©2015

DS-70005001D

01/15

2

2.4 GHz WLAN High-Gain, High-Efficiency FEM

SST12LF02

Data Sheet

Product Description

SST12LF02 is a 2.4 GHz Front-end Module (FEM) designed in compliance with IEEE 802.11b/g/n

applications. It combines a high-performance Power Amplifier (PA) and a switch. There are three com-

ponents to the FEM: the Receiver (RX) chain, the Transmitter (TX) chain, and the Bluetooth® (BT)

chain.

The TX chain includes a high-efficiency PA based on the InGaP/GaAs HBT technology. This chain typ-

ically provides 29 dB gain with 27% power-added efficiency (PAE) @ POUT = 21 dBm for 802.11g and

26% PAE @ POUT = 21 dBm for 802.11b

The TX chain has excellent linearity, typically ~3% added EVM at 18 dBm output power which is essen-

tial for 54 Mbps 802.11g operation while meeting 802.11g spectrum mask at 21dBm. The SST12LF02

transmitter will also provide up to 17 dBm for 11n, MCS7-HT40 modulation and up to 16 dBm for 256 QAM,

MCS9-HT40 modulation.

SST12LF02 also features easy board-level usage along with high-speed power-up/down controls.

signal directly from the baseband chip. These features, coupled with low operating current, make the

SST12LF02 ideal for the final stage power amplification in battery-powered 802.11b/g/n WLAN trans-

mitter applications.

SST12LF02 has an excellent on-chip, single-ended power detector, which features wide-range (>15

dB) with dB-wise linearization. The excellent on-chip power detector provides a reliable solution to

board-level power control.

The input/output RF ports are single-ended and fully matched to 50



DC decoupled, and require no DC-blocking capacitors or matching components. This helps reduce the

system board Bill of Materials (BOM) cost.

The SST12LF02 is offered in a16-contact XQFN package. See Figure 2 for pin assignments and Table

1 for pin descriptions.