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RF/Microwave??

Wi-Fi gets a lift with SiGe's PA

Posted: 22 Apr 2008 ?? ?Print Version ?Bookmark and Share

Keywords:SE2587L SiGe PA? power amplifier? 802.11g 802.11b?

SiGe Semiconductor's SE2587L power amplifier (PA) delivers excellent linearity at transmit power levels of +19dBm in 802.11g mode and +24dBm in 802.11b mode.

The high linearity optimizes transmission of greater data rates over longer distances and enables systems to support emerging wireless multimedia applications such as video distribution, video streaming and high-speed data.

Packaged in a 3x3 QFN package, the SE2587L is the smallest of SiGe Semiconductor's discrete power amplifiers. Its pin-out sequence is compatible with the company's widely used SE2527L, SE2528L and SE2581L, minimizing the layout changes and allowing manufacturers to easily migrate to the new device for next-generation designs.

SiGe Semiconductor offers application notes and support to replace discrete inductors used for output matching to patterned-on traces, taking advantage of the board space freed by the smaller footprint of the SE2587L. This could result in a savings of about 20 percent off the external bill of materials, according to the company.

The SE2587L is based on SiGe's proven power amplifier architecture optimized for 802.11b and 802.11g operation. Leveraging an advanced silicon germanium technology, the device features a market-leading combination of linearity, accuracy and stability.

The power amplifier is characterized for both 3.3V and 5V operation for nominal and high power applications, respectively.

SiGe integrates the reference voltage generator on-chip, allowing the PA to be enabled with a standard 1.8V CMOS digital signal, and eliminating the large and current hungry external reference voltage generators. The power amplifier also integrates power detector that maintains accuracy even under high antenna mismatch.

The SE2587L is available now, and priced at 40 cents in volumes of 100,000.

- Jack Shandle
Wireless Net DesignLine





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