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LT5503

更新时间： 2024-01-25 00:33:41
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
20页 212K
描述
1.2GHz to 2.7GHz Direct IQ Modulator and Mixer

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中文翻译

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LT5503 技术参数

是否Rohs认证：符合生命周期：Obsolete
零件包装代码：TSSOP针数：20
Reach Compliance Code：compliantECCN代码：EAR99
风险等级：5.81Is Samacsys：N
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：I/Q最大工作频率：2700 MHz
最小工作频率：1200 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：MODULATOR
端子面层：Matte Tin (Sn)最大电压驻波比：1.5
Base Number Matches：1

LT5503 数据手册

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Final Electrical Specifications  
LT5503  
1.2GHz to 2.7GHz Direct  
IQ Modulator and Mixer  
U
October 2001  
DESCRIPTIO  
FEATURES  
TheLT®5503isafront-endtransmitterICdesignedforlow  
voltageoperation, andiscompatiblewiththeLTCfamilyof  
WLANproducts. TheICcontainsahighfrequencyquadra-  
ture modulator with a variable gain amplifier (VGA) and a  
balanced mixer. The modulator includes a precision 90°  
phase shifter which allows direct modulation of an RF  
signal by the baseband I and Q signals.  
■
Single 1.8V to 5.25V Supply  
■
Direct IQ Modulator with Integrated 90° Phase  
Shifter*  
■
Four Step RF Power Control  
■
120MHz Modulation Bandwidth  
■
Independent Double-Balanced Mixer  
■
Modulation Accuracy Insensitive to Carrier Input  
Power  
In a superheterodyne system, the mixer can be used to  
generatethehigh-frequencyRFinputforthemodulatorby  
mixing the system’s 1st and 2nd local oscillators.  
■
Modulator I/Q Inputs Internally Biased  
U
APPLICATIO S  
■
The LT5503 modulator output delivers –3dBm at 2.5GHz.  
The VGA allows output power reduction in three steps up  
to 13dB with digital control. The baseband inputs are  
internally biased for maximum input voltage swing at low  
supply voltage. If needed, they can be driven with external  
bias voltages.  
IEEE 802.11 DSSS and FHSS  
■
High Speed Wireless LAN (WLAN)  
■
Wireless Local Loop (WLL)  
■
PCS Wireless Data  
■
MMDS  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
*Patent Pending  
U
TYPICAL APPLICATIO  
2.45GHz  
BPF  
2.45GHz Modulated Output  
Power vs Supply Voltage  
V
CC1  
V
CC2  
2V  
2V  
–2  
–3  
–4  
–5  
–6  
+
–
BQ BQ  
–
+
V
LO2 V LO1  
MODIN  
V
RF  
V MOD  
CC  
MX  
V
VGA  
MX  
CC CC  
CC  
CC  
MIXER  
MIXEN  
ENABLE  
MODULATOR  
ENABLE  
LO2IN  
(750MHz)  
MODEN  
LO2  
MODOUT  
VGA  
0°  
÷2  
P
P
= –12dBm  
= –18dBm  
LO1  
LO2  
90°  
÷1  
BASEBAND = 1V  
P-P  
T
= 27°C  
A
CONTROL  
LOGIC  
1.8  
2.4  
3.0  
3.6  
4.2  
4.8  
5.4  
SUPPLY VOLTAGE (V)  
GC1  
GND  
GC2  
DMODE  
LO1  
2.45GHz  
MODULATED  
RFOUT  
5503 TA01b  
5503 F01  
+
–
LO1IN (2075MHz)  
BI BI  
Figure 1. 2.45GHz Transmitter Application, Carrier for Modulator Generated by Upmixer  
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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中文翻译

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