AD9953 Datasheet PDF - Analog Devices

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AD9953
Analog Devices

Part Number AD9953
Description 1.8V CMOS Direct Digital Synthesizer
Page 30 Pages


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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
400 MSPS, 14-Bit, 1.8 V CMOS
Direct Digital Synthesizer
AD9953
PLL REFCLK multiplier (4× to 20×)
Internal oscillator, can be driven by a single crystal
Phase modulation capability
Multichip synchronization
APPLICATIONS
Agile VHF/UHF LO frequency synthesis
FM chirp source for radar and scanning systems
Nonlinear-shaped PSK/FSK modulator
Test and measurement equipment
FUNCTIONAL BLOCK DIAGRAM
I/O UPDATE
SYNC_CLK
REFCLK
REFCLK
1024 × 32
STATIC RAM
RAM
DATA
32
M
U
X
DDS CORE
PHASE
ACCUMULATOR
Z–1
PHASE
OFFSET
19
COS(X)
AD9953
14 DAC
Z–1
32 3 32
10
M0
U
X
SYNC
OSCILLATOR/BUFFER
ENABLE
4×–20×
CLOCK
MULTIPLIER
MUX
14 14
RAM DATA <31:18>
TIMING AND CONTROL LOGIC
PHASE
OFFSET
WORD
÷ 4 CONTROL REGISTERS
M
U
X
SYSTEM
CLOCK
SYSTEM
14 CLOCK
DAC_RSET
IOUT
IOUT
SYNC_IN
OSK
PWRDWNCTL
CRYSTAL OUT
PS<1:0> I/O PORT
Figure 1.
RESET
Rev. A
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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AD9953* Product Page Quick Links
Last Content Update: 11/01/2016
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Documentation
Application Notes
• AN-237: Choosing DACs for Direct Digital Synthesis
• AN-280: Mixed Signal Circuit Technologies
• AN-342: Analog Signal-Handling for High Speed and
Accuracy
• AN-345: Grounding for Low-and-High-Frequency Circuits
• AN-419: A Discrete, Low Phase Noise, 125 MHz Crystal
Oscillator for the AD9850
• AN-423: Amplitude Modulation of the AD9850 Direct
Digital Synthesizer
• AN-543: High Quality, All-Digital RF Frequency
Modulation Generation with the ADSP-2181 and the
AD9850 DDS
• AN-557: An Experimenter's Project:
• AN-587: Synchronizing Multiple AD9850/AD9851 DDS-
Based Synthesizers
• AN-605: Synchronizing Multiple AD9852 DDS-Based
Synthesizers
• AN-621: Programming the AD9832/AD9835
• AN-632: Provisionary Data Rates Using the AD9951 DDS
as an Agile Reference Clock for the ADN2812 Continuous-
Rate CDR
• AN-769: Generating Multiple Clock Outputs from the
AD9540
• AN-823: Direct Digital Synthesizers in Clocking
Applications Time
• AN-837: DDS-Based Clock Jitter Performance vs. DAC
Reconstruction Filter Performance
• AN-843: Measuring a Loudspeaker Impedance Profile
Using the AD5933
• AN-847: Measuring a Grounded Impedance Profile Using
the AD5933
• AN-851: A WiMax Double Downconversion IF Sampling
Receiver Design
• AN-927: Determining if a Spur is Related to the DDS/DAC
or to Some Other Source (For Example, Switching
Supplies)
• AN-939: Super-Nyquist Operation of the AD9912 Yields a
High RF Output Signal
• AN-953: Direct Digital Synthesis (DDS) with a
Programmable Modulus
Data Sheet
• AD9953: 400 MSPS 14-Bit, 1.8V CMOS Direct Digital
Synthesizer with 1024x32 Frequency/Phase Word RAM
Data Sheet
Product Highlight



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• Introducing Digital Up/Down Converters: VersaCOMM™
Reconfigurable Digital Converters
Technical Books
• A Technical Tutorial on Digital Signal Synthesis, 1999
Tools and Simulations
• ADIsimDDS (Direct Digital Synthesis)
Reference Materials
Product Selection Guide
• RF Source Booklet
Technical Articles
• 400-MSample DDSs Run On Only +1.8 VDC
• ADI Buys Korean Mobile TV Chip Maker
• Basics of Designing a Digital Radio Receiver (Radio 101)
• Clock Requirements For Data Converters
• DDS Applications
• DDS Circuit Generates Precise PWM Waveforms
• DDS Design
• DDS Device Produces Sawtooth Waveform
• DDS Device Provides Amplitude Modulation
• DDS IC Initiates Synchronized Signals
• DDS IC Plus Frequency-To-Voltage Converter Make Low-
Cost DAC
• DDS Simplifies Polar Modulation
• Digital Potentiometers Vary Amplitude In DDS Devices
• Digital Up/Down Converters: VersaCOMM™ White Paper
• Digital Waveform Generator Provides Flexible Frequency
Tuning for Sensor Measurement
• Improved DDS Devices Enable Advanced Comm Systems
• Integrated DDS Chip Takes Steps To 2.7 GHz
• Simple Circuit Controls Stepper Motors
• Speedy A/Ds Demand Stable Clocks
• Synchronized Synthesizers Aid Multichannel Systems
• The Year of the Waveform Generator
• Two DDS ICs Implement Amplitude-shift Keying
• Video Portables and Cameras Get HDMI Outputs
Design Resources
• AD9953 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all AD9953 EngineerZone Discussions
Sample and Buy
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Technical Support
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number
* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet. Note: Dynamic changes to
the content on this page does not constitute a change to the revision number of the product data sheet. This content may be
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AD9953
TABLE OF CONTENTS
Features .............................................................................................. 1 
Applications....................................................................................... 1 
Revision History ............................................................................... 2 
General Description ......................................................................... 3 
Electrical Specifications ................................................................... 4 
Absolute Maximum Ratings............................................................ 6 
ESD Caution.................................................................................. 6 
Pin Configuration............................................................................. 7 
Pin Function Descriptions .............................................................. 8 
Typical Performance Characteristics ............................................. 9 
Theory of Operation ...................................................................... 12 
REVISION HISTORY
5/09—Rev. 0 to Rev. A
Changes to Absolute Maximum Ratings Section......................... 6
Changes to Table 3............................................................................ 8
Changes to Table 5.......................................................................... 14
Changes to Figure 22...................................................................... 25
Changes to Serial Port Operation Section................................... 25
Changes to Serial Interface Port Pin Description Section ........ 27
Changes to Figure 29...................................................................... 29
Updated Outline Dimensions ....................................................... 30
Changes to Ordering Guide .......................................................... 30
1/04—Revision 0: Initial Version
Component Blocks..................................................................... 12 
Modes of Operation ................................................................... 19 
Programming AD9953 Features .............................................. 22 
Serial Port Operation................................................................. 25 
Instruction Byte .......................................................................... 27 
Serial Interface Port Pin Description....................................... 27 
MSB/LSB Transfers .................................................................... 27 
Suggested Application Circuits..................................................... 29 
Outline Dimensions ....................................................................... 30 
Ordering Guide .......................................................................... 30 
Rev. A | Page 2 of 32



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