50 dB GSM PA ControllerAD8311FEATURES Its high sensitivity allows control at low signal levels, thus reducing the amount of power that needs to be coupled to the Complete RF detector/controller function detector. For convenience, the signal is internally ac-coupled. >50 dB range at 0.9 GHz (−48 dBm to +3 dBm re 50 Ω) This high-pass coupling, with a corner at approximately Accurate scaling from 0.1 GHz to 2.5 GHz 0.016 GHz, determines the lowest operating frequency. Thus, Temperature-stable linear-in-dB response the source can be dc-grounded. Log slope of 23 mV/dB, intercept at −60 dBm at 0.9 GHz True integration function in control loop The AD8311 provides a voltage output, VAPC, which has the Low power: 20 mW at 2.7 V voltage range and current drive to directly connect to the gain
control pin of most handset power amplifiers. VAPC can swing APPLICATIONS from 300 mV above ground to within 200 mV below the supply voltage. Load currents of up to 6 mA can be supported. Single, dual, and triple band mobile handset (GSM, DCS,EDGE) The setpoint control input is applied to pin VSET and has an Transmitter power control operating range of 0.25 V to 1.4 V. The associated circuit