Compact RF front-end modules target 802.11 a/b/g/n WiFi products

Hsinchu, Taiwan—Epicom has developed what it claims is the industry's smallest RF front-end module in a 4-mm x 4-mm x 0.6-mm QFN package, supporting 802.11a/b/g/n dual band and multi-mode WiFi products.

The RF front-end module (FEM) employs Epicom's patented linearized power amplifiers integrated with T/R diversity switch, low noise amplifier, filters, diplexers, power detector, and all biasing and matching circuitry.

The FM7805 is a reduced-size version of its predecessor chip, the FM7705. The FM7805 is a fully integrated FEM designed for 2.4 GHz and 5 GHz dual-band 802.11a/b/g/n WiFi applications where low operating current is required for long battery life. The FM7805's compact size is well-suited for platforms with limited space such as WiFi-enabled handheld PDAs, smart phones, digital cameras, mobile cellular and VoIP phones.

The device features a high isolation SPDT antenna diversity switch, a receiver path with Rx diplexer and LNA with 3dB NF and 12dB gain, and a dual PA transmit path with 802.11b/g ACPR compliant output power of 20dBm, and 16dBm, respectively, at the antenna port and 15dBm for 802.11a operation with an error vector magnitude (EVM) of less than 3% and 4% for the two bands. The operating current is 150mA for 802.11b/g applications and 170mA for 802.11a, when biased at single supply voltage of 3.3 volts.

The device is also suitable for IT-based 802.11a/b/g/n WLAN applications
such as card bus, mini-PCI, PCI-Express, USB, SDIO and SPI designs, where performance, yield and size are important.

Pricing: Less than $2 in volume.
Availability: Sampling and evaluation.
Datasheet: click here.

Epic Communications Inc., +886 (03) 577-5776,

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