Data Sheet
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 mW power consumption
16-Lead TSSOP
25 MHz Direct Digital Synthesizer,
Waveform Generator
GENERAL DESCRIPTION
The AD9832 is a numerically controlled oscillator employing
a phase accumulator, a sine look-up table, and a 10-bit digital-
to-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 mW (5 V) or 3 mW (3 V). The part is available in a 16-lead
TSSOP package.
Similar DDS products can be found at
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
FUNCTIONAL BLOCK DIAGRAM
DVDD
FSELECT
BIT
SELSRC
DGND
AVDD
AGND
REFOUT
FS ADJUST
REFIN
MCLK
FSELECT
MUX
ON-BOARD
REFERENCE
SYNC
FULL-SCALE
CONTROL
COMP
FREQ0 REG
FREQ1 REG
PHASE
ACCUMULATO
R
(32 BIT)
MUX
12
SIN
ROM
10-BIT DAC
IOUT
PHASE0 REG
PHASE1 REG
PHASE2 REG
SYNC
PHASE3 REG
SYNC
16-BIT DATA REGISTER
SYNC
8 MSBs
8 LSBs
DEFER REGISTER
SELSRC
CONTROL REGISTER
DECODE LOGIC
FSELECT/PSEL REGISTER
SERIAL REGISTER
09090-001
MUX
AD9832
MUX
MUX
PSEL0
BIT
PSEL1
BIT
FSYNC
SCLK
SDATA
PSEL0 PSEL1
Figure 1.
Rev. E
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©1999–2013 Analog Devices, Inc. All rights reserved.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
AD [ ANALOG DEVICES ]
