Preliminary
2-265
RF3110
Rev A0 010921
2
Pin
Function
Description
Interface Schematic
1
DCS IN
RF input to the DCS band. This is a 50
Ω input.
2BAND
SELECT
Allows external control to select the GSM or DCS band with a logic high
or low. A logic low enables the GSM band whereas a logic high enables
the DCS band.
3
TX ENABLE This signal enables the PA module for operation with a logic high. Once
TX Enable is asserted the RF output level will increase to 0dBm.
4VBATT
Power supply for the module. This should be connected to the battery.
5VREG
Regulated voltage input for power control function. (2.8V nom)
6
VRAMP
Ramping signal from DAC. A simple RC filter may need to be con-
nected between the DAC output and the VRAMP input depending on
the baseband selected. The ramping profiles shown later in the data
sheet are recommended profiles for meeting the GSM specification for
burst timing and transient spectrum.
7GSM IN
RF input to the GSM band. This is a 50
Ω input.
8VCC2
Controlled voltage input to driver stage for GSM bands. This voltage is
part of the power control function for the module. This node must be
connected to VCC out.
9GSM OUT
RF output for the GSM band. This is a 50
Ω output. The output load line
matching is contained internal to the package.
10
VCC OUT
Controlled voltage output to feed VCC2. This voltage is part of the
power control function for the module. It can not be connected to any-
thing other than VCC2, nor can any component be placed on this node
(i.e. decoupling capacitor).
11
DCS OUT
RF output for the DCS band. This is a 50
Ω output. The output load line
matching is contained internal to the package.
12
VCC2
Controlled voltage input to DCS driver stage. This voltage is part of the
power control function for the module. This node must be connected to
VCC out
Pkg
Base
GND
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