552ARI-01LFT

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552ARI-01LFT is a two-wire serial interface that synchronizes a PLL synthesizer to an input clock, tri-state output control, and a low jitter clock generator, making it suitable for a range of clock/timing applications.

Product Overview

The 552ARI-01LFT product is a frequency synthesizer, clock generator and PLL based on a combination of programmable EEPROM and CMOS logic. The integrated designs offer a fast, easy and efficient way to generate low jitter clocks and clocks within the targeted frequency range. It comes in a TSSOP-24 package, making it an ideal choice for small board space applications.

The integrated parts of the 552ARI-01LFT are made up of a phase-locked loop (PLL) with low frequency jitter, a very low phase noise clock generator, a two-wire serial interface (I2C compatible) and an inbuilt power sequencer. This product also features an adjustable switch and digital logic output control. The outputs range from 3.3 to 5.5V and takes in an oscillator frequency range of 15MHz-50MHz.

Application Field and Working Principle

The 552ARI-01LFT is primarily used in the consumer electronics industry, providing a low jitter output for consumer audio and video devices. It is also used in base station and other communication systems for timing synchronization.

To illustrate its working principle, we can consider a simplified block diagram of the 552ARI-01LFT as shown below.

The input signal is first received by the reference source after which it goes to the phase detector and the charge pump. The phase detector compares the input signal and the feedback signal. The output of the phase detector is then filtered by the loop filter which produces the control voltage. This control voltage is then used by the voltage controlled oscillator (VCO) to adjust the frequency of its output. This output signal is then split into a feedback signal and a clock/timing signal.

The clock/timing signal is then fed to the output buffer which can be enabled and disabled through the two-wire serial interface. The two-wire interface also allows for programming of the VCO and loop filter for fine-tuning.

The 552ARI-01LFT is a versatile device suitable for a range of clock/timing applications and can be used as a frequency synthesizer, clock generator, or PLL. The low jitter and low power consumption of the device make it an ideal choice for consumer electronics, communications and medical applications.

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