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AD9873JS

更新时间： 2024-02-02 01:55:06
品牌 Logo 应用领域
亚德诺 - ADI 转换器调制解调器电缆调制解调器
页数 文件大小 规格书
39页 932K
描述
Analog Front End Converter for Set-Top Box, Cable Modem

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AD9873JS 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：QFP包装说明：METRIC, QFP-100
针数：100Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.82JESD-30 代码：R-PQFP-G100
JESD-609代码：e0长度：20 mm
功能数量：1端子数量：100
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：QFP
封装等效代码：QFP100,.7X.9封装形状：RECTANGULAR
封装形式：FLATPACK峰值回流温度（摄氏度）：220
电源：3.3 V认证状态：Not Qualified
座面最大高度：3.4 mm子类别：Modems
标称供电电压：3.3 V表面贴装：YES
技术：CMOS电信集成电路类型：TELECOM CIRCUIT
温度等级：COMMERCIAL端子面层：Tin/Lead (Sn85Pb15)
端子形式：GULL WING端子节距：0.65 mm
端子位置：QUAD处于峰值回流温度下的最长时间：30
宽度：14 mm

AD9873JS 数据手册

 浏览型号AD9873JS的Datasheet PDF文件第2页浏览型号AD9873JS的Datasheet PDF文件第3页浏览型号AD9873JS的Datasheet PDF文件第4页浏览型号AD9873JS的Datasheet PDF文件第5页浏览型号AD9873JS的Datasheet PDF文件第6页浏览型号AD9873JS的Datasheet PDF文件第7页 
Analog Front End Converter for  
Set-Top Box, Cable Modem  
a
AD9873  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Low-Cost 3.3 V CMOS Analog Front End Converter for  
MCNS-DOCSIS, DVB, DAVIC-Compliant  
Set-Top Box, Cable Modem Applications  
232 MHz Quadrature Digital Upconverter  
DC to 65 MHz Output Bandwidth  
AD9873  
COS  
Tx IQ  
12  
INTERPOLATOR  
FILTER  
INV  
Tx  
Tx  
DAC  
3
SINC  
Tx SYNC  
SIN  
12-Bit Direct IF D/A Converter (TxDAC+®)  
Programmable Reference Clock Multiplier (PLL)  
Direct Digital Synthesis  
CA  
PLL  
DDS  
12  
12  
4
SDELTA0  
SDELTA1  
SERIAL ITF  
PROFILE  
Interpolator  
SIN(x)/x Compensation Filter  
CONTROL FUNCTIONS  
2
REF CLK  
Four Programmable, Pin-Selectable Modulator Profiles  
Single-Tone Mode for Frequency Synthesis Applications  
12-Bit, 33 MSPS Sampling Direct IF A/D Converter with  
Auxiliary Automatic Clamp Video Input Multiplexer  
10-Bit, 33 MSPS Sampling Direct IF A/D Converter  
Dual 8-Bit, 16.5 MSPS Sampling IQ A/D Converter  
Two Independently Programmable Sigma-Delta  
Converters  
8
8
I
ADC  
IN  
Q
IN  
Rx IQ  
Rx IF  
Rx SYNC  
ADC  
ADC  
Rx  
10  
IF10  
IF12  
12  
Direct Interface to AD8321/AD8323 PGA Cable Driver  
Programmable Frequency Output  
MUX  
ADC  
VIDEO  
Power-Down Modes  
APPLICATIONS  
Cable and Satellite Systems  
PC Multimedia  
Digital Communications  
Data and Video Modems  
Cable Modem  
Set-Top Boxes  
Powerline Modem  
Broadband Wireless Communication  
GENERAL DESCRIPTION  
On the receiver side, two 8-bit ADCs are optimized for IQ  
demodulated “out-of band” signals. An on-chip 10-bit ADC  
is typically used as a direct IF input of 256 QAM modulated  
signals in cable modem applications. A second direct IF input  
and an auxiliary video input with automatic programmable clamp  
function are multiplexed to a high-performance 12-bit video ADC.  
The AD9873 integrates a complete 232 MHz quadrature  
digital transmitter and a multichannel receiver with four high-  
performance analog-to-digital converters (ADC) for various  
video and digital data signals. The AD9873 is designed for cable  
modem set-top box applications, where cost, size, power dissi-  
pation, and dynamic performance are critical attributes. A single  
external crystal is used to control all internal conversion and  
data processing cycles.  
The chip’s programmable sigma-delta modulated outputs and  
an output clock may be used to control external components  
such as programmable gain amplifiers (PGA) and mixer stages.  
Three pins provide a direct interface to the AD8321/AD8323  
programmable gain amplifier (PGA) cable driver.  
The transmit section of the AD9873 includes a high-speed  
direct digital synthesizer (DDS), a high-performance, high-speed  
12-bit digital-to-analog converter (DAC), programmable clock  
multiplier circuitry, digital filters, and other digital signal  
processing functions, to form a complete quadrature digital  
up-converter device.  
The AD9873 is available in a space-saving 100-lead MQFP package.  
TxDAC+ is a registered trademark of Analog Devices, Inc.  
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  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 2000  
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