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25 MHz Direct Digital Synthesizer,
Waveform Generator
Data Sheet
AD9832
Rev. E Document Feedback
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.
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Tel: 781.329.4700 ©1999–2013 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
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
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
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 www.analog.com/DDS.
FUNCTIONAL BLOCK DIAGRAM
IOUT
COMP
REFINFS ADJUSTREFOUTAGND
AVDDDGNDDVDD
MCLK
PSEL0 PSEL1
12
AD983
2
ON-BOARD
REFERENCE
10-BIT DAC
PHASE0 REG
PHASE1 REG
PHASE2 REG
PHASE3 REG
FULL-SCALE
CONTROL
SIN
RO
M
PHAS
E
ACCUMULATOR
(32
BIT)
FREQ0 REG
FREQ1 REG
16-BIT DATA REGISTER
SYNC
FSELECT
FSELECT
BIT
SELSRC
SYNC
8 LSBs
8 MSBs
DECODE LOGIC
FSYNC SCLK SDATA
SERIAL REGISTER
CONTROL REGISTER
FSELECT/PSEL REGISTER
DEFER REGISTER
SYNC
SYNC
SELSRC
PSEL0
BIT
PSEL1
BIT
MUX MUX
MUX
MUX
MUX
09090-001
Figure 1.
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