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ADF7901:  High Performance ISM Band ASK/FSK Transmitter IC

Product Details

The ADF7901 is a low power OOK/FSK UHF transmitter designed for use in RF remote control devices. The device is capable of Frequency Shift Keying (FSK) modulation on eight different channels, selectable by three external control lines. OOK modulation is performed by modulating the PA control line.

The on-chip VCO operates at 2x the output frequency. The divide by 2 at the output of the VCO reduces the amount of PA feedthrough. As a result of this, OOK modulation depths of greater than 50dB are easily achievable.

The FSK_ADJ and ASK_ADJ resistors can be adjusted in the system to optimize output power for each modulation scheme. An additional 1.5dB of output power is provided for the lower bank of channels to adjust for antenna performance.

The CE line allows the transmitter to be powered down completely. In this mode the leakage current is typically 0.1µA.


  • Single-chip, Low-power UHK Transmitter
  • 369.5 MHz to 395.9 MHz Frequency Operation using Fractional-N PLL and Fully-integrated VCO
  • 3.0 V Supply Voltage
  • Data Rates Supported < 20 kbps
  • Low Current Consumption 26mA at 12dBm Output at 384 MHz
  • Power-down Mode (<1µA)
  • 24-Lead TSSOP Package

Functional Block Diagram for ADF7901

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
ADF7901: High Performance ISM Band 00K/FSK Transmitter IC Data Sheet (Rev A, 03/2006) (pdf, 164 kB) Data Sheets 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
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

ADF7901 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADF7901BRUZ Status: Production 24 ld TSSOP 24 Ind Tube, 62 $1.66 $0.99 Y  Material Info PCN Purchase Sample
ADF7901BRUZ-RL Status: Production 24 ld TSSOP 24 Ind Reel, 2500 - $0.99 Y  Material Info PCN Purchase
ADF7901BRUZ-RL7 Status: Contact ADI 24 ld TSSOP 24 Ind Reel, 1000 - $0.99 Y  Material Info PCN/PDN 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.

ADF7901 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-ADF7901EBZ Status: Production Evaluation Board for ADF7901 $70.84 Yes -
EVAL-ADF790XEBZ Status: Production Evaluation kit comprising ADF7901 transmitter and ADF7902 receiver boards (369.5 MHz - 395.9 MHz) $151.80 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.

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