Integrated fibre transceiver cuts cost of gigabit connectivity

March 31, 2021 // By Christoph Hammerschmidt
Fibre optic transceiver makes gigabit connectivity cheaper
KDPOF in Spain has developed an integrated optical transceiver for backbone and ADAS sensor links in vehicles.

The integrated KD9351 Fibre Optic Transceiver (FOT) from KDPOF reduces costs for optical in-vehicle networks at 1Gbit/s. Incorporating the transmit and receive optoelectronics into one single component, the KD9351 is an optical transceiver for 100 Mbit/s up to 1 Gbit/s with a small footprint.

“Compared to STP (shielded twisted pair of copper wires), the combination of the KD9351 FOT with the continuing KD1053 IC cuts the cost for 1 Gb/s by 30 percent,” said Carlos Pardo, CEO and Co-founder of KDPOF. “The new integrated device provides enhanced efficiency and flexibility. It thus paves the way to optical multi-gigabit Ethernet in the vehicle.”

Applications for the new KD9351 for EMC critical or galvanic isolated critical links include safe Ethernet backbones and sensor links for advanced driver assist systems (ADAS).

The chip designer significantly lowers costs for the new KD9351 by constructing the transimpedance amplifier, photodiode, LED driver, and LED as one single device. Additional benefits are a shorter supply chain and no test duplication with the final test at the Tier1 customer. Furthermore, the assembly of the FOT and the existing KD1053 IC is simplified and the connector offers snap-fit without soldering.

The KD9351 reuses low-cost MEMs encapsulation and allows SMD reflow assembly with 8 by 7 mm LGA components. It is fully shielded against electromagnetic radiation. Fibre connection is done with a simple plastic connector placed on top. The temperature range, from -40°C to +105°C, conforms with harsh automotive environmental requirements. The FOT withstands motor conditions with a vibration class of V2. Additionally, the device endures water without sealing. EMC performance meets high expectations even with the ECU shield case removed, as shielding is integrated into the PCB component and the optics implement the Tx and Rx lenses.

Samples are available.

www.kdpof.com

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