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LT5502EGN#TR PDF预览

LT5502EGN#TR

更新时间： 2024-01-02 23:07:42
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
12页 239K
描述
LT5502 - 400MHz Quadrature IF Demodulator with RSSI; Package: SSOP; Pins: 24; Temperature Range: -40°C to 85°C

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中文翻译

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LT5502EGN#TR 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active针数：24
Reach Compliance Code：compliant风险等级：5.27
特性阻抗：50 Ω构造：COMPONENT
最大输入功率 (CW)：10 dBmJESD-609代码：e3
调制技术：QUADRAPHASE最大工作频率：400 MHz
最小工作频率：70 MHz最高工作温度：85 °C
最低工作温度：-40 °C射频/微波设备类型：DEMODULATOR
端子面层：Matte Tin (Sn)

LT5502EGN#TR 数据手册

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Final Electrical Specifications  
LT5502  
400MHz Quadrature  
IF Demodulator with RSSI  
January 2001  
U
DESCRIPTIO  
FEATURES  
TheLT®5502isa70MHzto400MHzmonolithicintegrated  
quadrature IF demodulator. It consists of an IF limiter,  
quadrature down mixers, integrated lowpass filters, and  
divide-by-two LO buffers. The demodulator provides all  
building blocks for demodulation of I and Q baseband  
signals with a single supply voltage of 1.8V to 5.25V. The  
IFlimiterhas84dBsmall-signalgain, andabuilt-inreceive  
signal strength indicator (RSSI) with over 90dB linear  
range. The input referred noise-spectral-density is  
1.45nV/√Hz, which is equivalent to a 4dB noise figure  
when the input is terminated with a 50Ω source. The  
integrated lowpass output filters act as antialiasing and  
pulse-shaping filters for demodulated I/Q-baseband sig-  
nals. The 3dB cutoff frequency of the filters is about  
7.7MHz. The VCO frequency is required to be twice the  
desired operating frequency to provide quadrature local  
oscillator (LO) signals to the mixers. The standby mode  
provides fast transient response to the receive mode with  
reduced supply current when the I/Q outputs are  
■
Single 1.8V to 5.25V Supply  
■
IF Frequency Range: 70MHz to 400MHz  
■
84dB Limiting IF Gain  
■
90dB Linear RSSI Range  
■
7.7MHz Lowpass Output Filter  
■
Baseband I/Q Amplitude Imbalance: <0.7dB  
■
4dB Noise Figure  
Low Supply Current: 25mA  
Outputs Biased Up While in Standby  
Shutdown Current: 1µA  
24-Lead Narrow SSOP Package  
■
■
■
■
U
APPLICATIO S  
■
IEEE802.11  
■
High Speed Wireless LAN  
■
Wireless Local Loop  
AC-coupled to a baseband chip.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
I/Q Output Swing, RSSI Output vs IF Input Power  
2V  
C2  
C1  
1200  
1000  
800  
1.2  
1.0  
0.8  
0.6  
0.4  
0.2  
1µF  
1nF  
C3  
22nF  
+
IF  
V
CC  
+
I
OUT  
IF  
INPUT  
R1  
240Ω  
–
–
IF  
BASEBAND  
DIFFERENTIAL  
I/Q OUTPUTS  
I
OUT  
90°  
0°  
+
2XLO  
+
Q
OUT  
600  
2XLO  
INPUT  
÷2  
–
Q
OUT  
–
2XLO  
EN  
400  
RSSI  
LT5502  
GND  
ENABLE  
C4  
1.8pF  
200  
–85  
–55  
–40  
–25  
–10  
5
–70  
5502 TA01a  
IF INPUT POWER (dBm)  
5502 TA01b  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
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