ECX-L25BN-32.768

Oscillators

Oscillators are circuits that generate periodic, oscillating electronic signals. They are an essential building block in electronic systems, used to create timing signals and clocks which control and monitor operations, or to output a carrier wave for modulating another signal. This article focuses on the ECX-L25BN-32.768 oscillator, outlining its application fields and working principle.

Application Fields

The ECX-L25BN-32.768 is an oscillator from the ECX-L series. ECX-L series oscillators are small, surface-mounted, low power consumption devices, making them very suitable for use in portable, battery powered products such as mobile phones and medical equipment. Their accuracy over temperature also makes them a viable choice for timing in system level applications, like automotive systems and industrial automation.

Additionally, due to their low power consumption and high reliability, ECX-L oscillators are an ideal choice for watches and clocks. The ECX-L25BN-32.768 in particular is known for its high accuracy and stability over temperature, nominal frequency of 32.768kHz, and CMOS output type. Its low power consumption of 0.2mA max makes it a possible choice for use as the timekeeper for portable products.

Working Principle

The working principle of the ECX-L25BN-32.768 is based on the quartz crystal’s piezoelectric effect. Quartz is mechanically vibrated by a circuit which transforms electric signals into mechanical vibrations. This is done with the use of an oscillation circuit which consists of an amplifier, a quartz crystal resonator, a capacitive feedback external capacitor, and an inductor.

The quartz crystal, which vibrates when given an electric signal, acts as an electrical resonator, storing the electric energy and releasing it periodically. This causes it to vibrate and form a mechanical resonance. The vibrating crystal changes its tuning frequency through the applied electrical signal, which is controlled by the external capacitor.

The inductor and capacitor form an LC resonance circuit which controls the frequency of the oscillator. When the circuit reaches its desired frequency, the oscillator stabilizes and continues to output the references signal at the same frequency. The size and temperature range of the quartz crystal affect the frequency of the oscillator, so for the ECX-L25BN-32.768, a high accuracy 10.0 MHz ±30ppm AT-cut quartz crystal is used.

Conclusion

The ECX-L25BN-32.768 oscillator is a small, low power consumption device with a high accuracy reference frequency, making it ideal for use in system level applications and in portable products. Its working principle is based on the quartz crystal’s piezoelectric effect, forming a resonant LC circuit which then stabilizes to output the reference frequency.