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First LF antenna driver rolls for PEG, PG systems

Posted: 24 Apr 2008 ?? ?Print Version ?Bookmark and Share

Keywords:LF coil driver IC?

Atmel Corp. has made available the new LF coil driver IC ATA5279 designed for Passive Entry Go (PEG) and Passive Go (PG) hands-free car access systems. The device is claimed to be is industry's first and only off-the-shelf antenna driver IC. Compared to today's discrete or ASIC solutions, this IC enables much smaller and considerably less expensive designs, while at the same time offering increased reliability.

The ATA5279 is capable of sequentially driving up to six separate 125kHz low-frequency antennas (i.e., coils) to provide a wake-up and initialization channel to the key fob. Superior EMC behavior is guaranteed by the sinusoidal-like output signals at all six channels, which helps avoid interference with other electronic car components. In addition, the IC has twenty individually selectable coil currents steps at each channel to enable precise field-strength measurements.

With its superior diagnostics, the ATA5279 monitors all six connected antennas and stores any possible failures in the internal register. As a result of this, the ATA5279 protects the system and itself from any damage, reducing service work at the OEM's assembly line and their authorized repair shops.

The ATA5279 is manufactured using Atmel's own BCD-on-SOI (SMART-I.S.) technology, which, amongst others, results in a very low power-down current consumption of 6?A to 8?A, thus minimizing battery usage. The ATA5279 also meets strict automotive qualification demands by withstanding load dump and jump start scenarios as specified by ISO/TR 7637/1. The new antenna driver IC ATA5279 is, of course, fully protected against electrical and thermal overloads.

Outstanding EMC behavior, superior diagnostics and the ability to drive six separate low-frequency antennas make the ATA5279 an suitable fit for all LF 125kHz-based Passive Entry Go (PEG) and Passive Go (PG) hands-free car access systems.

Samples of the ATA5279 are now available in RoHS-compliant QFN48 packages measuring only 7mm x 7mm. Pricing starts at $3.31 (for 10k piece quantities). To support the system designer, an LF trigger board (ATAB5279), an AVR-based main board (ATAB-LFMB-79), a 3D LF receiver board (ATAB5282), and an additional LF antenna module (ATAB-LFTX-Mod1) are also available.





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