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SST12LF01
2.4 GHz Front-End Module

The SST12LF01 is a 2.4 GHz Front-End Module (FEM) that combines a high-performance Low-Noise Amplifier (LNA) and a Power Amplifier (PA).
Designed in compliance with IEEE 802.11 b/g applications and based on GaAs PHEMT/HBT technology, the SST12LF01 operates within the frequency range of 2.4– 2.55 GHz at a very low DC-current consumption. There are two components to the FEM: the Receiver (RX) chain and the Transmitter (TX) chain.

The RX chain consist of a cost effective Low-Noise Amplifier (LNA) cell which requires no external RF-matching components. This device is based on the 0.5m GaAs PHEMT technology, and complies with 802.11 b/g applications.

The LNA provides high-performance, low-noise, and moderate gain operation within the 2.4–2.55 GHz frequency band. Across this frequency band, the LNA typically provides 14 dB gain and 1.45 dB noise figure.

This LNA cell is designed with a self DC-biasing scheme, which maintains low DC current consumption, nominally at 11 mA, during operation. Optimum performance is achieved with only a single power supply and no external bias resistors or networks are required. The input and output ports are singled-ended 50 Ohm matched. RF ports are also DC isolated requiring no dc blocking capacitors or matching components to reduce system board Bill of Materials (BOM) cost.

The TX chain includes a high-efficiency PA based on InGaP/GaAs HBT technology. The PA typically provides 30 dB gain with 22% power-added efficiency at POUT = 22 dBm for 802.11g and 27% power-added efficiency at POUT = 24 dBm for 802.11b.

The Transmitter chain has excellent linearity, typically <4% added EVM up to 20 dBm output power, which is essential for 54 Mbps 802.11g operation while meeting 802.11g spectrum mask at 23 dBm.

The SST12LF01 is offered in 24-contact WQFN package.

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