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AD8315:  50 dB GSM PA Controller

Product Details


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.

FEATURES and BENEFITS

  • 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

Functional Block Diagram for AD8315

Documentation

Title Content Type File Type
AD8315: 50 dB GSM PA Controller Data Sheet (Rev C, 06/2006) (pdf, 546 kB) Data Sheets PDF
AN-653: Improving Temperature, Stability, and Linearity of High Dynamic Range RMS RF Power Detectors  (pdf, 415 kB) Application Notes PDF
Design and Operation of Automatic Gain Control Loops for Receivers in Modern Communication Systems  (pdf, 129 kB) Tutorials PDF
Ask The Applications Engineer - 28
Logarithmic Amplifiers-Explained

(Analog Dialogue, Vol. 33, No. 3, March, 1999)
Analog Dialogue HTML
Measurement and Control of RF Power
by Eamon Nash, Analog Devices, Inc.
Technical Articles HTML
Detecting Fast RF Bursts using Log Amps  (pdf, 174 kB)
by Yuping Toh, Analog Devices, Inc.
Technical Articles PDF
Make Precise Base-Station Power Measurements  (pdf, 1764 kB)
(Microwaves and RF, November 2002)
Technical Articles PDF
Log Amps and Directional Couplers Enable VSWR Detection  (pdf, 2223 kB)
by Anil Rachakonda and Larry Hawkins, Analog Devices, Inc. (RF Design, 1/1/2007)
Technical Articles PDF
Measuring VSWR and Gain in Wireless Systems  (pdf)
By Eamon Nash, Analog Devices Inc., (Microwave Journal, Nov 2005)
Technical Articles PDF
Measuring the RF Power in CDMA2000 and W-CDMA High Power Amplifiers (HPAs)  (pdf, 609 kB)
By Larry Hawkins, Analog Devices, Inc. (MPD Digest, Nov. 2005)
Technical Articles PDF
Design a Logamp RF Pulse Detector  (pdf, 338 kB)
by Eamon Nash
(Microwaves & RF, January 1, 2000)
Technical Articles PDF
RF Source Booklet  (PDF, 4353 kB)
RF IC Product Overview - Version P (02/2014)
Overview PDF
Industrial Applications Overview HTML
We measure portable performance in µA and MHz. In handheld designs, analog is everywhere. Overview HTML
ICs for Enhanced Handset User Experience Overview HTML
What is an RF Detector, and how is it used? FAQs/RAQs HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADIsimRF
ADI’s ADIsimRF design tool provides calculations for the most important parameters within the RF signal chain, including cascaded gain, noise figure, IP3, P1dB, and total power consumption.
ADIsim Design/Simulation Tools HTML
ADIsimPLL™- Version 3.43
ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.
ADIsim Design/Simulation Tools HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

AD8315 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8315ACPZ-REEL7 Status: Production 8 ld LFCSP (3x2mm) 8 Ind Reel, 3000 - Y  Material Info Notify Me Purchase Sample
AD8315ARM-REEL7 Status: Last Time Buy 8 ld MSOP 8 Ind Reel, 1000 - N  Material Info PCN/PDN Purchase
AD8315ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 - Y  Material Info PCN Purchase
AD8315ARMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - Y  Material Info PCN Purchase
Price Table Help

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.

AD8315 Evaluation Boards
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8315-EVAL Status: Production Evaluation Board $101.20 No -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

Check Inventory & Purchase

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