RF2420PCBA 데이터 시트보기 (PDF) - RF Micro Devices
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RF2420PCBA Datasheet PDF : 6 Pages
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RF2420
Pin Function Description
Interface Schematic
1
RF IN
RF Input. This pin is not DC-blocked, and an external blocking capaci-
tor is required. The value depends on the frequency used. The DC
value on this pin is approximately equal to VDD.
RF IN
2
VDD
VDD supply connection. Bypassing is critical: To achieve maximum
attenuation range the magnitude of the impedance at the operation fre-
quency, as seen from the package pins, needs to be less than 0.5Ω.
The DC source to the pin may be a logic driver gate to implement a
Power Down function.
3
VDD
Same as pin 2.
4
VDD
Same as pin 2.
5
VDD
Same as pin 2.
6
VDD
Same as pin 2.
7
VDD
Same as pin 2.
8
VDD
Same as pin 2.
9
RF OUT RF Output. Same as pin 1. Pin 1 and 9 are interchangeable.
RF OUT
10
G20
Control pin for the 20dB attenuator. This pin has an internal pull-down
resistor, so when the pin is not connected the attenuator will be turned
Gxx
9
off.
11
G10
Control pin for the 10dB attenuator. This pin has an internal pull-down Same as pin 10.
resistor, so when the pin is not connected the attenuator will be turned
off.
12
GND
Ground.
13
GND
Ground.
14
G8
Control pin for the 8dB attenuator. This pin has an internal pull-down Same as pin 10.
resistor, so when the pin is not connected the attenuator will be turned
off.
15
G4
Control pin for the 4dB attenuator. This pin has an internal pull-down Same as pin 10.
resistor, so when the pin is not connected the attenuator will be turned
off.
16
G2
Control pin for the 2dB attenuator. This pin has an internal pull-down Same as pin 10.
resistor, so when the pin is not connected the attenuator will be turned
off.
Rev A6 010720
9-11
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