SIT1602BCB7-XXS

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Programmable oscillators are devices that allow for the production of stable and accurate signals for frequency control. The SIT1602BCB7-XXS is a type of multi-band low-power programmable oscillator from Sakurai Electronics that is designed for use in frequency control applications requiring low noise, high accuracy and low power consumption. The device combines high accuracy with low power consumption, making it a cost-effective and reliable choice for applications such as multi-band radio frequency (RF) receivers, multimode mobile phone transceivers and satellite navigation systems.

Application Field

The SIT1602BCB7-XXS is largely used for RF receivers and other frequency control applications. It features a wide frequency range of 5.5MHz to 900MHz, allowing for a variety of applications from low frequency radio communications to wireless local area networks and satellite communication. It has excellent temperature stability and require very low input current, making it ideal for use in low-power RF receivers and transceivers as well as Multi-Mode Mobile Phone (MMMP) applications. It also features a wide supply voltage range of 1.71V to 3.5V and an integrated low-voltage gate driver (LVD) with a low-voltage sleep mode, making it a suitable choice for portable and battery-powered applications such as satellite navigation systems.

Working Principle

The SIT1602BCB7-XXS is based on a voltage-controlled crystal oscillator (VCXO) and operates on an “RC (Resistors and Capacitors) mesh-type voltage controlled oscillator” principle. This includes an adjustable resistor and 3 capacitors (C1, C2, and C3) to form a mesh network as shown below. The resistor is adjusted to adjust the resonance of the oscillator and the capacitor values are chosen to set the oscillator frequency and phase noise.

The frequency and phase noise of the oscillator is set by controlling the resistor and capacitor values. The oscillator is designed to have a wide operating range and to provide excellent noise performance. The overall accuracy is also very good as the oscillator is designed with calibration curves and compensation coils. This ensures that the output frequencies remain consistent over a wide temperature range.

The SIT1602BCB7-XXS also has an adjustable duty cycle control circuit, which allows the duty cycle of the output signal to be adjusted depending on the application needs. This is controlled through the adjustment of the duty cycle trim pin. The adjustment of this trim pin can also be done remotely by controlling the voltage of the voltage control pin (VC).

The SIT1602BCB7-XXS also has a single-ended output (t0) and a differential output (t1). The single-ended output has a frequency range of 500kHz to 5.5MHz and the differential output has a frequency range of 5.5MHz to 900MHz. Both outputs can be programmed using a single interface pin, allowing for easy and fast programming.

Conclusion

In conclusion, the SIT1602BCB7-XXS is a versatile, low-power and multi-band programmable oscillator designed for frequency control applications such as RF receivers, multimode mobile phone transceivers and satellite navigation systems. It can be easily programmed to work with various frequencies and its excellent temperature stability, wide supply voltage range and its low current consumption make it an ideal choice for such applications.

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