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LTC1758-2EMS PDF预览

LTC1758-2EMS

更新时间： 2024-11-18 22:55:51
品牌 Logo 应用领域
凌特 - Linear 电信集成电路电信电路光电二极管控制器
页数 文件大小 规格书
16页 207K
描述
RF Power Controllers with 250kHz Control Loop Bandwidth and 40dB Dynamic Range

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中文翻译

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LTC1758-2EMS 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：MSOP包装说明：TSSOP, TSSOP10,.19,20
针数：10Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：7.63Is Samacsys：N
JESD-30 代码：S-PDSO-G10JESD-609代码：e0
长度：3 mm湿度敏感等级：1
功能数量：1端子数量：10
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP10,.19,20封装形状：SQUARE
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：235
电源：3/5 V认证状态：Not Qualified
座面最大高度：1.1 mm子类别：Other Telecom ICs
最大压摆率：0.0017 mA标称供电电压：3.6 V
表面贴装：YES技术：CMOS
电信集成电路类型：TELECOM CIRCUIT温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：20宽度：3 mm
Base Number Matches：1

LTC1758-2EMS 数据手册

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LTC1758-1/LTC1758-2  
RF Power Controllers with  
250kHz Control Loop Bandwidth and  
40dB Dynamic Range  
U
DESCRIPTIO  
FEATURES  
The LTC®1758-2 is a dual band RF power controller for  
RF power amplifiers operating in the 850MHz to 2GHz  
range. The loop bandwidth reduction to 250kHz im-  
proves frequency stability when controlling slow turn-on  
PAs such as the Philips BGY280, Conexant RM009/  
CX77302,AnadigicsAWT6102/AWT6107andtheHitachi  
PF08107/PF08123B.  
■
Dual Band RF Power Amplifier Control (LTC1758-2)  
Internal Schottky Diode Detector with Improved  
Dynamic Range vs LTC1757A  
Wide Input Frequency Range: 850MHz to 2GHz  
Autozero Loop Cancels Offset Errors and  
Temperature Dependent Offsets  
Wide VIN Range: 2.7V to 6V  
■
■
■
■
Allows Direct Connection to Battery  
RF Output Power Set by External DAC  
250kHz Control Loop Bandwidth  
Fast Acquire After Transmit Enable  
Internal Frequency Compensation  
Rail-to-Rail Power Control Outputs  
Power Control Signal Overvoltage Protection  
Low Operating Current: 1mA  
The LTC1758-1 is a single output RF power controller  
that is identical in performance to the LTC1758-2 except  
that one output (VPCA) is provided. The LTC1758-1 can  
be used to drive a single RF or dual channel module with  
integral multiplexer. This part is available in an 8-pin  
MSOP package.  
■
■
■
■
■
■
■
■
■
RF power is controlled by driving the RF amplifier power  
control pins and sensing the resultant RF output power  
via a directional coupler. The RF sense voltage is peak  
detected using an on-chip Schottky diode. This detected  
voltage is compared to the DAC voltage at the PCTL pin  
to control the output power. The RF power amplifier is  
protected against high supply current and high power  
control pin voltages.  
Very Low Shutdown Current: <1µA  
Available in 8-Pin MSOP (LTC1758-1)  
and 10-Pin MSOP (LTC1758-2) Packages  
Pin Compatible with LTC1757A-X  
Improved Start Voltage Accuracy  
Improved PCTL Input Filtering  
■
■
■
U
APPLICATIO S  
Internal and external offsets are cancelled over tempera-  
ture by an autozero control loop, allowing accurate low  
power programming. The shutdown feature disables the  
part and reduces the supply current to <1µA.  
■
Single and Dual Band GSM/GPRS Cellular Telephones  
■
PCS Devices  
■
Wireless Data Modems  
■
U.S. TDMA Cellular Phones  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
LTC1758-2 Dual Band Cellular Telephone Transmitter  
68Ω  
LTC1758-2  
33pF  
V
IN  
1
2
3
4
5
10  
9
V
V
IN  
CC  
PCA  
PCB  
DIRECTIONAL  
COUPLER  
Li-Ion  
RF  
V
V
DIPLEXER  
8
SHDN  
BSEL  
SHDN  
BSEL  
GND  
900MHz  
RF PA  
7
TXEN  
PCTL  
TXEN  
6
50Ω  
DAC  
1.8GHz/1.9GHz  
RF PA  
1758 TA01  
1
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中文翻译

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