SIT1602AC-21-18S-26.000000D

Frequency Stability:	±20ppm
Current - Supply (Disable) (Max):	1.3µA
Height - Seated (Max):	0.032" (0.80mm)
Size / Dimension:	0.126" L x 0.098" W (3.20mm x 2.50mm)
Package / Case:	4-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	3.9mA
Operating Temperature:	-20°C ~ 70°C
Absolute Pull Range (APR):	--
Series:	SiT1602
Voltage - Supply:	1.8V
Output:	LVCMOS
Function:	Standby (Power Down)
Frequency:	26MHz
Type:	XO (Standard)
Base Resonator:	MEMS
Part Status:	Not For New Designs
Packaging:	Tape & Reel (TR)

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Introduction

Sit1602AC-21-18S-26.000000D, or SIT for short, is an oscillator belonging to the RMS (root mean square) oscillator family. The oscillator\'s primary purpose is to generate an electrical signal of predetermined frequency and amplitude for various applications. The oscillator works by generating an output signal from an oscillator core and then applying a feedback signal to it, which, when combined with the amplifier stage, provides a constant output frequency. The oscillator can also be used as a modulator, allowing for the synthesis of complex waveforms.

Features of SIT

SIT oscillators are characterized by several features. First, their output waveforms are sinusoidal. This makes them useful for many applications where the precision of the waveform is important. Second, they have a wide frequency range and high accuracy with minimal errors. As a result, they are suitable for use in frequency or amplitude modulation applications. Third, SIT oscillators have a high degree of stability, which allows them to be used in medical, communication, and navigation applications.

Application Field

SIT oscillators are widely used in a variety of applications, including medical systems, communication systems, navigation systems, and consumer electronics. In medical systems, they are used for monitoring the heart rate or other vital signs of a patient. In communication systems, they are used for frequency modulation (FM) and amplitude modulation (AM), as well as for analog-to-digital and digital-to-analog signal processing. In navigation systems, they are used for GPS receivers, navigation systems, and automatic instrument landing systems (ILS). In consumer electronics, they are used for gaming systems, televisions, and sound systems.

Working Principle

SIT oscillators work on the principle of van der Pol–Zener (VdPZ) effect, which is a type of nonlinear electrical phenomenon. The oscillation is generated by the interaction between two capacitors connected in parallel, one positive and one negative. When a periodic voltage is applied to the circuit, the positive and negative capacitors alternately discharge and recharge, creating an oscillating electrical signal. The frequency of the oscillation is determined by the capacitance, and the amplitude is determined by the resistance of the circuit. By changing the capacitance and resistance, the frequency and amplitude of the output signal can be controlled.

Conclusion

SIT oscillators are widely used in many applications, from medical systems to consumer electronics. They are characterized by their wide range of frequency and high accuracy, making them ideal for frequency and amplitude modulation applications in communication systems. The oscillator works on the principle of the van der Pol–Zener (VdPZ) effect, where two capacitors alternately discharge and recharge in response to an applied voltage, creating an oscillating signal. By changing the circuit components, the frequency and amplitude of the output signal can be controlled.

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