THS788PFD

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The THS788PFD is hardware-based, ultra low jitter, high performance programmable clock multiplier. It is widely used in network, telecom, and wireless communications applications. In this article, we will discuss the application field and working principle of the THS788PFD.

Application Field

The THS788PFD is specifically designed for use in frequency translation applications. It is capable of importing an input reference frequency of up to 800 MHz and reducing it by up to 8 times. This enables devices such as FPGAs and SoCs to operate at a lower frequency than the input reference frequency, providing improved performance and system integration.

The THS788PFD is also capable of multiplying the input reference frequency by up to 8 times, enabling faster data rates and increased system performance. This makes the device ideal for applications that require very high bandwidth and data rate performance, such as in network, telecom, and wireless communications systems.

In addition, the THS788PFD is well-suited for embedded SoC-based designs. The device can be programmable via SPI and I2C interfaces, making it suitable for embedded applications that require a flexible, low power solution. The device is also compatible with the Serial RapidIO protocol, making it ideal for embedded designs needing high performance and low latency.

Working Principle

The THS788PFD is a frequency multiplier/scaler that utilizes a PLL-based architecture to provide very low jitter performance. The device consists of an input reference clock and a programmable fractional-N divider/phase-frequency detector (PFD) block. The input reference clock is divided down to produce a lower frequency reference clock. The PFD block then multiplies the lower frequency reference clock to the desired output frequency.

The programmability of the device is provided by a fully digital frequency programming interface. The interface allows the user to program the output frequency through a SPI or I2C interface. The programming interface also allows users to monitor the current frequency, as well as fine-tune the frequency offset. Additionally, the programming interface provides various features such as phase lock loop (PLL) adjustment, phase adjustment, edit frequency rate phase adjustment, and frequency offset adjustment.

In addition to its frequency programming capabilities, the THS788PFD also features an embedded clock-divider block that allows for lower jitter performance. This clock-divider block allows for a wider operating range of the device, and provides further flexibility for users in multiple jitter budget applications.

The THS788PFD is also capable of providing ultra-low jitter performance. It utilizes a very sophisticated PLL circuit and an embedded low-phase-noise loop filter to provide very low jitter performance. This enables the device to operate even at very low frequencies, providing very high performance and low jitter levels.

Conclusion

The THS788PFD is a hardware-based, ultra-low jitter, high performance programmable clock multiplier. It is ideal for use in high-speed frequency translation applications, such as in network, telecom, and wireless communications systems. The device is also capable of providing programmability through SPI and I2C interfaces, and is compatible with the Serial RapidIO protocol.

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