SIT9120AC-1C-33S

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Programmable oscillators are specialized timing circuits that are typically used in precision clocks, countertimers, frequency synthesizers, and phase-locked loops. Their main purpose is to generate and maintain an oscillating frequency or phase signature over a wide range of operating conditions. The SIT9120AC-1C-33S is one such type of programmable oscillator.

The SIT9120AC-1C-33S programmable oscillator is an ultra-low phase noise device designed to offer a variety of frequency, output drive, temperature range, and other options that can be tailored to meet customers’ application requirements. It is suitable for use in a variety of applications, including communications systems, medical devices, automotive electronics, and industrial instrumentation. The device supports a wide range of frequencies from 1 KHz to 320 MHz. Its minior output is up to 40 mV. It has two output levels, one for low frequency and one for medium frequency.

The SIT9120AC-1C-33S also features an integrated frequency up/down counter that allows users to program the device with a pre-defined sequence of frequency steps, which is useful in applications that require agile connectivity or frequency hopping. Additionally, the device can be programmed to provide a selectable duty cycle, depending on the user’s application needs.

The working principle of the SIT9120AC-1C-33S is based on the time interval (TI) oscillator topology. This topology uses pairs of complementary gates to create an oscillating signal. The timing is controlled by a resistor and a capacitor placed between the gates in the pair. This pair of gates acts as a linear amplifier that is configured as a negative feedback system. The gain of this amplifier determines the time it takes for the signal to rise and fall, and thus determines the oscillation frequency. A high quality crystal is used as the frequency reference for the oscillator and typically a microcontroller can be used to program the frequency divider values of the oscillator circuit.

Overall, the SIT9120AC-1C-33S is an ideal choice for applications requiring precision frequency timing and low-noise operation. With its combination of frequency, output drive, temperature, and other options, it is an excellent choice for many applications, such as clock and data recovery, radar, video and audio encoding, and telecom infrastructure.

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