SIT9005ACU1G-25SG

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Programmable oscillators are versatile signal sources for a wide range of applications that require an adjustable frequency signal. The SIT9005ACU1G-25SG from SiTime is a low-cost programmable oscillator that features a wide tuning range of up to ±25pF, high power supply rejection ratio, frequency stability over voltage and temperature variations, fast switching times, and programmable low-power and high-power modes. It is suitable for applications such as frequency synthesis, signal conditioning, and precision timing. In this article, we will discuss the application field and working principle of SiTime’s SIT9005ACU1G-25SG programmable oscillator.

The SIT9005ACU1G-25SG is designed for use in frequency synthesis, signal conditioning, and precision timing applications. It has a wide tuning range of up to ±25pF, which allows it to be used in applications that require fine-tuning of the oscillation frequency. The oscillator’s high power supply rejection ratio ensures excellent stability of the signal even when the input voltage fluctuates. Its fast switching times make it ideal for applications where the signal needs to be changed rapidly. The oscillator also features programmable low-power and high-power modes, which enable it to operate in a variety of power-saving and performance-enhancing scenarios.

The SIT9005ACU1G-25SG is a crystal-based oscillator that uses a quartz crystal as the oscillator element. The crystal can be programmed to an accurate frequency by monitoring the resonant frequency of the crystal and fine-tuning the frequency with the onboard tuning capacitor. The communication of the tuning capacitor is done through a triple-level control interface, which consists of a control signal, an enable signal, and a data signal. The control signal instructs the capacitor to either increase or decrease the capacitance, while the enable signal enables the programming of the capacitor. The data signal allows the capacitor to be programmed to a specific capacitance value. This allows for precise tuning of the oscillator frequency.

The SIT9005ACU1G-25SG also features a programmable low-power and high-power mode. In low-power mode, the oscillator consumes less power and is suitable for applications that require low-power consumption. In high-power mode, the oscillator operates at a higher frequency with higher power consumption and is ideal for applications that require faster switching times and higher switching frequency. In both modes, the frequency stability is maintained over wide temperature and voltage variations.

The SIT9005ACU1G-25SG is a low-cost, versatile, and reliable programmable oscillator that is suitable for a wide range of frequency synthesis, signal conditioning, and precision timing applications. Its wide tuning range, high power supply rejection ratio, fast switching times, and programmable low-power and high-power modes make it an ideal choice for a variety of applications. Furthermore, its high frequency stability over wide temperature and voltage variations helps ensure that the oscillator\'s output is reliable and accurate.

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