SWRS037B – JANUARY 2006 – REVISED MARCH 2015
Table 6-2. Bill of Materials for the Application Circuit
(1)
COMPONENT
VALUE @ 31 5MHz
VALUE @ 433 MHz
VALUE @ 868/915 MHz
C41
100 nF ± 10%, 0402 X5R
C51
27 pF ± 5%, 0402 NP0
C71
27 pF ± 5%, 0402 NP0
C101
6.8 pF ± 0.5 pF, 0402 NP0
3.9 pF ± 0.25 pF, 0402 NP0
1.0 pF ± 0.25 pF, 0402 NP0
C102
12 pF ± 5%, 0402 NP0
8.2 pF ± 0.5 pF, 0402 NP0
1.5 pF ± 0.25 pF, 0402 NP0
C103
6.8 pF ± 0.5 pF, 0402 NP0
5.6 pF ± 0.5pF, 0402 NP0
3.3 pF ± 0.25 pF, 0402 NP0
C104
220 pF ± 5%, 0402 NP0
220 pF ± 5%, 0402 NP0
100 pF ± 5%, 0402 NP0
100 pF ± 5%, 0402 NP0
C105
220 pF ± 5%, 0402 NP0
220 pF ± 5%, 0402 NP0
(12 pF ± 5%, 0402 NP0 if optionally
699 MHz filter is desired)
(47 pF ± 5%, 0402 NP0 if optionally
C106
699 MHz filter is desired)
C111
6.8 pF ± 0.5 pF, 0402 NP0
3.9 pF ± 0.25 pF, 0402 NP0
1.5 pF ± 0.25pF, 0402 NP0
L101
33 nH ± 5%, 0402 monolithic
27 nH ± 5%, 0402 monolithic
12 nH ± 5%, 0402 monolithic
L102
18 nH ± 5%, 0402 monolithic
22 nH ± 5%, 0402 monolithic
18 nH ± 5%, 0402 monolithic
L103
33 nH ± 5%, 0402 monolithic
27 nH ± 5%, 0402 monolithic
12 nH ± 5%, 0402 monolithic
(12 nH ± 5%, 0402 monolithic if
L104
optionally 699 MHz filter is desired)
L105
3.3 nH ± 5%, 0402 monolithic
L111
33 nH ± 5%, 0402 monolithic
27 nH ± 5%, 0402 monolithic
12 nH ± 5%, 0402 monolithic
L112
18 nH ± 5%, 0402 monolithic
R141
56 k
Ω
±1%, 0402
XTAL
26.0 MHz surface mount crystal
(1)
Murata LQG15HS and GRM1555C series inductors and capacitors, resistor from the Koa RK73 series, and AT-41CD2 crystal from NDK
6.2
Design Requirements
6.2.1
Bias Resistor
The bias resistor R141 is used to set an accurate bias current.
6.2.2
Balun and RF Matching
The components between the RF_N/RF_P pins and the point where the two signals are joined together
[(C111, C101, L101 and L111 for the 315/433 MHz design) and (L101, L111, C101, L102, C111, C102
and L112 for the 868/915 MHz reference design)] form a balun that converts the differential RF signal on
CC1150 to a single-ended RF signal. C104 is needed for dc blocking. Together with an appropriate LC
filter network, the balun components also transform the impedance to match a 50-
Ω
antenna (or cable).
C105 provides dc blocking and is only needed if there is a dc path in the antenna. For the 868/915 MHz
reference design, this component may also be used for additional filtering, see
.
Suggested values for 315 MHz, 433 MHz, and 868/915 MHz are listed in
.
The balun and LC filter component values and their placement are important to achieve optimal
performance. It is highly recommended to follow the CC1150EM reference design (see
and
). Gerber
files and schematics for the reference designs are available for download from
and
Copyright © 2006–2015, Texas Instruments Incorporated
Applications, Implementation, and Layout
53
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Summary of Contents for CC1150
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