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Preliminary
4-123
RF2325
Rev A4 010720
4
Application Schematic
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
Pin
Function
Description
Interface Schematic
1GND
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
2GND
Same as pin 1.
3RF IN
RF input pin. This pin is not externally DC blocked and thus requires an
external blocking capacitor suitable for the frequency of operation. The
input impedance of this pin is internally matched to 50
Ω using resistive
feedback.
4GND
Same as pin 1.
5RF OUT
RF output and bias pin. The input impedance of this pin is internally
matched to 50
Ω using resistive feedback. Bias should be supplied to
this pin through an external series resistor and RF choke inductor.
Because DC biasing is present on this pin, a DC blocking capacitor
should be used in most applications (see application schematic). The
supply side of the bias network should be well-bypassed.
Seepin 3schematic.
RF OUT
RF IN
1
2
3
5
4
100 pF
100 pF
RF IN
RF OUT
220 nH
39
Ω
V
CC
1nF
1
2
3
5
4
C2
100 pF
C1
100 pF
L2
220 nH
R1
39
Ω
C5
1nF
50
Ωµstrip
50
Ωµstrip
RF OUT
J2
RF IN
J1
P1-1
P1-1
NC
P1
VCC
GND
1
2
3
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