9-11
RF2420
Rev A6 010720
9
Pin
Function
Description
Interface Schematic
1RF 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.
2VDD
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 0.5
Ω.
The DC source to the pin may be a logic driver gate to implement a
Power Down function.
3VDD
Same as pin 2.
4VDD
Same as pin 2.
5VDD
Same as pin 2.
6VDD
Same as pin 2.
7VDD
Same as pin 2.
8VDD
Same as pin 2.
9RF OUT
RF Output. Same as pin 1. Pin 1 and 9 are interchangeable.
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
off.
11
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
off.
Same as pin 10.
12
GND
Ground.
13
GND
Ground.
14
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.
15
G4
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.
Same as pin 10.
16
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.
Same as pin 10.
RF IN
RF OUT
Gxx
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