New from Avago Technologies is a highly integrated miniature GPS front-end module that combines a film bulk acoustic resonator (FBAR) filter with a high-gain, low noise amplifier (LNA) that offers high performance levels.
The ALM-1912 is housed in a miniature 2,9 by 2,0 by 1,0 mm MCOB package to minimise the amount of printed circuit board space required and is suitable for use in space constrained applications. The integration of FBAR pre-filtering enables the module to provide excellent rejection at cellular, PCS and WiFi/Bluetooth frequencies. Additionally, the module leverages Avago’s 0,25 μm GaAs enhancement-mode pHEMT process to deliver a 1,62 dB noise figure, 19,3 dB gain, and +1,5 dBm input third order intercept point (IIP3) and more than 50 dBc of out of band rejection at typical operating conditions of 2,7 V and 6 mA.
Simultaneous GPS (S-GPS) and other location-based GPS services require a high level of receiver sensitivity. The ALM-1912 delivers a very low noise figure and high linearity which helps to improve the sensitivity of GPS applications. A CMOS-compatible shutdown pin is included for turning the LNA on/off or for current adjustment. The device has a built-in shunt inductor at the RF input pin to enhance ESD protection, which allows the device to survive more than 3 kV of Human Body Model (HBM) ESD charge at the RF input pin.
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