844003AGLFT

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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers encompass myriad technologies and cover a wide range of applications. The 844003AGLFT is a great example of one of the many possibilities in this area. This application field and its underlying principles are explained in detail below.

Overview

The 844003AGLFT is an Ultra Low jitter frequency synthesizer with an integrated voltage-controlled oscillator (VCO). This device is designed to provide a stable high-frequency clock signal for applications such as Networking, Storage, Medical equipment, Life Sciences, Automotive and Aerospace systems.

This clock synthesizer has a typical jitter of 0.7 ps and a wide operating range from 16 KHz to 1000 MHz. It also features a slew rate of 8V/ns, a fast switching speed of 400 ps, a programmable voltage rail from 2.5V to 3.3V, and low power consumption of 350 mW.

Working Principle

The 844003AGLFT clock synthesizer works by combining an input reference signal along with a programmable PLL to generate an output clock signal with the desired frequency. The input reference signal can be an external oscillator or a digital clock signal.

Once the input reference signal has been selected, the PLL utilizes a voltage-controlled oscillator (VCO) and a PLL frequency divider to generate an output clock signal. The VCO is a circuit element that has a tunable frequency determined by an applied voltage. It is used to generate a high frequency signal with very low jitter. The PLL frequency divider is then used to divide the VCO frequency by a factor of N. The output clock frequency can then be calculated as: Output Frequency = VCO Frequency/N.

The PLL also has various control inputs such as frequency control, multiplicative control, and loop selectors. The frequency control input is used to adjust the frequency of the reference signal while the multiplier control input allows the user to select a desired frequency multiplier. The loop selectors are used to set the loop parameters such as the loop bandwidth and the phase margin to optimize loop performance.

The 844003AGLFT also includes a power save logic block in order to reduce power consumption during periods of inactivity. The power management block consists of a power enable pin, power down pin, and a power enable low pin. Each of these pins can be asserted either individually or in combination in order to enter power saving mode.

Benefits

The 844003AGLFT clock synthesizer provides numerous benefits that make it an ideal choice for a wide range of applications. These include the following:

• Low power consumption – The device consumes only 350mW of power, making it ideal for battery-operated applications.
• Fast switching speed – It has a fast switching speed of 400 ps, providing quick response times and excellent performance in high-speed applications.
• Low jitter – The typical jitter of the synthesizer is 0.7 ps and can be further reduced to 0.5 ps with an external loop filter design.
• Wide operating range – The operating range of the synthesizer is from 16 kHz to 1000 MHz, allowing it to be used in a variety of applications.
• Power management – The device includes a power management block for improved power savings during periods of inactivity.

Conclusion

The 844003AGLFT frequency synthesizer is a great example of a low power, high performance, and jitter-free clock solution. It provides the user with a wide range of benefits, including low power consumption, fast switching speed, low jitter, wide operating range, and power management, making it an ideal choice for a wide range of applications.

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