Tiny MEMS mobile clock generator targets 5G and GNSS
SiTime Corporation has announced Symphonic, its first mobile clock generator, part number SiT30100, with an integrated MEMS resonator.
Symphonic provides accurate and resilient clock signals for 5G and GNSS chipsets and enables efficient power consumption in mobile and IoT devices such as smartphones, tablets, laptops, and asset trackers. The clock generator caters to a cumulative $2 billion served addressable market (SAM) in the next five years.
“Every generation of mobile devices becomes smarter, delivering greater functionality, personalisation and automation,” said Rajesh Vashist, CEO and chairman of SiTime. “Timing devices must withstand thermal and mechanical stressors as processing and connectivity speeds increase. Our newest mobile clock generator delivers the precision timing required for advanced connectivity of next-generation mobile devices.”
The Symphonic clock generator features an integrated MEMS resonator and provides the functionality of up to four discrete timing devices. This approach simplifies system design, reducing board space. An integrated temperature sensor delivers accurate information used by compensation algorithms to ensure superior stability. This enhances GPS accuracy and reduces lock time at the system level, facilitating more stable performance even under harsh environmental conditions.
“Ensuring that wireless and GPS protocol-dependent systems and services run reliably is essential for meeting the requirements of increasingly sophisticated wireless devices and use cases,” said Dave Altavilla, president and principal analyst at HotTech Vision and Analysis. “SiTime’s new clock generator is an example of how precision timing technology is a critical enabler of AI-first mobile experiences.”
Symphonic has a four-output clock generator that provides 76.8 MHz, 38.4 MHz, or 19.2 MHz from any output for baseband, RF, and GNSS applications. Its integrated MEMS resonator eliminates the need for an external resonator, providing a smaller, single-chip footprint that occupies only 2.22 mm² of area. An integrated high-precision temperature-to-digital converter (TDC) with a single-wire Universal Asynchronous Receiver/Transmitter (UART) interface for system-level temperature compensation ensures frequency stability as low as ±0.5ppm. Multiple output-enable pins can turn clock outputs on and off for system power optimisation and electromagnetic interference (EMI) reduction.
The mobile clock generator operates over -30°C to +90°C, with wider ranges available on request. It delivers superior performance and dynamic stability under airflow and thermal shock.
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