SIT1602BC-71-25E-32.768000D

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Packaging:	Tape & Reel (TR)
Part Status:	Active

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Oscillators

Oscillators are electronic circuits that generate a continuous or periodic electrical signal. Oscillators are used in many applications including computer clock circuits, control systems, radio and television systems, sonar and radar systems, and power supplies. One type of oscillator is the SIT1602BC-71-25E-32.768000D. This device is a temperature compensated crystal oscillator (TCXO) designed for use in a wide variety of applications requiring precision frequency control and excellent temperature stability.

Application Field

The SIT1602BC-71-25E-32.768000D is used in a range of applications including telecommunications, computer peripherals, automotive, and process control. In these applications, it is used to provide a reliable and accurate frequency reference for control systems and as a master clock for microprocessors and digital signal processors (DSP). This device is also commonly used in portable radios, automotive and process control applications and consumer electronic products.

Working Principle

The SIT1602BC-71-25E-32.768000D utilizes a quartz crystal oscillator that is temperature-compensated. The temperature-compensated crystal oscillator (TCXO) is a component that maintains a fixed frequency over a wide temperature range. This is accomplished by using a temperature-sensing element, such as a thermistor, which provides feedback to the crystal oscillator to adjust its frequency in compensation for temperature variation.The TCXO utilizes a quartz crystal that has a very low temperature coefficient of frequency (TCF). This low TCF assures the frequency accuracy and stability necessary for many modern systems including cellular phones, GPS navigation systems, and high-speed digital communications.The TCXO also uses a reference resistor that is used to provide a current that provides the necessary feedback to the crystal to maintain a desired frequency. The current is adjusted throughout the temperature range using an oscillator temperature compensation circuit. This circuit takes the current generated by the reference resistor and feeds it to the crystal oscillator circuit. The circuit also adjusts the current amplitude to compensate for temperature variations.To test the convergence of the control loop of the SIT1602BC-71-25E-32.768000D, a frequency counter is used to measure the actual frequency deviation of the device under temperature variation. Since the actual frequency deviation is within +/- 0.5ppm, this assures there is very good convergence within the control loop.

Conclusion

In summary, the SIT1602BC-71-25E-32.768000D is a temperature-compensated crystal oscillator (TCXO) designed for use in a wide variety of applications requiring precision frequency control and excellent temperature stability. The low temperature coefficient of frequency ensures accurate frequency control over a wide temperature range and the temperature compensation circuitry ensures the desired frequency is maintained, even during large temperature variations. The frequency accuracy and stability of the TCXO make it an ideal choice for telecommunications, computer peripherals, automotive, and process control applications.

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