SI5351A-B05631-GTR

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The SI5351A-B05631-GTR is a Clock Generator, PLL, and Frequency Synthesizer from Silicon Laboratories, used for applications requiring precise sub-Hertz frequency synthesis. This device has a wide operating temperature range, low power consumption, and a simple 2-wire interface. It has programmable output frequencies, adjustable PLL Loop Bandwidth, and supports multiple supply voltages.

The SI5351A-B05631-GTR is ideal for embedded systems, communications applications, precision timing, and general purpose clock generation. It supports a frequency range of 120kHz to 250MHz, a variety of output waveforms, and can simultaneously generate four different clock outputs. It features programmable output frequency dividers, an onboard 25MHz crystal oscillator, and two control pins selectable either as digital I/O or PWM outputs.

Applications

The SI5351A-B05631-GTR is well-suited for applications requiring high precision clock generation, including:

• Precision timing applications
• Communications systems
• Synchronous Ethernet
• IEEE 1588 synchronization
• Industrial networks
• Sampling systems
• Frequency synthesizers
• Portable digital devices
• Wireless digital devices
• Test and measurement equipment
• SW/HW development tools

Working Principle

The SI5351A-B05631-GTR utilizes a Programmable Interpolator and a Phase Locked Loop (PLL) to generate the desired output frequency. A digital signal is sent to the Programmable Interpolator, which multiplies the input frequency to the desired output frequency. The PLL then locks the output frequency to the input frequency, allowing for highly precise frequency synthesis. The PLL is further adjustable by changing the bandwidth of the loop.

For maximum flexibility, the SI5351A-B05631-GTR includes programmable output frequency dividers, allowing for a variety of output frequency ranges. With this feature, a single input frequency can be used to generate multiple different output frequencies. In addition, the device can program when the dividers reset, giving the user the ability to synchronize multiple devices.

The SI5351A-B05631-GTR also features a 25MHz onboard crystal oscillator, allowing high frequency accuracy without the need for external components. This oscillator is adjustable, giving the user the ability to tweak the output frequency if needed.

The SI5351A-B05631-GTR supports a variety of output waveforms, including sinusoidal, triangular, and square waveforms. In addition, it features 2 control pins which can be configured as either digital I/O or PWM outputs. This added flexibility gives the user the ability to program a variety of functions with a single device.

Conclusion

The SI5351A-B05631-GTR is a Clock Generator, PLL, and Frequency Synthesizer from Silicon Laboratories. It features a wide range of operating temperatures, low power consumption, and a simple 2-wire interface. Additionally, it features programmable output frequency dividers, an onboard 25MHz crystal oscillator, and two control pins selectable as either digital I/O or PWM outputs. It is well-suited for applications requiring high precision clock generation, including precision timing applications, communications systems, IEEE 1588 synchronization, industrial networks, sampling systems, frequency synthesizers, portable digital devices, test and measurement equipment, and SW/HW development tools.

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