AX7DCF1-460.8000T

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Oscillators

The AX7DCF1-460.8000T oscillators are microelectromechanical system (MEMs) based quartz crystals, also known as MEMcrystals. Oscillators are electrical circuits designed to generate a regular series of electrical pulses, over a range of frequencies. Oscillators are used to stabilize voltage levels, power conversion, logic design, and signal conditioning.

Application Field

AX7DCF1-460.8000T oscillators are widely used in a variety of applications due to their high frequency stability, low power consumption, and broad frequency range. Quartz crystal oscillators are used in telecommunications, aerospace, navigation, and medical instrumentation. They are also used as clock generators in computers and digital electronics.

Working Principle

Quartz crystal oscillators can be broken down into two parts: the resonator and the oscillator circuit. The resonator is the quartz crystal, which has a natural frequency that determines the frequency of the oscillator circuit. The oscillator circuit is designed to provide a voltage gain to the resonator, and to provide the phase and frequency feedback to keep the oscillator in oscillation. This closed-loop oscillator circuit is the key to the stable oscillation frequency of the quartz crystal oscillator.

The oscillator circuit contains a frequency-determining component, usually a capacitor or an inductor. The frequency of oscillation is determined by the capacitance and/or inductance of the frequency-determining components, and by the Quartz crystal\'s properties.When voltage is applied, current flows through the Quartz crystal. When the current reaches its natural frequency, the Quartz crystal starts vibrating. The vibrations of the crystal cause a phase shift in the voltage waveform, which in turn produces a higher frequency output.

The frequency of the quartz crystal oscillator is very stable because the resonator’s characteristics are very well-known and can be adjusted if necessary. Also, because of its small size and low power consumption, quartz crystal oscillators can be used in many portable or battery-operated electronics.

Advantages

Quartz crystal oscillators are preferred because of their small size relative to mechanical oscillators and their superior temperature stability. Quartz crystals are also used in instruments that require long-term stability and accuracy, such as atomic clocks and seismic monitors. Quartz crystal oscillators also have excellent storage-temperature stability, low drive requirement, low-phase noise, and low cross-talk.

In addition, quartz crystal oscillators are relatively inexpensive and easy to use. Because they generate a stable frequency without requiring calibration, quartz crystal oscillators are widely used in telecom applications.

Disadvantages

Quartz crystal oscillators require a certain amount of power to sustain oscillation. This is called “drive level.” If power is insufficient, the oscillator will not oscillate. Also, quartz crystal oscillators are sensitive to vibration, shock, and temperature changes, so they must be handled carefully.

Quartz crystal oscillators also have limited frequency ranges and are not suitable for very low or very high frequency applications. The frequency stability of quartz crystal oscillators also decreases with increased temperature.

Conclusion

The AX7DCF1-460.8000T oscillator is a quartz crystal oscillator with a wide range of applications due to its stability, accuracy, and low power consumption. The oscillator is based on a quartz crystal resonator and a closed-loop oscillator circuit to generate a stable frequency output. It offers many advantages such as small size and low power consumption, excellent storage-temperature stability, and low drive requirement.

However, quartz crystal oscillators also have some disadvantages such as limited frequency ranges, sensitivity to vibration, shock, and temperature variations, and decreasing frequency stability with increased temperatures. Even with these drawbacks, quartz crystal oscillators remain popular due to their low cost and easy usage.

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