Linear power amplifier targets 700-800 MHz 4G LTE infrastructure

Linear power amplifier targets 700-800 MHz 4G LTE infrastructure

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By eeNews Europe

Designed for superior signal quality while transmitting at high data rates, the MGA-43128 features low distortion and high power added efficiency (PAE) that help 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 18.0 dB attenuation, and the device also has a temperature-compensated power detector on chip.

The MGA-43128’s very linear output power is achieved by using an Avago proprietary 0.25 µm GaAs Enhancement-mode pHEMT process, which allows single 5-V supply operation and useable performance down to 3.3 V. The 700 MHz device joins the company’s 29 dBm linear power amplifier family, following the released MGA-43228 and MGA-43328 power amplifiers that cover 2300 to 2500 MHz and 2500 MHz to 2700 MHz, respectively. All devices in the series have a common package footprint to further simplify design.

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

Some MGA-43128 features include a high gain of 33.4 dB, high linearity performance of 29.1 dBm linear Pout at 2.5% error vector magnitude (EVM), and high 750 MHz efficiency: 22% PAE at linear Pout. The device is 3GPP spectral mask complaint at 29 dBm output power and has a power shutdown feature with <50 µA shutdown current.

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