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November 30, 2009

Microsemi unveils 2.4GHz wireless LAN power amplifier

Designed for wireless access points and routers that demand improved broadcast range and data rates

By CBR Staff Writer

Microsemi has launched volume production of its LX5518 power amplifier (PA) for IEEE 802.11b/g/n wireless LAN applications in the 2.4GHz to 2.5GHz frequency range.

The company claims that the LX5518 amplifier is optimised for ultra-high linear output power from -40 to +85OC while delivering low power-added efficiency (PAE).

The company said that the new PA is designed for applications such as wireless access points and routers that demand improved broadcast range and data rates to accommodate challenging radio frequency transmission environments. The LX5518 addresses these by delivering 26.2dBm of orthogonal frequency division multiplexing (OFDM) output power at 3% error vector magnitude (EVM) while consuming 391mA of current for cooler operation.

According to Microsemi, the features of the new LX5518 PA include, pout 24dBm for 3.5% EVM with 3.3V supply, 30dB+ OFDM power gain, 50-ohm input match, simplified output match and temperature-compensated on-chip output power detector with wide dynamic range.

Microsemi said that LX5518 is pin-compatible with its earlier LX5535 PA and adds 1.5 – 2dBm of output power enabling customers migrate to higher power without requiring changes to their existing designs.

Kang Hee Kim, RF product line manager of analog mixed signal group at Microsemi, said: This new LX5518 device reflects Microsemi’s leadership in WLAN power amplifiers, demonstrating our ability to alleviate difficult thermal performance challenges typically found in high-output power applications. It can simplify the design of new high-output-power WLAN products as well as next-generation products migrating from our earlier LX5535 amplifier.

Microsemi’s portfolio of IEEE 802.11a/b/g/n WLAN, 802.16e WiMAX and WiBro power amplifiers are used in a variety of applications including wireless access points and half mini-cards for notebooks and netbooks.

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The LX5518 is in volume production and housed in a RoHS-compliant 16-pin, 3 x 3 x 0.9mm quad flat no-lead (QFN) package.

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