DS1080LU+T

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The DS1080LU+T is a versatile integrated clock generator from ON Semiconductor, exhibiting unmatched perormance characteristics for timing and clocking requirements of today’s critical communication, industrial and medical applications. The fully integrated solution enables maximum frequency accuracy and best-in-class specifications for jitter and phase noise along with endurance and frequency stability characteristics.

The clock generator leverages an advanced 40nm process technology to provide an extremely accurate voltage controlled crystal oscillator (VCXO) with the option to implement a spread-spectrum clock. With simultaneous differential signal outputs and an internal 75-ohm termination network, the DS1080LU+T is designed to provide unparalleled integration, immunity, signal integrity and signal clarity.

The DS1080LU+T is designed with a muliple loop architecture providing programmability to ensure best-in-class output waveforms. The closed-loop control and multi-loop architecture ensure the shortest setup time and minimalphase noise, jitter, and drift. Even under temperature and supply variations, the DS1080LU+T remains robust with tight and stable parameters.

The DS1080LU+T is the ideal solution to power applications with stringent requirements on timing and clocking accuracy, such as telecom, datacom, mobile base stations, medical, and industrial. Its impressive level of integration, low power, and ultra-low phase noise make it the perfect choice for new designs and next generation system architectures.

Application Field

The DS1080LU+T integrated clock generator is designed to provide precision timing, timing control and frequency accuracy to a variety of system applications and environments. Its small form factor and low power requirements make it ideal for a range of applications. Some of the common fields this generator can be used in are:

• Telecommunications: The DS1080LU+T integrated clock generator provides precise timing and frequency accuracy for long-distance phone calls, mobile calls, and data transmissions.
• Medical: Providing precise timing and frequency accuracy for medical imaging, medical data storage and medical instrumentation.
• Industrial: Providing precise timing and frequency accuracy for industrial control systems, robotics, and automation.
• Broadcast: Providing precise timing and frequency accuracy for broadcast and video transmission.

Working Principle

The DS1080LU+T integrated clock generator works on a principle of selecting a low-jitter crystal oscillator (LXO) as the reference frequency and then digitally controlling the frequency deviation. This is accomplished by a digital-controlled oscillator (DCO) structure, which contains an output buffer and various frequency control loops. The DCO generates a signal with a frequency that is dependent on an analog control voltage that is generated from the LXO. The output buffer is used to condition the signal and enable it to drive the load.

In addition to providing frequency accuracy, the DS1080LU+T integrated clock generator also provides tight jitter performance. Jitter is a measure of the time-domain variation of the clock signal, and is typically a function of the frequency accuracy. The embedded jitter-filtering stages of the clock generator perform a maximum-likelihood detection of the singal\'s spectral components and filters out the undesired ones. This results in low jitter noise, which has a significant impact on system performance.

The DS1080LU+T integrated clock generator also comes with an optional spread-spectrum clock feature. Spread-spectrum clocks work by intentionally introducing a frequency deviation to the clock carrier frequency. This increases the frequency band of the clock, reduces the emissions of the clock, and reduces EMI emissions. Spread-spectrum clocks can also be used in frequencies with stringent harmonic emission requirements, such as radio frequency systems.

The DS1080LU+T integrated clock generator offers unmatched performance for timing and clocking applications. Its integrated solution provides maximum frequency accuracy and best-in-class jitter and phase noise specifications. It also provides a low power, small form factor, and an optional spread-spectrum clock feature for applications with stringent requirements. This makes the DS1080LU+T the perfect solution for today’s most challenging applications.

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