RF2119 Ver la hoja de datos (PDF) - RF Micro Devices

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RF2119

HIGH EFFICIENCY 2V POWER AMPLIFIER

RF Micro Devices 

RF2119

Preliminary

Pin Function Description

Interface Schematic

1

GND

Ground externally.

2

LMATCH Interstage tuning. This pin is internally DC blocked and will connect to a

shunt inductor or microstrip line used for interstage tuning. Length from

pin to via should be approximately 60mils for 915MHz and 75mils for

902MHz and 120mils for 836MHz. The lumped element equivalent is

1.2nH to 2.0nH to ground, depending on frequency band of interest.

2

3

GND

Ground externally.

4

VCC1

Power supply for stage 1. VCC should be fed through a 3.9nH inductor

with a decoupling capacitor on the VCC side.

5

GND1

Ground for stage 1. Keep traces physically short and connect immedi-

ately to ground plane for best performance.

6

RF IN

RF input. An external DC blocking capacitor is required if this port is

connected to a DC path to ground or a DC voltage.

7

GND

Ground externally.

8

BIAS1

Ground return for the first stage bias. This pin should be connected to a

33nH inductor to ground.

9

VPC

Power control voltage. For maximum power, this voltage should be at

least 2.2V. To turn off, this voltage should be less than 0.6V. This pin

should be bypassed as close to the pin as practical.

10

NC

No connection.

11

NC

No connection.

12

RF OUT RF output and power supply for the output stage. The bias for the out-

put stage is provided through this pin and pin 13. An external matching

network is required to provide the optimum load impedance; see the

application schematics for details.

13

RF OUT Same as pin 12.

14

RF OUT Same as pin 12.

15

NC

No connection.

16

BIAS2

Ground return for the second stage bias. This pin should be connected

to a 33nH inductor to ground.

Pkg

Base

GND

Ground connection. The backside of the package should be soldered to

a top side ground pad which is connected to the ground plane with mul-

tiple vias. The pad should have a short thermal path to the ground

plane.

2-58

Rev A8 010720

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