RMPA1852 데이터 시트보기 (PDF) - Fairchild Semiconductor
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RMPA1852 Datasheet PDF : 11 Pages
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ADVANCED DATA SHEET
I/O Pin Description
Section
RF
Supply
Control
Signal
LB RF IN
HB RF IN
LB RF OUT
HB RF OUT
VBATT
LB VCC3
HB VCC3
BAND_SEL
TX EN
VMODE
VRAMP
Power
Detection
Ground
V_DET
GND
Pin(s)
7
1
14
8
4
12
10
2
3
5
6
11
Description
RF Input (Low Bands), DC Blocked within the part.
RF Input (High Bands), DC Blocked within the part.
RF Output (Low Bands), DC Blocked within the part.
RF Output (High Bands), DC Blocked within the part.
DC Supply for the Pre-Driver & Driver Stage of the PA’s
DC Supply for Final Stage (Low Bands)
DC Supply for Final Stage (High Bands)
Band Selection logic pin. A logic low selects the low band PA, and logic high selects the
high band PA.
PA enable line. A logic high enables the selected PA operation
This pin selects either GMSK or 8PSK operation for the PA’s. A logic low selects GMSK
mode. A logic high selects 8PSK mode.
In GMSK mode, the voltage on this pin controls the output power of the selected PA.
In 8PSK mode, the voltage on this pin is a digital voltage selecting the normal or low
power mode.
Power Detector output voltage in EDGE mode
9, 13 Ground
DC Control Requirements
DC Control
Description
Signal
Supplies
VBATT
LB VCC3
HB VCC3
Control
BAND SEL
TX EN
VMODE
VRAMP (EDGE
only)
Min
3.0
3.0
3.0
0
2.5
2.5
0.0
2.5
0.0
2.5
0
Specification
Typ
Max
3.5
4.3
3.5
4.3
3.5
4.3
–
0.1
–
2.85
–
2.85
–
0.1
–
2.85
–
0.1
2.85
0.1
Unit
V
V
V
V
V
V
V
V
V
V
V
Conditions
Not Charging, RF On
Not Charging, RF On
Not Charging, RF On
Band Select LOW
Band Select HIGH
Enabled
Disabled
Enabled (EDGE Mode)
Disabled (GSM Mode)
Normal EDGE operation
Low power EDGE operation
External Components
Type
Cap
Cap
Cap
Value
2.2 nF
2.2 µF, 33 pF
2.2 µF, 33 pF
Size
Description
Pin
0402
Vramp bypass
6
0402
HB VCC3 bypass
10
0402
LB VCC3 bypass
12
RMPA1852 Rev. C
7
www.fairchildsemi.com
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