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LTM9002

更新时间： 2024-11-13 05:44:07
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
28页 345K
描述
14-Bit Dual-Channel IF/Baseband Receiver Subsystem

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LTM9002 数据手册

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LTM9002  
14-Bit Dual-Channel IF/  
Baseband Receiver Subsystem  
FEATURES  
DESCRIPTION  
The LTM®9002 is a 14-bit dual-channel IF receiver sub-  
system. Utilizing an integrated system in a package (SiP)  
technology, it includes a dual high-speed 14-bit A/D con-  
verter, matching network, anti-aliasing filter and two low  
noise, differential amplifiers. It is designed for digitizing  
widedynamicrangesignalswithanintermediatefrequency  
(IF) up to 300MHz. The amplifiers allow either AC- or DC-  
coupled input drive. Lowpass or bandpass filter networks  
can be implemented with various bandwidths. Contact  
Linear Technology regarding customization.  
n
Integrated Dual 14-Bit, High-Speed ADC, Passive  
Filters and Fixed Gain Differential Amplifiers  
n
Up to 300MHz IF Range  
Lowpass and Bandpass Filter Versions  
Integrated Low Noise, Low Distortion Amplifiers  
n
Fixed Gain: 8dB, 14dB, 20dB or 26dB  
50Ω, 200Ω or 400Ω Input Impedance  
n
Integrated Bypass Capacitance, No External  
Components Required  
n
66dB SNR Up to 140MHz Input (LTM9002-AA)  
n
76dB SFDR Up to 140MHz Input (LTM9002-AA)  
The LTM9002 is perfect for demanding communications  
applications,withACperformancethatincludes66dBSNR  
and 76dB spurious free dynamic range (SFDR). Auxiliary  
DACs allow gain balancing between channels.  
n
Auxiliary 12-Bit DACs for Gain Adjustment  
n
Clock Duty Cycle Stabilizer  
Single 3V to 3.3V Supply  
n
n
Low Power: 1.3W (665mW/ch.)  
n
A single 3V supply allows low power operation. A separate  
outputsupplyallowstheoutputstodrive0.5Vto3.3Vlogic.  
An optional multiplexer allows both channels to share a  
digital output bus. Two single-ended CLK inputs can be  
driven together or independently. An optional clock duty  
cycle stabilizer allows high performance at full speed for  
a wide range of clock duty cycles.  
Shutdown and Nap Modes  
n
15mm × 11.25mm LGA Package  
APPLICATIONS  
n
Telecommunications  
n
Direct Conversion Receivers  
n
Main and Diversity Receivers  
Cellular Base Stations  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
n
TYPICAL APPLICATION  
Dual Channel IF Receiver  
64k Point FFT, fIN = 15MHz, –1dBFS,  
SENSE = VDD, Channel A (LTM9002-LA)  
V
CC  
= 3V  
V
DD  
0
OV  
DD  
0.5V TO 3.6V  
–10  
–20  
V
REF  
–30  
+
–
INA  
–40  
MAIN  
RF  
14-BIT  
125Msps ADC  
FILTER  
DAC  
SAW  
INA  
–50  
–60  
LO  
CLKOUT  
–70  
ADC CLK  
SPI  
MUX  
OF  
DIFFERENTIAL  
AMPLIFIERS  
–80  
–90  
DAC  
–100  
–110  
–120  
+
INB  
14-BIT  
125Msps ADC  
DIVERSITY  
RF  
FILTER  
SAW  
–
INB  
0
5
10  
15  
20  
25  
30  
LO  
FREQUENCY (MHz)  
9002 TA01b  
9002 TA01  
OGND  
GND  
9002f  
1
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