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RF5187
Rev A7 DS060630
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Evaluation Board Schematic
2140MHz Operation
Constant Bias Circuit
1
2
3
4
8
7
6
5
BIAS
CIRCUIT
PACKAGE BASE
C1
2.4 pF
J1
RF IN
P1
1
2
3
CON3
P1-1
VCC
P1-3
VPC
GND
C2
3 pF
50
Ω μstrip
VPC
C6
1000 pF
VCC
C7
1000 pF
C8
1 uF
L1
4.7 nH
C5
33 pF
C3
1.5 pF
C3
3.3 pF
50
Ω μstrip
J2
RF OUT
VCC = 5 V
f = 2140 MHz
POUT = 13 dBm
R1 R3
5.0 V
Q1
R2
Q2
To VCC pins through LPF
R4
To VPC pin through LPF
Bias Point
mA
R1
Ω
R2
Ω
R3
Ω
R4
Ω
100
120
1200
3.6
820
120
120
1200
3.0
820
150
120
1200
2.5
820
180
120
1200
2.0
820
200
120
1200
1.8
820
220
120
1200
1.7
820
240
120
1200
1.6
820
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