BB189,315

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Capacitance @ Vr, F:	2.18pF @ 25V, 1MHz
Capacitance Ratio:	6.3
Capacitance Ratio Condition:	C2/C25
Voltage - Peak Reverse (Max):	32V
Diode Type:	Single
Q @ Vr, F:	--
Operating Temperature:	-55°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	SC-79, SOD-523
Supplier Device Package:	SOD-523
Base Part Number:	BB189

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Introduction

Diodes - Variable Capacitance (Varicaps, Varactors) are semiconductor devices with a variable electrical capacitance. They are widely used for frequency modulation, voltage stabilizing, radio and television tuning, and wave shaping. The BB189,315 is an example of a Diodes - Variable Capacitance. This paper will discuss the application and working principle of the BB189,315.

Application

The BB189,315 is a bidirectional, unitary transfer diode as an alternative to standard varactors. It features higher linearity over a wide operating range. This feature makes the device a practical choice for applications such as AM and FM demodulation, photoelectric transducers and pulse generation and drive. The BB189,315 varactor offers a frequency range of 0.5-600 MHz, overvoltage protection of 50 V, and low insertion loss. The ease of use and versatility make the BB189,315 a versatile solution for commercial as well as industrial applications.

Working Principle

The BB189,315 is a bidirectional, unitary transfer diode with an adjustable capacitance. The voltage across the diode is the key parameter for controlling the amount of capacitance. The amount of capacitance is determined by the amount of charge that flows between the diode’s anode and cathode electrodes. The greater the voltage, the more charge will be transferred and the greater the capacitance. The BB189,315 is also capable of operating at both low and high voltages, allowing it to be used in a variety of applications. The BB189,315 varactor operates by allowing the electrons to tunnel through the junction when sufficient voltage is applied. This tunneling effect creates an electric field on either side of the junction, effectively creating two capacitors. The amount of capacitance can then be adjusted by changing the voltage applied; greater voltage will increase the tunneling current and create a more capacitive effect. This makes the BB189,315 a versatile choice for applications requiring precise frequency control.

Conclusion

The BB189,315 is a Diodes - Variable Capacitance, or varicap, that offers superior linearity over a wide operating range. It is a bidirectional, unitary transfer diode, making it a practical choice for several applications requiring precise frequency control. The amount of capacitance is determined by the amount of charge that flows between the diode’s anode and cathode electrodes when the voltage is applied. The versatile BB189,315 is suitable for applications such as AM and FM demodulation, photoelectric transducers, pulse generation and drive.

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