RF3158PCBA-41X RFMD [RF Micro Devices], RF3158PCBA-41X Datasheet - Page 11

• Manufacturer Part Number: RF3158PCBA-41X
• Description: QUAD-BAND GSM/EDGE/GSM850/EGSM900 /DCS/PCS POWER AMPLIFIER MODULE
• Manufacturer: RFMD [RF Micro Devices]

Rev A2 DS070615
Pin
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
HB_RFOUT
LB_RFOUT
HB_RFIN
BAND_SEL
Function
LB_RFIN
VMODE
VRAMP
TX_EN
VBATT
GND
GND
GND
GND
GND
GND
GND
GND
GND
Description
RF input to the high-band PA. There is a 100Ω shunt resistor, before the
DC block inside the part, which sets the input impedance for the HB PA.
When connected to a DC coupled transceiver, an external DC blocking
capacitor is required.
Digital input enables either the low band or high band amplifier die within
the module. A logic low selects Low Band (GSM850/EGSM900), a logic
high selects High Band (DCS1800/PCS1900). This pin is a high impedance
CMOS input with no pull-up or pull-down resistors.
Digital input enables or disables the internal circuitry. When disabled, the
module is in the OFF state and draws virtually zero current. This pin is a
high impedance CMOS input with no pull-up or pull-down resistors.
Main DC power supply for all circuitry in the RF3158. Traces to this pin will
have high current pulses during operation so proper decoupling and rout-
ing to handle this should be observed.
Digital input which internally adjusts settings to optimize amplifier perfor-
mance for saturated or linear mode. A logic low selects saturated mode for
GMSK modulation. A logic high selects linear mode for 8PSK modulation.
This pin is a high impedance CMOS input with no pull-up or pull-down resis-
tors.
In GMSK mode, the voltage on this pin controls the output power by varying
the regulated collector voltage on the amplifiers. In EDGE mode, the volt-
age on this pin varies the regulated base bias of the amplifiers. An internal
300kHz filter reduces switching ORFS resulting from transitions between
DAC steps. Most systems will have no need for external V
pin provides an impedance of approximately 60kΩ.
RF input to the low-band PA. It is DC-blocked within the part.
Ground.
Ground.
Ground.
RF output from the low-band PA. It is DC-blocked within the part.
Ground.
Ground.
Ground.
Ground.
Ground.
RF output from the high-band PA. It is DC-blocked within the part.
Ground.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ([phone] or [e-mail].
RAMP
filtering. This
Interface Schematic
LB_RFIN
DC Block
BAND SEL
RF3158 PAM
RF3158 PAM
External
TX EN
HB_RFIN
TX EN
V R A M P
RF3158
RF3158 PAM
DC Block
DC Block
DC Block
RF3158 PAM
100 Ω
DC Block
300 kH z
VBATT
TX ON
HB_RFOUT
LB_RFOUT
GSM CTRL
DCS CTRL
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