SIT9002AI-33N18DT

Programmable Oscillators

SIT9002AI-33N18DT Application Field and Working Principle

Programmable Oscillators are oscillators which enables user to adjust its timing parameters and variables electronically. Its main purpose is to provide a versatile timing source and to be used as an internal clock of systems requiring several different control signals. The SIT9002AI-33N18DT falls under this category and is suitable for multiple applications.

Application Field

The SIT9002AI-33N18DT is used in various equipment requiring precise timing and clock source such as industrial controllers, air conditioning controllers, motor controls and many other applications. It is also suitable as an internal clock of systems that needs different types of control signals, as some of its features includes multi-settings for clock frequency and divisions for multiple frequencies.

Working Principle

The SIT9002AI-33N18DT is designed with the latest Phase-Locked Loop (PLL) technology. It contains an on-chip voltage-controlled oscillator (VCO) and a Phase/Frequency/Duty cycle-Detector (PFD). The main components of this PLL circuit include the VCO, phase comparator and the loop filter.

When the VCO range is adjustable, the phase comparator and the loop filter will take a reference frequency and tests the phase shift between the signal from the VCO and the reference frequency. The phase comparator will then compare the signal and check the phase shift. If any phase shift is observed, the loop filter will then adjust the VCO frequency.

The absolute stability of the output frequency of the SIT9002AI-33N18DT is ensured by the use of thermistor temperature compensation circuit. The thermistor will detect the temperature changes in the surrounding area, and the circuit is designed to make the frequency correspond to the temperature change. This way, any potential drifts in the output frequency due to temperature changes can be minimized.

Conclusion

In conclusion, the SIT9002AI-33N18DT is a programmable oscillator suitable for applications requiring precise timing and clock source. It is designed with the latest Phase-Locked Loop (PLL) technology, and the absolute stability of its output is ensured by the use of thermistor temperature compensation circuit. Therefore, the SIT9002AI-33N18DT is an ideal choice for a wide range of applications.