AD9911 Datasheet, PDF (1/44 Pages) Analog Devices – 500 MSPS Direct Digital Synthesizer with 10-Bit DAC

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. 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: [phone]
www.analog.com
Fax: [phone]
©2006 Analog Devices, Inc. All rights reserved.