RF2475 Ver la hoja de datos (PDF) - RF Micro Devices
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RF2475 Datasheet PDF : 20 Pages
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Preliminary
RF2475
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
P1-1
P1
1 VCC
2 GND
3 GND
P1-4 4 VCC
CON4
P2
1 GND
P2-2 2 GAIN SEL
P2-3 3 GAIN
CON3
NOTES:
1. For best image rejection, provide a common ground under the device connecting pins 10, 11, 26, and 27.
2. There is a single gain select pin for both frequency bands.
3. The image reject SAW filters are assumed to have a 3 dB insertion loss and 40 dB of image rejection.
4. Parts with "*" should not be populated on the evaluation board.
J1
LNA2 OUT
VCC LNA2
J9
LNA2 IN
J8
LNA1 IN
GAIN SEL
VCC LNA1
J7
LNA1 OUT
J6
MX1 IN
50 Ω µstrip
FL2*
FAR-F6CE-
1G9600-L2XB
VCC MX1
C1
1 nF
2
IN
C21*
DNI
5
OUT
R3*
DNI
R2
0Ω
L14
10 nH
L1
8.2 nH
C4
0.5 pF
R1
L2
0 Ω 18 nH
R5
300 Ω
L3
7.5 nH
C5
3 pF
C6
4 pF
C2
3 pF
28
27
26
25
24
23
22
C7
100 pF
1
C23
10 pF
2
C38
C37
50 Ω µstrip
4 pF
33 nF
3
L12
L13
3.9 nH 56 nH
4
21
20
X2
19
18
L4
4.7 nH
C36
3 pF
C8*
L5
C11
DNI
56 nH 8 pF
50 Ω µstrip
5
L12
C38
3.9 nH 33 nF
6
17
C24*
DNI
16
C22
1 nF
L6
56 nH
R6*
DNI
50 Ω µstrip
50 Ω µstrip
TRL1
7
8
9
C20
100 pF
C19
1.2 pF
L11
12 nH
10
11
C18
3 pF
R11*
DNI 2
IN
R10
0Ω
R9*
5 DNI
OUT
FL1*
R8
FAR-F5CE-
881M50-K210
0Ω
15
12
13
14
+ C14
100 pF
C13
3 pF
L15
2.7 nH
C17
3 pF
L9
39 nH
R7
510 Ω
L8
C15
1.8 nH 1.5 pF
R4
0Ω
C16
1.5 pF
2475400, Rev. -
50 Ω µstrip
50 Ω µstrip
50 Ω µstrip
C9
3 pF
C10
1 nF
L7
150 nH
50 Ω µstrip
C12
10 pF
Part of Test Board
50 Ω µstrip
J2
MX2 IN
J10
LO1 OUT
VCC LO1
J3
LO1 IN
VCC IF
J4
IF OUT
VCC DBLR
VCC LO2
J5
LO2 OUT
Part of Test Board
VCC
C25 + C26
1 uF
1 nF
JP1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
HEADER 9X2
C28
1 nF
VCC MX2
C29
1 nF
C30
1 nF
C35
1 nF
C34
1 nF
C31
1 nF
C32
1 nF
C33
1 nF
Gain
VCC LNA2
VCC MX2
VCC LO2
VCC DBLR
VCC IF
VCC MX1
VCC LO1
VCC LNA1
C27
1 nF
8
Rev A2 010918
8-97
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