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
AEC-Q100 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

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 standards. The
device operates with a power supply from 2.3 V to 5.5 V.
The AD9833 has a power-down function (SLEEP). This function
allows sections of the device that are not being used to be powered
down, thus minimizing the current consumption of the part. For
example, the DAC can be powered down when a clock output
is being generated.
The AD9833 is available in a 10-lead MSOP package.