520M25DT16M3680

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Oscillators

An oscillator is a device, component or system that creates an electrical signal or waveform that sustains itself and repeats at a steady, precise frequency. Most oscillators can be broadly divided into two classes: phase-coherent oscillators and ordinary oscillators. Phase-coherent oscillators, also called synchronous or phase-locked oscillators, can be locked to a reference signal, such as a master clock or frequency standard.

The 520M25DT16M3680 oscillator is a stable, low-power oscillator used for precise frequency control in communication, navigation, and industrial control applications. It is designed to operate in either static (e.g., crystal) or dynamic (e.g., ceramic resonator) mode. The 520M25DT16M3680 oscillator offers the following features:

• High stability of up to ±50 ppm (12 h/day) at -40°C to +105°C over wide voltage ranges
• Programmable output frequency range from 0.1 Hz up to 20 MHz
• Low jitter (max 0.5 to 1.0 ps rms)
• Wide frequency range and range selectability
• Small package size ranging from 38-pad LGA to 58-pad LGA

The 520M25DT16M3680 oscillator is suitable for a wide range of applications such as local area networks, telecommunications bases stations, video and graphics systems, set-top boxes, routers, and general-purpose embedded applications.

Working Principle

At the heart of the 520M25DT16M3680 oscillator is a phase-locked loop (PLL) that consists of a voltage-controlled oscillator (VCO), a reference oscillator, and a digital phase detector. The VCO is the core of the device, providing a sharp frequency response and low jitter. The reference oscillator is used to set the target frequency, and the digital phase detector ensures that the VCO frequency is precisely locked to the reference frequency.

The PLL loop is tuned through the application of an external voltage or digital control. The voltage-controlled frequency is determined by a combination of the resistance and capacitance of the PLL components, as well as the voltage applied. Once the loop is tuned, the VCO will output a continuous signal at the precise frequency of the input reference.

Analog temperature compensation circuitry is used to compensate for the effects of temperature on the oscillator\'s PLL components, ensuring that the desired frequency output is maintained over the temperature range specified by the manufacturer.

Conclusion

The 520M25DT16M3680 oscillator is a precision, low-power oscillator suitable for a variety of applications. It offers high stability at a wide temperature range and low jitter and is available in a variety of package sizes. The oscillator is based on a phase-locked loop and operates by applying an external voltage or digital control to tune the frequency of the VCO output. Temperature compensation circuitry ensures that the device can maintain its specified frequency output over a range of temperatures.

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