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AD5930 Datasheet

  • AD5930

  • Programmable Frequency Sweep and Output Burst Waveform Gener...

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Programmable Frequency Sweep and
Output Burst Waveform Generator
AD5930
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/碌controller writes
Sinusoidal/triangular/square wave outputs
Automatic or single pin control of frequency stepping
Waveform starts at known phase
Increments at 0擄 phase or phase continuously
Power-down mode: 20 碌A(chǔ)
Power supply: 2.3 V to 5.5 V
Automotive temperature range: 鈭?0擄C to +125擄C
20-lead pb-free TSSOP
GENERAL DESCRIPTION
The AD5930
1
is a waveform generator with programmable
frequency sweep and output burst capability. 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
and thereby free up valuable DSP/碌controller resources.
Waveforms start from a known phase and are incremented
phase continuously, which allows phase shifts to be easily
determined. Consuming only 8 mA, the AD5930 provides a
convenient low power solution to waveform generation.
The AD5930 can be operated in a variety of modes. In
continuous output mode, the device outputs the required
frequency for a defined length of time and then steps to the
next frequency. The length of time the device outputs a
particular frequency is either preprogrammed and the device
increments the frequency automatically, or, alternatively, is
incremented externally via the CTRL pin. In burst mode, the
device outputs its frequency for a length of time and then
returns to midscale for a further predefined length of time
before stepping to the next frequency. When the MSBOUT pin
is enabled, a digital output is generated.
(continued on Page 3)
APPLICATIONS
Frequency sweeping/radar
Network/impedance measurements
Incremental frequency stimulus
Sensory applications
Proximity and motion
BFSK
Frequency bursting/pulse trains
FUNCTIONAL BLOCK DIAGRAM
INTERRUPT
STANDBY
DVDD
CAP/2.5V
DGND
AGND AVDD
AD5930
MCLK
REGULATOR
VCC
2.5V
SYNC
BUFFER
SYNCOUT
DGND O/P
SYNC
BUFFER
24-BIT
PIPELINED
DDS CORE
10-BIT
DAC
MSBOUT
IOUTB
IOUT
OUTPUT BURST
CONTROLLER
DATA
CTRL
INCREMENT
CONTROLLER
INCR
DATA
FREQUENCY
CONTROLLER
DATA
24
AND CONTROL
CONTROL
REGISTER
ON-BOARD
REFERENCE
FULL-SCALE
CONTROL
COMP
05333-001
SERIAL INTERFACE
FSYNC SCLK
SDATA
REF
FSADJUST
Figure 1.
1
Protected by US 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 2005 Analog Devices, Inc. All rights reserved.

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