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SOT-89 FETs offer low cost, high linearity

Posted: 14 Feb 2005 ?? ?Print Version ?Bookmark and Share

Keywords:agilent technologies? e-phemt? enhancement-mode pseudomorphic high-electron-mobility transistor? fet? transistor?

Agilent Technologies Inc. announced two additional members of its family of high-linearity E-pHEMT (enhancement-mode pseudomorphic high-electron-mobility transistor) FETs (field effect transistors) in the industry-standard 4.5-by-4.1-by-1.5mm SOT-89 surface-mount package.

By using an industry-standard package, the new ATF-52189 and ATF-53189 and previously introduced ATF-50189 single-voltage E-pHEMT FETs simplify upgrading 50MHz to 6GHz base stations to higher-channel capacity.

The ATF-52189 and ATF-53189, from Agilent's Semiconductor Products Group, are designed for use in the transmitter power amplifiers and receiver low-noise amplifiers in cellular and PCS base stations, low-earth-orbit satellite systems, terrestrial multichannel multipoint distribution systems (MMDSs) and other communications applications operating from 450MHz to 6GHz.

The ATF-52189 features a 42dBm third-order output intercept point (OIP3) at 2GHz, which enables an efficient amplifier capable of handling a large number of voice and data channels. At 2GHz, its other specifications include 27dBm typical linear output power (P1dB), 16dB gain and 55-percent power-added efficiency (PAE), combined with a 1.5dB noise figure. Typical operating bias is 4.5Vdc at 200mA. It is particularly well-suited for use as a medium-power, high-linearity transmitter driver or pre-driver amplifier.

The ATF-53189 features a 0.85dB noise figure, combined with a 40dBm OIP3, 23dBm P1dB, 15.5dB gain and 46-percent PAE. Typical operating bias is 4Vdc at 135mA. This device is well suited for use as a low-noise high-linearity amplifier for receiver front-end stages or as a medium-power, high-linearity transmitter driver or pre-driver amplifier.

Both the ATF-52189 and ATF-53189 are based on the E-pHEMT process, which features excellent performance uniformity and a point mean-time-to-failure (MTTF) of greater than 300 years. These devices are supplied in lead-free packaging with a moisture sensitivity level-1 (MSL1) rating.

The ATF-52189 is priced at $2.56 each and the ATF-53189 at US$2.11 each, both in moderate volumes. They are available now through Agilent's direct sales channel and its worldwide distribution partners.

- Janine Love

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