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RF DEVICES & TECHNOLOGIES

Enables 5G equipment to be deployed anywhere, in any environment: solves critical timing challenges for 5G infrastructure - sets new performance benchmarks – 20 times better – in the $1.5 billion telecom and networking timing market - Unprecedented ease-of-use and programmability reduces design complexity and accelerates time to revenue. 

SiTime today announced the Emerald Platform™, a revolutionary precision timing solution that solves critical timing challenges for 5G infrastructure equipment. With the Emerald Platform timing solutions, operators can deploy 5G equipment in harsh environments and reliably offer mission critical services.

“Timing is potentially the single biggest point of failure in 5G systems and can impact performance, reliability and revenue. 5G timing is complex, and requires a new approach beyond traditional, component-level methods. SiTime took a systems approach to deliver Emerald. We combined our revolutionary MEMS with programmable analog, innovative packaging and high-performance algorithms to deliver a solution that is up to 20 times better than legacy timing components,” said Rajesh Vashist, CEO of SiTime.

SiTime’s Emerald Platform consists of the first MEMS oven controlled oscillators (OCXOs) in the industry. OCXOs offer the pinnacle of performance in timing and are critical to the reliable operation of all communications networks. However, legacy quartz-based OCXOs are extremely sensitive to environmental stressors such as vibration, temperature changes and shock, which can degrade network performance, reduce uptime, and impact mission-critical services such as automated driver assistance systems (ADAS). SiTime’s Emerald Platform OCXOs solve these problems.

“As mobile operators move into 5G and edge computing, they will require much tighter time synchronization in the radio equipment, which necessitates the use of an OCXO. Prior to 5G, this OCXO was deployed in a well-controlled environment. Now, the computing, core network, and radio will be collapsed into a system that may be deployed in an uncontrolled environment such as a tower, rooftop, and lamppost. In this environment, the OCXO will be exposed to vibration and temperature extremes,” explained Joe Madden, Principal Analyst at Mobile Experts Inc. “This change in deployment architecture requires new thinking and an evaluation of the benefits of MEMS and quartz timing technologies.”

“Our unique systems expertise is driving SiTime’s success in 200 applications at 10,000 customers,” continued Vashist. “For example, we uniquely deliver programmability, which ensures 100% availability of our solutions with short lead times. Fully automated manufacturing ensures on-time delivery with the highest quality. Last, but not the least, our innovative temperature compensation algorithms extract the maximum performance from our MEMS and analog, and ensure that 5G equipment can be deployed anywhere, in any environment. Looking forward, we will continue to use our systems expertise to expand our leadership in the $1.5 billion networking and telecommunications timing market.”

Solving the usability challenges of Quartz OCXOs
Because of the sensitivity of legacy quartz OCXOs, customers have to take many precautions to ensure reliable operation. A key challenge is the board placement of the OCXO, which needs to be located far away from stressors such as heat and airflow-induced thermal shock. This results in increased routing complexity and potential signal integrity problems. Designers have also tried using specialized plastic OCXO covers for thermal isolation, which introduces additional manufacturing steps and production complexity. Emerald MEMS OCXOs eliminate all of these problems; they simplify design, reduce development time, accelerate revenue, while improving system performance.

Flexibility through programmability
Legacy quartz OCXOs are custom built, from the ground up. There are severe limitations on the availability of features, such as frequencies, output types, operating temperature, and in-system control. SiTime’s Emerald Platform MEMS OCXOs do not have these limitations. Using a programmable analog architecture, the Emerald OCXO offers any frequency between 1 and 220 MHz, ensuring that the customer can select the optimal frequency for their application. The device also offers two output types, LVCMOS and clipped sine-wave, for optimal board performance. In the near future, the Emerald OCXO will also offer extended temperature operation (-40 to +95C, -40 to +105C) and an I2C serial interface for in-system programmability.

Key Specifications for Emerald Platform SiT5711 and SiT5712
All comparisons are with quartz-based Stratum 3E OCXOs

  • 10 times better performance than quartz Stratum 3E OCXOs in the presence of airflow and thermal shock: ΔF/ΔT dynamic stability: +/-50 ppt/C typical (ppt = parts per trillion) - Allan deviation (ADEV): 2e-11 under airflow
  • Unmatched ease-of-use: 

No restrictions on PCB placement
No mechanical shielding is required for thermal isolation
On-chip regulators, no need for external LDOs or ferrite beads
Resistant to humidity

  • Size: 9 x 7 mm, 75% smaller. Adapter boards are available to match common OCXO footprints
  • Height of 6.5 mm, 40% thinner, eliminates obstruction in a chassis-based system
  • 20 times better vibration resistance, ideal for outdoor pole mounted equipment
  • Resistant to microphonic and/or board bending effects, ideal for large telecom PCBs
  • Supports -40 to +85°C temperature range today, -40 to +95°C and -40 to +105°C support available in the near future
  • The only programmable OCXO platform, supports any frequency up to 220 MHz and LVCMOS / clipped sine-wave outputs
  • Semiconductor-level quality and reliability, batch to batch consistency
  • No activity dips

Samples of the Emerald MEMS OCXO SiT5711/12 are available now for qualified customers. Production quantities will be available in Q2 2019 and stocked at catalog distributors such as Digi-Key and Mouser.

Source: www.sitime.com 

 

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