Gain blocks for cellular bands GSM, CDMA and UMTS

An Avago Technologies product story
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Edited by the Electronicstalk editorial team Dec 20, 2010

Avago Technologies has expanded its high-performance power amplifier range with the MGA-31589 and MGA-31689 0.5-watt gain blocks, suitable for cellular infrastructure applications.

The blocks feature high linearity, high gain, superior gain flatness and low power dissipation.

The MGA-31589 gain block addresses cellular, WiMAX wireless base station and other wireless systems operating between 450 to 1500MHz, while the MGA-31689 device addresses applications operating between 1500 to 3000MHz.

The MGA-31x89 power amplifier range is optimised for frequency in order to deliver improved performance across all the major cellular bands: GSM, CDMA and UMTS, in addition to next-generation LTE bands.

The gain blocks join with the 0.25-watt MGA-31189 and MGA-31289 devices and the 0.10-watt MGA-31389 and MGA-31489 devices to serve applications from 50 to 3000MHz.

MGA-31x89 devices are all available in the compact, industry-standard SOT-89 package.

Sharing a common footprint and PCB layout allows a single design to support multiple frequencies and geographic markets with a choice of output power.

The gain blocks can also replace existing market solutions as a pin-to-pin, drop-in replacement that offers better linearity and power performance.

Performance gains of the MGA-31x89 range are made possible by Avago's proprietary, 0.25um GaAs Enhancement-mode pHEMT semiconductor process.

At the typical operating condition of 5V and 146mA, the MGA-31589 device delivers performance of 20.4dB gain, 45.3dBm Output Third Order Intercept Point (OIP3), 27.2dBm Output Power at 1dB Gain Compression (P1dB) and 1.9dB noise figure at 900MHz.

In addition, the MGA-31589 device delivers superior gain flatness of less than 0.2dB across 100MHz bandwidth.

At the typical operating condition of 5V and 168 mA, the MGA-31689 device delivers performance of 18.1dB gain, 44.9dBm OIP3, 27.6dBm P1dB and 1.9dB noise figure at 1900MHz.

The MGA-31689 device also delivers superior gain flatness of less than 0.2dB across 100MHz bandwidth.

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