JOHANSON 0433BM15A0001E

Design Note DN025
Johanson Technology Matched Balun Filters for CC110x & CC111x
By Richard Wallace
Keywords
 Single Component Matched Balun
Filter (433 MHz or 868 MHz or 915
MHz)
 Matched Balun Filter with external LC
filter (868 MHz and 915 MHz)
 Optimized for compact designs
 433, 868 and 915 MHz ISM Bands
1





CC1100
CC1101
CC1110
CC1111
CC1150
Introduction
With the Johanson Technology (JTI)
matched balun filter component; the
component count is significantly reduced
whilst still obtaining the high radio
performance desired.
This document describes the JTI matched
chip balun filters that have been
specifically designed for the CC110x and
CC111x family of ICs operating in the 433,
868 and 915 MHz ISM bands.
The existing matched filter balun
component from JTI required a single-pole
external LC filter and a DC blocking
capacitor; part number: 0896BM15A0001
[4]. This part is targeted towards a design
that has to be compliant at 868 MHz and
915 MHz with the external LC filter and
DC blocking cap (three external 0402
components required).
With the new balun component family,
only one component is required to achieve
compliancy at 433 MHz [6.2] or 868 MHz
[6.3] or 915 MHz [6.4]. i.e. no additional
external components are required.
It is important to note that the new
matched baluns are optimized for a single
ISM frequency band.
The three balun-filter parts are available
[4]: 433 MHz [6.2] (part number:
0433BM15A0001), 868 MHz [6.3] (part
number: 0868BM15C0001) and 915 MHz
[6.4] (part number: 0915BM15A0001). All
these parts share a common footprint.
The size for the matched balun filter
component is only 2.0 mm x 1.25 mm (EIA
0805, Metric 2012) therefore it is
recommended for compact designs.
All measurement results presented in this
document are based on measurements
performed on the CC1101 JTI EM Rev 1.0
Reference Design [6], shown in Figure 1.
If the new matched filter balun is used on
this board then the external components
are not required.
The comparison performance of the JTI
Reference Design and the Discrete
Reference Designs will be discussed in
this document.
Figure 1. CC1101 868 / 915 MHz JTI Balun EM
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Design Note DN025
Table of Contents
KEYWORDS.............................................................................................................................. 1
1
INTRODUCTION............................................................................................................. 1
2
ABBREVIATIONS........................................................................................................... 2
3
REFERENCE DESIGNS AVAILABLE ........................................................................... 3
3.1
DISCRETE REFERENCE DESIGN .................................................................................. 3
3.2
VALUELINE REFERENCE DESIGN ................................................................................ 4
3.3
JTI MATCHED FILTER BALUN REFERENCE DESIGNS .................................................... 5
3.3.1
JTI Matched Filter Balun for 868 MHz and 915 MHz (Dual Band) ................................5
3.3.1.1 Component Placement ..................................................................................................6
3.3.1.2 Layout...........................................................................................................................7
3.3.1.3 Measurement Results....................................................................................................9
3.3.1.3.1 Sensitivity ..............................................................................................................9
3.3.1.3.2 Output Power and Harmonics..............................................................................10
3.3.1.3.3 Overview of Harmonic Emission Regulatory Requirements...............................11
3.3.1.3.4 Radiated Emissions..............................................................................................12
3.3.1.4 Summary of Measurements ........................................................................................13
3.3.2
JTI Matched Filter Balun for 433 MHz or 868 MHz or 915 MHz .................................14
3.3.2.1 JTI Matched Filter Balun 433 MHz............................................................................16
3.3.2.1.1 Output Power and Harmonics..............................................................................16
3.3.2.2 JTI Matched Filter Balun 868 MHz............................................................................17
3.3.2.3 JTI Matched Filter Balun 915 MHz............................................................................18
3.3.2.3.1 Output Power and Harmonics..............................................................................18
4
CONCLUSION .............................................................................................................. 20
5
REFERENCES.............................................................................................................. 21
6
APPENDICES ............................................................................................................... 22
6.1
APPENDIX A - 0896BM15A0001 DATASHEET ........................................................... 22
6.2
APPENDIX B - 0433BM15A0001 DATASHEET ........................................................... 23
6.3
APPENDIX C - 0868BM15C0001 DATASHEET........................................................... 24
6.4
APPENDIX D - 0915BM15A0001 DATASHEET ........................................................... 25
7
GENERAL INFORMATION .......................................................................................... 26
7.1
DOCUMENT HISTORY................................................................................................ 26
2
Abbreviations
DC
EM
ETSI
FCC
FR4
ISM
JTI
LC
ML
NM
PCB
SoC
SRD
WW
Direct Current
Evaluation Module
European Telecommunications Standards Institute
Federal Communications Commission
Material type used for producing PCB
Industrial, Scientific, Medical
Johanson Technology
Inductor (L) Capacitor (C) configuration
Multi-Layer Inductor
Not Mounted
Printed Circuit Board
System on Chip
Short Range Devices
Wire-Wound Inductor
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Design Note DN025
3
Reference Designs Available
There are basically three reference designs available for CC110x, CC111x and CC11xL;
each reference design has its own particular advantage.
3.1
Discrete Reference Design
The traditional 868/915 MHz reference design for the CC110x and CC111x has been the
discrete solution [8] shown in Figure 2; 315/433 MHz reference design has been the discrete
solution [9] shown in Figure 3. This design can use either multi-layer inductors or wire-wound
inductors; when using wire-wound inductors, this is the best reference design for
performance.
Figure 2. Discrete Reference Design for the CC110x and CC111x 868/915 MHz (no
decoupling capacitors shown)
Figure 3. Discrete Reference Design for the CC110x and CC111x 315/433 MHz (no
decoupling capacitors shown)
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Design Note DN025
3.2
ValueLine Reference Design
The integrated inductor ValueLine Reference designs offer the lowest possible cost. The
schematics are similar to those shown in Figure 2 and Figure 3 with the exception that the
inductors have been integrated into the PCB. This gives a cost advantage but also means
that the reference design must be strictly followed by using the same PCB thickness
otherwise the performance will change.
The integrated inductor ValueLine reference designs have the lowest cost but are also the
largest in size.
Figure 4. Top Layer integrated inductor Valueline Reference Design for the CC110x and
CC111x 868/915 MHz
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Design Note DN025
3.3
3.3.1
JTI Matched Filter Balun Reference Designs
JTI Matched Filter Balun for 868 MHz and 915 MHz (Dual Band)
Johanson Technology has developed a solution with a chip balun that is especially matched
for the CC110x and CC111x chips. Please refer to Appendix A [6.1] for data sheet of the
matched balun filter component (the full specification is available from the Johanson
Technology web site [4]).
The JTI matched balun filter solution [6] implemented on the CC1101 868/915 MHz JTI Balun
reference design consists of the Matched Balun Filter and an external LC filter which is valid
for all CC110x and CC111x. The need of the LC filter is discussed in more detail in Section
3.3.1.3 in this document.
Figure 5. JTI Reference Design for the CC110x and CC111x 868/915 MHz (no decoupling
capacitors shown)
Referring to Figure 5, U121 is the JTI Matched Balun Filter 0896BM15A0001. Inductor L122
is 5.6 nH and capacitor C123 is 1.8 pF; these two components form the LC filter. C124 is a
DC blocking capacitor and should be NPO type to minimize losses; recommended value of
100 pF. The DC block is only needed when there is a DC path in the antenna. Recommended
part numbers from Johanson Technology for the inductor (L122) is L-07C5N6SV4 and the
capacitor (CC123) is 500R07S1R8BV4.
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Design Note DN025
3.3.1.1
Component Placement
Figure 6. Component Placement
The component placement influences the RF performance. In the event that the reference
design [6] can not be copied then it is important to position the inductor L122 so that the
coupling effects to the Matched Balun Filter U121 are minimized as much as possible.
Experiments with placing L122 in parallel to U121 showed that coupling was evident and the
Matched Balun Filter performance was not optimum. Keep the inductor L122 at 90 degrees to
the balun as shown in Figure 6 or position it on the left side of U121 to avoid coupling to pin 6
of U121.
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Design Note DN025
3.3.1.2
Layout
The layout greatly influences the RF performance. TI recommends to always copy our
reference design [6] as closely as possible.
Figure 7. Layer 1 of CC1101 JTI 868/915 MHz Reference Design Layout
The ground from the decoupling capacitors has been divided from the remaining ground on
layer1. Tests from the lab have proven that this is not necessary and the ground can be solid
as shown in Figure 8. As previously mentioned, the most important critical part of the layout is
the positioning of the inductor L122 in order to minimize the coupling effect to the Matched
Balun Filter.
In the event that the reference design [6] can not be copied then the routing from the RF pins
RF_P & RF_N must be symmetrical to the Matched Balun Filter component, U121. The
length of the tracks should be kept to a minimum and preferably the same length that is used
in the reference design [6]. If this routing is not symmetrical; then the output power will be
reduced and the harmonics will increase.
All component ground pads should have the own ground via which should be positioned as
close as possible to the ground pad. When positioning the ground vias for the component pad
grounds it is important to try to keep the return path loop to ground as little as possible in
order to prevent unnecessary radiated emissions.
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Design Note DN025
Figure 8. Alternative Grounding on Layer 1
The routing in Figure 8 is the same as Figure 7 apart from the ground fill around the balun.
Figure 9. Layer 2 of CC1101 JTI 868/915 MHz Reference Design Layout
On the second layer; it is important to have a solid ground plane underneath the RF structure
and to avoid any routing directly underneath the RF. The power routing has been routed in a
star formation and the power tracks must always be routed to the decoupling capacitor first;
then from the decoupling capacitor to the pad of the CC1101.
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Design Note DN025
3.3.1.3
Measurement Results
All results presented in this chapter are based on measurements performed with CC1101 JTI
EM Rev 1.0 Reference Design board [6]. A minimum of six units have been measured in
order to obtain an average result which is presented in this report. All measurement results
presented are the average of each batch tested from typical devices.
The output power and harmonics measurements were performed with four different power
PATABLE settings: 0xC0 and 0xC2 for 10 dBm applications and 0x8E and 0x50 for 0 dBm
applications.
Note: all values are in dBm if not otherwise stated.
SmartRF04® RF studio was used to configure the devices. The settings for the registers are
the default settings used.
3.3.1.3.1
Sensitivity
Freq. Band
868 MHz
915 MHz
Data Rate [kBaud]
1.2
38.4
250
500
1.2k
38.4
250
500
JTI with LC
−111.6
−103.6
−94.8
−87.2
−111.4
−103.2
−94.4
−87.3
Discrete ML
−111.0
−103.0
−94.0
−87.0
−111.0
−103.0
−94.0
−87.0
Table 1. Average Sensitivity Values Obtained
As can be seen from Table 1; the JTI reference design with LC has the same or better
sensitivity than the discrete solution with Multi-Layer (ML) inductors.
Freq. Band
868 MHz
915 MHz
Data Rate [kBaud]
1.2
38.4
250
500
1.2k
38.4
250
500
JTI no LC
−111.4
−103.1
−94.4
−86.5
−111.3
−102.2
−93.8
−86.2
JTI with LC
−111.6
−103.6
−94.8
−87.2
−111.4
−103.2
−94.4
−87.3
Difference
−0.2
−0.5
−0.4
−0.7
−0.1
−0.9
−0.6
−1.1
Table 2. Difference in Sensitivity Values with and without LC Filter
As can be seen from Table 1 and Table 2; the sensitivity is same or better with the LC filter.
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Design Note DN025
3.3.1.3.2
Output Power and Harmonics
868 MHz (0896BM15A0001)
JTI with LC
JTI no LC
10.8
ETSI
Limit
915 MHz (0896BM15A0001)
JTI with LC
JTI no LC
11.4
11.2
11.4
FCC
Limit
Fundamental
C0
C2
10.0
10.7
10.4
10.7
8E
1.5
1.4
0.8
0.8
50
0.3
0.3
0.0
-0.1
C0
−28.9
−25.2
−30
−28.1
−25.7
−20 dBc
C2
−34.0
−29.7
−30
−32.9
−30.1
−20 dBc
8E
−40.8
−42.0
−30
−43.1
−45.8
−41.2
50
−35.9
−33.8
−30
−37.2
−35.7
−41.2
C0
−48.3
−42.3
−30
−49.4
−40.4
−41.2
C2
−48.6
−42.7
−30
−49.9
−41.2
−41.2
8E
−55.4
−53.4
−30
−56.3
−52.8
−41.2
50
−55.1
−53.2
−30
−56.1
−53.1
−41.2
C0
−48.5
−29.6
−30
−49.9
−30.2
−41.2
C2
−51.5
−33.4
−30
−52.2
−33.7
−41.2
8E
−54.6
−40.2
−30
−53.7
−37.8
−41.2
50
−55.5
−42.5
−30
−54.8
−41.0
−41.2
C0
−52.2
−44.5
−30
−52.4
−44.4
−41.2
C2
−52.6
−44.8
−30
−52.6
−45.0
−41.2
8E
−55.1
−53.4
−30
−54.5
−53.5
−41.2
50
−55.0
−53.4
−30
−54.5
−53.7
−41.2
C0
−53.4
−43.3
−30
−52.0
−43.7
−41.2
C2
−53.5
−46.4
−30
−52.1
−46.7
−41.2
8E
−53.6
−48.3
−30
−52.2
−47.3
−41.2
50
−53.6
−51.2
−30
−52.1
−49.5
−41.2
C0
−51.9
−50.8
−30
−50.9
−50.7
−20 dBc
C2
−51.9
−50.7
−30
−50.9
−50.6
−20 dBc
8E
−51.9
−52.0
−30
−50.8
−50.9
−41.2
50
−51.9
−52.0
−30
−50.9
−51.0
−41.2
C0
−49.4
−47.6
−30
−52.6
−48.5
−41.2
C2
−49.4
−49.1
−30
−53.8
−51.5
−41.2
8E
−49.4
−48.9
−30
−54.0
−51.7
−41.2
50
−49.3
−49.5
−30
−54.6
−54.0
−41.2
nd
2
harmonic
rd
3 harmonic
th
4 harmonic
th
5 harmonic
th
6 harmonic
th
7 harmonic
th
8 harmonic
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Design Note DN025
th
9 harmonic
C0
−52.4
−52.4
−30
−52.6
−53.3
−41.2
C2
−52.4
−52.2
−30
−52.3
−53.2
−41.2
8E
−52.6
−52.5
−30
−53.5
−53.6
−41.2
50
−52.6
−52.7
−30
−53.5
−53.6
−41.2
Table 3. Output Power and Conducted Harmonic Values Obtained
All values are in dBm unless stated. The values shown in red exceed the regulatory
requirements. If the recommended values and configuration are followed as specified in
Table 5 then the regulatory requirements will be fulfilled.
Limit values shown in Table 3 are taken from the ETSI EN 300 220 regulations for 868 MHz
and FCC 15.247 for 915 MHz.
3.3.1.3.3
Overview of Harmonic Emission Regulatory Requirements
Harmonic emission will depend on ground plane geometry, encapsulation etc. Table 4 shows
the FCC- and ETSI limits. Above 1 GHz, FCC allows the radiation to be up to 20 dB above
the limits given in Table 4, if duty cycling is being used. The second harmonic would only be
an issue when qualifying under FCC part 15.249 since 15.247 only requires 20 dBc.
Harmonics
nd
3
rd
4
th
5
th
6
th
7
th
8
th
9
th
Limit
2
FCC
15.249
54
dBV/m
54
dBV/m
54
dBV/m
54
dBV/m
54
dBV/m
54
dBV/m
54
dBV/m
54
dBV/m
FCC
15.247
20
dBc
54
dBV/m
54
dBV/m
54
dBV/m
20
dBc
20
dBc
54
dBV/m
54
dBV/m
ETSI EN
300 220
−30
dBm
−30
dBm
−30
dBm
−30
dBm
−30
dBm
−30
dBm
−30
dBm
−30
dBm
Table 4. ETSI and FCC Limits for Harmonic Radiation
The programmed output power and size of the ground plane will affect the level of the
harmonics and thus determine the necessary duty cycling.
The allowed additional emission, or correction factor, is calculated based on maximum
transmission time during 100 ms. Equation 1 can be used to calculate the correction factor,
where t is equal to maximum transmission time during 100 ms. From Equation 1, it can be
calculated that a maximum transmission time of 50 ms, during 100 ms, will permit all radiation
above 1 GHz to be 6 dB above the given limits.
 t 
CF  20  log

 100ms 
Equation 1. FCC Correction Factor
Even when an averaging detector is utilised, there is still a limit on emissions measured using
a peak detector function with a limit 20 dB above the average limit.
For more information and recommendations on how to comply with the different ETSI sub
bands please see Application Note 050 [3]. Application note AN001 [10] covers the
regulations in more detail for Short Range Devices (SRD) for license free transceiver
operation.
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Design Note DN025
3.3.1.3.4
Radiated Emissions
Tests performed with the 0896BM15A0001 and an external LC filter. Figure 10, Figure 11 and
Figure 12 are from an anechoic chamber performed with the specified settings stated in the
figure text. The tests were not performed according to the ETSI or FCC regulations since this
was not possible in the lab that was used. In these tests, the detector on the spectrum
analyzer was set to max hold in order to find the worst case limits. These measurements
have to be performed on the final application board to be compliant to the ETSI and FCC
regulations so these measurements are just for pre-qualification purposes. The charts are
only showing a maximum of -10 dBm; this is due to the software used to record the graphs;
10 dBm and 0 dBm was transmitted for the tests.
The reference design boards are 2-layer, 0.8 mm thick, FR4 PCB. The radiated emission
level will be dependant on the ground plane, decoupling capacitors, power routing and
thickness of the PCB. The choice of antenna will also effect the radiated emissions.
-10
Level in dBm
-20
-40
-60
-80
-90
400M
800
1G
2G
3G
4G
5G
6
7G
Frequency in Hz
Figure 10. 10 dBm Output Power (0xC2); 868 MHz Un-modulated Static TX Carrier
Figure 11. 10 dBm Output Power (0xC0); 915 MHz Un-modulated Static TX Carrier
Figure 12. 0 dBm Output Power (0xC0); 915 MHz Un-modulated Static TX Carrier
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Design Note DN025
As can be seen in Figure 11; there are some higher order harmonics that exceed the FCC
limit of -41.2 dBm. If this was the case in the application; then equation 1 could be used to
correlate the level by not continuously transmitting.
In theory, performing the test with a 4-layer FR4 PCB with a ground plane on layer 2, will give
a better performance since the pre-preg is typically 80-100 um thick and this will give a better
grounding and amount of radiated energy will be less compared to a similar design on a 2layer. Even when several pre-preg layers will be used between layer 1 and layer 2 on a 4layer FR4 PCB; the thickness will generally be less than 0.8 mm, so the radiated performance
will be better.
3.3.1.4
Summary of Measurements
Use of an LC filter does not affect the sensitivity or the output power measurements
significantly. For the total link budget, there is an advantage using the LC filter for the
sensitivity and a slight power loss for the output power. Therefore, the total effect of the LC
filter on the system performance will be the same. However, the main benefits of the LC filter
are the suppression of the harmonics.
When deciding which configuration should be used, the following should be considered:
There are mainly two power applications categories with 10 dBm and 0 dBm; there are FCC
and ETSI regulatory requirements; and also if conducted emissions will also be tested in the
final application (i.e. no internal antenna available, only RF connector). The level of the output
power setting will also affect the levels of the harmonics as can be seen in Table 3.
Refer to Table 5, to summarize all the previous mentioned application variables to obtain the
recommended application settings. The recommended power setting is also included in Table
5.
ETSI Internal Antenna
ETSI (RF Connector)
10 dBm
JTI with LC
0xC0: 10.8 dBm
JTI with LC
0xC2:10 dBm
0 dBm
JTI no LC
0x50: 0.3 dBm
JTI no LC
0x50: 0.3 dBm
FCC Internal Antenna
FCC (RF Connector)
10 dBm
JTI with LC
0xC0: 11.2 dBm (1)
JTI with LC
0xC0: 11.2 dBm
0 dBm
JTI with LC
0x8E: 0.8 dBm
JTI with LC
0x8E: 0.8 dBm
Table 5. Recommended Output Power Settings and Application Configuration
For example; a customer with PCB size restrictions has an integrated antenna [7], 0 dBm
output power; targeting only the ETSI market. With reference to Table 5; the LC filter will not
be required for regulatory issues and with a power setting of 0x50, the expected power
should be around 0.3 dBm.
Good practice would be to incorporate the LC filter into the first prototype. The filter can
always be removed by using a 100 pF capacitor or 0 ohm resistor instead of using the 5.6 nH
inductor and leaving the 1.8 pF capacitor un-mounted.
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Design Note DN025
3.3.2
JTI Matched Filter Balun for 433 MHz or 868 MHz or 915 MHz
Figure 13. JTI Reference Design for 433 MHz or 868 MHz or 915 MHz (no decoupling
capacitors shown)
Figure 14. Component Placement Recommendations
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Design Note DN025
Figure 15. Top Layer Routing Recommendations
Refer to Figure 9, for the bottom layer layout recommendations. On the second layer; it is
important to have a solid ground plane underneath the RF structure and to avoid any routing
directly underneath the RF. The power routing has been routed in a star formation and the
power tracks must always be routed to the decoupling capacitor first; then from the
decoupling capacitor to the pad of the CC1101.
Figure 16. Top Layer for Ultimate Compact Solutions, 4-layer design
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Design Note DN025
Figure 17. Effective PCB Size Comparisons between for JTI Ultimate Compact Solution
and Integrated Inductor Valueline Design
Referring to Figure 17, the JTI design on the left side is 8.6 mm x 8.6 mm ~74 mm2; the
ValueLine design is 9.7 mm x 21.7 mm ~210 mm2. The discrete design size is 9.7 mm x 16.1
mm ~156 mm2.
3.3.2.1
JTI Matched Filter Balun 433 MHz
3.3.2.1.1
Output Power and Harmonics
Solution
Discrete (ML)
JTI
Limits
433
MHz
8.4
8.2
10
866
MHz
-46
-47
-36
1299
MHz
-51
-49
-30
1732
MHz
-62
-54
-30
2165
MHz
-62
-49
-30
2598
MHz
-64
-44
-30
3031
MHz
-57
-37
-30
3464
MHz
-63
-38
-30
All values are in dBm.
Similar performance as multi-layer discrete solution. Lower 8th & 9th harmonic attenuation
but still good enough margins
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Design Note DN025
3.3.2.2
JTI Matched Filter Balun 868 MHz
Power
Setting
868 MHz
C0
8E
1736 MHz
C0
8E
2604 MHz
C0
8E
3472 MHz
C0
8E
4340 MHz
C0
8E
5208 MHz
C0
8E
6076 MHz
C0
8E
6944 MHz
C0
8E
7812 MHz
C0
8E
fc-169 (C0)
0868BM15C0001
0896BM15A0001
with LC + C
ETSI
Limit
9.4
-1
10.8
1.5
-35
-50.8
-28.9
-40.8
-30
-30
-42
-61
-48.3
-55.4
-30
-30
-33.6
-44.1
-48.5
-54.6
-30
-30
-36
-61
-52.2
-55.1
-30
-30
-42.9
-50.5
-53.4
-53.6
-30
-30
-56
-65
-51.9
-51.9
-30
-50
-56
-49.4
-49.4
-30
-62
-65
-52.4
-52.6
-30
-30
-70
-53.5
-57
All values are in dBm unless stated. The values shown in red exceed the regulatory
requirements.
The matched balun filter (0868BM15C0001 passes all the harmonic requirements. The IL has
increased since the dual band version (0896BM15A0001) but this is understandable
considering that the attenuation is increased for the harmonics and a notch has been
included to eliminate the fundamental – 169 MHz spur.
SWRA250A
Page 17 of 26
Design Note DN025
3.3.2.3
JTI Matched Filter Balun 915 MHz
3.3.2.3.1
Output Power and Harmonics
Power
Setting
0915BM15A0001
915 MHz
0896BM15A0001
0896BM15A0001
FCC
without ext LC + C
with LC + C
Limit
C0
10.4
11.4
11.2
C3
9.3
10.7
10.4
8E
0.4
0.8
0.8
50
-
-0.1
0.0
C0
-50
-26
-28
−20 dBc
C3
-55
-30
-33
−20 dBc
8E
-52
-46
-43
-41.2
50
-
-36
-37
-41.2
C0
-54
-40
-49
-41.2
C3
-55
-41
-50
-41.2
8E
-62
-53
-56
-41.2
50
-
-53
-56
-41.2
C0
-39
-30
-50
-41.2
C3
-43
-34
-52
-41.2
8E
-49
-38
-54
-41.2
50
-
-41
-55
-41.2
C0
-47
-44
-52
-41.2
C3
-45
-45
-53
-41.2
8E
-56
-54
-55
-41.2
50
-
-54
-55
-41.2
C0
-40
-44
-52
-41.2
C3
-46
-47
-52
-41.2
8E
-50
-47
-52
-41.2
50
-
-50
-52
-41.2
C0
-54
-51
-51
−20 dBc
C3
-52
-51
-51
−20 dBc
8E
-70
-51
-51
-41.2
50
-
-51
-51
-41.2
1830 MHz
2745 MHz
3660 MHz
4575 MHz
5490 MHz
6405 MHz
SWRA250A
Page 18 of 26
Design Note DN025
0915BM15A0001
7320 MHz
0896BM15A0001
0896BM15A0001
FCC
without ext LC + C
with LC + C
Limit
C0
-47
-49
-53
-41.2
C3
-54
-52
-54
-41.2
8E
-56
-52
-54
-41.2
50
-
-54
-55
-41.2
C0
-63
-53
-53
-41.2
C3
-65
-53
-52
-41.2
8E
-73
-54
-54
-41.2
50
-
-54
-54
-41.2
746 MHz
-61
-54
-54
-57
8235 MHz
Table 6. Output Power and Conducted Harmonic Values Obtained
All values are in dBm unless stated. The values shown in red exceed the regulatory
requirements. Limit values shown in Table 6. Output Power and Conducted Harmonic Values
Obtained are taken from the ETSI EN 300 220 regulations for 868 MHz and FCC 15.247 for
915 MHz.

For 0dBm and <10 dBm applications, the conducted harmonic attenuation is good for
FCC and ETSI applications.

For 10dBm+ applications, the conducted harmonic attenuation is borderline for the
4th and 6th harmonics for FCC applications; since majority of application have an
integrated antenna this is not seen as an issue.

Larger insertion loss compared to previous matched balun part for 868/915 MHz; this
is acceptable since the external LC filter and DC block is now built into the new part.

The new part will be also ideal for application that require conducted measurements
since the fc-169 MHz notch has been included, exhibiting a BPF behaviour; ideal for
0 dBm and <10 dBm.
SWRA250A
Page 19 of 26
Design Note DN025
4
Conclusion
As an alternative to the traditional discrete reference designs as shown in Figure 2 and Figure
3; the JTI reference designs can match the performance of the discrete multi-layer inductor
reference design with a lower component count. The 868 / 915 MHz discrete solution has a
total of 12 components in the RF section compared to the JTI solution of 2 to 4 components
depending on the usage of the LC filter.
For compact designs; the new matched Filter baluns at 433 MHz [6.2] or 868 MHz [6.3] or
915 MHz [6.4] from Johanson is recommended. The RF section component count is reduced
to a single component.
For best performance; the discrete wire-wound inductor solution [10] is recommended and for
the lowest cost; the integrated ValueLine reference design is recommended.
For applications that require conducted emissions approval (application with an external RF
connector); the 433 MHz [6.2] or 868 MHz [6.3] or 915 MHz [6.4] matched filter baluns are
more beneficial since the notch filter has been designed into the filter. Since these baluns
incorporate the additional notch filter, extra filtering and DC blocking capacitor this has
caused a slightly higher insertion loss than the 868/915 MHz balun solution [6.1].
Table 7 summarizes the various reference designs available for CC110x and CC111x.
Integrated
Inductor
ValueLine
Performance
Typical output
Power for Maximum
Power setting
Size
RF Component
Count (no notch
filter)
RF Component
Count (with notch
filter)
Wire-wound
Discrete
JTI 868/915
MHz
JTI 433 MHz
or 868 MHz
or 915 MHz
Middle
Highest
Middle
Middle
11.0 dBm
12.0 dBm
11.0 dBm
10.5 dBm
Largest
Middle
Middle
Smallest
6
12
2 to 4
1
7
14
4 to 6
1
Table 7. Summary Overview of Reference Designs Available
SWRA250A
Page 20 of 26
Design Note DN025
5
References
[1] CC1101 Data Sheet (cc1101.pdf)
[2] AN058 Antenna Measurement with Network Analyzer (swra161.pdf)
[3] AN050 Using the CC1101 in the European 868MHz SRD Band (swra146.pdf)
[4] JTI Data Sheets
[5] Contact information: http://www.johansontechnology.com/en/contact.html
[6] CC1101 JTI Balun 868/915 MHz Ref. Design Rev1.0 (swrc112.zip)
[7] DN016 Compact 868/915 MHz Antenna Design (swra160.pdf)
[8] CC1101EM 868/915 MHz Reference Design (swrr045.zip)
[9] CC1101EM 315/433 MHz Reference Design (swrr046.zip)
[10] AN001 SRD Regulations for License Free Transceiver Operation (swra090.pdf)
[11] DN017 CC11xx 868/915 MHz RF Matching (Rev. A) (swra168.pdf)
SWRA250A
Page 21 of 26
Design Note DN025
6
Appendices
6.1
Appendix A - 0896BM15A0001 Datasheet
High Frequency Ceramic Solutions
P/N 0896BM15A0001
868/915 MHz Impedance Matched/Balun/LPF Integrated Component for T.I.
CC110X, CC111X, CC113X and CC115X, CC110L, CC113L, CC115L and CC430
Detail Specification: 09/09/2011
Page 1 of 3
General Specifications
0896BM15A0001
Part Number
180° ± 10
Phase Difference
863 - 928 MHz
Amplitude Difference
1.5 dB max.
Operating Temperature
Power Rating
Storage
Conditions
-40 to +85°C
Impedance-Matched to T.I.
CC110X, CC111X, CC113X and
Differential Balanced Impedance
CC115X, CC110L, CC113L,
CC115L and CC430 Chipsets
Insertion Loss
1.5 dB max.
Storage Period
Return Loss
9.5 dB min.
Reel quantity
Frequency (MHz)
50 Ω
Unbalanced Impedance
25 @ 1726 - 1856MHz
18 months max sealed. 1 week max after opened*
4000 pcs
*For more info go to
www.johansontechnology.co
m/silverleads
35 min.@ 3452 - 3712MHz
35 min.@ 4315 - 4640MHz
Mechanical Dimensions
In
mm
L
0.079 ± 0.004
2.00 ± 0.10
W
0.049 ± 0.004
1.25 ± 0.10
T
0.028 ± 0.004
0.70 ± 0.10
a
0.012 ± 0.004
0.30 ± 0.10
b
0.008 ± 0.004
0.20 ± 0.10
c
0.012 +.004/-.008
0.30 +0.1/-0.20
g
0.014 ± 0.004
0.35 ± 0.10
p
0.026 ± 0.002
0.65 ± 0.05
c
L
W
a
Terminal Configuration
No.
Function
1
Unbalanced Port
2
GND
3
Balanced Port
4
Balanced Port
5
GND
6
GND
p






T
g
b
Mounting Considerations
* Line width should be designed to match 50
1
Moisture Sensitivity Level
35 min.@ 2589 - 2784MHz
Attenuation (min.)
1W max.
+5 to +35°C,
Humidity 45 - 75%RH
 characteristic impedance,
depending on PCB material and thickness.
)
Mount device with colored mark facing up.
# Pin reference
0.35
Unbalanced
Solder
*
Land
Balanced
Through-hole ( 0.3)
  
0.8
  
1.0
Balanced
0.30
100pF (EIA 0402 or 0603)
Blocking Capacitor.@ 45 or
90 deg
Pin#6 connected to ground.
Units: mm
Johanson Technology, Inc. reserves the right to make design changes without notice.
All sales are subject to Johanson Technology, Inc. terms and conditions.
www.johansontechnology.com
4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821
2011 Johanson Technology, Inc. All Rights Reserved
SWRA250A
Page 22 of 26
Design Note DN025
6.2
Appendix B - 0433BM15A0001 Datasheet
High Frequency Ceramic Solutions
P/N 0433BM15A0001
433 MHz Impedance Matched/Balun/LPF Integrated Component for T.I. CC110X,
CC111X, CC113X and CC115X, CC110L, CC113L, CC115L and CC430
Detail Specification: 09/09/2011
Page 1 of 3
General Specifications
0433BM15A0001
430 - 435
50 Ω
Part Number
Frequency (MHz)
Unbalanced Impedance
Phase Difference
Impedance-Matched to T.I. CC110X,
CC111X, CC113X and CC115X, CC110L,
CC113L, CC115L and CC430 Chipsets
Balanced Impedance
Amplitude Difference
Input Power
34 min. @ 2Fo
35 min. @ 3Fo
35 min. @ 4Fo
35 min. @ 5Fo
Attenuation (dB)
1.9 dB max
9.5 dB min.
180° ± 10
1.5 dB
1W max.
4,000
-40 to +85°C
Insertion Loss
Return Loss
Reel Quanity
Operating Temperature
Storage Temperature
Range
+5 ~ +35 °C, Humidity
45~75%RH, 18 months. 1
week max after opened*
*For more info go to www.johansontechnology.com/silverleads
Bulk
Suffix = S
Eg. 0433BM15A0001S
Packaging
Style
T&R
Suffix = E
Eg. 0433BM15A0001E
P/N
Suffix Termination Style AgPt
Suffix = None Eg. 0433BM15A0001(E or S)
Evaluation Board 0433BM15A0001-EBSMA
Terminal Configuration
Function
No.
Unbalanced Port
1
Mechanical Dimensions
In
mm
L
0.079 ± 0.004
2.00 ± 0.10
W
0.049 ± 0.004
1.25 ± 0.10
T
0.028 ± 0.004
0.70 ± 0.10
a
0.012 ± 0.004
0.30 ± 0.10
b
0.008 ± 0.004
0.20 ± 0.10
c
0.012 +.004/-.008
0.30 +0.1/-0.2
g
0.014 ± 0.004
0.35 ± 0.10
p
0.026 ± 0.002
0.65 ± 0.05
W
c
L
a
p
2
GND
3
Balanced Port**
4
Balanced Port**
5
GND
6
GND






T
g
b
**Balanced ports are DC-Blocked
from pins 1-2-5-6, capacitor is
embedded. No need for external
DC-Blocking cap at GND pins or
unbalanced port.
Johanson Technology, Inc. reserves the right to make design changes without notice.
All sales are subject to Johanson Technology, Inc. terms and conditions.
www.johansontechnology.com
4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821
2011 Johanson Technology, Inc. All Rights Reserved
SWRA250A
Page 23 of 26
Design Note DN025
6.3
Appendix C - 0868BM15C0001 Datasheet
High Frequency Ceramic Solutions
868MHz Impedance Matched/Balun/BPF Integrated Component for T.I. CC110X,
CC111X, CC113X and CC115X, CC110L, CC113L, CC115L and CC430
P/N 0868BM15C0001
Detail Specification: 09/09/2011
Page 1 of 3
General Specifications
0868BM15C0001
863 - 873 (MHz)
50 Ω
Part Number
Operating Frequency
Unbalanced Impedance
Return Loss
Phase Difference
Impedance-Matched to T.I. CC110X,
CC111X, CC113X and CC115X, CC110L,
CC113L, CC115L and CC430 Chipsets
Balanced Impedance
Amplitude Difference
Input Power
10 dB min. @ 699MHz
30 dB min. @ 1736MHz
30 dB min. @ 2604MHz
35 dB min. @ 3472MHz
30 dB min. @ 4340MHz
Attenuation*
2.1 dB max.
9.5 dB min.
180° ± 15
1.5 dB max.
1W max.
4,000
-40 to +85°C
Insertion Loss
Reel Quanity
Operating Temperature
Storage Temperature
Range
* Band Pass Filtering
+5 ~ +35 °C, Humidity
45~75%RH, 18 months. 1
week max after opened**
**For more info go to www.johansontechnology.com/silverleads
Bulk
Suffix = S
Eg. 0868BM15C0001S
Packaging
Style
T&R
Suffix = E
Eg. 0868BM15C0001E
P/N
Suffix Termination Style AgPt
Suffix = None Eg. 0868BM15C0001(E or S)
Evaluation Board 0868BM15C0001-EBSMA
Terminal Configuration
Function
No.
Unbalanced Port
1
Mechanical Dimensions
In
mm
L
0.079 ± 0.004
2.00 ± 0.10
W
0.049 ± 0.004
1.25 ± 0.10
T
0.028 ± 0.004
0.70 ± 0.10
a
0.012 ± 0.004
0.30 ± 0.10
b
0.008 ± 0.004
0.20 ± 0.10
c
0.012 +.004/-.008
0.30 +0.1/-0.2
g
0.014 ± 0.004
0.35 ± 0.10
p
0.026 ± 0.002
0.65 ± 0.05
c
L
W
a
p
2
GND
3
Balanced Port***
4
Balanced Port***
5
GND
6
GND






T
g
b
***Balanced ports are DC-Blocked
from pins 1-2-5-6, capacitor is
embedded. No need for external
DC-Blocking cap at GND pins or
unbalanced port.
Johanson Technology, Inc. reserves the right to make design changes without notice.
All sales are subject to Johanson Technology, Inc. terms and conditions.
www.johansontechnology.com
4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821
2011 Johanson Technology, Inc. All Rights Reserved
SWRA250A
Page 24 of 26
Design Note DN025
6.4
Appendix D - 0915BM15A0001 Datasheet
High Frequency Ceramic Solutions
P/N 0915BM15A0001
915MHz Impedance Matched/Balun/BPF Integrated Component for T.I. CC110X,
CC111X, CC113X and CC115X, CC110L, CC113L, CC115L and CC430
Detail Specification: 09/09/2011
Page 1 of 3
General Specifications
0915BM15A0001
902 - 928
50 Ω
Part Number
Frequency (MHz)
Unbalanced Impedance
Return Loss
Phase Difference
Impedance-Matched to T.I. CC110X,
CC111X, CC113X and CC115X, CC110L,
CC113L, CC115L and CC430 Chipsets
Balanced Impedance
Amplitude Difference
Input Power
5 min. @ 745MHz
30 min. @ 1830MHz
40 min. @ 2745MHz
45 min. @ 3660MHz
Attenuation*
2.0 dB max
9.5 dB min.
180° ± 15
1.5 dB
1W max.
4,000
-40 to +85°C
Insertion Loss
Reel Quanity
Operating Temperature
Storage Temperature
Range
* Band Pass Filtering
+5 ~ +35 °C, Humidity
45~75%RH, 18 months. 1
week max after opened**
**For more info go to www.johansontechnology.com/silverleads
Bulk
Suffix = S
Eg. 0915BM15A0001S
Packaging
Style
T&R
Suffix = E
Eg. 0915BM15A0001E
P/N
Suffix Termination Style AgPt
Suffix = None Eg. 0915BM15A0001(E or S)
Evaluation Board 0915BM15A0001-EBSMA
Terminal Configuration
Function
No.
Unbalanced Port
1
Mechanical Dimensions
2
GND
In
mm
3
Balanced Port***
L
0.079 ± 0.004
2.00 ± 0.10
4
Balanced Port***
W
0.049 ± 0.004
1.25 ± 0.10
5
GND
T
0.028 ± 0.004
0.70 ± 0.10
6
GND
a
0.012 ± 0.004
0.30 ± 0.10
b
0.008 ± 0.004
0.20 ± 0.10
c
0.012 +.004/-.008
0.30 +0.1/-0.2
g
0.014 ± 0.004
0.35 ± 0.10
p
0.026 ± 0.002
0.65 ± 0.05
W
c
L
a
p






T
g
b
***Balanced ports are DC-Blocked
from pins 1-2-5-6, capacitor is
embedded. No need for external
DC-Blocking cap at GND pins or
unbalanced port.
Johanson Technology, Inc. reserves the right to make design changes without notice.
All sales are subject to Johanson Technology, Inc. terms and conditions.
www.johansontechnology.com
4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821
2011 Johanson Technology, Inc. All Rights Reserved
SWRA250A
Page 25 of 26
Design Note DN025
7
7.1
General Information
Document History
Revision
Date
Description/Changes
SWRA250A
2011.10.12
Updated to include single frequency matched balun filters.
SWRA250
2009.01.14
Initial release.
SWRA250A
Page 26 of 26
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