LP200F35IDT

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Today, crystals are key components of many electronic systems around us. LP200F35IDT, also known as a super low-jitter voltage-controlled temperature-compensated crystal oscillator (VCTCXO), is a type of crystal oscillator (XO) being widely used in various applications. This article will discuss the application field and working principle of the LP200F35IDT.

Application Fields of LP200F35IDT

LP200F35IDT can be used in broadband and microwave communications systems, satellite television, Cable TV, cellular base station systems, multi-channel radio (Bluetooth, Zigbee, CDMA and so on), PHS system, optical fiber communication system and other fields. The oscillator has very low temperature variation and is especially suitable for applications where temperature variance and low-jitter performance are particularly important. It can also be used in precision and ultra-precision clock pulse sources.

Working Principle of LP200F35IDT

LP200F35IDT is a perfect combination of crystal tuning and automated temperature compensation (ATC). The crystal tuning circuit is composed of a high-quality quartz crystal, two series resonating circuits and two shunt connected varactors. It is possible to achieve precise frequency control by selecting different Quartz crystals, varactors, capacitors and inductors. Since it has low temperature coefficient, it is also equipped with an ATC circuit to further reduce temperature-induced frequency deviation. With the combination of micro-controlled circuit and built-in oscillator, the unit is capable of automating frequency control.

The ATC circuit of LP200F35IDT is composed of both temperature-sensitive element and some reference resistors. Through operation of the temperature-sensitive elements and precision ratio measurement, the temperature gradient of the quartz crystal is compensated by outputting of the temperature-induced voltage which is further added to the voltage being applied to the quartz crystal. The outputted voltage thus minimizes the temperature drift of the oscillator.

Conclusion

LP200F35IDT, with its very low temperature variation and ATC applied, is the perfect choice for applications that require precision tuning and temperature compensation. In such applications, it helps to reduce the temperature drift and optimize the performance.

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