Features and Benefits
- Frequency range (global ISM band):
2400 MHz to 2483.5 MHz
- Programmable data rates and modulation:
IEEE 802.15.4-2006-compatible (250 kbps) GFSK/FSK/GMSK/MSK modulation
50 kbps to 2000 kbps data rates
- Low power consumption:
19 mA (typical) in receive mode
21.5 mA (typical) in transmit mode (PO = 3 dBm)
1.7 μA, 32 kHz crystal oscillator wake-up mode
- High sensitivity (IEEE 802.15.4-2006):
−95 dBm at 250 kbps
- High sensitivity (0.1% BER):
−96 dBm at 62.5 kbps (GFSK)
−93 dBm at 500 kbps (GFSK)
−90 dBm at 1 Mbps (GFSK)
−87.5 dBm at 2 Mbps (GFSK)
- Programmable output power:
−20 dBm to +4.8 dBm in 2 dB steps
- See data sheet for additional Features
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.
- Wireless sensor networks
- Automatic meter reading/Smart metering
- Industrial wireless control
- Wireless audio/video
- Consumer electronics
Markets and Technologies
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
This page contains ordering information for the evaluation board used to evaluate the ADF7242 Low Power IEEE 802.15.4/Proprietary GFSK/FSK Zero-IF 2.4 GHz Transceiver IC.
The low cost and small profile EVAL-ADF7242-PMDZ is a 2.4 GHz, 802.15.4 wireless transceiver board that supports RF to FPGA or processor applications system that utilize PMOD-compatible expansion ports configurable for SPI communication (packet mode). For applications that require data streaming, a synchronous bidirectional serial port (SPORT) interface is also available. The wireless transceiver PMOD board can be configured to operate on the 2400 MHz to 2483.5 MHz ISM band. The board uses a single ADF7242 transceiver.
The EVAL-ADF7242-PMDZ board uses two mini 2.4 GHz chip antennas, an impedance-matched filter, and a balun for minimum RF front-end parts count. The board supports antenna diversity (polarization diversity) and uses two chip antennas mounted orthogonally, which greatly improves performance under multipath fading conditions.
Features & Benefits
- Low Cost, ADF7242 single chip 2.4GHz RF Transceiver IC
- Frequency range (global ISM band): 2400 MHz to 2483.5 MHz
- PMOD Compatible Expansion Ports with SPI Interface
- IEEE 802.15.4 compliant RF transceiver
- Transmission Range: Up to 100m at 250 kbps, Output Power = +3 dBm
- Low Power Consumption: 19 mA at Rx Mode, 21.5 mA at Tx Mode, 1.8 mA at Idle Mode
- Supports Antenna and Polarization Diversity
- Onboard Chip Antennas
- Small Form Factor: 2.35” x 0.8”
Documentation & Resources
AN-1370: Design Implementation of the ADF7242 Pmod Evaluation Board Using the Johanson Technology, Inc., 2450AT18A100 Chip Antenna (Rev. 0)11/20/2015
AN-1268: Reference Design Using the ADF7241/ADF7242 and Skyworks SE2431L (Rev. 0)11/1/2013
AN-1151: Using a Johanson 2450BM14E0007 Impedance-Matched, Integrated Filter Balun with the ADF7241 and ADF7242 (Rev. 0)5/18/2012
AN-1082: Automatic IEEE 802.15.4-2016 Operating Modes (Rev. B)2/22/2011
EVAL-ADF7242-PMDZ User Guide3/22/2019
Intelligence at the Edge Part 3: Edge Node Communication1/2/2018
Wirelessly Linking the Aerospace and Defense World4/1/2015
SWaP: The RF Solution That Can Mean the Difference Between Flying High and Being Grounded2/1/2015
RF Meets Power Lines: Designing Intelligent Smart Grid Systems that Promote Energy Efficiency3/5/2010
Smart Metering Technology Promotes Energy Efficiency for a Greener World7/27/2009
Wireless Short Range Devices and Narrowband Communications7/1/2007
Understand Wireless Short-Range Devices for Global License-Free Systems3/7/2007
The Use of Short Range Wireless in a Multi-Metering System12/1/2006
Software & Systems Requirements
Tools & Simulations
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.
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.
Sample & Buy
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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.