SIT8208AC-22-25E-19.440000T

Oscillators

Oscillators are elements in electronics that generate an output signal at precise and stable frequency. SIT8208AC-22-25E-19.440000T is one of them.

Application Field of SIT8208AC-22-25E-19.440000T

SIT8208AC-22-25E-19.440000T, a low-voltage quartz oscillator, features a very low consumption current of 11.7μA max and 0.9V~3.6V power consumption voltage. It mainly suits for low temperature requirement applications, such as in smart home applications, smart meters, medical electronics, and embedded systems, toys and other applications needing low-power and low-voltage circuitry.

Working Principle of SIT8208AC-22-25E-19.440000T

Quartz crystals are very commonly used as the oscillator frequency determining element. The crystal has the property of producing a voltage when it is stretched or compressed. An external circuit is connected to the crystal to produce a resonant circuit at the natural frequency of the crystal. This circuit will oscillate and a voltage waveform is generated at the specified frequency. The quartz oscillator of SIT8208AC-22-25E-19.440000T is composed of the quartz crystal, capacitor, resistor, and amplifier.

The quartz crystal is placed between two electrodes. When an AC voltage is applied across the electrodes, a current will flow through the crystal. The interior of the crystal is cut with regularly spaced etched grooves to further reduce the impedance between the electrodes and the crystal. The crystal then produces a voltage output that has a frequency equivalent to its inherent mechanical resonant frequency and these signals are sent to the amplifier.

The amplifier, usually an operational amplifier, amplifies the signal. The resistance of the crystal in combination with the two external capacitors form a Colpitts oscillator, which is a type of LC oscillator. The external capacitor and resistor create a feedback loop that maintains the oscillation of the crystal. In the case of the SIT8208AC-22-25E-19.440000T, the frequency range is 19.440000MHZ with 0.9V~3.6V power supply voltage.

Conclusion

SIT8208AC-22-25E-19.440000T is a low-voltage quartz oscillator used for low temperature applications requiring a precise and stable frequency. It is composed of the quartz crystal, capacitor, resistor, and amplifier, and works by forming an oscillator circuit with the external capacitors and resistor.