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AD8348XXX

更新时间： 2024-02-03 02:36:54
品牌 Logo 应用领域
亚德诺 - ADI 电信集成电路蜂窝电话电路电信电路光电二极管
页数 文件大小 规格书
13页 775K
描述
50-1000 MHz Quadrature Demodulator

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AD8348XXX 技术参数

是否Rohs认证：不符合生命周期：Obsolete
零件包装代码：SSOP包装说明：TSSOP-28
针数：28Reach Compliance Code：compliant
HTS代码：8542.39.00.01风险等级：5.67
Is Samacsys：NJESD-30 代码：R-PDSO-G28
JESD-609代码：e0长度：9.7 mm
功能数量：1端子数量：28
最高工作温度：85 °C最低工作温度：-34 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：1.1 mm标称供电电压：5 V
表面贴装：YES电信集成电路类型：RF AND BASEBAND CIRCUIT
温度等级：OTHER端子面层：TIN LEAD
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4.4 mmBase Number Matches：1

AD8348XXX 数据手册

 浏览型号AD8348XXX的Datasheet PDF文件第2页浏览型号AD8348XXX的Datasheet PDF文件第3页浏览型号AD8348XXX的Datasheet PDF文件第4页浏览型号AD8348XXX的Datasheet PDF文件第5页浏览型号AD8348XXX的Datasheet PDF文件第6页浏览型号AD8348XXX的Datasheet PDF文件第7页 
PRELIMINARY TECHNICAL DATA  
50–1000 MHz  
a
Quadrature Demodulator  
Preliminary Technical Data  
AD8348  
Features  
Integrated I/Q demodulator with IF VGA Amplifier  
Operating IF Frequency 50–1000 MHz  
(3dB IF BW of 500MHz driven from Rs=200ohms)  
Demodulation Bandwidth 60MHz  
Linear-in-dB AGC Range 45dB  
Third Order Intercept  
Functional Block Diagram  
IIP3 +26 dBm @ min gain (FIF=450MHz)  
IIP3 -7 dBm @ max gain (FIF=450MHz)  
Quadrature Demodulation Accuracy  
Phase Accuracy 0.6o RMS  
Amplitude Balance 0.3 dB  
Noise Figure 12.5dB @ max gain (FIF=500MHz)  
LO Input -10 dBm  
Single Supply 2.7-5.5V  
Power down mode  
Compact 28-pin TSSOP package  
Applications  
QAM/QPSK Demodulator  
W-CDMA/CDMA/GSM/NADC  
Wireless Local Loop  
LMDS/MMDS  
General Description  
The AD8348 is a broadband quadrature demodulator with an  
integrated intermediate frequency (IF) variable-gain amplifier  
(VGA) and integrated baseband amplifiers. It is suitable for  
use in communications receivers, performing quadrature  
demodulation from IF directly to baseband frequencies. The  
baseband amplifiers have been designed to directly interface  
with dual channel A-to-D converters such as the AD9201,  
AD9283, and AD9218 for digitizing and post-processing.  
Separate I & Q-channel baseband amplifiers follow the  
baseband outputs of the mixers. The DC common-mode  
voltage level at the baseband outputs is set by the voltage  
applied to the VCMO pin. Typically VCMO is connected to  
the internal VREF voltage but it can also be connected to an  
external voltage. This flexibility allows the user to maximize  
the input dynamic range to the A-to-D converter. Connecting  
a bypass capacitor at each offset compensation input (IOFS &  
QOFS) nulls DC offsets produced in the mixer. Offset  
compensation can be overridden by applying an external  
voltage at the offset compensation inputs.  
The IF input signal is fed into two Gilbert-cell mixers through  
an X-AMP VGA. The IF VGA provides 45dB of gain  
control. A precision gain-control circuit sets a linear-in-dB  
gain characteristic for the VGA and provides temperature  
compensation. The LO quadrature phase splitter employs a  
divide-by-two frequency divider to achieve high quadrature  
accuracy and amplitude balance over the entire operating fre-  
quency range.  
The mixers’ outputs are brought off-chip for optional filtering  
before final amplification. Inserting a channel selection filter  
before each baseband amplifier increases the baseband  
amplifiers’ signal handling range by reducing the amplitude of  
high-level, out-of-channel interferers before the baseband  
signal is fed into the baseband amplifiers. The single-ended  
mixer output is amplified and converted to a differential signal  
for driving ADCs.  
Optionally, the IF VGA can be disabled and bypassed. In this  
mode, the IF signal is applied directly to the quadrature mixer  
inputs via pins MXIP and MXIN.  
Rev. PrF 2/11/03  
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., 2003  
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