0.1 GHz TO 2.5 GHz, 70 dB Logarithmic Detector / Controller
The AD8313 is an RF logarithmic detector and controller, with response extending from 0.1 to 2.5 GHz. The device is capable of accurately converting a modulated RF signal at its differential input to an equivalent decibel-scaled value at its dc output. The dynamic range is up to 70 dB with ±3 dB accuracy, or 62 dB to ±1 dB. The AD8313 is useful for RF transmitter and receiver power measurement and control applications. It is offered in a small eight-pin micro-SO package. Its application requires only the provision of a 2.7 V to 5.5 V power supply, along with input coupling and power supply decoupling capacitors.
An evaluation board is available for this product and may be ordered using the following product number: AD8313-EVAL. Schematic and layout for this evaluation board is contained in the product datasheet.
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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
AD8313-EVALZ is a fully populated, 4-layer Rogers 4350 and FR4 based evaluation board. The top and bottom signal layers are Rogers 4350 and the internal layers are FR4. For normal operation, it requires a single power supply of 2.7 - 5.5 V, capable of delivering 50 mA. The power supply should be connected to the test loops labeled VPS1, VPS2 and GND. The test loop labeled VNEG, should be connected to ground. The RF input signal is applied to the SMA connector (INHA). VOUT is available from the SMA connector (VOUT). The SMA connectors ENBL and VSET allow the option of applying an external signal at these nodes.
Detecting Fast RF Bursts Using Log Amps
(Analog Dialogue, Vol. 36, No. 5, September-October, 2002)
Ask The Applications Engineer - 28 Logarithmic Amplifiers-Explained
(Analog Dialogue, Vol. 33, No. 3, March, 1999)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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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.