The ADF7242 is a highly integrated, low power, and high performance transceiver for operation in the global 2.4 GHz ISM band. It is designed with emphasis on flexibility, robustness, ease of use, and low current consumption. The IC supports the IEEE 802.15.4-2006 2.4 GHz PHY requirements as well as proprietary GFSK/ FSK/GMSK/MSK modulation schemes in both packet and data streaming modes. With a minimum number of external components, it achieves compliance with the FCC CFR47 Part 15, ETSI EN 300 440 (Equipment Class 2), ETSI EN 300 328 (FHSS, DR > 250 kbps), and ARIB STD T-66 standards.
The ADF7242 complies with the IEEE 802.15.4-2006 2.4 GHz PHY requirements with a fixed data rate of 250 kbps and DSSS-OQPSK modulation. With its support of GFSK/FSK/GMSK/MSK modulation schemes, the IC can operate over a wide range of data rates from 50 kbps to 2 Mbps and is, therefore, equally suitable for proprietary applications in the areas of smart metering, industrial control, home and building automation, and consumer electronics. In addition, the agile frequency synthesizer of the ADF7242, together with short turnaround times, facilitates the implementation of FHSS systems.
The transmitter path of the ADF7242 is based on a direct closed-loop VCO modulation scheme using a low noise fractional-N RF frequency synthesizer. The automatically calibrated VCO operates at twice the fundamental frequency to reduce spurious emissions and avoid PA pulling effects. The bandwidth of the RF frequency synthesizer is automatically optimized for transmit and receive operations to achieve optimum phase noise, modulation quality, and synthesizer settling time performance. The transmitter output power is programmable from −20 dBm to +4 dBm with automatic PA ramping to meet transient spurious specifications. An integrated biasing and control circuit is available in the IC to significantly simplify the interface to external PAs.
The receive path is based on a zero-IF architecture enabling very high blocking resilience and selectivity performance, which are critical performance metrics in interference dominated environments such as the 2.4 GHz band. In addition, the architecture does not suffer from any degradation of blocker rejection in the image channel, which is typically found in low IF receivers. In GFSK/FSK modes, the receiver features a high speed automatic frequency control (AFC) loop, which allows the frequency synthesizer to find and correct any frequency errors in the received packet.
The IC can operate with a supply voltage between 1.8 V and 3.6 V with very low power consumption in receive and transmit modes while maintaining its excellent RF performance, making it especially suitable for battery-powered systems.
The ADF7242 features a flexible dual-port RF interface that can be used with an external LNA and/or PA in addition to supporting switched antenna diversity.
The ADF7242 incorporates a very low power custom 8-bit processor that supports a number of transceiver management functions. These functions are handled by the two main modules of the processor; the radio controller and the packet manager.
See data sheet for additional 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|
|ADF7242: Low-Power IEEE 802.15.4/proprietary FSK Zero-IF 2.4GHz Transceiver IC Preliminary Data Sheet (Rev. PrG) (Rev 0, 07/2010) (pdf, 1117 kB)||Data Sheets|
|AN-1268: Reference Design Using the ADF7241/ADF7242 and Skyworks SE2431L (pdf, 221 kB)||Application Notes|
|AN-1151: Using a Johanson 2450BM14E0007 Impedance-Matched, Integrated Filter Balun with the ADF7241 and ADF7242 (pdf, 419 kB)||Application Notes|
AN-1082: Automatic IEEE 802.15.4 Operating Modes
(pdf, 202 kB)
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)
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)
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)
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)
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)
RF Meets Power Lines: Designing Intelligent Smart Grid Systems that Promote Energy Efficiency
RF DesignLine, March 2010
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Industrial ICs Solutions Bulletin, Volume 10, Issue 8
|RF ICs Solutions Bulletin, Volume 10, Issue 5||Solutions Bulletins||HTML|
RF Source Booklet
(PDF, 4353 kB)
RF IC Product Overview - Version P (02/2014)
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.
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
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