RF2420PCBA Ver la hoja de datos (PDF) - RF Micro Devices

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RF2420PCBA

PROGRAMMABLE ATTENUATOR

RF Micro Devices 

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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