RF3198 데이터 시트보기 (PDF) - RF Micro Devices
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RF3198 Datasheet PDF : 16 Pages
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RF3198
Pin Function Description
Interface Schematic
31
DCS OUT RF output for the DCS band. This is a 50Ω output. The output matching cir- See pin 6.
cuit 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 the See pin 2.
power control function for the module. This node must be connected 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 voltage is
applied internal to the package. This pin should be externally decoupled.
VCC1
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 BANDSEL
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 simple RC filter may be required depending 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 foot-
print.
See pin 39.
See pin 37.
6 of 16
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A0 DS070801
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