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Low noise amplifier for GPS mobile phones

Infineon Technologies has added to its portfolio with a high-sensitivity low noise amplifier (LNA) for GPS-enabled mobile phones. Bearing mobile phone design requirements in mind, the BGA715L7 has been optimised for high-sensitivity and immunity to interference of cellular signals.

GPS functionality is expected to be a standard feature for next generation mobile phones. Market research company IMS Research suggests that it is a market that will grow at a compound average growth rate of 33.7 percent until 2011, with GPS functionality featuring in at least a third of all mobile phones to be produced in 2011.

High sensitivity and high immunity against interference are important features. For safety reasons, government regulations, for example in the USA and in Japan, require mobile phones to receive GPS signals at very low power levels. This means signal reception has to be ensured indoors and even in underground car parks.

The BGA715L7 is based on Infineon's SiGe:C technology, resulting in a reputed 'best-in-class' noise figure of 0.6 dB, which is a 0.2 dB improvement over the next SiGe competitor claims Infineon. Low current consumption is another feature ” at 3 mA is approximately 20 percent lower than alternative devices.

Boasting a broad power supply, ranging from 1.5 V to 3.6 V, and digital control ranging from 1.0 V to 3.6 V, compatibility with all GPS chipsets available is ensured. The BGA715L7 records a gain of 20 dB and high linearity (input compression point of -12 dBm at 2.8 V). An internal smart biasing circuit ensures stable operation over temperature and supply voltage variations. On-chip ESD protection is provided up to 1 kV HBM, simplifying system ESD protection.

The BGA715L7 comes in a leadless TSLP7-1 package of 2.0 mm x 1.3 mm x 0.4 mm in size, which is pin compatible with its predecessor, the BGA615L7.

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