SiT5721 Overview
Description
The SiT5721 is the industry’s first digitally controlled OCXO (DCOCXO), enabling output frequency tuning via I2C interface with ±5 ppt (±0.005 ppb) resolution. The device delivers ±5 ppb over-temp stability, ±0.04 ppb/°C frequency slope (dF/dT) and Stratum 3E compliance in the smallest 9 mm x 7 mm package.
Key Features
- Any frequency between 1 MHz and 60 MHz, in 1 Hz steps
- ±0.04 ppb/°C frequency slope typical (dF/dT)
- ±5 ppb frequency stability over temperature
- Up to 85°C operating temperature range
- 1.4E-11 ADEV at 10 second averaging time
- Digital frequency pulling via I2C Up to ±10 ppm pull range ±5 ppt pulling resolution
- Exceptional dynamic stability under airflow and rapid temperature changes
- Excellent holdover over a wide range of conditions
- Integrated regulators for on-chip power-supply noise filtering and excellent PSRR
- GR-1244 Stratum 3E compliant
