RM008 Datasheet, PDF (1/12 Pages) Skyworks Solutions Inc. – PA Module for Dual-band GSM900 and DCS1800 Applications

RM008
PA Module for Dual-band GSM900 and DCS1800 Applications
The RM008 is a dual-band Power Amplifier Module (PAM) designed in a compact
form factor for Class 4 GSM900 and Class 1 DCS1800 operation.
The PAM consists of two Gallium Arsenide (GaAs) Heterojunction Bipolar Transistor
(HBT) power amplifiers and internal components that match the RF input and output
ports to 50 ohms, which reduces the number of external components for a dual-band
design. Optimized for lithium-ion battery operation, both PAs share common power
supply pins to distribute current. The RM008 dual PAM has extremely low standby
current, which maximizes handset standby time.
A block diagram of the RM008 is shown below. The Analog Power Control (APC) pins
(GSM APC and DCS APC), control output power level. Table 4 of this data sheet
shows the complete signal pin assignments and descriptions of the RM008
dual-band Power Amplifier Module.
Distinguishing Features
• High efficiency
GSM 50%
DCS 45%
• Input and output matching
50 ohms internal
• Small outline
9.1 mm x 11.61 mm
• Low profile
1.64 mm
Applications
• Class 4 GSM900 and Class 1
DCS1800 dual-band cellular
handsets
Functional Block Diagram
DCS IN
DCS APC
GSM APC
GSM IN
HBT
HBT
DCS OUT
GSM OUT
Data Sheet
Skyworks Solutions, Inc. Proprietary
© 1999–2002 Skyworks Solutions, Inc., All Rights Reserved.
100781D
July 26, 2002