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AD8306:  5 MHz TO 400 MHz, 100 dB High Precision Limiting - Logarithmic Amplifier

Product Details

The AD8306 is a complete IF limiting amplifier, providing both an accurate logarithmic (decibel) measure of the input signal (the RSSI function) over a dynamic range of 100 dB, and a programmable limiter output, useful from 5 MHz to 400 MHz.

An evaluation board is available for this product and may be ordered using the following product number: AD8306-EVAL. Schematic and layout for this evaluation board is contained in the product datasheet.


  • Complete, Fully Calibrated Log-Limiting IF Amplifier
  • 100 dB Dynamic Range: –91 dBV to +9 dBV
  • Stable RSSI Scaling Over Temperature and Supplies:
    20 mV/dB Slope, –95 dBm Intercept
    ±0.4 dB RSSI Linearity up to 200 MHz
  • Fully Differential Inputs, RIN = 1 kΩ,
    CIN = 2.5 pF
  • Single Supply of +2.7 V to +6.5 V at
    16 mA Typical
  • Programmable Limiter Gain and
    Output Current
    Differential Outputs to 10 mA,
    2.4 V p-p
    Overall Gain 90 dB, Bandwidth 400 MHz
    Constant Phase (Typical ±56 ps
    Delay Skew)
  • 500 ns Power-Up Time, <1 mA
    Sleep Current

Functional Block Diagram for AD8306


Title Content Type File Type
AD8306: 5 MHz-400 MHz 100 dB High Precision Limiting-Logarithmic Amplifier Data Sheet  (Rev A, 08/1999) (pdf, 397 kB) Data Sheets PDF
AD8306: Military Data Sheet  (Rev A, 02/1999) (pdf) Data Sheets PDF
AN-1040: RF Power Calibration Improves Performance of Wireless Transmitters  (pdf, 152 kB) Application Notes PDF
AN-691: Operation of RF Detector Products at Low Frequency  (pdf, 778 kB) Application Notes PDF
ADI Warns Against Misuse of COTS Integrated Circuits  (pdf, 13 kB)
(Revised 1/03)
Invites Customer Participation in Creative Mil/Aero System Solutions
Recommended Reading PDF
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
Ask The Applications Engineer - 28
Logarithmic Amplifiers-Explained

(Analog Dialogue, Vol. 33, No. 3, March, 1999)
Analog Dialogue HTML
Detecting Fast RF Bursts Using Log Amps
(Analog Dialogue, Vol. 36, No. 5, September-October, 2002)
Analog Dialogue HTML
Accurate Gain/Phase Measurement at Radio Frequencies up to 2.5 GHz
(Analog Dialogue, Vol. 35, No. 5, October, 2001)
Analog Dialogue HTML
Space Qualified Parts List  (pdf, 93 kB)
This document lists 67 (240+) space level products that are available from Analog Devices. Many of the products listed are state-of-the-art data conversion and signal processing products that were previously only available as commercial or military Class B products. Through our Space Products Group and MIL-PRF-38535 certified Level V (Class S) facility, we are pleased to offer these products to the space marketplace.
Aerospace Information PDF
RF Source Booklet  (PDF, 4353 kB)
RF IC Product Overview - Version P (02/2014)
Overview PDF
Industrial Applications 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
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 3.60.10
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

AD8306 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
5962-9864601QEA Status: Production 16 ld Side-Brazed CerDIP 16 Mil Tube, 23 $130.44 $117.39 N  Material Info PCN Purchase
AD8306ACHIPS Status: Production CHIPS OR DIE 0 Ind Tray, 100 $18.72 $14.67 Y  Material Info Notify Me Purchase
AD8306AR Status: Production 16 ld SOIC 16 Ind Tube, 48 $21.62 $16.95 N  Material Info PCN Purchase
AD8306AR-REEL7 Status: Production 16 ld SOIC 16 Ind Reel, 1000 - $16.95 N  Material Info PCN Purchase
AD8306ARZ Status: Production 16 ld SOIC 16 Ind Tube, 48 $18.72 $14.67 Y  Material Info PCN Purchase Sample
AD8306ARZ-RL7 Status: Production 16 ld SOIC 16 Ind Reel, 1000 - $14.67 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.

AD8306 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
AD8306-EVALZ Status: Production Evaluation Board $200.00 Yes -

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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