SIT9002AC-23N25DQ

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Programmable oscillators are commonly used in circuits to generate specific frequenciues, by specifying the design parameters. The SIT9002AC-23N25DQ device is one such programmable oscillator and is widely used in many types of electronic products.

Application

The SIT9002AC-23N25DQ is mainly used in mobile devices such as cell phones, short-range data links, and Bluetooth receivers and transmitters. It also has a wide range of other applications, including medical, communication and motor control. Due to its small size, low current consumption and fast switching time, it has been widely accepted in circuit designs and a variety of systems.

working principle

The SIT9002AC-23N25DQ consists of a quartz crystal resonator and a voltage-controlled oscillator. The frequency of the oscillation is determined by the quartz resonator, and the control voltage of the oscillator can be adjusted to modify the frequency.

The programmable oscillator also contains a sawtooth generator circuit, which is used to control the voltage-controlled oscillator. The sawtooth generator utilizes a precision resistor-capacitor (RC) circuit to generate a sawtooth waveform of predefined amplitude and width. This sawtooth waveform then drives the voltage-controlled oscillator to oscillate normally.

In addition, the oscillator also includes a trimming mechanism, which is used to fine-tune the output frequency. This can be done manually, using an external potentiometer, or through an analog or digital interface. The programmable oscillator also includes a frequency-locked loop (FLL) circuit that ensures the output frequency remains stable.

Conclusion

The SIT9002AC-23N25DQ programmable oscillator is popular in many types of mobile devices due to its low-current consumption and its ability to generate precise and stable frequencies. It also offers a range of features, such as trimming, sawtooth generator and FLL circuit, which make it suitable for a variety of applications.

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