Off-Chip Rf Components - LG -P970 Service Manual

3. TECHNICAL BRIEF

3.6 OFF-CHIP RF COMPONENTS

3.6.1 UMTS PAM
3.6.1.1 W2100,W900 (U105, ACPM-5281), W1900(U103, ACPM-5202)
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-5202 is a fully matched 10-pin surface mount module developed for UMTS Band2. This power
amplifier module operates in the 1850-1910MHz bandwidth. The ACPM-5202 meets stringent UMTS linearity
requirements up to 28dBm output power (Rel99). The 3mmx3mm form factor package is self contained,
incorporating 50ohm input and output matching networks
The ACPM-5281 and ACPM-5202 feature 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.
[Figure 3-7] ACPM5281 (W2100,W900)
[Figure 3-8] ACPM-5202(W1900)
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