SMVA1253-079LF Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance @ Vr, F:	4.8pF @ 4.7V, 50MHz
Capacitance Ratio:	12.3
Capacitance Ratio Condition:	C0.3/C4.7
Voltage - Peak Reverse (Max):	15V
Diode Type:	Single
Q @ Vr, F:	350 @ 3V, 50MHz
Operating Temperature:	-55°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23

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Introduction
SMVA1253-079LF is a diode that falls under the category of Variable Capacitance or Varicaps. They are also referred to as Varactors, and are used in a variety of applications ranging from radio frequency tuning to Timings and Tune Sensing. This device’s main feature is the ability to change its capacitance. It allows for the control of an ac signal’s amplitude, frequency and phase. Incorporated into many electronic designs, it’s an effective solution for its parameters.SMVA1253-079LF Overview
The SMVA1253-079LF is a type of varicap diode. It has a reverse breakdown voltage of 70 volts, which is the threshold where voltages rise quickly when the applied voltage increases. This is a reverse-biased diode and works by making use of a capacitive charge built up between the junction plates. When the reverse voltage is applied to the capacitor, the capacitance of the device is varied. Characteristics
The SMVA1253-079LF has a wide range of adjustment in its capacitance, with a max capacitance of 7.9 pF.It also has a high operating temperature of -5°C to 85°C. This allows it to remain stable in high-temperature environments and still maintain its performance. In addition, it has a relatively lower forward leakage current, making it more efficient and stable when in operation.Applications of SMVA1253-079LF
The SMVA1253-079LF is commonly used in Radio Frequency Tuning. Its adjustable capacitance makes it incredibly useful for tuning circuits in radio receivers. It is also used for timing circuits where precise frequencies are needed for proper functioning. The SMVA1253-079LF also finds uses in automotive applications such as alternators, CD players and other pulse-width modulation applications.Working Principle of SMVA1253-079LF
SMVA1253-079LF works by allowing the voltage across the device to vary its capacitance. The capacitance is inversely related to the voltage, so when the voltage increases, the capacitance decreases. This is achieved by the junction or depletion layer between the junction plates. The layer varies in width and thickness based on the applied voltage.When a signal is fed into the SMVA1253-079LF, the signal causes a variation in the capacitance. This variation in capacitance affects the signal’s amplitude, frequency, and phase. This allows for precise tuning and manipulation of the signal.Conclusion
The SMVA1253-079LF is a variable capacitance or varicap diode that is used in various applications. It has adjustable capacitance, and can be used for tuning in RF devices, as well as timing and pulse-width modulation. It relies on the voltage across its junction to vary the capacitance and can be used to adjust the amplitude, frequency, and phase of a signal.

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