SIT9005ACT2G-33NN

Frequency Stability:	±20ppm, ±25ppm, ±50ppm
Height:	0.030" (0.76mm)
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):	6.5mA
Spread Spectrum Bandwidth:	-3.71%, Down Spread
Operating Temperature:	-20°C ~ 70°C
Frequency Stability (Total):	--
Series:	SIT9005
Voltage - Supply:	3.3V
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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Programmable Oscillators - SIT9005ACT2G-33NN application field and working principle

Programmable oscillators are a special kind of oscillators which can be programmed to generate a very specific frequency with a simple communication interface such as SPI, USB, etc. The SIT9005ACT2G-33NN is a resonant crystal such type of programmable oscillator which uses a quartz crystal resonant element in combination with a wide range of parameters to provide accuracy and stability. This device is ideally suited for time and frequency applications, especially sensitive telecommunications applications and high-precision metering and measuring purposes.The SIT9005ACT2G-33NN is robustly built and uses an advanced on-chip arithmetic logic unit to program frequency with a resolution of 0.5 ppm. It offers precise accuracy, fast lock times, temperature stability, and superior power supply sensitivity. Additionally, this oscillator can work within a temperature range of -40 to +85 ˚C and it has an economical packing size of 10x5x2.5 mm.The basic functionality and working principle of the SIT9005ACT2G-33NN are quite simple. Quartz crystal is the main frequency-determining element. An in-built frequency-stabilizing circuit, also referred to as feedback oscillator, helps to maintain a precise frequency even when subjected to temperature variation and other environmental factors. The control of the frequency is achieved by a combination of two capacitors and two resistors which act as the main programmable interface to the oscillator. The working principle of the SIT9005ACT2G-33NN crystal oscillator is based on its frequency-stabilizing circuit which consists of two logic gates and a voltage-controlled oscillator (VCO). The logic gates act as a buffer and a phase-locked loop circuit. This phase-locked loop circuit helps the VCO to lock its output frequency to a specific frequency determined by the quartz crystal. The VCO takes a steam of input pulses at a very high frequency and measures the phase shift then converts it into an adjustable control voltage. This voltage is then used to stabilize the output frequency of the oscillator.The SIT9005ACT2G-33NN is quite useful in many scenarios including audio, home theatre systems, broadband communications, automotive infotainment, GPS navigation, and shortwave radios. It is known for its rugged design, high accuracy, stability, extensive temperature range, excellent phase noise characteristics, and low power consumption. It is highly reliable and can be programmed to provide multiple frequency outputs from its single quartz element.In conclusion, the SIT9005ACT2G-33NN is a highly reliable and accurate programmable oscillator which uses a quartz crystal resonant element combined with a wide range of programming parameters to provide accuracy and stability. Its working principle is based on the phase-locked loop circuit and it can deliver multiple frequency outputs from a single quartz. This oscillator is widely used in various electronics applications including audio, home theatre systems, broadband communications, navigation systems, and more.

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