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Preliminary
8-133
RF2488
Rev A0 010905
8
Evaluation Board Schematic
IF@135MHz
(Download Bill of Materials from www.rfmd.com.)
J4
LNA1 IN
J5
LNA2 IN
C4
100 pF
GAIN SEL
L4
12 nH
50
Ωµstrip
J8
LNA2 OUT
50
Ωµstrip
J10
MX2 IN
C16
10 pF
L12
180 nH
C17
10 pF
L16
560 nH
R10
820
Ω
C21
1nF
50
Ωµstrip
J6
IF2 OUT
C18
1nF
MX VCC
C7
100 pF
L11
180 nH
C14
10 pF
C15
10 pF
L15
560 nH
R9
820
Ω
C20
1nF
C22
8pF
L13
180 nH
C19
1nF
50
Ωµstrip
J7
IF1 OUT
C6
100 pF
Band Select
L3
2.2 nH
50
Ωµstrip
J3
LO1 IN
TX/RX
C3
100 pF
C5
100 pF
LNA1 VCC
L1
15 nH
C1
1.2 pF
50
Ωµstrip
J1
LNA1 OUT
Bias VCC
C2
100 pF
50
Ωµstrip
J2
MX1 IN
JP1
C27
1nF
C13
33 nF
C11*
DNI
2488400-
19
20
21
22
23
1
5
4
3
2
6
9
8
7
11
10
15
14
13
12
24
16
17
18
L5
2.2 nH
50
Ωµstrip
J9
LO2 IN
C24
100 pF
L10
2.2 nH
L8
56 nH
HEADER 8X2
16
13
15
14
10
12
11
7
9
8
4
6
5
1
3
2
C28
1nF
C29
1nF
C30
1nF
C31
1nF
C32
1nF
C33
1nF
C34
1nF
C35
1nF
L9*
DNI
C12
33 nF
L17
10 nH
R5
0
Ω
R6*
0
Ω
LNA2 VCC
C8
10 pF
I/O
I/O
FL2*
Saw Filter
R7*
0
Ω
IF OUT
SELECT
C9
100 pF
L7
8.2 nH
R8
0
Ω
L14
180 nH
C23
8pF
C10
5pF
L6
4.7 nH
L2
4.7 nH
R4
0
Ω
R1
0
Ω
R3*
0
Ω
R2*
0
Ω
I/O
I/O
FL1*
Saw Filter
C26
1
µF
+
P1
CON2
1
2
GND
VCC
C25
3pF (HQ)
LNA1 VCC
LNA2 VCC
MX VCC
IF Out Select
Gain Select
Bias VCC
Band Select
TX/RX
R11
10 k
Ω
R12
10 k
Ω
R13
10 k
Ω
R14
10 k
Ω
NOTE: Parts with * after reference designator should not be populated on evaluation board.
TRL
TRL
50
Ωµstrip
50
Ωµstrip
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