SiT3521 Overview
The SiT3521 is an ultra-low jitter, user programmable oscillator which offers the system designer great flexibility and functionality. The device supports two in-system programming options after powering up at a default, factory programmed startup frequency: ◼ Any-frequency mode where the clock output can be re-programmed to any frequency between 1 MHz and 340 MHz in 1 Hz steps ◼ Digitally controlled oscillator...
SiT3521 Key Features
- Programmable frequencies (factory or via I2C/SPI) from 1 MHz to 340 MHz
- Digital frequency pulling (DCO) via I2C/SPI
- Output frequency pulling with perfect pull linearity
- 13 programmable pull range options to ±3200 ppm
- Frequency pull resolution as low as 5 ppt (0.005 ppb)
- 0.21 ps typical integrated phase jitter (12 kHz to 20 MHz)
- Integrated LDO for on-chip power supply noise filtering
- 0.02 ps/mV PSNR
- 40°C to 105°C operating temperature
- LVPECL, LVDS, or HCSL outputs
SiT3521 Applications
- Output frequency pulling with perfect pull linearity
- 13 programmable pull range options to ±3200 ppm