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Analog Devices - Direct Digital Synthesizer

Numéro de référence AD9952
Description Direct Digital Synthesizer
Fabricant Analog Devices 
Logo Analog Devices 





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AD9952 fiche technique
400 MSPS 14-Bit, 1.8 V CMOS
Direct Digital Synthesizer
AD9952
FEATURES
400 MSPS internal clock speed
Integrated 14-bit DAC
32-bit tuning word
Phase noise ≤ −120 dBc/Hz @ 1 kHz offset (DAC output)
Excellent dynamic performance
>80 dB SFDR @ 160 MHz (±100 kHz offset) AOUT
Serial I/O control
1.8 V power supply
Software and hardware controlled power-down
48-lead TQFP_EP package
Support for 5 V input levels on most digital inputs
PLL REFCLK multiplier (4× to 20×)
Internal oscillator, can be driven by a single crystal
Phase modulation capability
Multichip synchronization
High speed comparator (200 MHz toggle rate)
APPLICATIONS
Agile LO frequency synthesis
Programmable clock generators
Test and measurement equipment
Acousto-optic device drivers
GENERAL DESCRIPTION
The AD9952 is a direct digital synthesizer (DDS) featuring a
14-bit DAC (digital-to-analog converter) and operating up to
400 MSPS. The AD9952 uses advanced DDS technology,
coupled with an internal high speed, high performance DAC to
form a digitally programmable, complete high frequency
synthesizer capable of generating a frequency-agile analog
output sinusoidal waveform at up to 200 MHz. The AD9952 is
designed to provide fast frequency hopping and fine tuning
resolution (32-bit frequency tuning word). The frequency
tuning and control words are loaded into the AD9952 via a
serial I/O port.
The AD9952 is specified to operate over the extended industrial
temperature range of −40°C to +105°C.
FUNCTIONAL BLOCK DIAGRAM
DDS CORE
PHASE
ACCUMULATOR
Z–1
32
PHASE
OFFSET
19
COS(X)
AD9952
14 DAC
14
SYSTEM
CLOCK
Z–1
DAC_RSET
IOUT
IOUT
32 14
I/O UPDATE
SYNC_CLK
REFCLK
REFCLK
0
M
U
X
SYNC
OSCILLATOR/BUFFER
ENABLE
4× TO 20×
CLOCK
MULTIPLIER
TIMING AND CONTROL LOGIC
÷ 4 CONTROL REGISTERS
M
U SYSTEM
X CLOCK
SYNC_IN
OSK
PWRDWNCTL
COMPARATOR
COMP_IN
COMP_IN
COMP_OUT
CRYSTAL OUT
I/O PORT
Figure 1.
RESET
Rev. B
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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 ©2003–2009 Analog Devices, Inc. All rights reserved.

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