SIT1602BI-31-30S-27.000000X

Frequency Stability:	±20ppm
Current - Supply (Disable) (Max):	4.3µA
Height - Seated (Max):	0.032" (0.80mm)
Size / Dimension:	0.197" L x 0.126" W (5.00mm x 3.20mm)
Package / Case:	4-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	4.5mA
Operating Temperature:	-40°C ~ 85°C
Absolute Pull Range (APR):	--
Series:	SiT1602B
Voltage - Supply:	3V
Output:	HCMOS, LVCMOS
Function:	Standby (Power Down)
Frequency:	27MHz
Type:	XO (Standard)
Base Resonator:	MEMS
Part Status:	Active
Packaging:	Tape & Reel (TR)

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SIT1602BI-31-30S-27.000000X Oscillators

Oscillators, also known as periodic waveform generators, are used in a wide array of applications to control repetitive motions or communications signals. In order to achieve a targeted performance, oscillators used in different applications have unique characteristic requirements that need to be designed into the oscillator circuit. The SIT1602BI-31-30S-27.000000X oscillator family is specifically designed for applications that require high phase accuracy, low power consumption and long term stability.

Application Field

The SIT1602BI-31-30S-27.000000X family of oscillators, by Alpha & Omega Semiconductor Corporation, can be used in a variety of precision frequency applications that require accurate and reliable timing. Examples of where the oscillator is used include computer hard drives, laptops, tablets and cell phone clocks. The temperature stability from -20°C to +85°C is also suitable for industrial applications such as programmable logic controllers and medical equipments. In addition, the low power consumption of the oscillator makes it suitable for low-power applications such as wearables and autonomous drones.

Working Principle

The SIT1602BI-31-30S-27.000000X oscillator is made up of two main parts - a voltage-controlled oscillator (VCO) and a frequency divider. The oscillator is based on the Colpitt’s circuit principles, which rely on a pair of capacitively-coupled tank circuits. The oscillator is set up such that the current passing through the tank circuits based on the phase difference between them causes the frequency of the output signal to increase or decrease continuously. The VCO is then tuned to achieve the specified frequency and stability of the oscillator.The frequency divider is also a critical element of the SIT1602BI-31-30S-27.000000X oscillator. It ensures that the output signal has both the correct frequency and accuracy. The pulse-width modulation (PWM) technique is used in the frequency divider, meaning that it is able to change the cycle time per pulse depending on the specified duty cycle. This ensures that the desired frequency accuracy is obtained no matter the condition or temperature.

Conclusion

The SIT1602BI-31-30S-27.000000X oscillator family is specifically designed for precision frequency applications that require accurate and reliable timing over a wide range of temperatures and conditions. Its design combines a voltage-controlled oscillator with a frequency divider to achieve superior performance in terms of phase accuracy, low power consumption and long term stability while meeting the stringent requirements of applications such as computer hard drives, industrial equipment and wearables.

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