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LTC4400-2技术文档下载：

LTC4400-2 - 典型应用图例：

LTC4400-2 - 封装图解：

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LTC4400-2 - LTC4400-2是RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range

LTC4400-2是LINEAR凌力尔特公司的一款功率放大器控制器产品，LTC4400-2是LTC4400-2是RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range，本站介绍了LTC4400-2的封装应用图解、特点和优点、功能等，并给出了与LTC4400-2相关的LINEAR元器件型号供参考。

LTC4400-2 - LTC4400-2是RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range - 功率放大器控制器 - RF和无线 - 凌力尔特

LTC4400-2 - RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range

LTC4400-1 - RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range - Linear Technology（凌力尔特）

功能描述

The LTC4400-1 is a SOT-23 RF power controller for fast turn-on RF power amplifiers operating in the 300MHz to 2.7GHz range. Examples include the Hitachi PF08109B, PF08122B, PF08123B, PF08107B and RF Micro Devices RF3108. For slow turn-on RF power amplifiers refer to the LTC4401-1/LTC4401-2.

RF power is controlled by driving the RF amplifier power control pin and sensing the resultant RF output power via a directional coupler or capacitive tap. The RF input 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 power control pin voltages.

Internal and external offsets are cancelled over temperature by an autozero control loop, allowing accurate low power programming. The shutdown feature disables the part and reduces the supply current to <10µA.

A dual control channel version (LTC4400-2) is also available in an 8-pin MSOP package.

特点

RF Power Amplifier Control in ThinSOT™ Package

Internal Schottky Diode Detector with > 45dB Range

Wide Input Frequency Range:300MHz to 2.7GHz (LTC4400-1)300MHz to 2GHz (LTC4400-2)

Autozero Loop Cancels Offset Errors and Temperature Dependent Offsets

Wide VCC Range: 2.7V to 6V

Automatic Bandwidth Control Improves Low Power Ramp Response

Allows Direct Connection to Battery

RF Output Power Set by External DAC

Internal Frequency Compensation

Rail-to-Rail Power Control Output

Power Control Signal Overvoltage Protection

Low Operating Current: 1mA

Low Shutdown Current: 10µA

Two Pole PCTL Input Filtering

Low Profile (1mm) ThinSOT (LTC4400-1) and 8-Pin MSOP (LTC4400-2) Packages

应用

GSM/GPRS Cellular Telephones

PCS Devices

Wireless Data Modems

U.S. TDMA Cellular Phones

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LTC4400-1ES6	SOT-23	E	$1.56
LTC4400-1ES6#PBF	SOT-23	E	$1.56
LTC4400-1ES6#TR	SOT-23	E		$1.25
LTC4400-1ES6#TRM	SOT-23	E	$1.61	$1.27
LTC4400-1ES6#TRMPBF	SOT-23	E	$1.61	$1.27
LTC4400-1ES6#TRPBF	SOT-23	E		$1.25
LTC4400-2EMS8	MS-8	E	$1.86	$1.60
LTC4400-2EMS8#PBF	MS-8	E	$1.86	$1.60
LTC4400-2EMS8#TR	MS-8	E		$1.66
LTC4400-2EMS8#TRPBF	MS-8	E		$1.66

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