AN196 - Infineon

BF R38 0F
Dri v er A m pl i fier fo r 434 M Hz I S MBan d A ppl i c ati ons
Appl i c ati o n N ote A N 196
Revision: Rev1.1
2010-09-28
RF and P r otec ti on D evi c es
Edition 2010-09-28
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2010 Infineon Technologies AG
All Rights Reserved.
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BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Application Note AN196
Revision History: 2010-09-28
Previous Revision: Rev1.0
Page
Subjects (major changes since last revision)
6
Table 2 updated
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HYPERTERMINAL™ of Hilgraeve Incorporated. IEC™ of Commission Electrotechnique Internationale. IrDA™
of Infrared Data Association Corporation. ISO™ of INTERNATIONAL ORGANIZATION FOR
STANDARDIZATION. MATLAB™ of MathWorks, Inc. MAXIM™ of Maxim Integrated Products, Inc.
MICROTEC™, NUCLEUS™ of Mentor Graphics Corporation. Mifare™ of NXP. MIPI™ of MIPI Alliance, Inc.
MIPS™ of MIPS Technologies, Inc., USA. muRata™ of MURATA MANUFACTURING CO. OmniVision™ of
OmniVision Technologies, Inc. Openwave™ Openwave Systems Inc. RED HAT™ Red Hat, Inc. RFMD™ RF
Micro Devices, Inc. SIRIUS™ of Sirius Sattelite Radio Inc. SOLARIS™ of Sun Microsystems, Inc. SPANSION™
of Spansion LLC Ltd. Symbian™ of Symbian Software Limited. TAIYO YUDEN™ of Taiyo Yuden Co.
TEAKLITE™ of CEVA, Inc. TEKTRONIX™ of Tektronix Inc. TOKO™ of TOKO KABUSHIKI KAISHA TA.
UNIX™ of X/Open Company Limited. VERILOG™, PALLADIUM™ of Cadence Design Systems, Inc. VLYNQ™
of Texas Instruments Incorporated. VXWORKS™, WIND RIVER™ of WIND RIVER SYSTEMS, INC. ZETEX™
of Diodes Zetex Limited.
Last Trademarks Update 2009-10-19
Application Note AN196, Rev1.1
3 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
List of Content, Figures and Tables
Table of Content
1
Introduction ........................................................................................................................................5
2
Typical Measurement Results.........................................................................................................10
3
Measured Graphs .............................................................................................................................11
4
Evaluation Board and layout Information......................................................................................15
Authors..............................................................................................................................................16
List of Figures
Figure 1
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
BFR380F in TSFP-3 Package..............................................................................................................5
Applications for Home–Solutions (Home Comfort, Control and Security) ...........................................7
Schematic for Home Control application at 434 MHz application (operator side) ...............................8
Schematics of the application circuit ....................................................................................................9
Insertion power gain of the BFR380F driver for 434 MHz application ...............................................11
Input 1dB Compression point of the BFR380F driver for 434 MHz application .................................11
Input matching of the BFR380F driver for 434 MHz application ........................................................12
Output matching of the BFR380F driver for 434 MHz application .....................................................12
Reverse isolation of the BFR380F driver for 434 MHz application ....................................................13
Stability K-factor of the BFR380F driver for 434 MHz application .....................................................13
rd
3 order intercept point of the BFR380F driver for 434 MHz application ..........................................14
Photo Picture of Evaluation Board .....................................................................................................15
PCB Layer Information .......................................................................................................................15
List of Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Pin definition.........................................................................................................................................5
Infineon’s bipolar transistors for different driver applications ...............................................................6
Applications for Industrial-Solutions ( Industrial automation) ...............................................................7
Bill-of-Materials.....................................................................................................................................9
Summary of Measurement results (at room temperature) .................................................................10
Application Note AN196, Rev1.1
4 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Introduction
1
Introduction
1.1
Features
• High linearity driver amplifier
• Output 1dB compression point 16.4 dBm
at 434 MHz
• Pb-free (RoHS compliant) package
• Qualified according to AEC Q101
Figure 1
1.2
BFR380F in TSFP-3 Package
Applications
The BFR380F from Infineon Technologies is a bipolar Transistor dedicated for high linearity
applications. Packaged into a TSFP-3 Package, this transistor is easy-to-use for the
designs. The pin configuration is shown in Table 1.
Pin definition
Table 1
Pin
Pin name
1
2
3
B
E
C
Comments
Base of the BFR380F transistor
Emitter of the BFR380F transistor
Collector of the BFR380F transistor
Additionally, Infineon offers a range of other transistors which can be used either as a driver or a
second stage amplifier. Table 2 presents different bipolar transistors and their different applications
as driver amplifiers.
Application Note AN196, Rev1.1
5 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Introduction
Table 2
Infineon’s bipolar transistors for different driver applications
Application
Frequency / MHz
FM
BFR380F
78 … 110
BFP450
BFP650
BFP750
X
VHF
170 … 470
X
UHF
470 … 880
X
X
ISM
434 / 868
X
X
GSM
900
X
DECT
1900
X
SDARS
2330
X
X
WiMax Low
2300 … 2700
X
X
WiMax Middle
3300 … 3700
5.8 GHz Cordless Phone
5800
X
X
X
Thus, the BFR380F component fits to many applications related to signal reception/transmission like
industrial, scientific and medical (ISM) applications. On those conditions of use, the transmission
module needs high output power and moreover, high linearity in order to achieve the ISM standards
requirements.
1.3
Using the BFR380F in Home- or Industrial Applications
For example you can use the Infineon´s BFR380F as a Short Range Device (SRD). SRD´s are
required for applications over short distances where low power transmission of informations is
needed. Two large areas of application of SRD´s using IMD-Bands are the fields of Home-and
Industrial-solutions for example. So there are many applications in those fields. You could have a look
for some applications for Home-Solutions in Figure 1 and for Industrial-Solutions in Table 3.
In summary, SRD´s are made specifially for wireless or radio applications with limited ranges. Often in
such cases you have small data transmissions with confirming the relevant specification to supply low
cost but effective solutions transferring the informations which are necessary. Normal standards like
802.11 or 802.15 and other specifications are ideal for many applications, but SRD´s are using
proprietary radio designs which are without the overheads of the protocol stack. So if you work with
SRD´s you don’t need to test the conformance in such a high level like Zigbee or Bluetooth.
Correspondingly, developments with SRD´s may be a better solution of many applications of radio
frequency.
Application Note AN196, Rev1.1
6 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Introduction
Figure 1
Table 3
-
Applications for Home–Solutions (Home Comfort, Control and Security)
Applications for Industrial-Solutions ( Industrial automation)
manufacturing production processes
oil and gas production
electric power generation and distribution
water and wastewater treatment
This documentation presents the BFR380F performances in a driver configuration for 434
MHz applications (Figure 2). This structure can also be used for ISM-band 868 MHz
applications.
Application Note AN196, Rev1.1
7 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Introduction
Figure 2
Schematic for Home Control application at 434 MHz application (operator side)
This documentation presents BFR380F’s performance in a driver configuration for 434 MHz ISMBand applications (please refer to the Table 5 for results). The application circuit of the driver
BFR380F for using the 434 MHz ISM-Band is defined on the Figure 3.
The circuit provides a Gain of about 23.2 dB at 434 MHz. The output 1dB compression point is
located at 16.4 dBm (using a power sweep from -30 dBm to 0 dBm at input). The measurements are
made in reference to input and output of the amplifier (filter and cable losses substracted).
The input and output are matched to 50 Ω and present an input return loss of about 10 dB and an
output return loss of nearly 30 dB. The device BFR380F is unconditionally stable from DC to 10 GHz.
Concerning the small signal linearity, the output 3rd order intercept point of the application reaches
21.7 dBm (using two tones spaced 1 MHz at 434 MHz).
Application Note AN196, Rev1.1
8 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Introduction
2. Application Information
1.4
Schematics
Figure 3
Table 4
Schematics of the application circuit
Bill-of-Materials
Symbol
Value
Unit
Size
C1
69
pF
0402
Various
Input Matching/DC Block
C2
100
nF
0402
Various
RF signal to ground
C3
100
nF
0402
Various
RF signal to ground
C4
6
nF
0402
Various
Output Matching/ DC Block
L1
6.2
nH
0402
Murata LQG series
Input Matching/DC Block
L2
12
nH
0402
Murata LQG series
Output Matching/DC Block
R1
5.1
kΩ
0402
Various
Base current settings
R2
2.2
Ω
0402
Various
Stability
Q
BFR380F
Application Note AN196, Rev1.1
TSFP-3
Manufacturer
Comment
Infineon Technologies SiGe C: bipolar transistor
9 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Typical Measurement Results
2
Typical Measurement Results
Table 5
Summary of Measurement results (at room temperature)
Vcc=3V, Ic=56mA, freq=434MHz
Parameter
Symbol
Value
Unit
Frequency Range
Freq
434
MHz
DC Voltage
Vcc
3
V
DC Current
Icc
56
mA
Gain
G
23.2
dB
Input P1dB
IP1dB
5.8
dBm
Output P1dB
OP1dB
16.4
dBm
Input Return Loss
RLin
9.5
dB
Output Return Loss
RLout
21.8
dB
Reverse Isolation
IRev
29
dB
Input IP3
IIP3
1.5
dBm
Output IP3
OIP3
21.7
dBm
Noise Figure
NF
3.3
dB
Stability
k
>1.1
--
Comment/Test Condition
Input Power sweep from Pin=-30…0 dBm
Input Power Pin=-30 dBm
Pin=-30 dBm, f1=433.5 MHz, f2=434.5 MHz
Unconditionnally stable from 0 to 10 GHz
Note: the measurements showed in Table 3 are including the PCB and SMA losses of 0.1dB.
Application Note AN196, Rev1.1
10 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Measured Graphs
3
Measured Graphs
Insertion Power Gain
30
434 MHz
23.21 dB
20
10
0
0
1000
2000
3000
Frequency (MHz)
4000
5000
Figure 4
Insertion power gain of the BFR380F driver for 434 MHz application
Figure 5
Input 1dB Compression point of the BFR380F driver for 434 MHz application
Application Note AN196, Rev1.1
11 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Measured Graphs
Input Matching
0
-5
434 MHz
-9.771 dB
-10
-15
100
Figure 6
600
1100
1600
2100 2600 3100
Frequency (MHz)
3600
4100
4600 5000
Input matching of the BFR380F driver for 434 MHz application
Output Matching
0
-5
-10
-15
434 MHz
-22.25 dB
-20
-25
-30
0
Figure 7
500
1000
1500
2000 2500 3000
Frequency (MHz)
3500
4000
4500
5000
Output matching of the BFR380F driver for 434 MHz application
Application Note AN196, Rev1.1
12 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Measured Graphs
Reverse Isolation
0
-10
-20
434 MHz
-29.01 dB
-30
-40
-50
0
500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
Frequency (MHz)
Figure 8
Reverse isolation of the BFR380F driver for 434 MHz application
Figure 9
Stability K-factor of the BFR380F driver for 434 MHz application
Application Note AN196, Rev1.1
13 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Measured Graphs
Figure 10
rd
3 order intercept point of the BFR380F driver for 434 MHz application
Application Note AN196, Rev1.1
14 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Evaluation Board and layout Information
4
Evaluation Board and layout Information
Figure 11
Photo Picture of Evaluation Board
Figure 12
PCB Layer Information
Application Note AN196, Rev1.1
15 / 17
2010-09-28
BFR380F
Driver Amplifer for 434 MHz ISM-Band Applications
Authors
Authors
André Dewai, RF Engineer of Business Unit “RF and Protection Devices”
Dietmar Stolz, Staff engineer of Business Unit “RF and Protection Devices”
Application Note AN196, Rev1.1
16 / 17
2010-09-28
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AN196