IDT2309B-1HDCI

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The IDT2309B-1HDCI is a type of Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers. It is a silicon timing device designed to meet the most stringent requirements of standards compliance and data transmission characteristics, while ensuring great accuracy and low power consumption. It has application in various fields, especially in data communication applications and digital signal processing.

Application Field of IDT2309B-1HDCI

The IDT2309B-1HDCI is typically used in applications requiring frequency synthesis, low-noise clock sources, clock and data distribution, DDR phase-locked loop (PLLs), source-synchronous data capture, end-point timing recovery, and serial communications. Equipped with an eighth-period phase accumulator and selectable ratios, IDT2309B-1HDCI can be used to generate frequencies from 1 MHz to 350 MHz. That is why it has been widely adopted in fields like:

• Data Communications - It is used in different data communication protocols such as Ethernet, Fibre Channel, OCTEON, and peripheral component interconnect express (PCIe). With multiple channels and integrated clock jitter attenuator, its output is clean, low-jitter clock for clock buffer applications.
• Networking - Backbone networks require stable, low-cost clock solutions with low power consumption. IDT2309B-1HDCI fulfills this requirement with its PLLs providing precise clock signals with low power consumption.
• Video Production - As demand for HD video content is increasing, so is the demand for reliable clock solutions with low power consumption. IDT2309B-1HDCI has been an ideal solution in this context, as it can provide precise timing information that is essential for video production systems.
• Smart Sensors - With its low power consumption capability, IDT2309B-1HDCI is used in smart sensor applications, providing reliable time synchronization which is essential for any smart-sensing device.
• LiDAR System - LiDAR systems require precise timing control and low-noise clock signals. IDT2309B-1HDCI is well-suited for this application, as it can generate signals with low jitter, providing stable timing information which is essential for LiDAR operations.

Working Principle of IDT2309B-1HDCI

The IDT2309B-1HDCI uses a fully differential-PLL architecture which consists of a voltage-controlled oscillator (VCO), PLL loop filter and programmable differential dividers to generate desired frequencies from a single reference clock. The VCO converts the reference clock\'s frequency into a higher frequency, which is then divided down by the dividers to generate the desired output frequency.

The PLL loop filter is the key element in keeping the PLL stable and maintaining accurate timing. A low-pass filter connected in the feedback loop of the PLL filters out the out-of-band noise while providing fast settling characteristics. The inputted reference clock is filtered and the outputted clock is closely synchronized to the reference.

The IDT2309B-1HDCI also includes a phase-frequency detector, which monitors the phase and frequency difference between the inputted reference clock and outputted clock, and makes the necessary adjustments to keep the loop stable and maintain the desired frequency output. A charge pump is used to provide the necessary loop gain, and a programmable delay element is used to synchronize the output frequency to the reference.

Conclusion

The IDT2309B-1HDCI is an extremely versatile and reliable Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers which has been widely adopted in application fields like data communication, networking, video production, smart sensor and LiDAR. Its PLL loop filter, phase-frequency detector and programmable delay element make it ideal for these application, as it can provide precise clock that is essential in these systems.

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