Efficient optical technology for safe backbone and ADAS sensor links

The new integrated KD9351 Fibre Optic Transceiver (FOT) from KDPOF lessens costs for optical in-vehicle networks at 1Gb/s. Including the transmit and receive optoelectronics in one single component, the device is an optical transceiver for 100Mb/s up to 1Gb/s with a small footprint.

“Compared to STP (shielded twisted pair of copper wires), the combination of the new KD9351 FOT with the continuing KD1053 IC cuts the cost for 1Gb/s by 30%,” explained 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, with competitive pricing for EMC critical or galvanic isolated critical links, include safe Ethernet backbones and sensor links for advanced driver assist systems (ADAS).

The company has significantly lowered costs for the new device by constructing the transimpedance amplifier, photodiode, LED driver, and LED as one singular device. Further benefits are a shorter supply chain and no test duplication with the final test at Tier 1. Moreover, the assembly of the FOT and the existing KD1053 IC is simplified, and the connector provides snap-fit with no soldering. The device reuses low-cost MEMs encapsulation and enables SMD reflow assembly with 8mm x 7mm LGA components. It is entirely shielded against electromagnetic radiation. Fibre connection is executed with a simple plastic connector placed on top. The temperature range, from -40C to +105C, conforms with harsh automotive environmental requirements. The FOT withstands motor conditions with a vibration class of V2.

Furthermore, the device endures water with no sealing. EMC performance is exceptional even with the ECU shield case removed, as shielding is combined into the PCB component. Optics implement Tx and Rx lenses.