9 / 14 page
9 of 14
RF5388
Preliminary
Rev A1 DS071026
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Application Schematic
LNA_A
C6
18 pF
PA EN_g
C13
18 pF
C16
4.7 pF
C21
8.2 pF
C1
10 pF
SW2
C4
5.6 pF
C26
1 nF
VCC
C7
0.5 pF
SW1
C5
10 pF
C20
1 nF
VCC
C17
1 nF
C18
1 uF
L2
5.6 nH
PA EN_a
L3
0
Ω
C24
1 nF
R7
6.8
Ω
L1
5.6 nH
C22
1 uF
R6
56
Ω
C25
4.7
μF
PDG
C14
18 pF
PDA
C19
18 pF
C3
1 nF
RX_a
TX_g
TX_a
ANT
RX_g
C27
8.2 pF
1
3
4
5
6
7
19
18
11
15
20
12
13
16
17
14
8
9
2
10
22
21
23
25
24
26
28
27
29
30
32
33
40
36
31
39
38
35
34
37
NOTES:
Low Band Recommendations
1. In general, it is recommended to follow the Evaluation Board layout
rules and component placements.
2. C26 needs to be placed as close as possible to Pins 25 and 26 for
best linearity.
3. C27 placement is critical to provide 2
nd harmonic filtering (please
see Evaluation Board layout).
4. C16 placement should be as close as possible to Pin 14.
High Band
1. C18 should be placed close to Pin 17 for best linearity.
2. Depending on the layout, R7, R6, and R5 values can be changed to
optimize performance.
3. The value and placements of C7 and C4 can be optimized based on
the layout for best performance.
50
Ω μstrip
50
Ω μstrip
50
Ω μstrip
50
Ω μstrip
50
Ω μstrip
50
Ω μstrip
R2
12
Ω
R5
12
Ω
R4
1 k
Ω
C9
1 nF
C11
N/U
R3
1 k
Ω
C2
N/U
R1
1 k
Ω
50
Ω μstrip
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
