SIT9005ACL2D-25DP

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Programmable oscillators are versatile devices that are used to generate precise and adjustable frequencies used in digital and analog circuits. The modern oscillator devices are used in variety of products found in industry and consumer applications such as medical devices, cellular communication, robotics, and industrial automation. One such programmable oscillator device is the SIT9005ACL2D-25DP. This article will explain the applications field of this device and the working principle that allows it to produce oscillations.

Applications Field

The SIT9005ACL2D-25DP programmable oscillator device is a wideband programmable oscillator that has a frequency range of 10-150MHz. This frequency can be programmed in the form of a register from the output signals of the PLL synthesizer. The device also features a temperature stability of +/– 0.1ppm across the whole operating temperature range of -40°C to + 85°C. Furthermore, it is able to generate precise frequencies with low phase noise, jitter and harmonics. All of these features combine to make the SIT9005ACL2D-25DP suitable for a wide range of applications such as communication systems, digital signal processing, medical devices, and computer systems to name a few.

Working Principle

The SIT9005ACL2D-25DP works in a similar way to most oscillator devices. It uses a circuit called a PLL (Phase Locked Loop) Synthesizer to generate a stable frequency. The PLL Synthesizer is essentially a closed loop controlling system which uses signals from a reference clock in order to generate an output frequency. The reference clock is usually provided by an external oscillator or crystal. The PLL Synthesizer then uses a process of phase locked looping to multiply the clock signals and produce a stable output frequency. The frequency of the output signal can then be written to a register to program the device.

The SIT9005ACL2D-25DP also features an internal voltage or current-controlled oscillator (VCO or ICO) that is used to generate stable high frequency signals. This signal is then filtered using a low pass filter to produce a sinusoidal signal that can be amplified by an amplifier in order to obtain the output frequency. The SIT9005ACL2D-25DP also features a so-called Power-On Lockout feature that prevents the oscillator from starting until the programming registers are written with the correct frequency.

Furthermore, the SIT9005ACL2D-25DP has a fail-safe mode in which the oscillator can change its output automatically if the reference clock fails. This feature ensures that the oscillator will not produce a distorted output during failure and will maintain the original frequency level with minimal errors.

Conclusion

The SIT9005ACL2D-25DP is a versatile and low-cost programmable oscillator device with a wide frequency range and low phase noise, jitter and harmonic distortion. Its wide array of features make it suitable for many different applications across industrial and consumer markets. The PLL Synthesizer and VCO are used together to generate the desired output frequency, and the fail-safe mode ensures that the device will not produce a distorted output in the event of a reference clock failure.

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