532FB000112DG

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Pin Configurable/Selectable Oscillators

Modern oscillators allow engineers to quickly select a frequency of oscillation using external pins. 532FB000112DG is an example of a pin configurable/selectable oscillator which allows the user to use pin connections to set the frequency of the oscillation. This device includes the features reserved for higher end oscillators such as a frequency stability, frequency accuracy and temperature stability. This paper takes an in-depth look into the 532FB000112DG application field and its underlying working principle

Application Field of 532FB000112DG

The 532FB000112DG is a fully programmable oscillator, meaning the user can select the frequency of operation simply by adjusting the value of two external pin connections. The oscillator’s frequency is determined by the ratio of resistors and capacitors connected to the two pins. This makes the oscillator suitable for applications that need frequent and rapid frequency selections such as robotics and automotive. Other applications include:

• Communication systems
• Medical devices
• Audio systems
• LoRa and IoT applications
• Military and aerospace

The 532FB000112DG is also suitable for high stability time-keeping applications. This is because the oscillator has a frequency stability of ±3.0ppm and a frequency accuracy of ±50ppm over a temperature range of -40℃ to 125℃. This means that its output frequency is highly stable and predictable, making it suitable fortime critical applications.

Working Principle of 532FB000112DG

The operation of the 532FB000112DG is based on the principles of the Pierce oscillator circuit. This circuit consists of two main parts,a transistor with a gain equal to one, and a feedback resistive-capacitive (RC) network. The function of the RC network is to provide negative feedback for the transistor which helps determine the frequency of oscillation.

When the transistor is at rest, the energization from the power supply charges the capacitor in the RC network. This induces a voltage across the resistor in the network causing current to flow through the collector-base junction of the transistor. The current triggers an oscillation (due to the fact that the gain of the transistor is equal to one) which in turn causes energy to flow between the emitter and collector terminals. This energy flows alternatively between the emitter and collector, causing a sine wave to be generated.

The frequency at which the oscillation occurs and the shape of the sine wave is determined by the RC time constant which is set by adjusting the external pins. This means that the user can quickly and easily select and adjust the oscillation frequency of the FB000112DG oscillator simply by adjusting the ratio of resistors and capacitors attached to the two pins.

Conclusion

The 532FB000112DG is an example of a pin configurable/selectable oscillator which allows the user to select the frequency of oscillation by adjusting the resistance and capacitance of two external pins. This device is suitable for a variety of applications such as communication systems, medical devices, audio systems, LoRa and IoT applications, military and aerospace, and time-keeping applications. The oscillator is also highly accurate and stable, making it suitable for time-critical applications. The operation of the oscillator is based on the principles of a Pierce oscillator circuit and its frequency is determined by the RC time constant which is set by adjusting the external pins.

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