RF2705G
Pin
13
Function Description
Interface Schematic
Differential low band PA driver amplifier output.
RF OUT
LB N
VCC VCC
This output is intended for low band (GSM850/900) operation and
drives a differential SAW.
A bypass mode allows the low band PA driver amplifier’s input to be
switched between the signal from the modulator and the signal applied
at LOLB. This enables a GMSK-modulated signal on the LOLB input to
be switched into the RF signal path.
VCC
The output is an open collector. The outputs are matched off-chip.
RF OUT LB P
RF OUT LB N
Complementary differential low band PA driver amplifier output.
See pin 13.
See pin 13.
14
15
RF OUT
LB P
RF OUT
HB N
Differential high band PA Driver amplifier output.
VCC VCC
This output is intended for DCS1800/PCS1900 band operation.
A bypass mode allows the high band PA driver amplifier’s input to be
switched between the signal from the modulator and the signal applied
at LOHB. This enables a GMSK-modulated DCS1800/PCS1900 signal
on the LOHB input to be switched into the RF signal path.
The output is an open collector. The outputs are matched off-chip.
VCC
RF OUT HB P
RF OUT HB N
Complementary differential high band PA driver amplifier output.
See pin 15.
See pin 15.
16
17
RF OUT
HB P
RF OUT
WB N
Differential high band PA driver amplifier output.
This output is intended for wide band (W-CDMA) applications.
The output is an open collector. The output are matched off-chip.
VCC VCC
VCC
RF OUT WB P
RF OUT WB N
Complementary differential wideband PA driver amplifier output.
See pin 17.
See pin 17.
18
RF OUT
WB P
Ground.
19
20
GND
MODE A
Mode control pin. See the Logic Truth table.
CMOS Logic inputs: Logic 0=0V to 0.4V; Logic 1=1.4V to V
See pin 6.
.
CC
Supply for modulator, VGA and PA driver amplifiers.
21
VCC1
VCC1
LO Quadrature
Generator and
Buffers
GND1
Rev A0 060206
5-127
RFMD [ RF MICRO DEVICES ]
