SI5351A-B07884-GM

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The SI5351A-B07884-GM is a field-programmable PLL-based clock generator IC designed for use in a wide range of industrial, consumer, communications and computing applications. It is capable of providing a single output of up to 8MHz, or a multiple of up to 8MHz from a single input frequency. It offers extremely low power consumption, high accuracy and jitter over temperature, small size and minimal external components.

The SI5351A-B07884-GM is an advantageous clock generator solution for applications where a higher degree of flexibility and low power consumption from a small size is needed. The IC can be configured to a variety of solutions, such as in applications where a combination of complex clock signals are needed. It can also be used in applications where multiple frequency generation is required.

The SI5351A-B07884-GM can output two independent clock signals with a frequency range of 45-180 MHz. Each signal can be phase-adjusted, and the total frequency range of both signals can be independently configured. The phase-adjustments can range from 0 to 359 degrees, with resolution of 0.1 degrees. Additionally, the frequency can be divided using the integer divider feature of the IC.

The IC also features a wide range of programmable features such as: clock disable, clock signal output purpose, drive strength, output enable, spread spectrum, and clock signal type. The 3.3V version of the SI5351A-B07884-GM offers an I/O voltage range of 0.8V to 3.3V, while the 5V version of the IC offers an I/O voltage range of 1.2V to 5V.

On the core level, the SI5351A-B07884-GM’s working principle relies on a phase-locked loop (PLL) with a voltage-controlled oscillator (VCO). A voltage-controlled oscillator is essentially a type of oscillator that is designed to be able to be tuned or adjusted dynamically, or with an external control voltage. A phase-locked loop is a combination of several components, namely an oscillator, a phase detector, a low-pass filter and a voltage-controlled oscillator, all of which work together to maintain a fixed phase relationship between the input and output signals.

The phase detector examines the phase difference between the input and output signals, and the low-pass filter removes any signals associated with frequencies above the loop bandwidth. The VCO output is then adjusted until the phase difference between the input and output signals has converged. The SI5351A-B07884-GM PLLs use a two stage VCO design. The core loop and power down sections employ a low impedance high power current source technology which provides high linearity and low spurs.

The SI5351A-B07884-GM is ideal for use as an industrial clock generator and is an attractive solution for applications that require low power, high accuracy, and low jitter. The clock generator performance is further improved through the implementation of on-chip digital and analog filtering and averaging. The flexible architecture, low power operation and the ability to generate multiple clock signals and frequencies from a single input frequency makes the SI5351A-B07884-GM an ideal clock generator solution for a wide range of applications.

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