8431AMI-21LFT

Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

The 8431AMI-21LFT is a low-skew, low-jitter, programmable-frequency clock generator that can be used to provide reliable synchronization and timing signals. This clock generator uses an on-chip voltage-controlled oscillator (VCO) which can be programmed to produce any desired frequency from 1 KHz up to 125 MHz. It has high output clock accuracy, low-jitter waveforms, and low power consumption.

Applications

The 8431AMI-21LFT is a highly-flexible clock generator and can be used in many different types of applications. It is ideal for communication base stations, backhaul networking hubs, WLAN and WiMax access points, industrial-grade data acquisition, robotics, and medical applications which require reliable timing signals.

Working Principle

The 8431AMI-21LFT is based on a voltage-controlled oscillator (VCO), where the output frequency is determined by the control voltage applied to it. The VCO is driven by an on-chip voltage reference circuit, which is programmed using an external resistor divider network, allowing the output frequency to be precisely programmed over a wide range, from 1 KHz up to 125 MHz. A high-precision voltage reference also ensures that the output frequency will remain stable over temperature variations and aging.

The output of the VCO is coupled to a phase-locked loop (PLL) circuit, which is used to generate multiple output clock signals with low-jitter attributes. The PLL is programmed to divide the VCO output frequency by 1 to 16, generating clock signals that have different levels of accuracy and jitter.

Conclusion

The 8431AMI-21LFT is a robust and reliable clock generator, capable of producing low-skew, low-jitter output signals across a wide range of frequency, making it ideal for communications, data acquisition, and industrial-grade applications. Its on-chip VCO and adjustable voltage reference allow precise frequency programming, and its PLL provides multiple outputs with low-jitter waveforms.