18 January 2012

Avago launches high-gain linear power amplifier for 700-800MHz 4G LTE cellular infrastructure equipment

Avago Technologies has launched a high-gain (33.4dB), high-linearity power amplifier for high-data-rate applications in 700-800MHz cellular infrastructure equipment. The MGA-43128 provides what is claimed to be superior signal transmission quality with low power consumption for LTE AP, CPE, and picocell equipment, and can also serve as a base-station driver amplifier.

Designed for superior signal quality while transmitting at high data rates, the MGA-43128 features low distortion and high power-added efficiency (22% PAE at linear Pout for 750MHz), which help to reduce power consumption. RF input is fully matched, while the output includes integrated pre-match circuitry for matching and application simplicity. An integrated bypass switch controlled attenuator provides up to 18.0dB attenuation (using a single CMOS-compatible switch pin), and the device also has a temperature-compensated output power detector on-chip.

The MGA-43128’s very linear output power is achieved by using a proprietary 0.25µm GaAs enhancement-mode pHEMT process, which allows single 5V supply operation and usable performance down to 3.3V.

With high-linearity performance of 29.1dBm linear Pout at 2.5% error vector magnitude (EVM), the 700MHz MGA-43128 joins Avago’s 29dBm linear power amplifier family, following the launch in March 2010 of the MGA-43228 and MGA-43328 power amplifiers (which cover 2300-2500MHz and 2500-2700MHz, respectively). All devices in the series have a common package footprint to further simplify design.

The MGA-43128 is offered in a miniature 5.0mm x 5.0mm x 0.85mm surface-mount, 28-lead QFN package and operates over a temperature range of -40°C to +85°C. The package is lead free and halogen free, and has a moisture sensitivity rating of MSL-2a to permit a floor-life of four weeks out of the bag.

Samples and production quantities are available now through Avago’s direct sales channel and worldwide distribution partners. An evaluation board is also available.

Tags: Avago High-gain linear power amplifier GaAs pHEMT

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