SKY85728-11

RF Front End (LNA + PA) Overview

The SKY85728-11 is a highly integrated 5 GHz front-end module (FEM) designed for high-power 802.11ac applications. It incorporates a single-pole, double-throw transmit/receive switch, a low-noise amplifier with bypass, and a power amplifier. The device operates at a supply voltage of 5 V and delivers an output power of +23 dBm at -30 dB DevM in HT40 MCS7 mode. Transmit gain is specified at 32 dB, while receive gain exceeds 15 dB. It is housed in a compact 24-pin QFN package measuring 3 x 5 mm.

RF Front End (LNA + PA) Feature Summary

• Integrates a 5 GHz SPDT T/R switch, LNA with bypass, and PA for complete front-end functionality
• Includes an integrated power detector to enable closed-loop power control within the system
• Features disable functions for both LNA and PA to ensure low leakage current in off-mode

RF Front End (LNA + PA) Applications

• 802.11ac networking systems
• Personal computing systems
• PC cards, PCMCIA cards, mini-cards, and half mini-cards
• WLAN-enabled wireless video systems

RF Front End (LNA + PA) Procurement Notes

Verify component authenticity through authorized Skyworks distributors or direct manufacturer channels. Confirm that the received part matches the specific SKY85728-11 designation and package type. Check for moisture sensitivity handling requirements as indicated by MSL ratings. Ensure compliance with RoHS3 standards if required by your manufacturing process. Validate all electrical parameters against the official datasheet before integration into final designs.

RF Front End (LNA + PA) Selection Notes

Select this module for designs requiring high output power in 5 GHz WLAN environments. The integrated nature reduces board space significantly compared to discrete solutions. Consider the 5 V supply requirement when designing power rails. The inclusion of a power detector simplifies system-level power control loops. Evaluate thermal management needs given the high-power capabilities and compact QFN footprint.

RF Front End (LNA + PA) Part Context

This component belongs to the Skyworks SKY85728 series of RF front-end modules. It is specifically engineered for 5 GHz wireless local area network applications. The series focuses on high integration to minimize circuit board area. It supports modern Wi-Fi standards requiring robust signal transmission and reception capabilities.

RF Front End (LNA + PA) Replacement Considerations

SKY85724-11 is a related module but differs in package (DFN-10 vs QFN-24), supply voltage (3.6 V vs 5 V), and gain specifications. Verify pin compatibility and electrical performance differences before substitution.