SIT9005ACU1G-30NI

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Programmable Oscillators are devices capable of generating a periodic signal. They are often used in a variety of applications such as microprocessor-based systems, military electronics, and medical devices. The SIT9005ACU1G-30NI is one such device and it is unique in its ability to be customized for specific application needs.

Application Field

The SIT9005ACU1G-30NI is a small, low cost oscillator designed for electro-mechanical switching applications, such as those found in automatic door openers, robotics, or other commercial and industrial applications. This device can be programmed to produce accurate, narrow-band signals in the frequency range from 10kHz to 1MHz. It is suitable for use in harsh environments and can tolerate wide temperature ranges (-40°C to +85°C).

The SIT9005ACU1G-30NI also features dual-output capability that can be toggled with a dedicated enable pin. This makes it an ideal solution for applications that require multiple parameters to be controlled or monitored. The oscillator can also be powered form a wide range of DC voltages (3.3V to 5.5V) providing flexibility in system design.

As with all oscillator devices, the SIT9005ACU1G-30NI can be used in communication systems in which exact timing must be achieved. Examples include asynchronous serial communication (UART, SPI, I2C, etc.), frequency-division multiplexing (FDM) and time-division multiplexing (TDM).

Working Principle

The SIT9005ACU1G-30NI is an oscillator that works by generating a periodic RF signal. This signal is generated by a voltage-controlled oscillator (VCO), a device that is tuned to a specific frequency. This frequency is set by varying a voltage level (delta voltage, commonly referred to as VDD) which directly affects the oscillations produced by the VCO.

The frequency selection is then controlled by an analog switch and is coupled with a precision RC network to ensure a precise frequency output. This analog switch is driven by a digital counter circuit, which is converted by a phase frequency detector (PFD) to an analog voltage level. This voltage then drives the analog switch to its precise voltage level, thus precisely setting the frequency of the oscillator.

The other components of the SIT9005ACU1G-30NI are a reference oscillator, a crystal oscillator, a voltage regulator and an output divider. The reference oscillator produces a known frequency, which is then adjusted by the crystal oscillator. The voltage regulator maintains a constant voltage during the oscillation process, while the output divider produces two frequencies for the two outputs of the oscillator.

The overall working principle of the SIT9005ACU1G-30NI is to generate a periodic RF signal with a precise frequency determined by a combination of analog and digital circuitry. Its accurate output, flexibility and reliability make it an ideal choice for a wide range of applications requiring accurate small-signal oscillations.

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