AD809BRZ

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The AD809BRZ is a low jitter and highly programmable clock generator designed to meet the most demanding frequency synthesis requirements for networking, optical networking, and telecommunications systems. The device is ideal for applications that require low phase noise, high frequency switching with jitter frequency synthesis, and low jitter clocks with minimum interruption time. It has a comprehensive selection of output options, including LVDS, PECL, LVPECL, CMOS/LVDS, and fixed pulse outputs.

The AD809BRZ provides an integrated, reconfigurable filter that I/O jitter attenuation to the specified bit rate, and is compatible with a wide range of logic system timing parameters. It also features an integrated on-chip-oscillator that can be tuned or adjusted by an external resistor or capacitor. These features simplify system design, improve product performance, and reduce cost.

The device is also extremely well-suited to audio applications, offering a wide range of audible frequency synthesis with superior jitter performance. This includes both harmonic and non-harmonic frequency synthesis and precise programmable molar frequencies. Through precise tuning of the oscillator, feedforward jitter compensation can be achieved.

The AD809BRZ is suitable for a variety of clock timing applications, such as video, telecom and communication networks, digital consumer products, automotive, and military systems. It is designed to support frequencies from 10 to 600 MHz, and is available in a variety of package configurations, including 4mm2 PQFN, 4mm2 TQFN, and 5x5mm FC-8.

The AD809BRZ can be operated in two modes. The first mode is a basic built-in oscillator, which can be tuned or adjusted by an external resistor or capacitor, allowing for a fixed frequency with minimal jitter performance. In this mode, the output is referred to as an “internal output” and has a rising edge time near 65 ps. The second mode is a multi-tone PLL (phase-locked loop), which allows for frequency synthesis and programmable molar frequencies. This PLL mode supports 24 frequency bands from 10 to 600 MHz.

The PLL mode contains a high-performance loop-filter and its gain is automatically adjusted with frequency to achieve the desired performance. The device also contains an internal reference input which can be used to follow higher frequency reference sources, ensuring a low jitter output frequency. Furthermore, the PLL mode supports output divider ratios of 1:2, 1:4, or 1:8, allowing the output frequency to be increased to as high as 4.8 GHz.

The AD809BRZ is also capable of running the MASH (Multi-Stage Noise Shaping) modulation algorithm, which allows for frequency synthesis with even lower jitter and higher noise suppression than the traditional PLL mode. This feature helps reduce power consumption and makes the device particularly suitable for low power and high accuracy applications.

In summary, the AD809BRZ is an ideal solution for networks, optical networking, datacom, and telecom systems that require high frequency synthesis with low jitter performance. Thanks to its wide range of output options, it can easily be configured for a variety of applications, including LVDS, PECL, LVPECL, CMOS/LVDS, and fixed pulse outputs. The device further provides a low jitter output with minimal interruption time and support for MASH modulation algorithm, making it suitable for low power, high accuracy applications.

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