SIT9005ACR1H-XXSN

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Programmable oscillators are versatile frequency sources that enables users to generate signals at specific frequencies for various purposes. The SIT9005A CR1H-XXSN is a programmable oscillator with a PLL that allows users to program or synthesize frequency outputs. The wide frequency range between 50 MHz and 600 MHz enables it to be used in a variety of applications.

Key Features and Benefits

• Fractional-N synthesizer technology for enhanced frequency resolution
• Extremely low jitter performance over the entire operating frequency range
• Extremely small size (2.0 x 1.6 mm)
• Available in 3.3V or 2.5V single-ended or differential output versions
• Integrated crystal oscillator circuit
• Synthesizer circuitry configurable by loading the serial configuration pins with an external serial EEPROM

Application Fields

This device is suitable for a variety of applications such as wireless communication (e.g. Bluetooth, Wi-Fi, RFID, GSM/GPRS, LTE), instrumentation equipment, network products and consumer electronics. The SIT9005ACR1H-XXSN is especially well-suited for use as a clock oscillator for DSPs, microcontrollers, and ASICs.

Working Principle

The SIT9005ACR1H-XXSN works by synthesizing frequency from lower to higher frequencies. It is realized by a wide range of complex signal processing techniques, such as low-pass filters, phase-locked loops and frequency dividers. The output frequency is programmable and can be set to any arbitrary frequency in a wide range. The frequency resolution is adjustable over a wide range and the accuracy can be increased by using fractional-N technology which allows the oscillator to reach even tighter tolerances.

At the heart of the oscillator is a PLL. The PLL is essentially a negative feedback loop consisting of a phase comparator, a voltage-controlled oscillator (VCO), a low-pass filter and a frequency divider. The phase comparator compares the frequency of the system output signal with the reference input frequency and generates an error signal. The resulting error signal is filtered and then fed back to the VCO, resulting in the system frequency being adjusted until it matches the reference frequency.

Once the frequency is locked, it is then divided down to the output frequency and the output signal is an exact replica of the reference frequency. The PLL is configurable and the frequency resolution is adjustable by loading the serial configuration pins with an external serial EEPROM. As the frequency range and resolution is adjustable, the SIT9005ACR1H-XXSN can be used in a variety of applications.

Conclusion

The SIT9005ACR1H-XXSN is a highly versatile programmable oscillator that can generate frequencies over a wide range. Its small size and low power consumption make it an ideal choice for a variety of applications. Its fractional-N synthesizer technology and tight frequency accuracy also make it suitable for clock oscillator applications. With its wide frequency range and adjustable resolution, the SIT9005ACR1H-XXSN is an ideal choice for a variety of applications.

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