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AD8315:  50 DB GSM PA CONTROLLER

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 ...More

AD8315:  50 DB GSM PA CONTROLLER

Product 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.

Its high sensitivity allows control at low signal levels, thus reducing the amount of power that needs to be coupled to the detector.

The AD8315 is available in MSOP and LFCSP packages and consumes 8.5 mA from a 2.7 V to 5.5 V supply. When powered down, the sleep current is 4 µA.

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  • 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
  • RF Frequency (MHz): 100 to 2500
  • Dynamic Range (dB): 50dB
  • Temp Stability (dB): ±1dB
  • Response Time (ns typ): 150ns
  • Voltage Supply (V): 2.7 to 5.5
  • Supply Current : 8.5mA
  • Package: 8-Lead uSOIC

Functional Block Diagram for AD8315

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Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

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This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.