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2-71
RF2125P
Rev A4 010720
2
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
1
2
3
4
8
7
6
5
BIAS
CIRCUIT
PACKAGE BASE
L1
33 nH
C3
See Chart
C7
1nF
C4
See Chart
C6
100 pF
C5
1
µF
C1
See Chart
P1-3
P1-1
C2
See Chart
C8
1nF
C9
100 nF
RF OUT
RF IN
J1
J2
Broadband and
Unlicensed PCS
(1910 to 1970 MHz)
Capacitors are ATC type.
The 2.7 pF capacitor is 2.4 pF in parallel with 0.3 pF.
DCS1800
(1710 to 1785 MHz)
Broadband and
Unlicensed PCS
(1850 to 1910 MHz)
DECT
(1880 to 1990 MHz)
APPLICATION
C1 (pF)
C4 (pF)
C3 (pF)
C2 (pF)
3.3
7.5
3.6
3.9
3.0
3.9
2.7
3.6
3.6
4.3
2.4
3.9
3.0
3.9
2.7
3.6
P1-1
P1-3
P1
PC
GND
VCC
1
2
3
2125402 Rev -
50
Ω
50
Ω
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