Clock jitter cleaners utilise ‘industry’s lowest’ phase noise
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A new series of clock jitter cleaners featuring the 'industry's lowest' phase noise and rms jitter performance has been launched by National Semiconductor.
The devices feature 111fs from 12 to 20MHz and a wideband noise floor of -162dBc/Hz at 184MHz output frequency. National claims this level of phase noise enhances the performance of systems used in wireless and wired communications, test and measurement, medical imaging and digital broadcast applications, while reducing overall BOM cost.
The LMK04800 range is comprised of four ICs including the LMK04808, LMK04806, LMK04805 and LMK04803. It is optimised for generating different frequencies up to 1.5GHz for clocking ADCs, DACs, SerDes and fpgas.
With integrated features such as holdover, switchover, multiple inputs, digital delay, analogue delay, odd/even dividers and 12 programmable output format drivers, the ICs are said to be flexible and configurable to support a variety of different architectures.
According to the power management specialist, this combination of performance and functional integration reduces clock architecture complexity and provides design engineers with multiple options to trade off system performance, component count and cost.
