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8-110
RF2486
Rev A7 010717
8
Evaluation Board Schematic
2.4GHz, 280MHz IF
(Download Bill of Materials from www.rfmd.com.)
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2
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4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
C12
22 pF
C6
1nF
50
Ω µstrip
J1
LNA2 IN
BUFF EN
C14
1nF
C7
22 pF
R1
1k
Ω
50
Ω µstrip
J2
LO IN
C10
1nF
C5
22 pF
L1
1.8 nH
C4
2.0 pF
C1*
22 pF
C2*
22 pF
C2a
22 pF
FL1*
C1a
22 pF
50
Ωµstrip
50
Ω µstrip
J6
LNA OUT
J5
MIXER IN
C11
1.0 pF
L4
22 nH
C8
6pF
J4
IF OUT
2486401-
*Components not normally populated.
NOTES:
C11 selected to Fine Tune L4 for IF Output Match at 280 MHz.
R2 is normally not populated. For applications requiring additional LNA IP3, see the datasheet for recommended resistance values.
C1a and C2a are normally not populated. If C1a and C2a are populated, the LNA and mixer can be tested independently.
In this case, C1 and C2 should be removed.
To use the part with onboard filter, do not populate C1a, and C2a.
Use C1 and C2 instead. This will allow cascaded operation only.
VCC
VCC
Gnd
C13
1nF
C9
22 pF
V
CC
L2
470 nH
L3
470 nH
50
Ωµstrip
J3
LO OUT
C17
100 pF
L5
180 nH
C16
100 pF
50
Ωµstrip
**See Notes**
50
Ωµstrip
C3
22 pF
R2*
SAT
**See Notes**
V
CC
V
CC
T1
TOKO
GND
P1-3
VCC
P1-1
BUFFER ENABLE
P1
1
2
3
CON3
C15
4.7 uF
+
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