XR81101-F

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The XR81101-F is a highly integrated frequency synthesizer that has application in high-speed communications and other clock/timingrelated applications. It is designed to provide an accurate and reliable source of continuous timing signals, and is suitable for use in equipment such as wireless LANs and base stations. The device is based on a Phase-Locked Loop (PLL), which enables it to provide a wide range of frequencies with high accuracy and low jitter. This makes it ideal for applications that require precise control over timing signals.

Features

The XR81101-F provides a wide range of features, including:

• Integrated PLL for high-speed communications applications
• High accuracy and low jitter timing signals
• Output frequencies from 1MHz to 650MHz
• Flexible fractional-N or integer-N frequency synthesis
• Programmable phase-delay and pulse-width control
• High-speed control and reference clocks

Working Principle

The XR81101-F is built around a PLL, which is the core component of any frequency synthesizer. In the simplest terms, the PLL is a feedback loop that compares the output signal (phase and frequency) to the input reference (phase and frequency) and automatically adjusts the output signal to match. This allows the output signal to track the reference signal over changes in input frequency and temperature.

The XR81101-F uses an on-chip voltage-controlled oscillator (VCO) to generate the output signal. The PLL compares the output signal to the input reference using a phase detector. If the signal is not in phase with the reference, the phase detector sends a signal to the VCO to adjust the output frequency. This continues until the output signal is the same frequency as the reference, at which point the PLL is said to be “locked”.

When the PLL is locked, the output signal follows the reference signal over changes in temperature and input frequency. The XR81101-F has a programmable frequency divider which can be used to divide the output frequency of the VCO, providing a wide range of output frequencies from 1MHz to 650MHz.

Applications

The XR81101-F is designed for use in a wide range of applications, including:

• Wireless LANs
• Satellite Communications
• Base Stations
• RFID Tags
• Sonar Systems
• Robotic Systems
• Industrial Automation

Given its high accuracy and low jitter, the XR81101-F can provide a reliable source of timing signals in any of these applications. It is also capable of tracking changes in temperature and input frequency, making it ideal for applications that require precise control over timing signals.

Conclusion

The XR81101-F is a highly integrated frequency synthesizer that can be used in a wide range of clock/timing related applications. It is based on a Phase-Locked Loop (PLL), which provides high accuracy and low jitter timing signals. The device can be used to generate frequencies from 1MHz to 650MHz, and it can also track changes in temperature and input frequency. This makes it suitable for use in wireless LANs, satellite communications, and a variety of other applications.

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