stimulus/waveform generation Liquid and gas flow measurement Sensory applications: proximity, motion, and defect detection Line loss/attenuation Test and medical equipment Sweep/clock generators Time domain reflectometry (TDR) applications Low Power, 12.65 mW, 2.3 V to 5.5 V, Programmable Waveform Generator AD9833 GENERAL DESCRIPTION The AD9833 is a low power, programmable waveform generator capable of producing sine, triangular, and square wave outputs. Waveform generation is required in various types of sensing, actuation, and time domain reflectometry (TDR) applications. The output frequency and phase are software programmable, allowing easy tuning. No external components are needed. The frequency registers are 28 bits wide: with a 25 MHz clock rate, resolution of 0.1 Hz can be achieved; with a 1 MHz clock rate, the AD9833 can be tuned to 0.004 Hz resolution. The AD9833 is written to via a 3-wire serial interface. This serial interface operates at clock rates up to 40 MHz and is compatible with DSP and microcontroller...