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RF2153
Rev A18 001114
2
Application Schematic
US - CDMA
150
Ω
1.5 nH
8 pF
10 nF
10 pF
10 nF
15 pF
15 pF
RF IN
15 pF
1 k
Ω
15 pF
Tied together for optimum linearity
L4
15 nH
1
2
3
4
5
13
12
11
10
9
678
16
14
15
VREG
VMODE
V
CC
4.7 pF**
2.2**
15 pF
RF OUT
12 nH*
15 pF
10 nF
1 pF
47
Ω
TL
1
TL
2
TL
3
CDMA (US)
Transmission
Line Length
TL
1
20 mils
100 mils
20 mils
TL
2
TL
3
* High Q inductor (i.e., Coilcraft 0805HQ-series).
**High Q capacitors (i.e., Johanson C-series).
27
Ω
1st Interstage tuning to
match input return loss
Bypassing for V
CC
2nd Interstage tuning for
centering frequency response
Ground for 2nd
Harmonic Trap
Matching Network for
optimum load impedance
Bypassing for
V
REG1 and VREG2
To match input return loss
and vary gain
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