FD1220015

Frequency Stability:	±50ppm
Current - Supply (Disable) (Max):	10µA
Height - Seated (Max):	0.051" (1.30mm)
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):	15mA
Operating Temperature:	-40°C ~ 85°C
Series:	SaRonix-eCera™ FD
Voltage - Supply:	3.3V
Output:	CMOS
Function:	Enable/Disable
Frequency:	12.288MHz
Type:	XO (Standard)
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Bulk

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Oscillators: FD1220015 Application Field and Working Principle

Oscillators are electronic circuit components used in many different types of applications. They are used to create a varying output signal with a predictable periodicity. The FD1220015 oscillator is a type of oscillator designed for specific applications. In this article, we will discuss the application field of the FD1220015 and its working principle.The FD1220015 oscillator is mainly used in various switching power supplies. A switching power supply makes use of a solid-state switch (normally either a power MOSFET or IGBT) to rapidly switch power onto a storage capacitor as energy demand changes. As the load changes, the frequency of the switch also needs to change. The FD1220015 oscillator is used to monitor and control the frequency of the switching transistors, thus helping maintain the current through the output of the power supply.The FD1220015 oscillator also has other applications. It can be used in the implementation of precise frequency synthesizers, radio frequency signal generators, and other adjustable frequency circuitry. To make the most of the oscillator, it is important to understand its working principle.The FD1220015 oscillator uses a self-oscillating bridge configuration in order to generate independent, adjustable oscillations. It consists of two pairs of transistors: one pair (the ‘bridge arms’) connected in series between the power supply rails, and the other pair (the ‘diode clamp transistors’) connected in parallel across the supply rails. The pulse-width signal at the junction between the two diodes is fed back to a comparator, where it is compared to a reference voltage. If the voltage difference is too small, the oscillator won’t start. If there is enough voltage difference (the ‘trigger level’), a pulse is generated, which charges the storage capacitor mounted at the bridge.This is quickly followed by a period of discharge, which starts when the voltage across the diode clamp transistors drops below the trigger level. An external resistor and capacitor can be used to set the oscillation frequency of the oscillator. The oscillator starts in a low state when no external resistor or capacitor are connected, and the default triggering level is set by an internal trim potentiometer.The FD1220015 oscillator can generate frequencies up to 500 kHz, with an output voltage of up to 12 V. It also has an excellent parameter stability even under changing temperatures, thanks to its on-chip temperature compensation. Its low noise, steady switching frequency, and high stability make it ideal for various switching power supply applications.In summary, the FD1220015 oscillator is a versatile tool for many applications. It uses a self-oscillating bridge configuration, allowing for an independent and adjustable oscillation frequency. Its excellent parameter stability and high output voltage make it an ideal choice for switching power supplies, frequency synthesizers, radio frequency signal generators, and other adjustable frequency circuitry.

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