Off-Chip Rf Components - LG -P350 Service Manual

3. TECHNICAL BRIEF

3.6 OFF-CHIP RF COMPONENTS

3.6.2. UMTS PAM (U1002, ACPM-5281)
The ACPM-5281 is a dual-band PAM (Power Amplifier Module) designed for UMTS Band1 and Band8. The
ACPM-5281 meets stringent UMTS linearity requirements. The 4mmx5mm form factor 14-pin surface mount
package is self contained, incorporating 50ohm input and output matching networks.
The ACPM-5281 features 5th generation of CoolPAM circuit technology which supports 3 modes – bypass,
mid and high power modes. The CoolPAM is stage bypass technology which enables power amplifier to
lower power consumption. Active bypass feature is added to 5th generation to enhance power added
efficiency at low output range and this technology extends talk time of mobiles more by further saving
power amplifier's current consumption.
The power amplifier is manufactured on an advanced InGaP HBT (hetero-junction Bipolar Transistor) MMIC
(microwave monolithic integrated circuit) technology offering state-of-the-art reliability, temperature
stability and ruggedness.
The Module is housed in a cost effective, small and thin 4x5mm package.
ACPM-5281 (W2100,W900)
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