Add to Signal Chain Designer

ADL5502:  450 MHz TO 6000 MHz Crest Factor Detector

Product Details

Product Status:Recommended for New Designs

The ADL5502 is a mean-responding (true rms) power detector in combination with an envelope detector to accurately determine the crest factor of a modulated signal. It can be used in high frequency receiver and transmitter signal chains from 450 MHz to 6 GHz with envelope bandwidths over 10 MHz. Requiring only a single supply between 2.5 V and 3.3 V, the detector draws less than 3 mA. The input is internally ac-coupled and has a nominal input impedance of 500 Ω.

The rms output is a linear-responding dc voltage with a conversion gain of 1.8 V/V rms at 900 MHz. The peak envelope output with a conversion gain of 1.2 V/V is toggled for peak hold with less than 1% output voltage droop in over 1 ms.

The ADL5502 is a highly accurate, easy to use means of determining the rms and peak to the average value of complex waveforms. It can be used for crest factor measurements of both simple and complex waveforms but is particularly useful for measuring high crest factor (high peak-to-rms ratio) signals, such as W-CDMA, CDMA2000, and QPSK-/QAM-based OFDM waveforms. The peak hold function allows the capture of short peaks in the envelope with lower sampling rate ADC’s.

The crest factor detector operates from −40°C to +85°C and is available in an 8-ball, 1.5 mm × 1.5 mm wafer-level chip scale package. It is fabricated on a high fT silicon BiCMOS process.


  • Power and envelope measurement of W-CDMA, CDMA2000, and QPSK-/QAM-based OFDM, and
    other complex modulation waveforms
  • RF transmitter or receiver power and envelope measurement

    • True rms response detector
    • Envelope peak hold output
    • Excellent temperature stability
    • ±0.25 dB rms detection accuracy vs. temperature
    • ±0.25 dB envelope detection accuracy vs. temperature; over the top 25 dB of the input range
    • Over 35 dB input power dynamic range, inclusive of crest factor
    • RF bandwidths from 450 MHz to 6 GHz
    • Envelope bandwidths of 10 MHz
    • 500 Ω input impedance
    • Single-supply operation: 2.5 V to 3.3 V
    • Low power: 3 mA at 3 V supply
    • RoHS compliant part

    Functional Block Diagram for ADL5502


    Title Content Type File Type
    ADL5502: 450 MHz to 6000 MHz Crest Factor Detector Data Sheet (Rev A, 01/2011) (pdf, 453 kB) Data Sheets PDF
    CN-0187: Crest Factor, Peak, and RMS RF Power Measurement Circuit Optimized for High Speed, Low Power, and Single 3.3 V Supply  (pdf, 163 kB) Circuit Note PDF
    RF Source Booklet  (PDF, 4353 kB)
    RF IC Product Overview - Version P (02/2014)
    Overview PDF
    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.

    Product Recommendations & Reference Designs

    Engineered. Tested. Ready to Integrate.
    Learn More

    SampleSample & Buy

    Price, packaging, availability

    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.

    ADL5502 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    ADL5502-EVALZ Status: Production Evaluation Board $99.00 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

    View Sales and Distribution Offices

    content here.
    content here.

    Review this Product