MEMS and Sensors

Video: MEMS-based automotive oscillators for ADAS operations

05 October 2022

SiTime Corp. has rolled out a new automotive oscillator family based on the company’s microelectromechanical systems (MEMS) technology.

The oscillators are 10 times more resilient and have a reliable operation designed for advanced driving assistance systems (ADAS) in extreme road conditions and temperatures, SiTime said.

The oscillator family, dubbed STi9396/7, features include:

  • AEC-Q100 grade qualified for a temperature range of -40° C to 125° C
  • Performance of 150 fs jitter
  • 30 ppm stability
  • 20 times vibration sensitivity over previous oscillators
  • Flexible programmable features from 1 MHz to 920 MHz and 1.8 V to 3.63 V
  • 1 billion hours of MTBF
  • Differentiate output drivers including LVPECL, LVDS, HCSL and low power HCSL

According to Yole Group, the market for radar, camera, lidar and ADAS is accelerating quickly with a 13.2% compound annual growth rate growing from $15.4 billion in 2022 to $28.6 billion in 2027.

SiTime said because the oscillators are based on silicon MEMS technology, they are able to perform reliably in extreme conditions and ensure operations of ADAS computers, domain/zone controllers, radar and lidar subsystems.

As automotive safety systems integrate more sensors and cameras, they are generating an explosion of data that is crucial for safe, autonomous operation. According to the Automotive Edge Computing Consortium, a vehicle generates 2 TB per hour today, increasing 10 times to 20 TB per hour by 2025.

ADAS sensor data must be transferred at very high speeds within the in-car network, even in the most demanding environments, so that ADAS computers can make timely decisions for a safe, reliable journey.

“As more cars are equipped with ADAS technologies, precision timing becomes a critical component for safety,” said Piyush Sevalia, EVP marketing at SiTime. “SiTime’s automotive-grade timing solutions mitigate safety and reliability challenges, delivering unmatched benefits to automotive OEMs and Tier 1 suppliers. SiTime continues to expand its SAM and delivers higher performance levels to our automotive customers. We work with leading EV OEMs today to deliver autonomous driving innovations that are redefining how we drive, navigate, and experience our cars.”

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