The ATA5279 is capable of sequentially driving up to six separate 125 kHz 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 interferences 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.(R)) technology, which, amongst others, results in a very low power-down current consumption of 6 uA to 8 uA, 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 ideal fit for all LF 125-kHz-based Passive Entry Go (PEG) and Passive Go (PG) hands-free car access systems.
Availability and Pricing
Samples of the ATA5279 are now available in RoHS-compliant QFN48 packages measuring only 7 mm x 7 mm. Pricing starts at US $3.31 (for 10k piece quantities). To support the system designer, an LF trigger board (ATAB5279), an AVR(R)-based main board (ATAB-LFMB-79), a 3D LF receiver board (ATAB5282), and an additional LF antenna module (ATAB-LFTX-Mod1) are also available.
Footnote ASIC = Application-Specific Integrated Circuit BCD = Mixed technology: Bipolar CMOS DMOS EMC = Electro Magnetic Capability LF = Low Frequency OEM = Original Equipment Manufacturer PEG =Passive Entry Go PG = Passive Go QFN = Quad Flat No leads RoHS = Restriction of Hazardous Substances SOI= Silicon on Insulator
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