Spread-spectrum oscillators simplify achieving emissions compliance

September 21, 2017 //By Graham Prophet
Spread-spectrum oscillators simplify achieving emissions compliance
SiTime’s (Santa Clara, California) SiT9005 spread spectrum oscillator (SSXO) is a field-programmable device that can speed development by ensuring emissions compliance, providing up to 30 dB reduction in EMI.

The SiT9005 SSXO offers two techniques for compliance: spread spectrum clocking and rise/fall time adjustment of the clock signal. The chip is supported on SiTime’s Time Machine II programmer, which allows engineers to quickly reduce emissions levels. The IC is designed for a range of industrial and consumer applications such as IP cameras, industrial motors, multi-function printers, tablets, flat panel devices, and other electronic products required to meet compliance standards. Features include;

- Up to 17 dB EMI reduction on carrier frequency and 30 dB on harmonics

- 28 spread spectrum options

- Centre spread from ±0.125 to ±2.0% with ±0.125% resolution

- Down spread from -0.25% to -4.0% with -0.25% resolution

- Eight FlexEdge configurable rise/fall time options

- 0.25 nsec to 40 nsec slew rates

- Triangular or “Hershey Kiss” spread profile

- Best cycle-to-cycle period jitter at <15 psec (picosecond), for clocking high-speed chips

- 1 to 141 MHz frequency range

- 0.2 µA, lowest standby current consumption for battery-powered systems

- Three industry-standard footprints for 100% drop-in replacement: 2.0 x 1.6 mm (industry’s smallest SSXO), 2.5 x 2.0 mm, or 3.2 x 2.5 mm

- -40 to +85°C operating temperature range, for industrial applications

- ±20 ppm frequency stability

- LVCMOS output

- Highest reliability and resilience

30 times higher shock and vibration resistance

30 times higher reliability at 1 billion hours MTBF


Sitime; www.sitime.com/products/spread-spectrum/sit9005



Vous êtes certain ?

Si vous désactivez les cookies, vous ne pouvez plus naviguer sur le site.

Vous allez être rediriger vers Google.