SI5335A-B01827-GM

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The SI5335A-B01827-GM is an innovative Clock Generator and PLL (Phase Locked Loop) Frequency Synthesizer developed and manufactured by Silicon Labs, a leading vendor of semiconductor solutions and solutions for hardware and software. It is part of the company’s SI5335 family of products, and is designed to offer reduced complexity and power consumption, while providing ultra-low EMI (electro-magnetic interference).

The SI5335A-B01827-GM supports up to four outputs at frequencies up to 500 MHz, and features an adjustable output skews to +/- 500 Ps (picoseconds). It also offers a two-wire serial interface, a wide input frequency range, and small size. In order to better understand its inner workings and application field, it is important to look at its working principle, features, and main uses.

Working Principle

The SI5335A-B01827-GM is a digital, clock generation, and Phase Locked Loop Frequency Synthesizer device based on a patented architecture that integrates a voltage-controlled oscillator (VCO) and a programmable-differential phase-frequency detector (PDPFD). This dual-loop architecture enables the device to lock to and track input reference frequencies as low as 10 kHz (or as high as 500 MHz depending on the part). This also enables the device to offer both high frequency accuracy and inexpensive serial port access.

The VCO is designed to generate the input clock signal directly from the reference frequency. The PDPFD then detects any difference between the incoming reference frequency and the generated output clock frequency and adjusts the VCO frequency accordingly. This two-loop system allows the device to quickly and accurately track the reference frequency to maintain a low clock jitter over a wide range of frequencies and temperatures.

Features

The SI5335A-B01827-GM features multiple frequency ranges, output formats, and clock sources. The device offers a one-frequency output range from 10 kHz to 500MHz and a dual frequency output range from 50kHz to 500MHz. The device also has multiple clock formats, including single-ended (LVCMOS), differential (LVDS/LVPECL), and CML (current mode logic). It also has an adjustable differential skew of +/-500ps, and an integrated output buffer to ensure high-speed output performance.

The SI5335A-B01827-GM also has built-in temperature compensation and jitter-per-bit compensation for a variety of temperature operating conditions and varying clock speeds. Additionally, the device features dual, two-wire serial interfaces, allowing for a simple and easy-to-use multi-device synchronization. The input frequency range can be scaled to fit the customers’ requirements and the device can also be programmed via the serial interface or using the main or external clock source.

Application Field

The SI5335A-B01827-GM is primarily used in applications where high-frequency clock accuracy and low EMI are required. It can be used in a variety of applications including networking, storage, computing, and consumer electronics. Specifically, it is best suited for clock trees, high speed serial buses, data acquisition systems, and telecommunications. The device’s wide input frequency range and reduced complexity makes it an ideal solution for low-power, low-EMI applications.

Conclusion

The SI5335A-B01827-GM is a versatile Clock Generator and PLL Frequency Synthesizer that is designed to meet the needs of a wide range of applications. Its two-loop architecture offers high accuracy and fast locking to reference frequencies, while its serial port access allows for simple programming of the device. Additionally, the device’s small size and wide input frequency range make it an ideal solution for low-power, low-EMI applications and clock trees.

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