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LT5516

更新时间： 2024-11-12 14:58:07
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
12页 199K
描述
800MHz 至 1.5GHz 直接转换正交解调器

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中文翻译

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LT5516 数据手册

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LT5516  
800MHz to 1.5GHz Direct  
Conversion Quadrature Demodulator  
U
DESCRIPTIO  
FEATURES  
■
Frequency Range: 800MHz to 1.5GHz  
High IIP3: 21.5dBm at 900MHz  
High IIP2: 52dBm  
Noise Figure: 12.8dB at 900MHz  
Conversion Gain: 4.3dB at 900MHz  
I/Q Gain Mismatch: 0.2dB  
Shutdown Mode  
The LT®5516 is an 800MHz to 1.5GHz direct conversion  
quadrature demodulator optimized for high linearity re-  
ceiver applications. It is suitable for communications  
receiverswhereanRForIFsignalisdirectlyconvertedinto  
I and Q baseband signals with bandwidth up to 260MHz.  
The LT5516 incorporates balanced I and Q mixers, LO  
buffer amplifiers and a precision, high frequency quadra-  
ture generator.  
■
■
■
■
■
■
■
16-Lead QFN 4mm × 4mm Package  
with Exposed Pad  
In an RF receiver, the high linearity of the LT5516 provides  
excellent spur-free dynamic range, even with fixed gain  
front end amplification. This direct conversion receiver  
can eliminate the need for intermediate frequency (IF)  
signal processing, as well as the corresponding require-  
ments for image filtering and IF filtering. Channel filtering  
can be performed directly at the outputs of the I and Q  
channels. These outputs can interface directly to channel-  
select filters (LPFs) or to a baseband amplifier.  
U
APPLICATIO S  
■
Cellular/PCS/UMTS Infrastructure  
■
High Linearity Direct Conversion I/Q Receiver  
■
High Linearity I/Q Demodulator  
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
U
TYPICAL APPLICATIO  
I/Q Output Power, IM3 vs  
RF Input Power  
5V  
BPF  
BPF  
V
CC  
LT5516  
+
+
RF  
20  
LNA  
LPF  
I
OUT  
VGA  
VGA  
0
–20  
–
I
P
OUT  
OUT  
0°  
–
+
RF  
LO  
DSP  
–40  
LO INPUT  
ENABLE  
IM3  
+
LPF  
V
= 5v  
Q
Q
CC  
= 25°C  
OUT  
–60  
T
A
0°/90°  
P
LO  
= –10dBm  
= 901MHz  
= 899.9MHz  
–
OUT  
f
f
f
LO  
RF1  
RF2  
–80  
90°  
–
LO  
EN  
= 900.1MHz  
–100  
5516 F01  
–18  
–14  
–10  
–6  
–2  
2 6  
RF INPUT POWER (dBm)  
5516 TA01  
Figure 1. High Signal-Level I/Q Demodulator for Wireless Infrastructure  
5516fa  
1
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