RF5388 Datasheet, PDF (9/14 Pages) RF Micro Devices – 3.3V, DUAL-BAND FRONT-END MODULE

Preliminary
RF5388
RX_a
50 Ω μstrip
LNA_A
C3
1 nF
PA EN_g
TX_g
R2
12 Ω
C6
18 pF
50 Ω μstrip
TX_a
50 Ω μstrip
PA EN_a
R5
12 Ω
C13
18 pF
C16
4.7 pF
C20
1 nF
C25
4.7 μF
VCC
Application Schematic
50 Ω μstrip
50 Ω μstrip
C1
10 pF
40 39 38 37 36 35 34 33 32 31
1
30
2
29
3
28
C2
N/U
R1
1 kΩ
C4
5.6 pF
50 Ω μstrip
C5
10 pF
50 Ω μstrip
RX_g
SW2
ANT
4
27
SW1
5
26
C7
0.5 pF
R3
1 kΩ
6
25
7
24
8
23
9
22
10
21
11 12 13 14 15 16 17 18 19 20
C26
1 nF
C27
8.2 pF
L1
5.6 nH
C22
1 uF
R6
56 Ω
C17
1 nF
C18
1 uF
R4
1 kΩ
C21
8.2 pF
C14
18 pF
C19
18 pF
C9
1 nF
L3
0Ω
C11
N/U
VCC
PDG
PDA
L2
5.6 nH
R7
6.8 Ω
C24
1 nF
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.
Rev A1 DS071026
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
9 of 14