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LT5511 PDF预览

LT5511

更新时间: 2024-01-06 02:25:35
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
12页 210K
描述
40MHz to 900MHz Quadrature Demodulator

LT5511 技术参数

是否Rohs认证: 不符合生命周期:Contact Manufacturer
Reach Compliance Code:unknown风险等级:5.85
颜色@波长:Red最大正向电压:3 V
JESD-609代码:e0透镜类型:DIFFUSED
最高工作温度:85 °C最低工作温度:-40 °C
总高度:8.6 mm峰值波长:700 nm
最大反向电压:5 V子类别:Visible LEDs
端子面层:Tin/Lead (Sn/Pb)Base Number Matches:1

LT5511 数据手册

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LT5517  
40MHz to 900MHz  
Quadrature Demodulator  
U
FEATURES  
DESCRIPTIO  
The LT®5517 is a 40MHz to 900MHz quadrature demodu-  
lator optimized for high linearity receiver applications  
where high dynamic range is important. It is suitable for  
communications receivers where an RF or IF signal is  
directly converted into I and Q baseband signals with a  
bandwidth up to 130MHz. The LT5517 incorporates bal-  
ancedIandQmixers, LObufferamplifiersandaprecision,  
broadband quadrature generator derived from an on-chip  
divide-by-two circuit.  
RF Input Frequency Range: 40MHz to 900MHz  
High IIP3: 21dBm at 800MHz  
High IIP2: 58dBm at 800MHz  
I/Q Gain Mismatch: 0.3dB Max  
I/Q Phase Mismatch: 0.7°  
Noise Figure: 12.4dB at 800MHz  
Conversion Gain: 3.3dB at 800MHz  
Baseband Bandwidth: 130MHz  
Single Ended, 50Matched 2XLO Input  
Shutdown Mode  
The superior linearity and low noise performance of the  
LT5517 is achieved across its full frequency range. A well-  
balanceddivide-by-twocircuitgeneratesprecisionquadra-  
ture LO carriers to drive the I mixer and the Q mixer.  
Consequently, the outputs of the I-channel and the  
Q-channelarewellmatchedinamplitude,andtheirphases  
are 90° apart. The LT5517 also provides excellent 50Ω  
impedance matching at the 2XLO port across its entire  
frequency range.  
16-Lead QFN (4mm × 4mm) Package  
with Exposed Pad  
U
APPLICATIO S  
Wireless Infrastructure  
High Linearity Direct Conversion I/Q Receiver  
High Linearity I/Q Demodulator  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
I/Q Output Power, IM3, IM2  
vs RF Input Power  
5V  
BPF  
BPF  
20  
V
CC  
LT5517  
+
RF  
RF  
LNA  
+
LPF  
I
I
OUT  
OUT  
0
VGA  
VGA  
P
OUT  
–20  
–40  
0°  
T
= 25°C  
2XLO  
= 1602MHz  
= 799.9MHz  
= 800.1MHz  
A
P
f
= –10dBm  
2XLO  
RF1  
RF2  
DSP  
IM3  
f
f
–60  
–80  
+
LPF  
Q
Q
OUT  
IM2  
2xLO  
EN  
2xLO  
INPUT  
÷2  
OUT  
90°  
ENABLE  
5517 F01  
–100  
–18  
–14  
–10  
–6  
–2  
2
RF INPUT POWER (dBm)  
Figure 1. High Signal-Level I/Q Demodulator for 450MHz Infrastructure Receiver  
5517 F01b  
5517f  
1

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