Optional Lc Filter - Texas Instruments Chipcon Products CC1000-RTB1 Manual

25. Optional LC Filter

An optional LC filter may be added
between the antenna and the matching
network in certain applications. The filter
will reduce the emission of harmonics and
increase the receiver selectivity.
Item 315 MHz
C71 30 pF
C72 30 pF
L71 15 nH
L71 L71
C71 C71
Figure 25. LC filter
433 MHz
20 pF
20 pF
12 nH
Table 13. LC filter component values
SWRS048A
The filter topology is shown in Figure 25.
Component values are given in Table 13.
The filter is designed
terminations. The component values may
have to be tuned to compensate for layout
parasitics.
C72 C72
868 MHz
10 pF
10 pF
5.6 nH
CC1000
Ω
for 50
915 MHz
10 pF
10 pF
4.7 nH
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