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參數資料
| 型號： | AD9854 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | XO, clock |
| 英文描述： | CMOS 300MHz Quadrature Complete-DDS |
| 中文描述： | 300MHz CMOS正交DDS數字合成器 |
| 文件頁數： | 2/28頁 |
| 文件大小： | 589K |
| 代理商： | AD9854 |
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AD9854 PRELIMINARY TECHNICAL DATA
_____________________________________________________________________________________________________
7/16/99 REV.PRA
2
GENERAL DESCRIPTION
The AD9854 digital synthesizer is a highly integrated device that
uses advanced DDS technology, coupled with (2) internal high-
speed, high performance quadrature D/A converters and
comparator to form a digitally-programmable I & Q synthesizer
function. When referenced to an accurate clock source, the
AD9854 generates a highly stable, frequency, phase and
amplitude programmable sine and cosine outputs that can be used
as an agile L.O. in communications, radar, and many other
applications. The AD9854's innovative high-speed DDS core
provides 48-bit frequency resolution (1 microHertz tuning steps).
Phase truncation to 17-bits assures excellent digital SFDR. The
AD9854's circuit architecture allows the generation of
simultaneous quadrature outputs at frequencies up to 150 MHz,
which can be digitally tuned at a rate of up to 100 million new
frequencies per second. The (externally filtered) sine wave output
can be converted to a square wave by the internal comparator for
agile clock generator applications. The device provides 14-bits of
digitally-controlled phase modulation and single-pin PSK. The
on-board 12-bit I & Q DACs, coupled with the innovative DDS
architecture, provide excellent wideband and narrowband output
SFDR. The Q-DAC can also be configured as a user-
programmable control DAC if the quadrature function is not
desired. When configured with the on-board comparator, the 12-
bit control DAC facilitates pulse-width modulation (PWM) and
static duty cycle control, in the high-speed clock generator
application. Two 12-bit digital multipliers permit programmable
amplitude modulation, shaped on-off keying and precise amp-
litude control of the quadrature outputs. The AD9854’
programmable 4
×
- 20
×
REFCLK Multiplier circuit generates the
300 MHz clock internally from a lower frequency external
reference clock. This saves the user the expense and difficulty of
implementing a 300 MHz clock source. Direct 300 MHz clocking
is also accommodated with either single-ended or differential
inputs. Single-pin conventional FSK and the enhanced spectral
qualities of “amped”FSK are supported. The AD9854 uses
advanced .35 micron CMOS technology to provide this high level
of functionality on a single +3.3 V supply.
The AD9854 is available in a space-saving 80-pin QFP surface
mount package. The AD9854 is pin-for-pin compatible with the
AD9852 single-tone synthesizer. It is specified to operate over
the extended industrial temperature range of -40°to +85°C.
Preliminary Pin Assignments
1
3
4
5
6
7
8
9
10
11
12
13
14
15
16
I/O UD
D5
D4
D3
D2
D1
D0
DGND
W
DGND
DVDD
2
D6
D7
17
18
19
20
R
65
66
67
68
69
70
71
72
73
74
75
76
A
S
D
R
D
M
77
78
79
80
R
D
D
61
62
63
64
P
A
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
AGND
nc
AGND
IOUT1
IOUT1B
AVDD
IOUT2B
IOUT2
A
DACBP
DAC Rset
A
44
43
42
41
VINP
23
24
25
26
27
28
29
30
31
32
33
34
35
36
V
VINN
A5
A4
A3
A2/IO RESET
A1/SDO
A0/SDIO
n
D
D
37
38
39
40
A
A
A
PIN 1
IDENTIFIER
TOP VIEW
(Not to Scale)
80-PIN LQFP 14 x 14 x 1.4
AD9854
DVDD
nc
D
D
22
21
D
D
A
A
A
A
AGND
AGND
AVDD
AGND
AGND
AVDD
AVDD
nc
n
D
A
D
D
D
D
D
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD9854/PCB | 制造商:Analog Devices 功能描述:Evaluation Board For IC Digital Synthesizer Single 制造商:Analog Devices 功能描述:Direct Digital Synthesizer IC (DDS) |
| AD9854/PCBZ | 功能描述:BOARD EVAL FOR AD9854 RoHS:是 類別:編程器，開發系統 >> 評估演示板和套件 系列:AgileRF™ 標準包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
| AD9854ASQ | 制造商:Analog Devices 功能描述:IC DDS SYNTHESIZER |
| AD9854ASQZ | 制造商:Analog Devices 功能描述:Direct Digital Synthesizer 300MHz 2-DAC 12-Bit Parallel/Serial 80-Pin LQFP 制造商:Analog Devices 功能描述:Communication IC |
| AD9854AST | 制造商:Analog Devices 功能描述:Direct Digital Synthesizer 300MHz 2-DAC 12-Bit Parallel/Serial 80-Pin LQFP Tray 制造商:Rochester Electronics LLC 功能描述:200 MHZ QUADRATURE DDS SYNTHESIZER - Tape and Reel 制造商:Analog Devices 功能描述:IC SEMICONDUCTOR ((NS)) |
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