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RF2157
Rev A19 010611
2
Evaluation Board Schematic
US - CDMA
15
16
1
2
3
4
12
11
10
9
8
7
6
5
14
13
C24
4.7 pF
C5
15 pF
RF IN
TL
4
C14 (pF)
C30 (pF)
C1 (pF)
L1 (nH)
2.2
10
4.7
12
CDMA (US)
Board
C1
4.7 pF
C14
2.2 pF
C3
15 pF
L1
12 nH
C7
1.5 pF
C4
15 pF
C28
10 nF
C2
4.7 uF
* L1 is a High Q inductor (i.e., Coilcraft 0805HQ-series).
**C1 and C14 are High Q capacitors
(i.e., Johanson C-series).
Pins 1 and 9 are internally grounded to the die flag.
TL
1
TL
2
CDMA (US)
Transmission
Line Length
TL
1
30-40 mils
150 mils
20-30 mils
TL
2
TL
3
200 mils
TL
4
C27
15 pF
R12
Jumper
P2-1
C26
1
µF
R1
1k
Ω
P2-2
L4
15 nH
C13
15 pF
R11
Jumper
C6
15 pF
P1-1
C30
9.1 pF
L2
8.2 nH
C8
10 nF
C25
1uF
TL
3
RF OUT
P1
1
2
P1-1
VCC
GND
P2
1
2
VMODE
P2-2
P2-1
VREG
2157400C
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