AD8315 PDF Datasheet


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Description

This is 50 dB GSM PA Controller. Data Sheet 50 dB GSM PA Controller AD8315 FEATURES Complete RF detector, controller function >50 dB range at 0.9 GH- ( 49 dBm to +2 dBm, re 50 Ω) Accurate scaling from 0.1 GH- to 2.5 GH- Temperature-stable linear-in-dB response Log slope of 23 mV, dB, intercept at 60 dBm at 0.9 GH- 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 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 GH- to 2.5 GH- and over a typical dynamic range of 50 dB. 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 30°C .