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3-117
RF3806
Rev A3 DS070509
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Application Schematic - DCS/PHS/PCS
1800MHz to 2025MHz
Low Power Linear Operation
This schematic for low power linear operation:
21dBm<POUT<27dBm, 5V<VCC<8V. Bias R seen above for 8V and 60mA IREF. See biasing table for setting resistance at
other supply voltages.
Application Schematic - DCS/PCS
1800MHz to 1990MHz
High Power Operation
This schematic for high power operation:
POUT>27dBm, 5V<VCC<8V. Bias R seen above for 8V and 41mA IREF. See biasing table for setting resistance at other supply
voltages.
5.6 pF
270
Ω
270
Ω
1
2
3
4
8
7
6
5
Bias
Circuit
270
Ω
270
Ω
VREF
*
Open
10 pF
Open
VBIAS
1000 pF
10 pF
0.1
μF
10
μF
+
24 nH
10 pF
0.1
μF
10
μF
+
0
Ω
VCC
6.8 nH
1000 pF
10
μF
+
0.1
μF
1000 pF
10 pF
RF IN
* PHS/PCS: 1.8 pF
DCS: 2.4 pF
Open
L2
24 nH
Open
Open
1000 pF
10 pF
0.1
μF
10 pF
1000 pF
0.1
μF
+
10
μF
+
10
μF
Open
7.5 pF
Open
RF OUT
3.3 pF
Open
5.6 pF
Open
C30
5.1 pF
R7
430
Ω
R8
430
Ω
1
2
3
4
8
7
6
5
Bias
Circuit
R4
390
Ω
R5
390
Ω
VREF
C20
1.5 pF
C19
Open
C28
5.1 pF
C18
Open
VBIAS
C44
1000 pF
C49
10 pF
C48
0.1
μF
C45
10
μF
+
L4
24 nH
C35
10 pF
C33
0.1
μF
C34
10
μF
+
R10
0
Ω
VCC
C27
Open
C40
10
μF
+
C41
0.1
μF
C39
1000 pF
C38
10 pF
RF IN
C9
Open
L2
24 nH
C10
Open
C18
Open
C5
1000 pF
C7
10 pF
C11
0.1
μF
C48
10 pF
C40
1000 pF
C51
0.1
μF
+
C50
10
μF
+
C8
10
μF
C13
6.8 pF
C15
0.5 pF
RF OUT
C29
2.4 pF
C12
Open
C14
2.7 pF
C8
1 pF
50
Ωμstrip
50
Ωμstrip
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