Preliminary
2-498
RF3146
Rev A7 040812 W3
Pin
Function
Description
Interface Schematic
31
DCS/PCS
OUT
RF output for the DCS/PCS bands. This is a 50
Ω output. The output
matching circuit and DC-block are internal to the package.
See pin 6.
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/PCS
Controlled voltage input to the DCS/PCS driver stage. This voltage is
part of the power control function for the module. This node must be
connected to VCC OUT. This pin should be externally decoupled.
See pin 2.
36
NC
No internal connection. Connect to ground plane close to the package
pin.
37
DCS/PCS IN RF input to the DCS/PCS band. This is a 50Ω output.
38
NC
No internal connection. Connect to ground plane close to the package
pin.
39
VCC1
DCS/PCS
Controlled voltage on the GSM and DCS/PCS preamplifier stages. This
voltage is applied internal to the package. This pin should be externally
decoupled.
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 enables the DCS/PCS bands.
41
TX ENABLE This signal enables the PA module for operation with a logic high. Both
bands are disabled with a logic low.
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.
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/
GSM900 IN
RF input to the GSM band. This is a 50
Ω input.
See pin 37.
Pkg
Base
GND
Connect to ground plane with multiple via holes. See recommended
footprint.
VCC1
RF IN
VCC1
GSM CTRL
DCS CTRL
BAND SEL
TX EN
TX EN
VBATT
TX ON
-
+
VRAMP
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