ADN2913ACPZ

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ADN2913ACPZ Application Field and Working Principle

The ADN2913ACPZ is a low-cost, high-performance clock/timing IC specifically designed for a range of applications. This application specific IC with an on-chip power-saving regulator allows a wide frequency range of operation and incorporates a wide range of components essential for proper functioning. Its multiple frequency input clocks allow synchronization of multiple functions, while its programmable clock output generator allows flexible use of oscillator frequencies. Further features include a low phase-noise oscillator, a phase frequency detector to help with frequency offset adjustment, and a programmable oscillator frequency adjustment.

The ADN2913ACPZ is suitable for applications such as wireless systems, communication systems, printers, and data acquisition. It is available in a range of packages from a 0.5 mm pitch TQ FP, up to a 28 pin TSSOP. It supports various operating temperature ranges from -40 to 85C and from 35000 to 73000 pF, depending on the specific model.

The working principle of the ADN2913ACPZ is based on a hierarchical clock architecture, commonly referred to as an analog-only Phase-Locked Loop (PLL). This architecture is a variation of the standard digital PLL, whereby all components of the clock/timing generator are analog, thereby simplifying operation and reducing system load and consumption.

The first step in the operation of the ADN2913ACPZ is the separation of the clock input signal. The clock input signal has three configurable frequency ranges, from1 MHz to 50 MHz and from 200 MHz to 500 MHz. The clock input signal is then divided by an adjustable division ratio to create an output frequency whose center frequency is half the clock input frequency. This is sent to the phase detector, which multiplies the two signals, creating two output signals (the clock input signal and the division output signal) that are in-phase with each other. The output signals are then fed to the programmable oscillator.

The programmable oscillator is the key component in the clock/timing loop. It works by adjusting the output frequency based on the phase error between the two signals, while keeping the division ratio fixed. This enables the ADN2913ACPZ to provide a stable clock output with minimal phase noise. The clock output is then sent to the post division loop, where the division ratio is adjusted to fine-tune the frequency output. If a different frequency output is desired, the division ratio can be changed and the phase error between the clock input and the division output is adjusted.

The ADN2913ACPZ is designed for applications that require low phase noise, high output frequency accuracy, and flexibility to fine-tune the output frequency. It is suitable for a wide range of applications, from automotive market to multimedia streaming devices, from wired communication systems to wireless protocols. By taking advantage of the adjustable division ratio, the frequency accuracy can be improved, as well as multiple frequency output can be generated. Its stability and low power consumption are some of its key features, making it an attractive choice for cost-sensitive markets.

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