LTC4403-1 Multiband RF Power Controllers for EDGE/TDMA

The LTC®4403-2 is a multiband RF power controller for RF power amplifiers operating in the 300MHz to 2.4GHz range. The LTC4403-2 has two outputs to control dual TX PA modules with two control inputs. An internal sample and hold circuit enables the LTC4403-2 to be used with AM modulation via the carrier or PA supply. The input voltage range is optimized for operation from a single lithium-ion cell or 3x NiMH.

RF power is controlled by driving the RF amplifier power control pins and sensing the resultant RF output power. 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 LTC4403-1 is a single output RF power controller with identical performance to the LTC4403-2. The LTC4403-1 has one output to control a single TX PA or dual TX PA module with a single control input and is available in an 8-pin MSOP package.

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

产品特点 Features

Supports AM Modulation in EDGE/TDMA (ANSI-136) Applications
Single Output RF Power Amplifier Control (LTC4403-1)
Dual Output RF Power Amplifier Control (LTC4403-2)
Internal Schottky Diode Detector with >40dB Range
Wide Input Frequency Range: 300MHz to 2.4GHz
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
Internal Frequency Compensation
Rail-to-Rail Power Control Outputs
Low Operating Current: 1mA
Low Shutdown Current: <10µA
PCTL Input Filter
Available in a 8-Pin MSOP Package (LTC4403-1) and 10-Pin MSOP (LTC4403-2)

应用

Multiband GSM/GPRS/EDGE Cellular Telephones
PCS Devices
Wireless Data Modems
U.S. TDMA Cellular Phones

典型应用图

参数

LTC4403-1 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC4403-1EMS8	MSOP	8	E	$2.23	$1.60
LTC4403-1EMS8#PBF	MSOP	8	E	$2.23	$1.60
LTC4403-1EMS8#TR	MSOP	8	E		$1.66
LTC4403-1EMS8#TRPBF	MSOP	8	E		$1.66
LTC4403-2EMS	MSOP	10	E	$2.68	$1.90
LTC4403-2EMS#PBF	MSOP	10	E	$2.68	$1.90
LTC4403-2EMS#TR	MSOP	10	E		$1.96
LTC4403-2EMS#TRPBF	MSOP	10	E		$1.96

LTC4403-1 数据手册及相关资料下载

数据手册 (英文) : LTC4403-1/LTC4403-2 - Multiband RF Power Controllers for EDGE/TDMA.PDF
应用指南 (英文) : AN91 - Low Cost Coupling Methods for RF Power Detectors Replace Directional Couplers.PDF
可靠性数据 : R421 Reliability Data .PDF