AP2S2ER

Series:	AP2S
Packaging:	Bulk
Part Status:	Active
Base Resonator:	Crystal
Type:	XO (Standard)
Programmable Type:	Programmed by Digi-Key (Enter your frequency in Web Order Notes)
Available Frequency Range:	3MHz ~ 75MHz
Function:	Standby
Output:	CMOS
Voltage - Supply:	1.8V
Frequency Stability:	--
Frequency Stability (Total):	±25ppm
Operating Temperature:	-20°C ~ 70°C
Spread Spectrum Bandwidth:	--
Current - Supply (Max):	8mA
Ratings:	--
Mounting Type:	Surface Mount
Package / Case:	4-SMD, No Lead
Size / Dimension:	0.098" L x 0.079" W (2.50mm x 2.00mm)
Height:	0.035" (0.90mm)

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Programmable Oscillators: AP2S2ER Application Field and Working Principle

Programmable oscillators are useful for applications requiring frequency control over a range of frequencies or amplitudes. Specifically, AP2S2ER is a type of programmable oscillator, which allows users to obtain a precise output frequency either held constant or controlled by a voltage signal, by means of an internal phase-locked loop circuit. AP2S2ER is suitable for various applications, such as communication, aerospace and medical electronics, as it offers excellent performance in terms of phase noise, spurious modes and power dissipation, as well as a wide tuning range and extremely fast response time.The AP2S2ER comprises a series of basic components which all work together in order to help the user control the frequency and amplitude of their output signal. These components include a voltage-controlled oscillator (VCO), a frequency divider, a reference frequency source, an automatic gain control circuit, a mixer and a phase-sensitive detector.The VCO generates an output signal at a precisely specified frequency. The frequency of the signal can be varied by applying a voltage-controlled input signal to the VCO. This signal is then divided by a frequency divider to divide the output signal down to an appropriate frequency for the following stages.The reference frequency source provides an input signal to the phase-locked loop circuit, whose output goes to the automatic gain control (AGC) circuit and the mixer stage of the AP2S2ER oscillator. The AGC circuit adjusts the amplitude of the input signal if there is any distortion. The mixer then mixes the two signals, adjusted by the AGC stage, and produces the output signal at the specified frequency.Finally, the phase-sensitive detector monitors any small deviations in the output signal frequency relative to the reference frequency and adjusts the control voltage on the VCO accordingly. This helps to keep the output frequency constant over time, even in environments where the power supply voltage may fluctuate.In conclusion, AP2S2ER is a reliable, efficient and robust programmable oscillator which helps users to accurately obtain an output signal at the desired frequency. The wide frequency range and fast response time makes AP2S2ER suitable for a variety of applications, in particular communication, aerospace and medical electronics.

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