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GPS apps get immunity to interference via LNA

Posted: 28 Jul 2008 ?? ?Print Version ?Bookmark and Share

Keywords:high-sensitivity low noise amplifier? immunity to interference? GPS apps?

Announced at the Expo Comm Wireless Japan show, Infineon Technologies AG has introduced a high-sensitivity low noise amplifier (LNA) with a best-in-class noise figure for GPS applications. The BGA715L7 meets mobile phone design requirements for high-sensitivity and immunity to interference of cellular signals while contributing to increased battery lifetime with a very low power consumption of only 5.94mW and 1.8V supply voltage.

Based on Infineon's SiGe:C technology, the BGA715L7 offers a noise figure of 0.6dB, which is a 0.2dB improvement over the next SiGe competitor, according to Infineon. In addition, the low current consumption of only 3mA is about 20 percent lower compared to alternative devices, which results in longer battery lifetime.

The broad power supply range, from 1.5V to 3.6V, and digital control ranging from 1V to 3.6V ensure compatibility with all GPS chipsets available in the market and enable low-voltage designs for energy savings. The BGA715L7 shows a high gain of 20dB and high linearity (input compression point of -12dBm at 2.8V). An internal smart biasing circuit ensures stable operation over temperature and supply voltage variations.

On-chip ESD protection is provided up to 1kV HBM, which simplifies system ESD protection and makes the device very robust against ESD events during the assembly process. The BGA715L7 needs only three external passive components.

Pricing starts at 50 cents each in quantities of 10,000. The BGA715L7 is shipped in a lead-less TSLP7-1 package (2mm x 1.3mm x 0.4mm), which is pin-to-pin compatible with the predecessor product BGA615L7.

Samples are available now, with volume production scheduled to begin in September. Evaluation kits are also available.

- Gina Roos

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