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ADF7030-1 bảng dữ liệu(PDF) 10 Page - Analog Devices

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UG-957
ADF7030-1 Hardware Reference Manual
Rev. 0 | Page 10 of 15
RF MATCHING NETWORKS
The purpose of the matching networks is to maximize power
transfer from the relevant PA to the antenna, from the antenna
to the LNA, and to minimize reflections due to impedance
mismatch. With separate matches, each PA or LNA has an
individual matching network to a switch or antenna.
PA1 SEPARATE MATCHING NETWORK
Figure 7. 862 MHz to 928 MHz Harmonic Filter and Matching
Network for PA1
Figure 8. 433 MHz to 470 MHz Harmonic Filter and Matching
Network for PA1
Figure 9. 169 MHz Harmonic Filter and Matching Network for PA1
A shunt capacitor and two series inductors match consisting
of L14, L16, and C2 is used for all PA1 matching networks.
Additionally, when operating at 169 MHz, a harmonic termination
circuit consisting of L16, C41, and R7 is required. The other
components, L11 and C20, are a choke inductor and a dc
blocking capacitor, respectively.
The PA is matched to 50 Ω and the input and output impedances
of the harmonic filter are also 50 Ω. Table 6 (LFCSP) and Table 7
(LQFP) list the matching components for PA1.
Table 6. PA1 Matching Components for 40-Lead LFCSP
Variant
Component
Value at
169 MHz
Value from
430 MHz to
470 MHz
Value from
860 MHz to
930 MHz
C15
27 pF
6.8 pF
Not applicable
C16
27 pF
6.8 pF
2.7 pF
C20
100 nF
270 pF
56 pF
C21
15 pF
6.8 pF
2.7 pF
C41
33 pF
Not applicable
Not applicable
L1
12 nH
19 nH
Not applicable
L2
47 nH
33 nH
11 nH
L3
12 nH
19 nH
11 nH
L6
82 nH
23 nH
13 nH
L11
470 nH
82 nH
40 nH
L14
82 nH
19 nH
13 nH
L16
27 nH
Not applicable
Not applicable
R7
50 Ω
Not applicable
Not applicable
Table 7. PA1 Matching Components for 48-Lead LQFP Variant
Component
Value at
169 MHz
Value from
430 MHz to
470 MHz
Value from
860 MHz to
930 MHz
C15
27 pF
6.8 pF
Not applicable
C16
27 pF
6.8 pF
2.7 pF
C20
100 nF
270 pF
56 pF
C21
15 pF
6.8 pF
3.3 pF
C41
33 pF
Not applicable
Not applicable
L1
12 nH
19 nH
Not applicable
L2
47 nH
33 nH
11 nH
L3
12 nH
19 nH
11 nH
L6
82 nH
23 nH
11 nH
L11
470 nH
82 nH
40 nH
L14
82 nH
19 nH
9 nH
L16
27 nH
Not applicable
Not applicable
R7
50 Ω
Not applicable
Not applicable
L2
L3
C20
DC
BLOCK
C16
L14
L3
L11
PA1 MATCH
HARMONIC FILTER
C21
PAOUT1
CREG3
L1
L3
L2
C20
DC
BLOCK
C16
C15
L14
L3
L11
PA1 MATCH
HARMONIC FILTER
C21
PAOUT1
CREG3
L1
L3
L2
C20
DC
BLOCK
C16
C15
L14
L3
C41
L3
R7
L11
PA1 MATCH
HARMONIC FILTER
C21
PAOUT1
CREG3


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