SIT9005ACT1G-30EP

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Programmable oscillators are specialized clock sources used to generate clock signals with specific frequencies and jitter characteristics. In many cases, they offer the ability to program a frequency that is not available in traditional clock oscillators. Among these devices, the SIT9005ACT1G-30EP is a notable example that has a wide range of applications and is designed for high performance. This article will discuss SIT9005ACT1G-30EP\'s applications and working principles.

Application Fields

SIT9005ACT1G-30EP is Programmable Oscillator with low jitter performance in the frequency range from 0.25 to 1000 MHz. Its output types are CMOS, HCMOS and LVCMOS, providing superior flexibility and performance in a wide range of applications. With a typical jitter lower than 100fs, this oscillator is often used in telecom applications including SONET/SDH, Ethernet, Fibre Channel, IEEE 1588, and G.hn, as well as industrial, medical and military applications. This oscillator family provides the lowest jitter available on the market when compared to similar devices, making it ideal for high-speed applications.

The SIT9005ACT1G-30EP is available in a variety of package options, including 4×4 (QFN), 5×5 (TQFN), and 7×7 (TQFN), as well as two temperature options, industrial (-40/+85 °C) and extended (-55/+125 °C). It also features a high performance, low-power mode (HP/LP) that allows the device to be used in a range of power monitor applications, as well as a low noise mode (LS) designed for lower noise operation.

Working Principle

The SIT9005ACT1G-30EP Programmable Oscillator is a frequency-tunable device that can be programmed to produce a specific frequency in the 0.25 to 1000 MHz range. It utilizes a Phase-Locked Loop (PLL) and a programmable loop filter to generate a reference clock signal with a center frequency that is determined by an external frequency control shift (FCSH) voltage. The FCSH voltage can be generated by an external voltage controlled programmable oscillator or it can be programmed through a digital interface.

The SIT9005ACT1G-30EP is able to achieve performance with superior jitter and frequency stability by using a unique delta sigma modulation architecture. This architecture multiples the frequency of a reference source by a programmable amount and then converts it to an integer value. The reference source can be an external input clock or an integrated LPCO (Low-Power-Clock oscillator). The delta-sigma modulation is adjusted by the FCSH voltage, which controls the multiplication factor and effectively tunes the output frequency.

In addition, the SIT9005ACT1G-30EP also includes other features that enhance total jitter performance. These features include digital controls for setting the output frequency and power supply range, as well as an integrated temperature sensor that allows for compensation for temperature variations. All these features make the SIT9005ACT1G-30EP an optimal choice for telecom and industrial applications that need low-jitter high-frequency clocks.

Conclusion

In conclusion, the SIT9005ACT1G-30EP Programmable Oscillator is a versatile device that offers excellent performance in a wide range of applications. It is an ideal device for telecom, industrial and military applications, where jitter performance is critical. Its features make it an optimal choice for applications needing both stability and low-jitter frequency sources.

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