RF2421PCBA 데이터 시트보기 (PDF) - RF Micro Devices
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RF2421PCBA Datasheet PDF : 4 Pages
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RF2421
Pin Function Description
Interface Schematic
1
NC
Not internally connected. This pin can be grounded.
2
RF IN
RF Input. This pin is not DC blocked, and an external blocking capacitor
is recommended. The value depends on the frequency used.
RF IN
RF OUT
3
GND
Ground connection. Keep trace physically short and connect immedi-
ately to the ground plane for best performance.
4
RF OUT RF Output. This pin is not DC blocked, and an external blocking capac- See pin 2.
itor is recommended. The value depends on the frequency used.
5
NC
Not internally connected. This pin can be grounded.
6
VDD
Power supply pin. An external RF bypass capacitor is recommended.
7
G10
Control pin for the 10dB attenuator. This pin has an internal pull-down
resistor, so when the pin is not connected the attenuator will be turned
G10
off.
8
NC
Not internally connected. This pin can be grounded.
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
9
P1-1
P1-3
P1
1 VDD
2 GND
3 ATTN
2421400 Rev A
C3
1
RF IN
J1
50 Ω µstrip 100 pF
2
C4
3
RF OUT
J2
50 Ω µstrip 100 pF
4
8
7
P1-3
6
P1-1
C1
C2
5
100 pF 100 nF
Rev A6 001102
9-17
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