RF2153
Application Schematic
US - CDMA
VCC
2nd Interstage tuning for
Bypassing for VCC
centering frequency response
10 nF
8 pF
10 nF
10 nF
15 pF
2
10 pF
15 pF
1st Interstage tuning to
match input return loss
Ground for 2nd
Harmonic Trap
TL3
16
15
14
1
2
3
4
5
13
12
11
10
9
12 nH*
1 pF
1.5 nH
15 pF
2.2**
TL2
TL1
To match input return loss
and vary gain
RF OUT
150
Ω
15 pF
4.7 pF**
Matching Network for
optimum load impedance
RF IN
L4
15 nH
6
7
8
47
Ω
27
Ω
Bypassing for
VREG1 and VREG2
15 pF
15 pF
VREG
1 k
Ω
VMODE
* High Q inductor (i.e., Coilcraft 0805HQ-series).
**High Q capacitors (i.e., Johanson C-series).
Tied together for optimum linearity
Transmission
Line Length
TL1
20 mils
TL2
100 mils
TL3
CDMA (US)
20 mils
Rev A18 001114
2-171
RFMD [ RF MICRO DEVICES ]
