參數(shù)資料
型號(hào)： RF2705PCBA-41X
廠(chǎng)商： RF Micro Devices, Inc.
英文描述： 887664400
中文描述： 低噪聲，多模，四頻，正交調(diào)制器及PA驅(qū)動(dòng)器
文件頁(yè)數(shù)： 15/24頁(yè)
文件大小： 379K
代理商： RF2705PCBA-41X
5-127
RF2705
Rev A4 041026
Pin
13
Function
RF OUT
LB N
Description
Differential low band PA driver amplifier output.
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.
The output is an open collector. The outputs are matched off-chip.
Interface Schematic
14
RF OUT
LB P
RF OUT
HB N
Complementary differential low band PA driver amplifier output.
See pin 13.
See pin 13.
15
Differential high band PA Driver amplifier output.
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.
16
RF OUT
HB P
RF OUT
WB N
Complementary differential high band PA driver amplifier output.
See pin 15.
See pin 15.
17
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.
18
RF OUT
WB P
GND
MODE A
Complementary differential wideband PA driver amplifier output.
See pin 17.
See pin 17.
19
20
Ground.
Mode control pin. See the Logic Truth table.
CMOS Logic inputs: Logic 0=0V to 0.4V; Logic 1=1.4V to V
CC
.
Supply for modulator, VGA and PA driver amplifiers.
See pin 6.
21
VCC1
V
CC
V
CC
RF OUT LB N
RF OUT LB P
V
CC
V
CC
V
CC
RF OUT HB N
RF OUT HB P
V
CC
V
CC
V
CC
RF OUT WB N
RF OUT WB P
V
CC
LO Quadrature
Generator and
Buffers
VCC1
GND1
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