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AD9859 Arkusz danych(PDF) 1 Page - Analog Devices

Numer części AD9859
Szczegółowy opis  400 MSPS, 10-Bit, 1.8 V CMOS Direct Digital Synthesizer
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Strona internetowa  http://www.analog.com
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AD9859 Arkusz danych(HTML) 1 Page - Analog Devices

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400 MSPS, 10-Bit, 1.8 V CMOS
Direct Digital Synthesizer
AD9859
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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
©2004–2009 Analog Devices, Inc. All rights reserved.
FEATURES
400 MSPS internal clock speed
Integrated 10-bit DAC
32-bit tuning word
Phase noise ≤ –120 dBc/Hz @ 1 kHz offset (DAC output)
Excellent dynamic performance
>75 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
APPLICATIONS
Agile LO frequency synthesis
Programmable clock generators
Test and measurement equipment
Commercial and amateur radio exciter
GENERAL DESCRIPTION
The AD9859 is a direct digital synthesizer (DDS) featuring a
10-bit DAC operating at up to 400 MSPS. The AD9859 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 AD9859 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 AD9859 via a serial I/O port.
The AD9859 is specified to operate over the extended industrial
temperature range of –40°C to +105°C
FUNCTIONAL BLOCK DIAGRAM
COS(X)
CONTROL REGISTERS
OSCILLATOR/BUFFER
SYNC
ENABLE
I/O UPDATE
DAC_RSET
DDS CORE
PHASE
OFFSET
PHASE
ACCUMULATOR
Z–1
Z–1
IOUT
IOUT
OSK
PWRDWNCTL
REFCLK
REFCLK
CRYSTAL OUT
I/O PORT
DAC
SYSTEM
CLOCK
SYSTEM
CLOCK
SYNC_IN
SYNC_CLK
RESET
TIMING AND CONTROL LOGIC
4
–20
CLOCK
MULTIPLIER
÷ 4
AD9859
32
14
10
14
19
32
10
0
M
U
X
M
U
X
Figure 1.


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