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Oscillators

XLL536001.163000X application field and working principle

XLL536001.163000X are fully integrated closed loop oscillators in a compact 4 mm x 3 mm leadless package which has the industry\'s smallest LGA footprint. It incorporates a 32kHz quartz crystal, an amplifier, and an IF circuit into one chip. Typically, the oscillating frequency is 32.768 kHz with a tolerance of +/-2.5 ppm.

Application fields

XLL536001.163000X are typically used for applications such as capturing timing and billing data, creating measurement intervals for control systems, writing timestamp functions and serving functions for various components. It can also be employed in watches, home appliances, industrial control, health care products and mobile terminal products.

Working principle

The XLL536001.163000X employs a quartz crystal structure as its oscillator. It acts as a resonator and the amplitude of its two vibrating points determines the frequency of vibrations. The resonator\'s resonance frequency is calculated by the equation f₀=1/2π√(1/L×C), where L and C are the equivalent inductance and capacitance of the quartz crystal. The frequency determined by this equation is referred to as the "resonance frequency" of the quartz crystal.

As quartz crystals have a relatively large variation in their actual resonant frequencies, XLL536001.163000X incorporates a temperature compensation circuit. This circuit detects the changes in temperature and adjusts the oscillator output frequency accordingly to ensure precision operation within the precision range of the device.

The XLL536001.163000X also includes a semi-analogue circuit. This semi-analogue circuit includes an amplifier, an integrator circuit, and a phase-gain feedback circuit. When this circuit receives the electrical signal of the quartz crystal resonator, it amplifies and filters the electrical signal before returning it back to the quartz crystal. This ensures that the oscillations of the quartz crystal remain stable and in line with the predetermined frequency.

The whole package of XLL536001.163000X is composed of the quartz crystal, the amplifier and the IF circuit, and can supply low power consumption and low electro-magnetic interference while maintaining good frequency stability. Thanks to its compact size, XLL536001.163000X is a highly desirable device for many applications.

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