SIT9005ACL2H-18DJ

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Programmable Oscillators are electronic components that produce a range of regular electronic signals. Newer generations of this technology, such as the Sitronix SIT9005ACL2H-18DJ, offer a wide range of features and capabilities. This article will discuss the application field and working principle of this popular component.

Application Field

The SIT9005ACL2H-18DJ is a programmable oscillator from Sitronix’s Quality Assured Silicon (QAS) range. It is suitable for a variety of applications, such as computing, communications, office automation, instrumentation, control system, and digital television. The device is capable of providing a precise frequency at both low and high temperatures, making it ideal for use in industrial and medical environments.

The SIT9005ACL2H-18DJ is built with an all-silicon, hybrid design that allows it to operate within an extended temperature range of -40 to +85°C. It is available in multiple package sizes, including 6.2 x 3.2mm, 6.7 x 4.7mm, 7.25 x 5.25mm, and 7.3 x 5.3mm, making it easy to fit into most circuit applications.

The device features a high total frequency accuracy of 0.1ppm from -20 to +85°C, which is three times better than conventional temperature-compensated crystal oscillators (TCXO). Other features of the SIT9005ACL2H-18DJ include an integrated programmable divide-by-N prescaler for programmable frequency dividers, an integrated watchdog timer for output selectable time-out control, and an optional 3.3V supply source for µP/µC applications.

Working Principle

The SIT9005ACL2H-18DJ uses a hybrid integration of a voltage controlled crystal oscillator (VCXO) and a low frequency programmable logic circuit. The device uses a single crystal resonator with a high quality factor to provide precise frequencies and temperature stabilities. The chip is designed to minimize the impact of environmental conditions on the output frequency.

The working principle of the device involves its Voltage Controlled Oscillator (VCO). This oscillator is constructed with an LC (Inductance & Capacitance) module. It is driven by an Input Voltage that is configurable from 0 to 3.3V. The ground connection of the voltage is connected to the reference point of the chip, which is VSS. The oscillator offers high-tunability and excellent frequency stability for the complete frequency range.

The device also features a programmable logic circuit. The logic circuitry provides the ability to program a variety of functions, such as programmable frequency dividers, single/multiple pulse outputs, and dual output control. It also includes an oscillator control register that allows for controlling the calibration and toggle between output frequency.

The SIT9005ACL2H-18DJ operating temperature ranges from -40 to +85°C. The device utilizes an on-chip temperature compensation circuit that can quickly compensate for temperature changes. The thermal drift of the oscillator is typically less than 0.1ppm/°C. In addition, the device exhibits low power consumption with a maximum rated current of <1.6mA.

Conclusion

The SIT9005ACL2H-18DJ is a programmable oscillator designed for a wide range of applications. It offers a high total frequency accuracy of 0.1ppm from -20 to +85°C and utilizes a hybrid design that allows it to operate over the extended temperature range of -40 to +85°C. The device also features a Voltage Controlled Oscillator, a programmable logic circuit, and an integrated programmable divide-by-N prescaler. These features make the SIT9005ACL2H-18DJ an ideal choice for a wide range of embedded and industrial applications.

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