SI5346A-C-GMR

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The SI5346A-C-GMR is a clock generator from Silicon Laboratories, offering exceptional signal quality and flexibility in timing applications. This device has a broad-input range and is capable of generating a wide range of frequencies in both integer and fractional configurations. It is also very low-power, which makes it suitable for many applications. In this article, we will explore the applications and working principle of the SI5346A-C-GMR.

Application Field

The SI5346A-C-GMR is a versatile clock generator that can be used in many applications. It is suitable for communications systems such as Ethernet, GTP, SONET/SDH, Fiber Channel, and Fibre Optic Networking (FON). It can also be used for general purpose applications such as video and audio processing, as well as for drivers of LED displays and liquid crystal displays (LCDs). It can also be used in embedded systems, instrumentation, data acquisition systems, and test equipment. Additionally, the high-frequency and low-power device can be used in ultra-low power and ultra-miniature designs.

Working Principle

The SI5346A-C-GMR is based on Silicon Laboratories’ third-generation clock generator architecture, which uses analog and digital phase-locked loop (PLL) circuitry to accurately generate frequencies. The analog PLL consists of a voltage-controlled oscillator (VCO) and charge-pump loop filter, and it is used to generate a high-frequency clock signal. The digital PLL is used to ensure that the clock signal is accurately aligned with the desired frequency, and is also used to reduce power consumption. Additionally, the device uses fractional-N synthesis to generate frequencies that are not multiples of the reference frequency.

In order to generate the clock signal, the device requires a reference signal. This signal can be provided by an internal low-frequency oscillator or an external reference signal, such as a quartz crystal oscillator or another clock source. Once the reference signal is applied, the SI5346A-C-GMR uses the VCO and PLL circuitry to generate the desired frequency, which is then sent to the output driver. The output driver is used to buffer the signal and provide it with a high-impedance supply.

Additionally, the SI5346A-C-GMR has an integrated digital-to-analog converter (DAC), which can be used to adjust the output frequency while the device is in operation. This is done by changing the voltage of the VCO, which is done by adjusting the DAC output. The device also has a wide range of input and output frequencies and power consumption levels, which allows it to be used in a variety of applications.

Conclusion

The SI5346A-C-GMR is a versatile clock generator that offers excellent signal quality, flexibility in timing applications, and low power consumption. It can be used in various applications, such as communications systems, general-purpose applications, embedded systems, instrumentation, data acquisition systems, and test equipment. The device consists of an analog PLL, a digital PLL, and a fractional-N synthesizer that is used to generate the output signal. Additionally, the device has an integrated DAC, which allows it to adjust the output frequency while it is in operation. Overall, the SI5346A-C-GMR is an excellent choice for a wide range of applications.

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