Date: 15th Dec 2010
Gain block amplifiers from Avago for wireless
base-station equipment
Avago Technologies has announced two new gain block amplifiers
targeting cellular infrastructure applications. The new
MGA-31589 and MGA-31689 0.5-watt gain blocks are designed
to offer high linearity, high gain, superior gain flatness
and low power dissipation. The MGA-31589 gain block addresses
cellular and WiMAX wireless base station and other wireless
systems operating between 450 to 1500 MHz, while the MGA-31689
device addresses these applications operating between 1500
to 3000 MHz.
The MGA-31x89 power amplifier family is optimized for frequency
in order to deliver improved performance across all the
major cellular bands - GSM, CDMA, and UMTS - plus next-generation
LTE bands. The new 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 3000 MHz.
MGA-31x89 devices are all available in the compact, industry-standard
SOT-89 package. Avago says sharing a common footprint and
PCB layout allows a single design to support multiple frequencies
and geographic markets with a choice of output power and
the gain blocks can also replace existing market solutions
as a pin-to-pin, drop-in replacement offering better linearity
and power performance.
The devices' high gain can reduce the total number of RF
stages needed. The performance gains of the MGA-31x89 family
are made using Avago's proprietary, 0.25 µm GaAs enhancement-mode
pHEMT semiconductor process.
At the typical operating condition of 5V and 146 mA, the
MGA-31589 device delivers performance of 20.4 dB Gain, 45.3
dBm Output Third Order Intercept Point (OIP3), 27.2 dBm
Output Power at 1 dB Gain Compression (P1dB) and 1.9 dB
noise figure at 900 MHz. In addition, the MGA-31589 device
delivers superior gain flatness of less than 0.2 dB across
100 MHz bandwidth.
At the typical operating condition of 5V and 168 mA, the
MGA-31689 device delivers performance of 18.1 dB Gain, 44.9
dBm Output Third Order Intercept Point (OIP3), 27.6 dBm
Output Power at 1 dB Gain Compression (P1dB) and 1.9 dB
noise figure at 1900 MHz. The MGA-31689 device also delivers
superior gain flatness of less than 0.2 dB across 100 MHz
bandwidth.
Additional MGA-31589 and MGA-31689 Product Features
o Input and output pre-matched, thus only requiring a minimum
amount of external RF matching components
o Excellent uniformity in product specifications to minimize
yield impact
o RoHS-Compliant and MSL-1 rated SOT-89 package: lead and
halogen free
Price: at $2.63 each in 10K pieces
Availability: Now
Editorial Product Rating: ** (Average Plus)
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