RF5146_1 Datasheet, PDF (8/13 Pages) RF Micro Devices – QUAD-BAND GSM850/GSM900/DCS/PCS POWER AMP MODULE

RF5146
Pin Function Description
Interface Schematic
31
DCS/PCS ^{RF output for the DCS/PCS bands. This is a 50Ω output. The output match- See pin 6.}
OUT
ing 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
Controlled voltage input to the DCS/PCS driver stage. This voltage is part of See pin 2.
DCS/PCS
the power control function for the module. This node must be connected to
VCC OUT. This pin should be externally decoupled.
36
GND
Internally connected to the package base.
37 DCS/PCS IN ^{RF input to the DCS/PCS band. This is a 50Ω output.}
VCC1
RF IN
38
GND
Internally connected to the package base.
39
VCC1
Controlled voltage on the GSM and DCS/PCS preamplifier stages. This volt-
DCS/PCS
age is applied internal to the package. This pin should be externally decou-
pled.
VCC1
40
BAND SEL Allows external control to select the GSM or DCS/PCS bands with a logic
high or low. A logic low enables the GSM bands, whereas a logic high
BAND SEL
enables the DCS/PCS bands.
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 300kHz lowpass filter is integrated into the
CMOS. No external filtering is required. A VRAMP limiter function is also
integrated into the CMOS.
3
0
0
k
H
z
VR AM P
46
VCC1 GSM ^{Internally connected to VCC1 (pin 39). No external connection required. See pin 39.}
47
GND1 GSM ^{Ground connection for the GSM preamplifier stage. Connect to ground}
plane close to the package pin.
48
GSM850/ ^{RF input to the GSM band. This is a 50Ω input.}
See pin 37.
GSM900 IN
Pkg
Base
GND
Connect to ground plane with multiple via holes. See recommended foot-
print.
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Rev A1 DS050928