AD9911 Synthesizer Datasheet

AD9911 Datasheet PDF, Equivalent


Part Number

AD9911

Description

500 MSPS Direct Digital Synthesizer

Manufacture

Analog Devices

Total Page 30 Pages
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AD9911
Data Sheet
500 MSPS Direct Digital Synthesizer
with 10-Bit DAC
AD9911
FEATURES
Patented SpurKiller technology
Multitone generation
Test-tone modulation
Up to 800 Mbps data throughput
Matched latencies for frequency/phase/amplitude changes
Linear frequency/phase/amplitude sweeping capability
Up to 16 levels of FSK, PSK, ASK
Programmable DAC full-scale current
32-bit frequency tuning resolution
14-bit phase offset resolution
10-bit output amplitude-scaling resolution
Software-/hardware-controlled power-down
Multiple device synchronization
Selectable 4× to 20× REF_CLK multiplier (PLL)
Selectable REF_CLK crystal oscillator
56-lead LFCSP
APPLICATIONS
Agile local oscillator
Test and measurement equipment
Commercial and amateur radio exciter
Radar and sonar
Test-tone generation
Fast frequency hopping
Clock generation
GENERAL DESCRIPTION
The AD9911 is a complete direct digital synthesizer (DDS).
This device includes a high speed DAC with excellent wideband
and narrowband spurious-free dynamic range (SFDR) as well as
three auxiliary DDS cores without assigned digital-to-analog
converters (DACs). These auxiliary channels are used for spur
reduction, multitone generation, or test-tone modulation.
The AD9911 is the first DDS to incorporate SpurKiller
technology and multitone generation capability. Multitone
mode enables the generation up to four concurrent carriers;
frequency, phase and amplitude can be independently
programmed. Multitone generation can be used for system
tests, such as inter-modulation distortion and receiver blocker
sensitivity. SpurKilling enables customers to improve SFDR
performance by reducing the magnitude of harmonic
components and/or the aliases of those harmonic components.
Test-tone modulation efficiently enables sine wave modulation
of amplitude on the output signal using one of the auxiliary
DDS cores.
The AD9911 can perform modulation of frequency, phase, or
amplitude (FSK, PSK, ASK). Modulation is implemented by
storing profiles in the register bank and applying data to the
profile pins. In addition, the AD9911 supports linear sweep of
frequency, phase, or amplitude for applications such as radar
and instrumentation.
(continued on Page 3)
500MSPS
DDS CORE
10-BIT DAC
SYSTEM
CLOCK
SOURCE
SPUR REDUCTION/
MODULATION CONTROL
MULTITONE
REF CLOCK
INPUT CIRCUITRY
TIMING AND
CONTROL
RECONSTRUCTED
SINE WAVE
USER INTERFACE
Figure 1. Basic Block Diagram
Rev. A
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AD9911
AD9911
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Functional Block Diagram .............................................................. 3
Specifications..................................................................................... 4
Absolute Maximum Ratings............................................................ 9
ESD Caution.................................................................................. 9
Equivalent Input and Output Circuits....................................... 9
Pin Configuration and Function Descriptions........................... 10
Typical Performance Characteristics ........................................... 12
Application Circuits ....................................................................... 17
Theory of Operation ...................................................................... 18
Primary DDS Core ..................................................................... 18
SpurKiller/Multitone Mode and Test-Tone Modulation....... 18
D/A Converter ............................................................................ 18
Modes of Operation ....................................................................... 19
Single-Tone Mode ...................................................................... 19
SpurKiller/Multitone Mode ...................................................... 19
Test-tone Mode ........................................................................... 20
Reference Clock Modes ............................................................. 20
Scalable DAC Reference Current Control Mode ................... 21
Power-Down Functions............................................................. 21
Shift Keying Modulation ........................................................... 21
Shift Keying Modulation Using SDIO Pins for RU/RD ........ 23
Linear Sweep (Shaped) Modulation Mode ............................. 23
REVISION HISTORY
11/2016—Rev. 0 to Rev. A
Changes to Figure 43 Caption....................................................... 25
Updated Outline Dimensions ....................................................... 41
5/2006—Revision 0: Initial Version
Data Sheet
Linear Sweep No Dwell Mode .................................................. 25
Sweep and Phase Accumulator Clearing Functions .............. 26
Output Amplitude Control ....................................................... 26
Synchronizing Multiple AD9911 Devices................................... 28
Operation .................................................................................... 28
Automatic Mode Synchronization ........................................... 28
Manual Software Mode Synchronization................................ 28
Manual Hardware Mode Synchronization.............................. 28
I/O_Update, SYNC_CLK, and System Clock Relationships 29
I/O Port............................................................................................ 30
Overview ..................................................................................... 30
Instruction Byte Description .................................................... 30
I/O Port Pin Description........................................................... 31
I/O Port Function Description ................................................. 31
MSB/LSB Transfer Description ................................................ 31
I/O Modes of Operation............................................................ 31
Register Maps.................................................................................. 35
Control Register Map ................................................................ 35
Channel Register Map ............................................................... 36
Profile Register Map................................................................... 37
Control Register Descriptions ...................................................... 38
Channel Select Register (CSR) ................................................. 38
Channel Function Register (CFR) Description...................... 39
Outline Dimensions ....................................................................... 41
Ordering Guide .......................................................................... 41
Rev. A | Page 2 of 41


Features Data Sheet 500 MSPS Direct Digital Synt hesizer with 10-Bit DAC AD9911 FEATURE S Patented SpurKiller technology Multit one generation Test-tone modulation Up to 800 Mbps data throughput Matched lat encies for frequency/phase/amplitude ch anges Linear frequency/phase/amplitude sweeping capability Up to 16 levels of FSK, PSK, ASK Programmable DAC full-sca le current 32-bit frequency tuning reso lution 14-bit phase offset resolution 1 0-bit output amplitude-scaling resoluti on Software-/hardware-controlled power- down Multiple device synchronization Se lectable 4× to 20× REF_CLK multiplier (PLL) Selectable REF_CLK crystal oscil lator 56-lead LFCSP APPLICATIONS Agile local oscillator Test and measurement e quipment Commercial and amateur radio e xciter Radar and sonar Test-tone genera tion Fast frequency hopping Clock gener ation GENERAL DESCRIPTION The AD9911 i s a complete direct digital synthesizer (DDS). This device includes a high spe ed DAC with excellent wideband and narrowband spurious-free dyn.
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