SIT9005ACE1H-28DF

Frequency Stability:	±20ppm, ±25ppm, ±50ppm
Height:	0.030" (0.76mm)
Size / Dimension:	0.098" L x 0.079" W (2.50mm x 2.00mm)
Package / Case:	4-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	6.5mA
Spread Spectrum Bandwidth:	±0.765%, Center Spread
Operating Temperature:	-20°C ~ 70°C
Frequency Stability (Total):	--
Series:	SIT9005
Voltage - Supply:	2.8V
Output:	LVCMOS
Function:	--
Available Frequency Range:	1MHz ~ 141MHz
Programmable Type:	Programmed by Digi-Key (Enter your frequency in Web Order Notes)
Type:	SSXO
Base Resonator:	MEMS
Part Status:	Active

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IntroductionProgrammable oscillators are an essential component of modern electronic systems, as they enable precise timing of digital signals in a variety of applications. The SIT9005ACE1H-28DF is a specialized oscillator designed for applications where long-term accuracy and stability are essential. This article will discuss the application field and working principle of this device. Application FieldThe SIT9005ACE1H-28DF is an oscillator designed for high-accuracy timing applications. It has a frequency range of 1.2 to 250MHz and is available in packages of various sizes. Its features include low jitter, low phase noise and low temperature stability. This oscillator is ideal for applications such as Wi-Fi, image processing, digital video broadcasting, GPS, embedded systems and communication base stations.Working PrincipleThe SIT9005ACE1H-28DF is a programmable oscillator, meaning it can be programmed to run at different frequencies and output different waveforms. It uses an analog phase-locked loop (PLL) to generate precise frequencies. The PLL consists of an input divider, a voltage-controlled oscillator (VCO), a loop filter, and a phase detector.The input divider divides the incoming signal into two parts with different frequencies. The VCO produces an output signal with a frequency that depends on the input. The loop filter shapes the output of the VCO to reduce noise and other unwanted signals. Finally, the phase detector compares the output of the VCO to the input and adjusts the input divider to correct for any differences in frequency. This loop is repeated until the desired frequency and accuracy are achieved.The SIT9005ACE1H-28DF also has a temperature-compensated crystal oscillator (TCXO) which helps improve the stability and accuracy of the output signal. The TCXO consists of an oscillator, a temperature sensor and a compensation circuit. The oscillator generates a reference signal which is then compared to the output signal by the temperature sensor. The compensation circuit will adjust the output to ensure that the output signal is regulated to minimize temperature-related drift.ConclusionThe SIT9005ACE1H-28DF is a programmable oscillator designed for high-accuracy timing applications, such as Wi-Fi, image processing, digital video broadcasting, GPS, embedded systems and communication base stations. It uses an analog PLL and a TCXO, which enable it to maintain a precise frequency over a wide temperature range. This device is the ideal choice for applications that require precision and stability.

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