New Digitally Controlled MEMS Oscillator Enables 25% Faster Wireless Charging and Delivers up to 90% Area Reduction

SiTime corporation has introduced the SiT3901 µPower digitally controlled MEMS oscillator that improves wireless charging speed by up to 25% while reducing the overall timing solution area by up to 90% and is ideal for wireless charging systems for smartwatches, activity trackers, hearing aids, and wearables. This new DCXO targeting power-sensitive and space-constrained mobile and IoT applications offer high resilience to analog noise and stability over temperature of ±50 and ±100 ppm.

Features

• Wide tuning range via 1-wire serial interface

• Up to ±150,000 ppm pull range

• Tuning resolution as low as ±1 ppb

• Enables the oscillator frequency of the TX to dynamically match the resonate frequency of the RX

• Eliminates many external passive components needed for traditional resonate matching

• Ultra-low power: 105 µA (typical)

• Extended battery life

• Small size: 1.5 x 0.8 mm

• Up to 90% smaller total footprint compared to quartz solutions

• Programmable output drive strength for best EMI or driving multiple loads

• BOM savings

• Space savings

Applications

• Wireless charging

• Wearables

• Portable medical devices

• Earbuds

• Hearables