RF2420
Pin
1
Function Description
Interface Schematic
RF Input. This pin is not DC-blocked, and an external blocking capaci-
RF IN
tor is required. The value depends on the frequency used. The DC
value on this pin is approximately equal to VDD.
RF IN
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.
2
VDD
Same as pin 2.
3
4
5
6
7
8
9
VDD
VDD
VDD
VDD
VDD
Same as pin 2.
Same as pin 2.
Same as pin 2.
Same as pin 2.
Same as pin 2.
VDD
RF OUT
RF Output. Same as pin 1. Pin 1 and 9 are interchangeable.
RF OUT
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
off.
10
11
G20
G10
9
Gxx
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.
Ground.
Ground.
12
13
14
GND
GND
G8
Control pin for the 8dB attenuator. This pin has an internal pull-down
resistor, so when the pin is not connected the attenuator will be turned
off.
Same as pin 10.
Same as pin 10.
Same as pin 10.
Control pin for the 4dB attenuator. This pin has an internal pull-down
resistor, so when the pin is not connected the attenuator will be turned
off.
15
16
G4
G2
Control pin for the 2dB attenuator. This pin has an internal pull-down
resistor, so when the pin is not connected the attenuator will be turned
off.
Rev A6 010720
9-11
RFMD [ RF MICRO DEVICES ]
