SIT9002AI-48H25DT

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Programmable oscillators provide a cost-effective solution for applications that require high-precision frequency, such as radios, TV sets and computers. The SIT9002AI-48H25DT is a versatile programmable oscillator that is designed to provide a wide range of frequencies, from 750kHz to 20MHz, while maintaining a tight tolerance of ± 25ppm over a wide temperature range of -20°C to +85°C. It is a highly integrated device, consisting of a timing resistor, piezo oscillator, comparator and low noise, high accuracy frequency divider.

The SIT9002AI-48H25DT is suitable for a range of applications where a steady, precise frequency is needed, including telecom base station clock distribution and general timing applications such as message generation, data transmission and audio/video encoding. It can also be used as a reference clock source for frequency synthesisers, as well as for controlling voltage-controlled oscillators (VCOs).

The working principle of the SIT9002AI-48H25DT is based on a combination of a highly accurate frequency divider and a Piezo-electric quartz crystal. The crystal vibrates at a precisely known frequency and sends an electrical signal to the frequency divider. The output of the divider is then compared with the reference input frequency to determine whether it is in frequency lock. If the two frequencies differ, the frequency divider adjustments are made automatically until frequency lock is achieved.

The frequency divider is designed to provide a very wide range of frequency options, from 750kHz to 20MHz. It is also programmed using an externally supplied clock frequency, which reduces the development time of the application by avoiding direct programming of the frequency divider.

The SIT9002AI-48H25DT also includes an advanced temperature compensation feature to ensure the output frequency is maintained over a wide temperature range (-20°C to +85°C). This minimises the need for frequent recalibration and helps to reduce complexity and cost of the system.

In addition to providing a stable and reliable frequency output, the SIT9002AI-48H25DT also offers enhanced jitter performance and excellent phase noise performance. This makes it ideal for applications where extremely low phase noise and jitter are required, such as test and measurement equipment, communications systems, and other high-precision applications.

Overall, the SIT9002AI-48H25DT is a highly integrated and cost-effective programmable oscillator that offers a wide range of frequency options, improved jitter and phase noise performance, and excellent temperature stability over a wide temperature range. It is ideal for any application that requires a high degree of frequency precision, such as telecom base station clock distribution and general timing applications.

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