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Power amp operates in 2.4GHz band

Posted: 23 Apr 2007     Print Version  Bookmark and Share

Keywords:power amplifier  embedded Wi-Fi  802.11b/g applications 

The SE2582L power amplifier from SiGe Semiconductor operates in the 2.4GHz frequency band and supports all of the requirements for 802.11b/g applications.

Based on an integrated architecture that boosts power efficiency, reduces system-level cost and optimises Wi-Fi system performance, SE2582L features a high-performance power detector, all matching circuitry, and digital enable control in a compact 3-by-3mm QFN package. Applications of the device include access points, laptops, PC cards and embedded Wi-Fi applications.

Lead customers are pairing two SE2582L devices together to support multiple input, multiple output 802.11n operation. The higher throughput of 802.11n will allow manufacturers to support consumer applications that go beyond data and internet to high definition video and media distribution.

The SE2582L delivers 17.5dBm output power at an error vector magnitude of 3 per cent using 105mA while operating in 802.11g mode. All adjacent channel power ratio requirements are met while operating at 20dBm output power in 802.11b mode.

The amplifier also includes a temperature controlled power detector featuring 20dB of dynamic range and digital enable control for transmitter power ramp on/off control. This functionality allows for a seamless interface with CMOS transceivers, without the use of external logic or reference voltages.

In addition, the device features low quiescent current of 48mA, allowing increased efficiency at reduced power levels. The low power consumption allows multiple power amplifiers to be integrated without impacting battery life, thus allowing higher data rates to be supported in Cardbus or PCI-Express applications, or mobile appliances, including cell phones and PDAs.

The SE2582L power amplifier is in production and is priced at 65 cents in 10,000-unit quantities.

- Ismini Scouras

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