Datasheet > LTC4400-2

LTC4400-2

更新时间： 2024-01-24 11:06:26

品牌	Logo	应用领域
凌特 - Linear		控制器
页数	文件大小	规格书
16页	187K
描述
RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range

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中文翻译

获取价格

数据手册

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LTC4400-2 数据手册

LTC4400-1/LTC4400-2

RF Power Controllers with

450kHz Loop BW and

45dB Dynamic Range

FEATURES

DESCRIPTIO

RF Power Amplifier Control in ThinSOT^TMPackage

The LTC^®4400-1 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.

■

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 V_CCRange: 2.7V to 6V

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.

■

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

■

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 <10µA.

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

A dual control channel version (LTC4400-2) is also

available in an 8-pin MSOP package.

, LTC and LT are registered trademarks of Linear Technology Corporation.

ThinSOT is a trademark of Linear Technology Corporation.

APPLICATIO S

■

GSM/GPRS Cellular Telephones

■

PCS Devices

■

Wireless Data Modems

U.S. TDMA Cellular Phones

■

LTC4400-1 Detector Characteristics at

TYPICAL APPLICATIO

900MHz and 1800MHz

10000

= 25°C

= 3.6V

LTC4400-1 Dual Band Cellular Telephone Transmitter

1000

100

50Ω

900MHz

1800MHz

Li-Ion

BAND

0.1µF

0.4pF

LTC4400-1

SELECT

900MHz

OUTPUT

SHDN

PCA

900MHz

INPUT

PA MODULE

PCTL

GND

DAC

–26 –22–18 –14 –10 –6 –2

10 14 18

1.8GHz

OUTPUT

1.8GHz

INPUT

RF INPUT POWER (dBm)

4400 TA01

4400 TA04

sn4400 4400fas

12 3 4 5 6 7...16

中文翻译

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与LTC4400-2相关器件

型号	品牌	获取价格	描述	数据表
LTC4400-2_15	Linear	获取价格	RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range
LTC4400-2EMS8	Linear	获取价格	RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range
LTC4400-2EMS8#PBF	Linear	获取价格	LTC4400 - RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range; Package: MSOP;
LTC4400-2EMS8#TR	Linear	获取价格	LTC4400 - RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range; Package: MSOP;
LTC4400-2EMS8#TRPBF	Linear	获取价格	LTC4400 - RF Power Controllers with 450kHz Loop BW and 45dB Dynamic Range; Package: MSOP;
LTC4401	Linear	获取价格	40MHz to 900MHz Quadrature Demodulator
LTC4401-1	Linear	获取价格	RF Power Controllers with 250kHz Loop BW and 45dB Dynamic Range
LTC4401-1_15	Linear	获取价格	RF Power Controllers with 250kHz Loop BW and 45dB Dynamic Range
LTC4401-1ES6	Linear	获取价格	RF Power Controllers with 250kHz Loop BW and 45dB Dynamic Range
LTC4401-1ES6#PBF	Linear	获取价格	暂无描述

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