SIT1602AIT2-25S

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Programmable Oscillators (POs) play a crucial role in electronic and communication systems, allowing users to parameterize and tune their frequency and phase shift components according to system requirements. As such, the SIT1602AIT2-25S Programmable Oscillator is an extremely important type of PO designed to meet the needs of modern high-end audio, communications and other control systems in the industrial and telecommunications industries. This type of oscillator is a fully integrated EPROM-programmable master clock/crystal oscillator that utilizes an on-chip EPROM to determine the frequency and phase of its output waveform.

The SIT1602AIT2-25S is a versatile and reliable oscillator, offering a wide frequency range of 10 MHz to 25 MHz, a wide timing range of 4 ns to 25 ns, a typical phase noise at 10 KHz of -138 dBc/Hz, and a high frequency stability as low as 0.005 ppm/ cycle. The oscillator also boasts a wide supply voltage range of 1.8V to 3.3V. In addition, the fact that it is a fully integrated oscillator with integrated EPROM memory means that the output can be easily reconfigured to suit the user’s requirements.

As for its working principle, the oscillator is composed of two parts: an Analog Front-End (AFE) and a Digital Logic Unit (DLU). The AFE includes a reference crystal oscillator, a programmable frequency divider, and a phase comparator. It is responsible for generating the output waveform. The DLU is responsible for controlling the waveform generation, by providing the necessary biasing, control, and sequencing control signals. It contains digital logic, such as counters and latches, which are responsible for configuring the operation of the AFE.

The AFE uses a reference frequency to set the output frequency of the oscillator. This reference frequency is typically generated by a voltage-controlled crystal oscillator (VCXO) from the reference crystal. The digitally programmed frequency divider is then used to divide the reference frequency to generate the desired output frequency. The phase comparator is then used to compare the output waveform to the desired waveform. If the phase comparison is inaccurate, the synthesizer adjusts the output frequency to match the desired waveform. It is ultimately the goal of the DLU to control the phase, frequency, and duty cycle of the output waveform.

The SIT1602AIT2-25S Programmable Oscillator is an important part of the larger family of Programmable Oscillators. Its versatility, easy programming, and high frequency stability make it a perfect choice for many industrial, communications, and consumer applications. Its simple working principle and reliable performance are sure to make PO design easier and help to meet rapid requirements in modern high-end systems.

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