GENERAL DESCRIPTION

The AD8315 is a complete low cost subsystem for the precise control of RF power amplifiers operating in the frequency range 0.1 GHz to 2.5 GHz and over a typical dynamic range of 50 dB.

It is intended for use in cellular handsets and other battery operated wireless devices. The log amp technique provides a much wider measurement range and better accuracy than controllers using diode detectors. In particular, its temperature stability is excellent over a specified range of −30°C to +85°C.

FEATURES

Complete RF detector/controller function

>50 dB range at 0.9 GHz (−49 dBm to +2 dBm, re 50 Ω)

Accurate scaling from 0.1 GHz to 2.5 GHz

Temperature-stable linear-in-dB response

Log slope of 23 mV/dB, intercept at −60 dBm at 0.9 GHz

True integration function in control loop

Low power: 20 mW at 2.7 V, 38 mW at 5 V

Power-down to 10.8 μW

APPLICATIONS

Single, dual, and triple band mobile handset (GSM, DCS, EDGE)

Transmitter power control

AD8315ARM属于RF/IF，射频/中频和 RFID > RF 功率控制器 IC。亚德诺半导体技术有限公司制造生产的AD8315ARMRF 功率控制器 ICRF 功率控制 IC 器件可用于测量正在发射的信号的射频功率，并向可编程放大器或类似设备提供相应反馈信号，以保持所需的发射信号功率水平。