Heilbronn, GermanyAtmel Corp. is calling its LF coil driver chip, the ATA5279, the industry's first and only off-the-shelf antenna driver IC that is designed for Passive Entry Go (PEG) and Passive Go (PG) hands-free car access systems.
Compared with discrete or ASIC solutions, this IC enables much smaller and considerably less expensive designs, while at the same time offering increased reliability, the company said.
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.
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-µA to 8-µA, 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 ATA5279 is fully protected against electrical and thermal overloads.
Pricing: Starts at $3.31 (for 10k piece quantities).
Availability: Samples are now available in RoHS-compliant QFN48 packages measuring only 7 mm x 7 mm. 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.
Datasheet: Click here.