SKY85331-11

RF Front End (LNA + PA) Overview

The SKY85331-11 is a highly integrated 2.4 GHz front-end module (FEM) designed for high-power 802.11ax WLAN applications. It incorporates a single-pole double-throw transmit/receive switch, a low-noise amplifier with bypass, and a power amplifier within a compact 24-pin 3 x 5 mm conformally shielded LGA package. The device features an integrated logarithmic power detector providing closed-loop control over a 20 dB dynamic range. Key electrical specifications include a transmit gain of 33 dB, an LNA gain of 15 dB, and output power capabilities of +20 dBm, +22 dBm, and +24 dBm at respective DEVM levels of -43 dB, -40 dB, and -35 dB for MCS11 and MCS9 modulation schemes.

RF Front End (LNA + PA) Feature Summary

• Integrates a 2.4 GHz SPDT T/R switch, LNA with bypass, and PA for complete signal path management
• Includes an integrated temperature-compensated logarithmic power detector for precise closed-loop power control
• Features fully matched input and output impedances to simplify RF circuit design
• Provides disable functions for the LNA and PA to ensure low leakage current in off-mode operation

RF Front End (LNA + PA) Applications

• Indoor and outdoor 802.11ax networking systems
• WLAN-enabled wireless video streaming systems

RF Front End (LNA + PA) Procurement Notes

Verify that the specific order quantity aligns with manufacturer packaging constraints, as standard bulk quantities may apply. Confirm that the receiving facility's ESD protection protocols meet the requirements for the MSL3 classification and 260°C reflow soldering profile specified by JEDEC J-STD-020 standards. Ensure storage conditions remain within recommended limits prior to assembly to maintain component integrity.

RF Front End (LNA + PA) Selection Notes

Select this component for designs requiring high output power and strict linearity compliance in 2.4 GHz WLAN environments. The integrated power detector simplifies calibration processes compared to discrete solutions. Evaluate the 3 x 5 mm package dimensions against available PCB real estate, noting the potential for more than 50 percent reduction in front-end board space relative to non-integrated alternatives.

RF Front End (LNA + PA) Part Context

This part belongs to the Skyworks SKY85331 family of front-end modules. The SKY85331-11EK1 is an associated evaluation kit designed specifically for testing the SKY85331-11 performance characteristics. The device represents a consolidation of multiple RF components into a single shielded package to enhance performance and reduce system footprint.

RF Front End (LNA + PA) Replacement Considerations

Public confirmed substitute part numbers are not provided in the available documentation.