RMPA1850 데이터 시트보기 (PDF) - Fairchild Semiconductor
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RMPA1850 Datasheet PDF : 9 Pages
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Signal Descriptions
Pin
Function
1
DCS/PCS IN
2
Band Select
3
TX_EN
4
VBAT
5
VREG
6
VRAMP
7
GSM IN
8
VCC2
9
GSM OUT
10
VOUT
11
DCS/PCS OUT
12
VCC2
Description
50Ω RF input of DCS/PCS band.
Logic high for DCS/PCS and logic low for GSM850/EGSM900 band.
Logic high to enable the PA module function.
Power supply to the PA module. This should be connected to battery. The decoupling
capacitor is required to filter the interference.
Normally, 2.8 volts are required at this node for the operation of control circuits.
Ramping signal from DAC to control the power level.
50Ω RF input of GSM850/EGSM900 band.
Power supply for the driver stage of the GSM850/EGSM900 band. This is internally
connected to VBAT node within the module.
50Ω RF output of GSM850/EGSM900 band.
Power supply for the power stages of GSM850/EGSM900 and DCS/PCS band. This is
internally connected to VBAT node within the module.
50Ω RF output of DCS/PCS band.
Power supply for the driver stage of the GSM850/EGSM900 and DCS/PCS band. This is
internally connected to VBAT node within the module.
DCS/PCS IN 1
VCC2
12
BAND SELECT 2
TX EN 3
VBAT 4
VREG 5
VRAMP 6
GSM IN 7
8
VCC2
11 DCS/PCS OUT
10 VOUT
9 GSM OUT
RMPA1850 Rev. A1
5
www.fairchildsemi.com
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