Microchip unveils automotive MEMs oscillators

Microchip Technology has unveiled a DSA family of automotive grade Micro-Electro-Mechanical Systems (MEMS) oscillators that it says provide 20 times better reliability, 500 times better tolerance to shock and five times better vibration resistance than traditional quartz-based crystal devices.

The DSA family also includes the industry’s first multiple output MEMS oscillator, offering customers a solution that can replace multiple crystals or oscillators with one device.

Timing solutions with tight frequency stability over a wide temperature range are critical for applications such as Advanced Driver Assistance Systems (ADAS), Light Detection and Ranging (LiDAR), in-vehicle Ethernet and autonomous driving. Microchip’s DSA1001, DSA11x1, DSA11x5 and DSA2311 offer the highest tolerance to mechanical shock, jarring and stability in harsh environments over a frequency range of 2.3 MHz to 170 MHz. The devices are Automotive Electronics Council Q100 (AEC-Q100) qualified with +/-20 ppm stability over temperatures ranging from -40 to +1250Cs.

Crystal oscillators rely on the thickness of the crystal blank inside the oscillator, making them susceptible to vibration damage with longer lead-times and fixed frequency. This can delay product development or release times. MEMS oscillators have the advantage of achieving frequency through programming, giving them flexibility to quickly support new frequencies with shorter lead times, as well as to ramp in volume to help customers meet product launch schedules.

The DSA2311 can replace two crystals or oscillators on a board. The device addresses board space limits, saves costs and eases the design process, enabling customers to manage their supply and consolidate their bill of materials. The DSA2311 comes in a concise 2.5mm x 2.0mm package and is suited for applications that require a complex board with multiple controllers, such as infotainment systems and camera modules.

Neil Tyler