SL28SRC04BZCT

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Introduction: The SL28SRC04BZCT is a leading clock generator designed for digital synthesis, communication, and computer-related applications. It is a highly integrated clock generation solution providing high performance, low noise, and low power with low cost. The device is designed to use a low power Integrated Circuit (IC) to deliver a complete frequency-locked output signal with a range of frequencies from 50 kHz to 1 GHz.

Application Fields: The SL28SRC04BZCT is the ideal clock generator for a variety of applications. Primarily, it is used for telecommunications such as in Voice over IP (VoIP), WiMAX, Global System for Mobile communications (GSM), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE) and other cellular systems. It is also used for set-top boxes, digital audio systems as well as for embedded systems and computing applications.

Working Principle: At its heart, the SL28SRC04BZCT is a complete frequency synthesis solution. It features a low-noise PLL (Phase Locked Loop) that utilizes a wide range of reference crystals and clock generator chip with enhanced features like:

• Analog Phase-Locked-Loop (APLL) consisting of a programmable fractional-N counter and charge pump.
• Buffers that generate a variety of digital logic outputs up to 1GHz.
• Wide range of input frequencies, including 50MHz to 100Mhz.
• Compatible with a wide range of output frequencies, from 50kHz to 1GHz
• A linearity of better than 0.1% over temperature and process.
• Low additive-jitter at the output.
• A single-ended output voltage.
• Integrated crystal application circuit.

The APLL core optimizes the phase noise performance of the device. It consists of a programmable fractional-N counter and a low-noise charge pump, which allows the core circuit to generate output frequencies with ultra-low jitter and high accuracy over temperature and voltage ranges. The charges are regulated and monitored via the loop filter that maintains the locked condition of the PLL. The charge pump contains a differential amplifier circuitry and can respond to the loop filter’s gain and phase in order to stabilize the phase locked loop.

The output buffer converts the output from the phase locked loop into a series of logic-level signals, which are then fed to the output stage. The output stage provides differential outputs for both low and high frequency applications. The low-noise output stage also takes into account the input voltage, process and temperature variations, to ensure a stable frequency output.

Conclusion: The SL28SRC04BZCT is a complete frequency-locked clock generator designed for low-noise, low-power, and high-accuracy applications. Its features include included reference crystals, a low-noise PLL, buffered output stages and a wide range of output frequencies. The device is well-suited for telecom applications and other embedded and computing systems.

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