RF3146D Ver la hoja de datos (PDF) - RF Micro Devices

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Fabricante

RF3146D

DUAL-BAND GSM900/DCS POWER AMP MODULE

RF Micro Devices 

RF3146D

Pin Function Description

Interface Schematic

31

DCS OUT RF output for the DCS band. This is a 50Ω output. The output matching See pin 6.

circuit and DC-block are internal to the package.

32

GND

Internally connected to the package base.

33

NC

Internal circuit node. Do not externally connect.

34

GND

Internally connected to the package base.

35 VCC2 DCS Controlled voltage input to the DCS driver stage. This voltage is part of See pin 2.

the power control function for the module. This node must be con-

nected to VCC OUT. This pin should be externally decoupled.

36

NC

No internal connection. Connect to ground plane close to the package

pin.

37

DCS IN RF input to the DCS band. This is a 50Ω output.

VCC1

RF IN

38

NC

No internal connection. Connect to ground plane close to the package

pin.

39 VCC1 DCS Controlled voltage on the GSM and DCS preamplifier stages. This volt-

age is applied internal to the package. This pin should be externally

VCC1

decoupled.

40 BAND SEL Allows external control to select the GSM or DCS bands with a logic

high or low. A logic low enables the GSM bands, whereas a logic high

enables the DCS/PCS bands.

BAND SEL

TX EN

41 TX ENABLE This signal enables the PA module for operation with a logic high. Both

bands are disabled with a logic low.

TX EN

GSM CTRL

DCS CTRL

VBATT

TX ON

42

VBATT

Power supply for the module. This pin should be externally decoupled

and connected to the battery.

43

VBATT

Power supply for the module. This pin should be externally decoupled

and connected to the battery.

44

NC

Internal circuit node. Do not externally connect.

45

VRAMP Ramping signal from DAC. A simple RC filter may be required depend-

ing on the selected baseband.

VRAMP

-

+

46

47

48

Pkg

Base

VCC1 GSM

GND1 GSM

GSM850/

GSM900 IN

GND

Internally connected to VCC1 (pin 39). No external connection

required.

Ground connection for the GSM preamplifier stage. Connect to ground

plane close to the package pin.

RF input to the GSM band. This is a 50Ω input.

Connect to ground plane with multiple via holes. See recommended

footprint.

See pin 39.

See pin 37.

2-496

Rev A11 060719

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