AD8315 Datasheet | Analog Devices

Data Sheet 50 d B GSM PA Controller AD8315 Features plete RF detector/controller function >50 d B range at 0.9 GHz (- 49 d Bm to +2 d Bm, re 50 Ω) Accurate scaling from 0.1 GHz to 2.5 GHz Temperature-stable linear-in-d B response Log slope of 23 m V/d B, intercept at - 60 d Bm at 0.9 GHz True integration function in control loop Low power: 20 m W at 2.7 V, 38 m W at 5 V Power-down to 10.8 μW APPLICATIONS Single, dual, and triple band mobile handset (GSM, DCS, EDGE) Transmitter power control GENERAL DESCRIPTION The AD8315 is a plete 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 d B. It is intended for use in cellular handsets and other batteryoperated wireless devices. The log amp technique provides a much wider measurement range and better accuracy than controllers using diode detectors. In particular, the temperature stability is excellent over a specified range of -...