SY89420VJZ

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The SY89420VJZ is a programmable integer-N frequency synthesizer with a clocking and auto-calibration (I2C) control interface. It functions as a reference clock generator with versatile control logic, employed in high-grade audio components, including the generation of digital audio clocks such as those used in high-definition television (HDTV) and high-definition radio (HDTV).

Application Field

The SY89420VJZ is mainly used as a reference clock generator for high-end Audio and Video equipment, where high accuracy and low jitter are main requirements. These equipments can range from HDTVs, High-End Audio receivers, HD Radios, Professional audio/visual broadcasting equipment, to dedicated audio systems like digital mixers and models requiring an extremely reliable clock for digital signal timing. Because of its low noise and its superior precision, it is highly suitable for the wireless communication and networking applications such as frequency hopping and wireless LAN.

Working Principles

The SY89420VJZ utilizes a VCO (Voltage Controlled Oscillator) to generate a precise and stable frequency, which is then phased locked to the desired frequency. The programmable register can hold dividers of up to 8-bit resolution and is monitored through an I2C interface. This allows for precise control of the clock\'s frequency by changing the registered number. To ensure precise accuracy, the programmable integer-N frequency synthesizer also comes with an auto-calibration feature that continuously monitors the output of the VCO. This allows the device to compensate for any fluctuations in frequency due to external factors, such as temperature, power supply or load fluctuations, ensuring precise and stable frequencies are always maintained.

The SY89420VJZ further includes a range of additional features such as jitter reduction, low power consumption, and immunity to ESD, contributing to its overall robust performance. As such, it is an ideal choice for a variety of audio and video applications.

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