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LNA improves receiver sensitivity for RKE, TPM apps

Posted: 28 Jul 2009 ?? ?Print Version ?Bookmark and Share

Keywords:automotive? LNA? receiver?


Maxim Integrated Products has launched the MAX2634 LNA optimized for remote keyless entry (RKE) and tire pressure monitoring (TPM) applications operating in the 315MHz and 433MHz bands.

Designed using the company's SiGe BiCMOS process, the fully integrated LNA improves receiver sensitivity with an ultralow, 1.25dB noise figure, while consuming a mere 2.5mA (typ) of supply current. The MAX2634 provides superior performance and current consumption in a smaller footprint than both discrete designs and highly integrated CMOS solutions.

The MAX2634 features a logic-enabled shutdown mode that reduces supply current to less than 1microamp, thus eliminating the two discrete transistors typically required to implement a shutdown function. Furthermore, this LNA removes the need for external DC-blocking capacitors, enabling a very small solution footprint for today's continually shrinking key-fob designs.

Additionally, the MAX2634 is fully qualified to meet the certification requirements of the AEC-Q100 standard. Customers can design-in the MAX2634 with full confidence that it will withstand the demanding external conditions experienced by automotive designs in the real world.

The MAX2634 operates from a 2.2V to 5.5V supply. Fully specified over the -40C to +125C automotive temperature range, it is available in an ultrasmall, 2mm x 2.2mm, 6-pin SC70 package. Prices start at $0.50 (1,000-up, FOB USA). An evaluation kit is available for bench-level evaluation and is priced at $50 (each, FOB USA).

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