参数资料
型号: AD9858/PCBZ
厂商: Analog Devices Inc
文件页数: 1/32页
文件大小: 0K
描述: BOARD EVAL FOR AD9858
产品培训模块: Direct Digital Synthesis Tutorial Series (1 of 7): Introduction
Direct Digital Synthesizer Tutorial Series (7 of 7): DDS in Action
Direct Digital Synthesis Tutorial Series (3 of 7): Angle to Amplitude Converter
Direct Digital Synthesis Tutorial Series (6 of 7): SINC Envelope Correction
Direct Digital Synthesis Tutorial Series (4 of 7): Digital-to-Analog Converter
Direct Digital Synthesis Tutorial Series (2 of 7): The Accumulator
设计资源: Low Jitter Sampling Clock Generator for High Performance ADCs Using AD9958/9858 and AD9515 (CN0109)
标准包装: 1
主要目的: 计时,直接数字合成(DDS)
已用 IC / 零件: AD9858/TL
已供物品:
其它名称: AD9858/PCB
AD9858/PCB-ND
1 GSPS Direct Digital Synthesizer
AD9858
Rev. C
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
2003–2009 Analog Devices, Inc. All rights reserved.
FEATURES
1 GSPS internal clock speed
Up to 2 GHz input clock (selectable divide-by-2)
Integrated 10-bit DAC
Excellent phase noise and SFDR
32-bit programmable frequency register
Simplified 8-bit parallel and SPI serial control interface
Automatic frequency sweeping capability
4 frequency profiles
3.3 V power supply
Power dissipation: 2 W typical
Integrated programmable charge pump and phase
frequency detector with fast lock circuit
Isolated charge pump supply up to 5 V
Integrated 2 GHz mixer
APPLICATIONS
VHF/UHF LO synthesis
Tuners
Instrumentation
Agile clock synthesis
Cellular base station hopping synthesizers
Radars
SONET/SDH clock synthesis
GENERAL DESCRIPTION
The AD9858 is a direct digital synthesizer (DDS) featuring a
10-bit digital-to-analog converter (DAC) operating up to 1 GSPS.
The AD9858 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 sine wave at up to
400 MHz. The AD9858 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 AD9858 via parallel (8-bit) or serial loading formats. The
AD9858 contains an integrated charge pump (CP) and phase
frequency detector (PFD) for synthesis applications requiring
the combination of a high speed DDS along with phase-locked
loop (PLL) functions. An analog mixer is also provided on chip
for applications requiring the combination of a DDS, PLL, and
mixer, such as frequency translation loops and tuners. The AD9858
also features a divide-by-2 on the clock input, allowing the external
reference clock to be as high as 2 GHz.
The AD9858 is specified to operate over the extended industrial
temperature range of –40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
03
16
6-
0
01
ANALOG
MULTIPLIER
PHASE ACCUMULATOR
DIV
LO
IF
RF
PD
CP
CPISET
RESET
DACISET
IOUT
FUD
SYNCLK
REFCLK
I/O PORT
(SER/PAR)
DIGITAL PLL
DE
L
T
A
F
RE
Q
UE
NCY
WOR
D
DE
L
T
A
F
RE
Q
UE
NCY
R
AM
P
RAT
E
F
RE
Q
UE
NCY
A
CCUM
UL
AT
O
R
RE
S
E
T
F
RE
Q
UE
NCY
T
U
NI
NG
WOR
D
P
HAS
E
A
CCUM
UL
AT
O
R
RE
S
E
T
SY
N
C
P
HAS
E
OFF
S
E
T
AD
JU
S
T
DAC
SYSCLK
CHARGE
PUMP
POWER-
DOWN
LOGIC
PS0 PS1
PHASE
DETECTOR
TIMING AND CONTROL LOGIC
PHASE-TO-
AMPLITUDE
CONVERSION
÷ M
÷ 8
÷ 2
CONTROL REGISTERS
÷ N
AD9858
15
FREQUENCY ACCUMULATOR
32
14
32
15
10
M
U
X
RF
IF
LO
Figure 1.
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