Atmel-42277-Wireless-SoC-Reference-Design-with-RFMDs-RF6575 AP-Note AT04466

APPLICATION NOTE
AT04466: Wireless SoC Reference Design with RFMDs
RF6575
Atmel MCU Wireless
Description
The Atmel® RFSM6575RC128A-410 reference design is a partnership between RFMD
and Atmel Corporation. This design presents a complete 2.4GHz IEEE® 802.15.4compliant radio transceiver solution that conforms to FCC CFR47 part 15 and CE.
Atmel introduces the ATmega128RFA1 and ATmega256RFR2 as its ZigBee® platform
which incorporates a low power 2.4GHz radio frequency transceiver and a High
Performance, Low Power AVR®, 8-bit microcontroller into a single 9mm x 9mm x
0.9mm 64-pin QFN package.
RFMD presents a world class Front End Module (FEM), RF6575 for efficient extended
output power above 20dBm with harmonic filtering, Antenna Diversity switch and LNA.
Features
•
•
•
•
•
•
•
Output power +22dBm (>100mW)
Industry leading 126.5dB link budget
Sensitivity: -104.5dBm, 1% PER
Low Harmonic Content
Antenna Diversity
RoHS Compliant
Single differential bidirectional TX/RX interface
Figure 1.
RFSM6575RC128A-410.
42277A−WIRELESS−04/2014
Table of Contents
1. Overview ............................................................................................ 3
1.1
1.2
1.3
1.4
1.5
RF6575 ............................................................................................................. 3
Atmel ATmega128RFA1/ATmega256RFR2 ..................................................... 3
Hardware .......................................................................................................... 3
Software ............................................................................................................ 3
Applications ....................................................................................................... 3
2. Functional Descriptions ...................................................................... 4
2.1
2.2
2.3
Connectors ........................................................................................................ 4
EEPROM .......................................................................................................... 4
RF Communication ........................................................................................... 4
3. Mechanical Descriptions .................................................................... 4
3.1
3.2
3.3
3.4
3.5
Layer Stack-up .................................................................................................. 4
Shielding ........................................................................................................... 5
RF Layout Optimization..................................................................................... 5
Differential (using balun) versus Single-Ended (no balun) Layout..................... 5
Differential (using balun) versus Single-Ended (no balun) Schematic............... 6
4. Evaluation and Configuration ............................................................. 6
4.1
4.2
4.3
4.4
4.5
Equipments Required........................................................................................ 6
Evaluation Boards ............................................................................................. 6
Steps for Installing and Configuring the Demo Board ....................................... 7
Transmission Performance Evaluation............................................................ 10
Packet Error Test Rate.................................................................................... 11
5. Transmission Performance .............................................................. 14
5.1
5.2
Transmit Output Power Performance .............................................................. 14
RX Sensitivity Performance ............................................................................ 15
5.2.1
Simple Sensitivity Calculation ........................................................... 15
5.2.2
Single-ended versus Differential Sensitivity ...................................... 15
5.2.3
Additional Harmonic Filtering versus No Filter .................................. 15
5.2.4
Harmonic Filter Affect on Sensitivity ................................................. 15
6. FCC Compliance Measurements ..................................................... 16
7. References ...................................................................................... 18
8. Revision History ............................................................................... 19
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
2
1.
Overview
1.1
RF6575
The RF6575 [2] FEM serves as a single-chip medium power >100mW (20 to 22dBm) of output power Smart Energy
front end solution. The RF6575 integrates the PA with harmonic filtering, LNA, SPDT switch for TX/RX functionality,
DP2T switch for antenna diversity and a 50Ω single-ended bidirectional TX/RX interface all on a single 3.5mm x 3.5mm
x 0.5mm QFN 20-Pin package.
1.2
Atmel ATmega128RFA1/ATmega256RFR2
The IC integrates a powerful, AVR 8-bit RISC microcontroller, an IEEE 802.15.4-compliant transceiver, and additional
peripheral features. The built-in radio transceiver supports the worldwide accessible 2.4GHz ISM band. The system is
designed to demonstrate standard-based applications such as ZigBee/IEEE 802.15.4, ZigBee RF4CE, and 6LoWPAN,
as well as high data rate ISM applications.
1.3
Hardware
The RFSM6575RC128A-410 reference design serves as a proven >100mWatt range extension for the
ATmega128RFA1/ATmega256RFR2 with a link budget of 126.5dB. The RF6575, RF6555 [3], RFFM6201, RF6545, and
RF6505 [3] also serve as range extensions for the ATmega128RFA1/ATmega256RFR2, AT86RF231, and AT86RF233
radio transceivers [1].
The RFSM6575RC128A-410 demo board can be purchased from RFMD e-store (www.rfmd.com) and RFMD support
contact email [email protected]
1.4
Software
The RFSM6575RC128A-410 demo board comes pre-flashed with the Performance test EVK application from MAC
2.8.0 stack software interface to allow for performance verification. For information about IEEE MAC Stack 2.8.0 and
the user guide for the Atmel AVR2025: IEEE 802.15.4 MAC Software Package visit,
www.atmel.com/tools/IEEE802_15_4MAC.aspx for details.
1.5
Applications
This application note serves to provide a developer with data, evaluation steps, and design tools to implement an IEEE
802.15.4 solution using the RF6505RC128A reference design.
•
•
•
•
ZigBee 802.15.4 Based Systems for Remote Monitoring and Control
Communications Hub for Smart Energy/Home Automation
Smart metering for energy management applications
Building Automation
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
3
2.
Functional Descriptions
2.1
Connectors
The RFSM6575RC128A-410 is equipped with two 50mil, 30-pin connectors (EXT0/1), which are parallel to each other
and 22mm apart. These are for interfacing with the Sensor Terminal Board [6] or RCB-Breakout Board [7].
2.2
2.3
EEPROM
•
An EEPROM is provided on the RFSM6575RC128A-410 to identify the transceiver and software. It also has
the production calibration and MAC address information stored.
•
This EEPROM may not be required on the final product once the user’s design is complete
RF Communication
•
The RFSM6575RC128A-410 boards are also equipped with two PCB antennas A1 and A2 for antenna
diversity over the air testing
•
The reference design also supports conducted testing by use of J11 an MS-147 receptacle which is Digi-Key
P/N H2800DKR-ND that mates to Digi-Key P/N H2802-ND
•
It also contains SMA female connector X1, which is Digi-Key P/N J500-ND, which is also for conducted
measurements
3.
Mechanical Descriptions
3.1
Layer Stack-up
The RFSM6575RC128A-410 is made using a 4-layer design on standard FR4 material (IS400) with a total thickness of
66mils. It can be designed on a two layer board [4]. The top and bottom layers are large copper planes whose grounds
are stitched together with through-hole vias that are in close proximity of GND pins of critical RF components [4].
•
The top layer contains a solid 1oz base copper and plating for digital ground plane and is used for RF and
digital signal routing. It has isolation in-between digital and RF traces.
•
•
•
The filter-balun B1 requires a solid ground connection
•
The bottom layer is a digital ground plane shared with RF and made with solid 1oz base copper and plating.
See Figure 3-1 for layer stack-up details.
Middle layer 1 is a solid digital ground
Middle layer 2 is an internal layer and a solid power plane with nets to VCC and V_RCB. The power plane
should be surrounded with through-hole ground vias which connect the ground layers together.
Figure 3-1. RFSM6575RC128APCBA-410 Layer Stack-Up
Note:
It is highly recommended by RFMD to follow the PCB layout as closely as possible as deviations from the
layout can change the reference designs performance.
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
4
3.2
Shielding
The reference design does not contain a metal shield. However, it might be necessary to protect the ICs from external
noise and strong interference.
Such shields may suppress radiated harmonics from the reference design but is not necessary. The recommended size
for the metal shield is 30mm x 25mm.
3.3
RF Layout Optimization
The RF6575 ground pad via pattern is a 3x3 pattern (see Figure 3-2), with through-hole vias that route from the top
layer to the bottom layer. Via hole size is 12mils and the diameter is 24mils. This is for thermal dissipation and to
provide a short return path for the signal.
The final product may include removing the solder mask or solder resist from the bottom layer beneath the ground pad
for improved thermal dissipation.
Figure 3-2. RF6575 Ground Slug Via Pattern
3.4
Differential (using balun) versus Single-Ended (no balun) Layout
From an RF point of view the trace coming from RFP and RFN contains an open stub at R12 (assuming C1, R12, and
R13 are not mounted).
While the balun is being used this trace may cause unwanted emissions but it may be in the 7GHz to 10GHz range
because of its length. Since it is at the input of the FEM and not at the output of the FEM the emissions should be at a
minimum.
The end user however, should choose to either to use this trace for single-ended designing or to cut the trace if the
balun B1 is used.
Figure 3-3. Layout From the Top Layer and How to Find the Trace Connected to R12
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
5
3.5
Differential (using balun) versus Single-Ended (no balun) Schematic
When design using the RFSM6575RC128A-410 reference design. You can choose either a differential interface or a
single ended interface depending on design requirements. Figure 3-4 show how to design the schematic between the
RF6575 and Atmel ATmega128RFA1/ATmega256RFR2 with the two configurations.
Figure 3-4. Differential and Single End RF6575/MEGARF Interface
4.
Evaluation and Configuration
4.1
Equipments Required
•
•
•
•
•
•
•
•
4.2
Either the RCB Sensor Terminal Board (STB) [6] or Radio Controller Board Breakout Board (RCB-BB) [7]
Signal or Spectrum analyzer for conducted measurements
Computer with terminal emulator application
SMA MS-147 Cables (2 Nos)
RCB Breakout Board RS232 Cable (if using RCB-BB)
USB cable (if using STB)
3V – 4V DC Supply (if using RCB-BB)
Power meter
Evaluation Boards
RFSM6575RC128A-410 demo board is evaluated on the Atmel RCB Sensor Terminal Board (Figure 4-1) or the Atmel
Radio Controller Board Breakout Board (Figure 4-2). The Sensor Terminal Board (STB) is intended to establish a USBbased UART connection, programming interfaces, and to provide an RCB power supply using the USB cable. The
Radio Controller Board Breakout Board (RCB-BB) is intended for connection with an RS-232 serial port, JTAG
programming interface, and remote power supply.
Ordering information for the STB and RCB-BB, as well as descriptions, technical data, documentation, and drivers can
be found at www.dresden-elektronik.de/funktechnik/products/boards-and-kits/development-boards/. These drivers
support Windows® XP and Windows 7 environments.
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
6
Figure 4-1. Sensor Terminal Board
Figure 4-2. RCB Breakout Board RS232 Cable Connected to RCB-BB
4.3
Steps for Installing and Configuring the Demo Board
1.
2.
To control the RFSM6575RC128A-410 that is mounted on the STB, a USB connection between the STB and a
host PC is required.
Connect USB X2 connector of the STB with a host-PC USB interface. This causes a driver installation
procedure to install a basic device driver in the first run, and a serial driver on top of the basic USB STB driver
in the second run. If the STB is connected the first time, the "Found New Hardware Wizard" dialogue displays.
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
7
3.
4.
If the installation does not start automatically, download the necessary driver from
www.ftdichip.com/Products/ICs/FT245R.htm. Select the path where the driver was downloaded before.
Perform both installation procedures in a similar way. After completion, the Windows Device Manager
(Start>Settings>Control Panel>System>Hardware>Device Manager) displays the assigned COM port number
under Ports (COM&LPT).
Figure 4-3. Device Manager after Driver Installation
5.
6.
Note this COM port number to configure the terminal application controlling the RCB.
To establish a connection to the RFSM6575RC128A-410 reference design board and enable the test menu
options the following information must be stored in the terminal emulator application.
Note:
PuTTY was used for the purposes of this document.
7.
Choose the following settings in the relevant COM port:
Baud (Bits per second): 9600
8.
Parity:
None
Data Bits:
8
Stop Bits:
1
Flow Control:
None
Press any key to establish communication with the RFSM6575RC128A-410 reference board.
The images below display once the RFSM6575RC128A-410 board is connected properly. Images of the various menu
options that configure the reference board accordingly for transmit and receive testing are also shown below.
Note:
After establishing a connection with the computer terminal, the RFSM6575RC128A-410 board searches for a
peer device. This feature allows the remote RFSM6575RC128A-410 board to operate without a computer
terminal. For transmission performance testing (single node) mode, press the Enter key on the computer to
skip this search. The main menu for the Transmission Performance Evaluation section is displayed as
shown in Figure 4-4.
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
8
Figure 4-4. Starting the Terminal Emulator (main screen)
Figure 4-5. Transceiver Configuration Menu Screen
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
9
4.4
Transmission Performance Evaluation
1.
2.
3.
4.
Note:
5.
From the single-node main menu, press 1 to enter the Transceiver Configuration menu (Figure 4-5).
Set the Channel to the channel to test. The default is Channel 21. To change the channel press C, type
channel number (11…26) and press Enter.
Set the TX power level, the default is 20dBm.
•
Press W to change the power level
•
Press A for absolute and type the power level in dBm (or)
• Press R for register value; type a two digit hexadecimal value (00…0F) and press Enter
Press Y to select antenna and enter 1 or 2. Press Y again to re-enable Antenna diversity wherein both
antennas are used.
Antenna diversity should be disabled while validating only one antenna.
Press O to leave Transceiver Configuration menu.
Figure 4-6. Transceiver State Selection Menu Screen
6.
7.
8.
From the Main Menu, press 2 to enter Transceiver State Selection menu (see Figure 4-6).
Set Antenna diversity if it has not been configured earlier. This setting can be configured similar to
Transceiver Configuration menu.
Press U to start transmission.
•
Select C for continuous waveform
Select P for modulated (Pseudo Random Binary Sequence) waveform (see Figure 4-7). At this point the
demo board is transmitting a signal
9. Spectrum analyzer or Power meter connected to the antenna feed point displays the output power level.
10. Press any key to terminate transmission.
•
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
10
Figure 4-7. Starting Continuous Transmission
4.5
Packet Error Test Rate
Two RFSM6575RC128A-410 boards are required to perform PER testing and the setup is show in Figure 4-8. One
board acts as a transmitter and it requires a computer terminal. Another board acts as receiver for which a computer
terminal is optional.
Apply power to transmitter board. With terminal emulator window active, press any key to begin search for peer device
(receiver) as shown in Figure 4-9. While the transmitter is searching (approximately 12 seconds), apply power to
Receiver board. When the receiver is detected, the transmitter and receiver will display a script reading Peer device
found.
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
11
Figure 4-8. Packet Error Rate (PER) Testing Setup
Figure 4-9. Successful Detection of Peer Node
1.
2.
Set the Channel number to the channel to test. The default channel is 21.
To change the Channel press C.
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
12
3.
4.
5.
6.
7.
8.
Note:
Type the two digit channel number (11…26) and press Enter.
Set the transmit power level. The default power level is 20dBm.
•
Press W to change the power level
•
Press A for absolute and type the power level in dBm (or)
• Press R for register value; type a two digit hexadecimal value (00…0F) and press Enter
Press A to Toggle ACK request until it reads no ACK requested.
Press F to Toggle Frame Retry until it reads False.
Press M to Toggle CSMA enabled until it reads False.
Select the antenna for transmission. Toggle the antenna by pressing Y.
For validating one Receiving antenna it is required to disable antenna diversity and choose that particular
antenna.
Press Z to toggle RF Front End control until it reads enabled.
10. Press O to return to Main menu. Then Press 3 to enter the PER-Test Configuration menu.
9.
11. Set the number of packets for transmission. The default number is 100. To change the number of packets,
press N, specify the number of frames and press Enter.
12. Select the antenna for reception by pressing Q, followed by C and then 2 or 3.
In the main menu, press 5 and the text Transmitting… Wait until test is completed is displayed on the screen. The
main screen displays the number of packets received and this defines the PER value (Figure 4-10).
For example,
1000/1000 equates to 0% PER
990/1000 equates to 1% PER
Average PER < 1% at -100dBm
Figure 4-10. Terminal Screen after PER Test
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
13
5.
Transmission Performance
5.1
Transmit Output Power Performance
Table 5-1.
Measured Transmit Output Power Across Channels
Channel/MHz
POUT[dBm] @ -30°C
POUT[dBm] @ 25°C
POUT[dBm] @ 85°C
Channel 11 (2405)
22
22
20.9
Channel 12 (2410)
22
21.9
20.8
Channel 13 (2415)
22
21.8
20.8
Channel 14 (2420)
21.9
21.7
20.7
Channel 15 (2425)
21.8
21.6
20.6
Channel 16 (2430)
21.7
21.4
20.4
Channel 17 (2435)
21.5
21.4
20.4
Channel 18 (2440)
21.5
21.4
20.4
Channel 19 (2445)
21.4
21.4
20.3
Channel 20 (2450)
21.3
21.3
20.3
Channel 21 (2455)
21.3
21.3
20.2
Channel 22 (2460)
21.2
21.2
20.2
Channel 23 (2465)
21.1
21.1
20.1
Channel 24 (2470)
21.0
21.0
20.1
Channel 25 (2475)
21.0
21.0
20.1
Channel 26 (2480)
21.0
21.0
20.1
Table 5-2.
Measured 2nd Harmonic over Temperature
Channel/MHz
H2[dBm/MHz] @ -30°C
H2[dBm/MHz] @ 25°C
H2[dBm/MHz] @ 85°C
Channel 11 (2405)
-66
-55.3
-52.4
Channel 19 (2450)
-52.9
-50.3
-51.2
Channel 26 (2480)
-48.8
-45.6
-47.1
Table 5-3.
Measured 3rd Harmonic over Temperature
Channel/MHz
H3[dBm/MHz] @ -30°C
H3[dBm/MHz] @ 25°C
H3[dBm/MHz] @ 85°C
Channel 11 (2405)
-45.5
-51.8
-51.2
Channel 19 (2450)
-45.3
-52.1
-51.2
Channel 26 (2480)
-48.8
-53.5
-51.5
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
14
5.2
RX Sensitivity Performance
Table 5-4.
Measured RX Sensitivity Across Channels
Rx sensitive data (250kbps)
1% (PER)
20% (PER)
Channel 11
-104.5
-105.5
Channel 19
-104.5
-105.5
Channel 26
-104.5
-105.5
The output power from the Transmit RFSM6575RC128A-410 board should be measured separately as done on section.
This power level is needed as a baseline for calculating the attenuation level between the Transmit RFSM6575RC128A410 board and Receive RFSM6575RC128A-410 board.
5.2.1
Simple Sensitivity Calculation
A very simple way to determine the expected sensitivity of a radio system is that the external LNA should improve the
radio by approximately the noise figure of the transceiver minus the noise figure of the external LNA.
I.e. = Sensitivity – (TXVR N.F. – FEM N.F. – Filter Loss).
5.2.2
Single-ended versus Differential Sensitivity
•
5.2.3
5.2.4
The RF6575 improves the sensitivity of the Atmel ATmega128RFA1 by 3.5dB in the Single-ended design and
4dB in the Differential design
Additional Harmonic Filtering versus No Filter
•
The RFSM6575RC128A-410 does not need any additional harmonic filtering components (C17, L4, and C21
on antenna1 and C22, L3, and C20 on antenna2) to satisfy FCC emissions requirements when operating at an
EIRP of ≤+20dBm
•
However, the RFSM6575RC128A-410 does need the additional harmonic filtering for an EIRP of >+20dBm in
order to satisfy FCC emissions requirements
•
The harmonic filter on the RFSM6575RC128A-410 allows the reference design to achieve an output power of
up to +23dBm single-ended and +22dBm differential while still complying with FCC regulations at 3.3V
operation
Harmonic Filter Affect on Sensitivity
•
The harmonic filter (C17, L4, and C21 on antenna1 and C22, L3, and C20 on antenna2) reduces the overall
sensitivity by ~1dB. The RFSM6575RC128A-410 can achieve a sensitivity of up to -106dBm at ≤1% PER
without the harmonic filter.
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
15
6.
FCC Compliance Measurements
This section provides the harmonics performance and FCC pre-compliance test results of RFSM6575RC128A-410
board.
Figure 6-1. Channel 19 Second Harmonic Conducted (POUT = 20.6dBm)
Re f
0
* Att
0 dB m
Of f s e t
1 0 dB
* RBW 1 MHz
* V B W 10 0 k Hz
* S W T 25 0 m s
M a r k e r 1 [T 1 ]
- 5 3 . 8 9 d Bm
4. 8 9 09 2 9 4 8 7 G Hz
0.8 dB
A
-10
1 AV *
MAXH
-20
LVL
-30
-40
-50
EXT
1
3DB
-60
-70
-80
-90
-100
C e n t er
4.89 GHz
1 MHz/
S p an
1 0 M Hz
Figure 6-2. Channel 19 Third Harmonic Conducted (POUT = 20.6dBm)
Ref
0
* At t
0 dB m
O f fs et
10 dB
* RB W 1 MH z
* VB W 10 0 k H z
* SW T 25 0 m s
Ma r k er 1 [ T 1 ]
- 51 . 12 dB m
7 . 33 6 3 14 1 03 GH z
0.8 dB
A
-10
1 AV *
MAXH
-20
LVL
-30
-40
1
-50
EXT
3DB
-60
-70
-80
-90
-100
C e nt e r
7. 33 5 G Hz
1 MHz/
S pa n
10 MH z
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
16
Figure 6-3. Channel 11 Power Spectral Density (POUT = 21.1dBm)
* RBW 3 kHz
Ref
20
1 PK
M AX H
* Att
25.8 dBm
Offset
20 dB
* VBW 10 kHz
* SWT 10 s
Marker 1 [T1 ]
5.31 dBm
2.404849359 GHz
0.8 dB
A
10
1
LV L
0
- 10
- 20
EX T
3D B
- 30
- 40
- 50
- 60
- 70
Center 2.405 GHz
200 kHz/
Span 2 MHz
Figure 6-4. Channel 19 Power Spectral Density (POUT = 20.6dBm)
R ef
20
1 PK
M A XH
* Att
25.8 dBm
Offset
20 dB
* RBW 3 kHz
* VBW 10 kHz
* SWT 10 s
Marker 1 [T1 ]
6.24 dBm
2.444583333 GHz
0.8 dB
A
10
1
L VL
0
-1 0
-2 0
E XT
-3 0
3 DB
-4 0
-5 0
-6 0
-7 0
Center 2.445 GHz
200 kHz/
Span 2 MHz
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
17
Figure 6-5. Channel 26 Power Spectral Density (POUT = 19.5dBm)
R ef
20
1 PK
MAXH
* A tt
25.8 dBm
Of f s e t
20 dB
* RBW 3 kHz
* V B W 1 0 k Hz
* SWT 10 s
M a r ke r 1 [ T 1 ]
2.45 dBm
2. 4 8 0 1 4 7 4 3 6 G H z
0 .8 d B
A
10
1
LVL
0
-10
-20
EXT
-30
3DB
-40
-50
-60
-70
C en t er
7.
2 . 4 8 G Hz
2 00 kH z /
S p a n 2 MH z
References
[1] Atmel ATmega256RFR2 Datasheet, http://www.atmel.com/products/wireless/802154[2]
[3]
[4]
[5]
[6]
[7]
microcontrollers/default.aspx.
RF6575 Datasheet, http://www.rfmd.com/CS/Documents/RF6575DS.pdf.
RF6555+ATmega256RFR2 reference design, http://www.rfmd.com/atmel/zigbeerf.aspx.
Atmel AVR10004 RCB256RF2-Hardware User Manual, http://www.atmel.com/Images/Atmel-42081RCB256RFR2-Hardware-User-Manual_Application-Note_AVR10004.pdf.
FCC Code of Federal Register (CFR); Part 47; Section 15.35, Section 15.205, Section 15.209, Section 15.231.
Sensor terminal board: www.dresden-elektronik.de/funktechnik/service/download/documentation/?L=1#c3646.
RCB Breakout board: www.dresden-elektronik.de/funktechnik/produkte/boards-und-kits/developmentboards/rcb-breakout-board
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
18
8.
Revision History
Doc. Rev.
Date
Comments
42277A
04/2014
Initial document release
AT04466: Wireless SoC Reference Design with RFMDs RF6575 [APPLICATION NOTE]
42277A−WIRELESS−04/2014
19
Atmel Corporation
Atmel Asia Limited
Atmel Munich GmbH
Atmel Japan G.K.
1600 Technology Drive
Unit 01-5 & 16, 19F
Business Campus
16F Shin-Osaki Kangyo Building
San Jose, CA 95110
BEA Tower, Millennium City 5
Parkring 4
1-6-4 Osaki, Shinagawa-ku
USA
418 Kwun Tong Road
D-85748 Garching b. Munich
Tokyo 141-0032
Tel: (+1)(408) 441-0311
Kwun Tong, Kowloon
GERMANY
JAPAN
Fax: (+1)(408) 487-2600
HONG KONG
Tel: (+49) 89-31970-0
Tel: (+81)(3) 6417-0300
www.atmel.com
Tel: (+852) 2245-6100
Fax: (+49) 89-3194621
Fax: (+81)(3) 6417-0370
Fax: (+852) 2722-1369
© 2014 Atmel Corporation. All rights reserved. / Rev.: 42277A−WIRELESS−04/2014
Atmel®, Atmel logo and combinations thereof, AVR®, Enabling Unlimited Possibilities®, and others are registered trademarks or trademarks of Atmel Corporation
or its subsidiaries. Windows® is a registered trademark of Microsoft Corporation in U.S. and or other countries. Other terms and product names may be
trademarks of others.
Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this
document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE, ATMEL ASSUMES
NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS AND PROFITS, BUSINESS INTERRUPTION, OR LOSS OF
INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no
representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and products descriptions at any time
without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in,
automotive applications. Atmel products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life.
Similar pages