TA-74.250MDE-T

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Oscillators

An oscillator is a device or system that generates or produces periodic signals, such as an alternating current, or a waveform. Oscillators have uses in a wide range of applications, from telecommunication to timekeeping, to sound synthesis and audio production. In this article, we will look at the TA-74.250MDE-T oscillator, and its application field and working principle.

TA-74.250MDE-T Oscillator

The TA-74.250MDE-T oscillator is an ultra low power silicon MEMS oscillator with a low package profile, longevity and temperature stability advantages over existing oscillator technologies. The device utilizes MEMS (Micro-Electro-Mechanical System) technology, which uses microscopic suspended silicon structures and dynamic comb drives to generate the output frequency signals instead of ceramic or quartz crystals, so that power consumption is significantly reduced while maintaining the wide frequency range and the temperature stability. In addition, the device is also designed to deliver excellent long-term frequency stability over the extended temperature range.

Application Field and Working Principle

The TA-74.250MDE-T oscillator has a wide frequency range between 5.3K and 52MHz, making it suitable for a variety of applications, including frequency synthesis, jitter attenuation, timing, network communications, medical devices, consumer electronics, and automotive electronics. Its excellent clock performance and low power consumption make it a good choice for applications where minimization of size, cost, and power are critical.

The TA-74.250MDE-T oscillator works on the principle of comb drive actuation. In this setup, two comb structures made up of fixed and movable (flexing) cantilevers are used. The chip’s output frequency is generated by the comb drive actuators which use electrostatic attraction as the primary mechanism to generate the output frequency. The main elements of the oscillator are the fixed comb, the movable comb, the power source, and the frequency control circuit.

When an electric field is applied to the flexible cantilever, it is moved up and down by electrostatic forces generated by the fixed comb. The other end of the cantilever is connected to a counterweight that is driven by an external power source such as an AC supply. The oscillator starts oscillating when the AC waveform causes the counterweight to move back and forth in a reverberating motion.

The frequency of the oscillator is controlled by the frequency control circuit, which consists of a capacitor and a variable resistor connected in series. By adjusting the resistance of the variable resistor, it is possible to adjust the oscillator’s frequency. The frequency of the oscillator can also be controlled by changing the capacitance of the capacitor.

The TA-74.250MDE-T oscillator is designed to operate over a wide temperature, vibration, and shock ranges. It has a standard accuracy of ±100ppm over 0 to 70 degrees Celsius. It is also designed to consume very low power, enabling it to be used in battery powered applications.

Conclusion

In conclusion, the TA-74.250MDE-T is an ultra low power silicon MEMS oscillator that offers excellent frequency stability and wide temperature, vibration, and shock range. It is suitable for a variety of applications, including frequency synthesis, jitter attenuation, timing, network communications, medical devices, consumer electronics, and automotive electronics. By adjusting the resistor and the capacitor, it is possible to adjust the frequency of the oscillator. In addition, the low power consumption of the device makes it an ideal choice for battery-powered applications.

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