SIT9003AI-3-28SB

Programmable Oscillators

Programmable oscillators are used to generate custom frequencies with a high level of accuracy. One example of a programmable oscillator is the SIT9003AI-3-28SB.

The SIT9003AI-3-28SB programmable oscillator integrates a high-performance CMOS oscillator, a crystal oscillator, and a synchronization oscillator into one package. It is designed to generate production-level frequencies from 30 kHz up to 30 MHz with very low jitter. It has an integrated fan-out buffer with an accurate delay control for CPU and SDRAM synchronization. It also has an on/off function for turning off the oscillator in extreme power saving applications.

Application Field

The SIT9003AI-3-28SB programmable oscillator excels in communications, industrial and general instrumentation, data acquisition and control, disk drives and modems. It provides a reliable and economical solution for manufacturers who require a wide range of frequencies in their various control and communication applications.

The SIT9003AI-3-28SB is especially well-suited to communications applications, where frequency accuracy and low jitter are critical. Its integrated fan-out buffer allows it to generate frequency-controlled signals in order to meet the needs of today’s complex network systems. The SIT9003AI-3-28SB also provides an on/off function to reduce current consumption in low-power applications.

Working Principle

The SIT9003AI-3-28SB programmable oscillator is designed to generate frequencies from 30 kHz up to 30 MHz with low jitter and high accuracy. It is based on a crystal oscillator circuit, which consists of a crystal and two active devices. The crystal is made up of two metal plates vibrating at their natural frequency in response to an alternating current. The alternating current is generated by the active devices – transistors or field effect transistors (FETs). The frequency of the oscillations is determined by the size and shape of the crystal and is referred to as the “resonant frequency”. The two active devices are used to adjust the frequency of the oscillator and to compensate for temperature and aging.

The output of the crystal oscillator is a square wave, so a ‘ divider’ circuit is used to reduce the frequency to the desired level. The SIT9003AI-3-28SB also incorporates a fan-out buffer to provide more than one output at the same frequency. This can be used for CPU and SDRAM synchronization, among other applications.

The SIT9003AI-3-28SB can be an ideal solution for a wide range of frequency-control needs. It is reliable, economical and high-performance, making it perfect for applications such as communications, instrumentation, data acquisition and control.