STMicroelectronics Intros STB7720L Power Amplifier

STMicroelectronics Inc. (ST, Geneva, Switzerland) introduced its STB7720L three-stage linear power amplifier for use in wireless LAN applications meeting the IEEE802.11b/g standards. It is designed for use in notebooks, PCs, PDAs and other mobile products. The STB7720L is optimized for the 2.4 GHz ISM band used by WLAN applications. It includes a bias network to improve linearity, power-down and quiescent current regulation, enabling the part to achieve 32 dB of power gain and 19 dBm of linear output power, with an error vector magnitude of just 2% under 802.11g modulation at 54 Mbit/s.

The part includes a linear analog control for dc current and output management and an average channel power detector. This has 20 dB dynamic range and provides a buffered dc voltage proportional to the average channel output power. Current consumption is 125 mA at 19 dBm output and 60 mA when quiescent, making the STB7720L a good solution for mobile applications.

The STB7720L is offered in a 3 mm x 3 mm, QFN16 leadless package, and is priced at $1.30 in quantities of 10,000 units.