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Avago Technologies’ MGA-52543 is an economical, easy-
to-use GaAs MMIC Low Noise Amplifier (LNA), which
is designed for use in LNA and driver stages. While a
capable RF/microwave amplifer for any low noise and
high linearity 0.4 to 6 GHz application, the LNA focus is
Cellular/PCS base stations.
To attain NFmin
condition, some simple external matching
is required. The MGA-52543 features a calculated NFmin
of
1.61 dB and 15 dB associated gain at 1.9 GHz from a cascode
stage, feedback FET amplifer. The input and output are
partially matched to be near 50 Ω.
For base station radio card unit LNA application where
better than 2:1 VSWR is required, a series inductor on the
input and another series inductor on the output can be
added externally. The resulting Noise Figure is typically
1.9 dB with 14 dB Gain at 1.9 GHz. With a single 5.0V
supply, the LNA typically draws 53 mA. This alignment
results in an Input Intercept Point of 17.5 dBm.
The MGA-52543 is a GaAs MMIC, fabricated using Avago
Technologies’ cost-efective, reliable PHEMT (Pseudomor-
phic High Electron Mobility Transistor) process. It is housed
in the SOT-343 (SC70 4-lead) package. This package ofers
miniature size (1.2 mm by 2.0 mm), thermal dissipation,
and RF characteristics.