RF2425PCBA 데이터 시트보기 (PDF) - RF Micro Devices
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RF2425PCBA Datasheet PDF : 4 Pages
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RF2425
Pin
1
2
3
4
5
6
7
8
Function
IN1
GND
VDD
OUT2
IN2
CTRL
GND
OUT1
Description
Interface Schematic
Input pin for Channel 1. Channel 1 is chosen with a logic level “Low” on
pin 6, CTRL. The input VSWR is 1:1 when this channel is active and
highly capacitive (open circuit) when this channel is inactive. Since
both channels of the switch are bidirectional, this pin may be used as
an output with OUT1 as its input depending on layout preference.
Ground connection. Keep traces physically short and connect immedi-
ately to the ground plane for best performance.
Power supply. An external RF bypass capacitor is recommended.
Output pin for Channel 2. This pin may be used as the channel 2 input
instead; see pin 5 description.
Input pin for Channel 2. Channel 2 is chosen with a logic level “High”
on pin 6, CTRL. The input VSWR is 1:1 when this channel is active
and highly capacitive (open circuit) when this channel is inactive. Since
both channels of the switch are bidirectional, this pin may be used as
an output with OUT2 as its input depending on layout preference.
Control pin. This pin chooses which channel is active. A “Low” level
chooses Channel 1; a “High” level chooses Channel 2. CMOS logic
may be used to drive the control input.
Same as pin 2.
Output pin for Channel 1. This pin may be used as the channel 1 input
instead; see pin 1 description.
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
P1
P1-1 1 VDD
9
2 GND
P1-3 3 CTRL
C1
IN1
50 Ω µstrip
15 pF
J1
1
VDD
C5
C6
2
1 µF
15 pF
3
OUT2
50 Ω µstrip
J2
4
C2
15 pF
2425400-
C4
15 pF
50 Ω µstrip
OUT1
8
J4
7
6
CTRL
50 Ω µstrip
IN2
5
J3
C3
15 pF
Rev A1 010228
9-21
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