Product spotlight: SiT1811 delivers stability at low power and small footprint

To keep applications running smoothly, the timing components that are responsible for data synchronisation must keep pace with more stringent demands in consumer applications: lower power, smaller footprint, and greater stability. The SiT1811 oscillator (XO) delivers advantages for the rigorous demands of these applications. In fact, among competing 32.768kHz devices, SiT1811 XOs deliver the lowest power available in the smallest quad flat no-lead (QFN) footprint to extend the reliability of consumer products.

Hiten Dalal, Sr. Product Line Manager, SiTime further explores.

Consumer application design requirements

Interconnected consumer technology – especially battery-operated devices – is fast becoming mainstream in our lives. Wireless operation for extended periods of time, especially during sleep modes can be paramount for product success. For example, when you lift your arm and see the time, your smart watch fulfills a function. When you put the watch away in the drawer or on your nightstand, it goes to sleep, drawing less power to preserve battery life. But even while your watch is asleep, it still must keep accurate time for the next time you need it. There is a lengthy list of consumer applications in addition to smart watches that have rigorous size, power, and reliability demands: gaming controllers, smart phones, smart wearables, hearables, smart tags, and much more.

The SiT1811 ultra-low-power, low-jitter, 32.768kHz oscillator

The SiT1811 XO: the advantage for consumer applications

For some consumer applications a resonator might be enough, but for demanding applications that require an XO, the SiT1811 XO is ideal. Designed to operate at 32.768kHz, the SiT1811 operates at half the power of competing 32kHz oscillators. SiTime XOs also has high reliability with a mean time before failure (MTBF) of over 2 billion hours. All these SiT1811 XO benefits enable high-volume, consumer products that require ultra-low power and reliability in a small package.

As electronics become smaller and denser, semiconductor devices also need to shrink. With legacy quartz device alternatives, a decrease in signal frequency results in increased resonator size. Because the resonators in SiTime oscillators are manufactured with silicon MEMS technology, they are extremely small and can be housed using the latest semiconductor packaging techniques to keep size down. In fact, SiTime MEMS technology enables the SiT1811 XO to fit in a tiny 1211 QFN package that is 30% smaller than competing products.

Putting it all together, SiT1811 XOs give you increased stability with the lowest power and lowest footprint available in 32.768kHz to extend the battery life for your consumer product.

Key features of the SiT1811 oscillator family include:

• Ultra-low power XO with 510 nA current (<0.6 µW typical power consumption)
• Low integrated phase jitter (IPJ): 3 ns RMS ±20 ppm frequency stability
• Operating temperature range from -10 to +85°C
• Best-in-class mechanical shock resistance at 20,000g
• Best-in-class vibration resistance at 100g
• Industry’s smallest 32.768kHz device in a QFN package: 1.2 x 1.1x 0.55mm (1.32mm2 footprint, 0.67mm3 volume), 30% smaller than leading competitive oscillators QFN packages at this performance level
• RoHS and REACH compliant, Pb-free, halogen-free and antimony-free

SiT1811 XO for applications that demand precision timing

As technology continues to advance, precision timing is critical to reduce latency, increase battery life and ensure exceptional user experiences. The SiT1811 XO is low power, it delivers low integrated phase jitter andmaintains performance, even in harsh and noisy environments.

For consumer applications, it is time to rethink traditional solutions and design in timing components that will better optimise for size, power and stability. For more information, check out the SiT1811 datasheet. You can purchase SiT1811 XO at SiTime Direct.