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ADF7021-V:  High Performance, Narrow-Band Transceiver IC

Product Details

Product Status:Recommended for New Designs

The ADF7021-V is a high performance, low power, narrow-band RF transceiver based on the ADF7021-N. The architecture of the ADF7021-V transceiver is similar to that of the ADF7021-N except that an external VCO is used by the on-chip RF synthesizer for applications that require improved phase noise performance.

The ADF7021-V is designed to operate in both the license-free ISM bands and in the licensed bands from 80 MHz to 960 MHz.

To minimize RF feedthrough and spurious emissions, the external VCO operates at 2× or 4× the desired RF frequency; the ADF7021-V supports a maximum VCO frequency operation of 1920 MHz. The 4× VCO operation is programmable by enabling an additional on-chip divide-by-2 outside the RF synthesizer loop and offers improved phase noise performance.

As with the ADF7021-N receiver, the IF filter bandwidths of 9 kHz, 13.5 kHz, and 18.5 kHz are supported, making the ADF7021-V ideally suited to worldwide narrow-band telemetry applications.

The part has both Gaussian and raised cosine transmit data filtering options to improve spectral efficiency for narrow-band applications. It is suitable for circuit applications targeted at the following:

  • European ETSI EN 300 220
  • North American FCC Part 15, Part 90, and Part 95
  • Japanese ARIB STD-T67
  • Korean short-range device regulations
  • Chinese short-range device regulations
  • A complete transceiver can be built using a small number of discrete external components, making the ADF7021-V very suitable for area-sensitive, high performance driven applications.

    See data sheet for more information.


    • Narrow-band, short range device (SRD) standards
            ETSI EN 300 220
            FCC Part 90 (meets
            Emission Mask D requirements)
            FCC Part 95
            ARIB STD-T67
    • Wireless Metering
    • Narrow-band wireless telemetry


    • High performance, low power, narrow-band transceiver
    • Enhanced performance ADF7021-N with external VCO
    • Frequency bands using external VCO: 80 MHz to 960 MHz
    • Improved adjacent channel power (ACP) and adjacent channel rejection (ACR) compared with the ADF7021-N
    • Programmable IF filter bandwidths: 9 kHz, 13.5 kHz, and 18.5 kHz
    • Modulation schemes: 2FSK, 3FSK, 4FSK, MSK
    • Spectral shaping: Gaussian and raised cosine filtering
    • Data rates: 0.05 kbps to 24 kbps
    • Power supply: 2.3 V to 3.6 V
    • See data sheet for additional Features

    Functional Block Diagram for ADF7021-V

    3rd party developers information

    ADF70xx Third Party Developers
    There is a growing list of companies developing a wide range of solutions that support ADI’s ADF70xx products. View the list and learn more about becoming a third party developer.


    Title Content Type File Type
    ADF7021-V: High Performance,Narrow-Band Transceiver IC Data Sheet (Rev B, 09/2014) (pdf, 1572 kB) Data Sheets PDF
    AN-1285: ADF7021-N Radio Performance for Wireless Meter-Bus (WM-Bus), Mode N  (pdf, 188 kB) Application Notes PDF
    AN-1258: Image Rejection Calibration on the ADF7021, ADF7021-N, and ADF7021-V  (pdf, 398 kB) Application Notes PDF
    AN-1182: Understanding and Optimizing the AFC Loop on the ADF7021 for Minimum Preamble  (pdf, 224 kB) Application Notes PDF
    AN-771: ADSP-BF533 EZ-KIT Lite and ADF70xx Interface  (pdf, 201 kB) Application Notes PDF
    AN-859: RF Port Impedance Data, Matching, and External Component Selection for the ADF7020-1, ADF7021, and ADF7021-N  (pdf, 333 kB) Application Notes PDF
    AN-0987: Designing a Wireless Transceiver System to Meet the Wireless M-Bus Standard  (pdf, 140 kB) Application Notes PDF
    AN-915: CDR Operation for ADF7020, ADF7020-1, ADF7021, and ADF7025  (pdf, 439 kB) Application Notes PDF
    AN-772: A Design and Manufacturing Guide for the Lead Frame Chip Scale Package (LFCSP)  (pdf, 439 kB) Application Notes PDF
    AN-852: Using the Test DAC on the ADF702x to Implement Functions Such as Analog FM DEMOD, SNR Measurement, FEC Decoding, and PSK/4FSK Demodulation  (pdf, 259 kB) Application Notes PDF
    Wireless Technologies for Smart Meters: Focus on Water Metering  (pdf, 493 kB) Technical Articles PDF
    RF Meets Power Lines: Designing Intelligent Smart Grid Systems that Promote Energy Efficiency
    RF DesignLine, March 2010
    Technical Articles HTML
    The Use of Short Range Wireless in a Multi-Metering System  (pdf, 220 kB)
    One of the more evident trends at the recent Metering Europe 2006 event in Copenhagen was that both meter manufacturers and utility companies are placing an increased emphasis on the use of communication networks to create added value for their systems and also to leverage from infrastructure investment already in place.
    (Metering International, December, 2006)
    Technical Articles PDF
    Understand Wireless Short-Range Devices for Global License-Free Systems
    Short-range devices (SRD) are radio transmitters that communicate unidirectionally or bidirectionally with little capability of interfering with other radio equipment. They provide many different services, including home automation, wireless alarms, and remote keyless entry.
    (RF DesignLine, March 07, 2007)
    Technical Articles HTML
    Wireless Short Range Devices and Narrowband Communications
    The term “Short Range Device” (SRD) covers radio transmitters which provide either unidirectional or bi-directional communication and which have a low capability of causing interference to other radio equipment.
    (Microwave Product Digest, July, 2007)
    Technical Articles HTML
    Design, Simulate, and Document Proprietary Wireless Systems
    The broad acceptance of standards developed for short range wireless connectivity has been one of the notable features of the semiconductor market in the past few years. The available wireless standards are not always the best fit for the application’s requirements, however.
    (Analog Dialogue, Volume 42, Number 4 2008)
    Technical Articles HTML
    Smart Metering Technology Promotes Energy Efficiency for a Greener World
    The metering of electric power coming into the home is going electronic, replacing the long-established electromechanical power-line meter (from the 1890s) with all-electronic smart meters.
    (RF DesignLine, July 27, 2009)
    Technical Articles HTML
    Low Power, Low Cost, Wireless ECG Holter Monitor Technical Articles HTML
    Emerging Energy Applications Solutions Bulletin, Volume 10, Issue 4  (pdf, 1496 kB) Solutions Bulletins PDF
    RF Source Booklet  (PDF, 4353 kB)
    RF IC Product Overview - Version P (02/2014)
    Overview PDF
    RF Transceivers for Short Range Devices  (pdf, 2819 kB)
    The ADF7000 series of transmitter and transceiver ICs provides high performance, robust, short range wireless connections.
    Overview PDF
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    ADIsimSRD Design Studio
    Analog Devices ADIsimSRD Design Studio is a very powerful tool allowing real-time simulation and optimization of many of the parameters in a typical wireless system using the ADF7xxx family of transceivers and transmitters.
    ADIsim Design/Simulation Tools HTML
    RF Design Tools ADIsim Design/Simulation Tools HTML
    ADF70xx Evaluation Software  (zip, 25403 kB)
    The most up-to-date ADF70xx software download is bundled with all documentation, including schematics, for the ADF70xx family of transceivers. Layout can be found in the gerber files under the documentation tab.
    Evaluation Software ZIP

    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

    ADF7021-V Model Options
    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.

    ADF7021-V Evaluation Boards
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    EVAL-ADF70XXMBZ2 Status: Production Mother Board $151.80 Yes -
    EVAL-ADF7021-VDB1Z Status: Contact ADI Daughter Board (450 MHz - 470 MHz) $50.60 Yes -
    EVAL-ADF7021-VDB2Z Status: Contact ADI Daughter Board (868 MHz - 870 MHz) $50.60 Yes -
    EVAL-ADF7021-VDB3Z Status: Contact ADI Daughter Board (156 MHz - 162 MHz) $50.60 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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