RF Transceivers for
Short Range Devices
Features
• 75 MHz to 1 GHz operation
• Development platform:
ADlismLINK, ADI SRD
Design Studio
• High sensitivity performance
• FSK/GFSK/ASK/OOK/GOOK/MSK
modulation
• Data rates up to 384 kbps
• Low external BOM
• Output power up to 14 dBm
Applications
• Automatic meter reading (AMR)
• Building control/automation
• Industrial process control
• Residential security
and automation
• Wireless sensor networks
• Healthcare monitoring
• TV wireless remote control
• Voice over RF transmission
• Suitable for:
• FCC Part 15 (U.S.)
Overview
The ADF7000 series of transmitter and transceiver ICs provides high performance, robust,
short range wireless connections. Covering the 75 MHz to 1 GHz frequency range, the
ADF7000 series is ideally suited for many applications requiring short range wireless
connectivity. The popular ADlismLINK air interface protocol allows users to transfer data
between multiple endpoints and a base station (ADF702x) without having to develop their
own protocol software. This greatly speeds the time to market of the final product. In
addition, ADI SRD Design Studio™ allows real-time simulation and optimization of many of
the parameters in a typical wireless system using the ADF7000 family of transceivers and
transmitters.
• FCC Part 90 (U.S.)
• ARIB STD-T67 (Japan)
• EN300 220 (Europe)
• Licensed bands from
75 MHz to 1 GHz
ADF7000 Series Highlights
• Single-chip transmit and receive with few external components
• Excellent link margin and resilience to interfering signals
• Reference designs available including Gerber files
• ADlismLINK protocol—allows user to establish a radio link straight out of the box
• ADI SRD Design Studio—for real-time simulation and optimization
www.analog.com/srd
ISM Transceivers
Specification
ADF7020
ADF7020-1
ADF7021
ADF7025
431 to 478, 862 to 956
80 to 650
80 to 650, 868 to 940
431 to 464, 862 to 928
GFSK/FSK/ASK/OOK/GOOK
GFSK/FSK/ASK/OOK/GOOK
GFSK/FSK/2FSK/3FSK/4FSK/MSK
2FSK/3FSK/4FSK/MSK
FSK
2.3 to 3.6
2.3 to 3.6
2.3 to 3.6
2.3 to 3.6
19
17.6
17.55 @ 426 MHz
19
19.1
13 @ 433 MHz
13.55 @ 426 MHz
19.3
–16 to +13 in 0.3 dBm steps
–16 to +13 in 0.3 dBm steps
–16 to +13
13 in 0.3 dBm steps
–16 to +13 in 0.3 dBm steps
–119 dBm (fo = 915 MHz)
–119 dBm (fo = 315 MHz)
–122 dBm
Bm (fo = 868 MHz)
–108 dBm (fo = 915 MHz)
Maximum Data Rate (kbps)
200
200
32.5
384
Automatic Frequency Control
Yes
Yes
Yes
No
7-Bit Digital RSSI Output
Yes
Yes
Yes
Yes
Automatic PA Ramp
No
No
Yes
No
Narrow-Band Operation (12.5 kHz to 25 kHz)
No
No
Yes
No
XTAL/PLL loop filter/matching
XTAL/PLL loop filter/matching
TCXO/PLL loop
oop filter/matching
XTAL/PLL loop filter/matching
7 mm 3 7 mm, 48-lead LFCSP
7 mm 3 7 mm, 48-lead LFCSP
7 mm 3 7 mm,
m 48-lead LFCSP
7 mm 3 7 mm, 48-lead LFCSP
Frequency (MHz)
Modulation
Supply Voltage (V)
Rx Current (mA)
Tx Current for 0 dB Output (mA)
Output Power (dBm)
Rx Sensitivity (BER 0.1% @ 1 kbps)
3
ADF7020—transceiver block diagram.
External Components Needed
Package (RoHS-Compliant)
ISM Transmitters and Receivers
Specification
ADF7012
ADF7901
ADF7902
Frequency (MHz)
75 to 1000
369.5 to 395.9
369.5 TO 395.9
GFSK/ASK/FSK/OOK/GOOK
FSK/OOK
FSK/OOK
2.3 to 3.6
–0.3 to 6.0
–0.3 to 6.0
Current for 0dBm Output (mA)
8
8
18.5
Output Power (dBm)
14
14
N/A
Maximum Data Rate (kbps)
179.2
50
2
Synthesizer Phase Noise Floor (dBc/Hz)
–194
–194
N/A
XTAL/PLL loop filter/matching
XTAL/PLL loop filter/matching/LPF
XTAL/PLL loop filter/matching
24-lead TSSOP
24-lead TSSOP
24-lead TSSOP
Modulation
Supply Voltage (V)
External Components Needed
Package (RoHS-Compliant)
ADF7012—transmitter block diagram.
16
SR = 4.8ksym/s
DATA = PRBS9
fDEV = 2.4kHz
RF FREQ = 869.5MHz
4FSK
RC4FSK
PA BIAS = 11𝛍A
12
8
RF OUTPUT POWER (dBm)
2
4
TEMP
SENSOR
RLNA
PA BIAS = 5𝛍A
–4
PA BIAS = 7𝛍A
–8
VBW 300Hz
ADF7021 — output spectrum in 4FSK and raised cosine 4FSK modes.
7-BIT ADC
2FSK
3FSK
4FSK
LNA
RF IN
RSSI/
LOG AMP
IF FILTER
RF INB
MUX OUT
LDO(1:4)
TEST MUX
CLOCK
AND DATA
RECOVERY
DEMODULATOR
Tx/Rx CLK
Tx/Rx
CONTROL
Tx/Rx DATA
SWD
–12
GAIN
–16
AGC
CONTROL
–20
SLE
SERIAL
PORT
–24
AFC
CONTROL
PA RAMP
–28
–32
SPAN 100kHz
SWEEP 4.237s (601pts)
MUX
CREG(1:4)
0
DIV P
÷1/÷2
RF OUT
–36
CENTER 869.493 8MHz
RES BW 300Hz
CE
RSET
PA BIAS = 9𝛍A
VCO1
N/N + 1
2FSK
3FSK
4FSK
MOD CONTROL
MODULATOR
÷2
–40
0
4
8
12 16 20 24 28 32 36 40 44 48 52 56 60
MUX
VCO2
PFD
DIV R
PA SETTING
ADF7021 — output power vs. PA setting.
L1
L2
VCO IN
CP OUT
ADF7021—transceiver block diagram.
OSC
OSC1
OSC2
CLK
DIV
CLK OUT
SREAD
SCLK
GAUSSIAN/
RAISED COSINE
FILTER
3FSK
ENCODING
CP
SDATA
ADF7021 sensitivity is 7 dB better than competition at low data rates
Sensitivity Comparison @ 1 kbps for 915 MHz/868 MHz Transceivers
0
COMP 6
COMP 5
COMP 4
COMP 3
ADF7020
(–119 dB)
–80
COMP 2
ADF7021
(–123 dB)
–60
COMP 1
ADF7020
–40
ADF7021
SENSITIVITY (dB)
–20
–100
–120
–140
COMP 1
(–116 dB)
COMP 2
(–110 dB)
COMP 3
(–113 dB)
COMP 4
(–100 dB)
COMP 5
(–111 dB)
ADF7021 and ADF7020 VS. COMPETITION
Typical Applications
• Industrial process control
• Automatic data acquisition from
remote sensors
• Extend existing control systems
• Automatic Meter Reading (AMR)
• Automatic data acquisition from
remote sensors reduces user
intervention
• Applications for energy/water/
gas metering
• Home building automation
• Wireless control for shutters,
awning, garage door, etc.
• Wireless control for
lighting/heating/cooling
• Wireless sensor for security/
alarm systems/PIR detectors
Summary
Sensitivity—Best in Class
• ADF7021 sensitivity is 7 dB better than competition at low data rates
Resilience
• Better blocking and IP3 performance
PA Efficiency
• Efficient PA operates at up to +14 dBm
Other Applications
AFC—Automatic Frequency Control
• Wireless security
• Removes the need to calibrate the XTAL at production
• Remote patient monitoring
PA Ramp profile
• Auto—key fobs, tire pressure
monitor
• Automatic PA ramping feature reduces unwanted emissions
• Remote control
• Wireless headphones
• Remote toys
Low Cost
• Price competitive
Complete Solution
• Board layout and antenna reference designs
• Networking protocol kit (ADIismLINK)
• ADI SRD Design Studio
COMP 6
(–106 dB)
4
ADI SRD Design Studio
A tool for designers of wireless links
Overview
ADI SRD Design Studio enables users to design, evaluate, and troubleshoot short range communications devices utilizing Analog Devices' ADF7000
family of SRD transmitters and transceivers. ADI SRD Design Studio can quickly and efficiently conduct real-time simulations, test various
configurations, and troubleshoot potential problems when implementing short range wireless links in designs.
5
List of Tasks Available:
• New design wizard
• Packet formatting
• Sync detection
• Power consumption
20
25
10
20
0
15
–10
10
Deviation (kHz)
• Antenna/filter
Conducted Power (dBm)
• Frequencies worksheet
• Transmitter spectrum
Modulation Domain Analyzer
Spectrum Analyzer
• Link budget
–20
–30
–40
5
0
–5
–10
–50
–15
–60
–20
–70
–250 –200 –150 –100 –50
Highlights of SRD Design Studio
0
50
100
150
200
250
Frequency (kHz)
–25
0
100 200 300 400 500 600 700 800 900 1000 1100
Time (us)
• Eliminates time consuming
iterations from the design process SRD Design Studio—spectrum analyzer and modulation domain analyzer screenshots.
• Enables rapid prototype
development and design
optimization
• FCC, ETSI, and ARIB compliant
designs
Free to download from: www.analog.com/srddesign
www.analog.com/srd
ADF702x Development Platform
The ADF702x development platform provides the hardware and software to demonstrate, evaluate, and develop
a low power, low data rate, wireless network using any of the ADF702x SRD transceivers. The platform provides
over-the-air communication protocols (ADIismLINK) intended for use in the license-free ISM bands and adheres
to the regulations specified by ETSI (433 MHz and 868 MHz) and the frequency hopping requirements of FCC
15.247 (902 MHz to 928 MHz). The platform allows straightforward yet comprehensive configuration of the
physical (PHY) and media access control (MAC) layers of the ADIismLINK protocol using the provided application
software. This allows users to investigate the trade-offs in the protocol performance and also modify the
protocol to suit their application.
Evaluation Boards for SRD Transceivers/Transmitters
Analog Devices provides a complete range of evaluation boards for its portfolio of SRD transmitter and
transceiver products. These evaluation boards come with user-friendly driver software, which allows our
customers to rapidly evaluate the actual performance of our SRD transmitter and transceiver ICs. When
used in conjunction with ADIismLINK, a customer can quickly and accurately design, optimize, and breadboard
a new radio system, thereby reducing cycle time and improving time to market. A complete list of evaluation
boards, associated documentation, and driver software are available via our website at www.analog.com/srd.
Analog Devices, Inc.
Worldwide Headquarters
Analog Devices, Inc.
One Technology Way
P.O. Box 9106
Norwood, MA 02062-9106
U.S.A.
Tel: 781.329.4700
(800.262.5643,
U.S.A. only)
Fax: 781.461.3113
For further information, visit www.analog.com/srd.
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Germany
Tel: 49.89.76903.0
Fax: 49.89.76903.157
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South Tower Building
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Headquarters
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©2007 Analog Devices, Inc. All rights reserved.
Trademarks and registered trademarks are the
property of their respective owners.
PH05601-5-9/07(B)
Printed in the U.S.A.
www.analog.com/srd