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802.11 b/g/a/n dual-band FEM

March 29, 2012 // Jean-Pierre Joosting

RFMD’s RF3688 is a single-chip dual-band front end module (FEM) for high performance WiFi applications in the 2.5 GHz and 5 GHz ISM bands.


It contains integrated PAs for 2.5 GHz and 5 GHz, Tx/Rx switch for each band, baluns for both low and high receive bands, bypass capacitors, built-in power detector for both bands, and filtering for transmit paths.

The RF3688 is packaged in a 24-pin, 4mmx4mm QFN package with backside ground. It operates from a single supply voltage of 3.0 V to 4.8 V. Power output specifications include: 11g POUT of 17 dBm, OFDM <2.4% EVM; 11a POUT of 16.5 dBm, OFDM <2.4% EVM; and POUT meeting 11b mask of 21.5 dBm.

Typical applications include cellular handsets, mobile devices, tablets, consumer electronics, gaming, netbooks/notebooks, and TV/monitors/video.

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