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LTC1758-2 - 典型应用图例：

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LTC1758-2 - LTC1758-2是RF Power Controllers with 250kHz Control Loop Bandwidth and 40dB Dynamic Range

LTC1758-2是LINEAR凌力尔特公司的一款功率放大器控制器产品，LTC1758-2是LTC1758-2是RF Power Controllers with 250kHz Control Loop Bandwidth and 40dB Dynamic Range，本站介绍了LTC1758-2的封装应用图解、特点和优点、功能等，并给出了与LTC1758-2相关的LINEAR元器件型号供参考。

LTC1758-2 - LTC1758-2是RF Power Controllers with 250kHz Control Loop Bandwidth and 40dB Dynamic Range - 功率放大器控制器 - RF和无线 - 凌力尔特

LTC1758-2 - RF Power Controllers with 250kHz Control Loop Bandwidth and 40dB Dynamic Range

LTC1758-1 - RF Power Controllers with 250kHz Control Loop Bandwidth and 40dB Dynamic Range - Linear Technology（凌力尔特）

功能描述

The LTC1758-2 is a dual band RF power controller for RF power amplifiers operating in the 850MHz to 2GHz range. The loop bandwidth reduction to 250kHz improves frequency stability when controlling slow turn-on PAs such as the Philips BGY280, Conexant RM009/CX77302, Anadigics AWT6102/AWT6107 and the Hitachi PF08107/PF08123B.

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.

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 <1µA.

特点

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 6VAllows 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

Very Low Shutdown Current: <1µA

Available in 8-PIn MSOP (LTC1758-1)and 10-Pin MSOP (LTC 1758-2) Packages

Improved Start Voltage Accuracy

Improved PCTL Input Filtering

Pin Compatible with LTC1757A-X

应用

Single and Dual Band 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)
LTC1758-1EMS8	MS-8	E	$1.95	$1.65
LTC1758-1EMS8#PBF	MS-8	E	$1.95	$1.65
LTC1758-1EMS8#TR	MS-8	E		$1.70
LTC1758-1EMS8#TRPBF	MS-8	E		$1.70
LTC1758-2EMS	MS-10	E	$2.03	$1.70
LTC1758-2EMS#PBF	MS-10	E	$2.03	$1.70
LTC1758-2EMS#TR	MS-10	E		$1.75
LTC1758-2EMS#TRPBF	MS-10	E		$1.75

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