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AD5932 Datasheet

  • AD5932

  • Programmable Single-Scan Waveform Generator

  • 812.00KB

  • 17页

  • AD

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Programmable Frequency Scan
Waveform Generator
AD5932
FEATURES
Programmable frequency profile
No external components necessary
Output frequency up to 25 MHz
Burst-and-listen capability
Preprogrammable frequency profile minimizes number of
DSP/microcontroller writes
Sinusoidal/triangular/square wave outputs
Automatic or single pin control of frequency stepping
Power-down mode: 20 渭A
Power supply: 2.3 V to 5.5 V
Automotive temperature range: 鈭?0掳C to +125掳C
16-lead, Pb-free TSSOP
GENERAL DESCRIPTION
The AD5932
1
is a waveform generator offering a programmable
frequency scan. Utilizing embedded digital processing that
allows enhanced frequency control, the device generates
synthesized analog or digital frequency-stepped waveforms.
Because frequency profiles are preprogrammed, continuous
write cycles are eliminated, thereby freeing up valuable
DSP/microcontroller resources. Waveforms start from a known
phase and are incremented phase-continuously, which allows
phase shifts to be easily determined. Consuming only 6.7 mA,
the AD5932 provides a convenient low power solution to
waveform generation.
The AD5932 outputs each frequency in the range of interest for
a defined length of time and then steps to the next frequency in
the scan range. The length of time the device outputs a particular
frequency is preprogrammed, and the device increments the
frequency automatically; or, alternatively, the frequency is
incremented externally via the CTRL pin. At the end of the
range, the AD5932 continues to output the last frequency until
the device is reset. The AD5932 also offers a digital output via
the MSBOUT pin.
(continued on Page 3)
APPLICATIONS
Frequency scanning/radar
Network/impedance measurements
Incremental frequency stimulus
Sensory applications
Proximity and motion
FUNCTIONAL BLOCK DIAGRAM
DVDD
CAP/2.5V
DGND
INTERRUPT
STANDBY
AGND
AVDD
REGULATOR
VCC
2.5V
MCLK
SYNC
INCREMENT
CONTROLLER
DATA
INCR
AD5932
BUFFER
SYNCOUT
BUFFER
MSBOUT
CTRL
24-BIT
PIPELINED
DDS CORE
FREQUENCY
CONTROLLER
/
24
10-BIT
DAC
VOUT
DATA AND CONTROL
SERIAL INTERFACE
CONTROL
REGISTER
ON-BOARD
REFERENCE
FULL-SCALE
CONTROL
COMP
05416-001
FSYNC
SCLK
SDATA
Figure 1.
1
Protected by U.S. patent number 6747583; other patents pending.
Rev. 0
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
漏2006 Analog Devices, Inc. All rights reserved.

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