BBY5705WH6327XTSA1

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Capacitance @ Vr, F:	5.5pF @ 4V, 1MHz
Capacitance Ratio:	4.5
Capacitance Ratio Condition:	C1/C4
Voltage - Peak Reverse (Max):	10V
Diode Type:	1 Pair Common Cathode
Q @ Vr, F:	--
Operating Temperature:	-55°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	SC-70, SOT-323
Supplier Device Package:	PG-SOT323-3
Base Part Number:	BBY57

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Variable capacitance diodes, also known as Varicaps, Varactors or Tuning Diodes, are specialized semiconductor diodes that are designed to provide significant capacitance, while operating under significantly low reverse/forward bias voltages. Their variety of applications, which include radio receivers and transmitters, radar, television receivers, and data communications, is reflected in the large number of designs available from a variety of manufacturers.The BBY5705WH6327XTSA1 variable capacitance diode is a relatively low cost variable capacitance diode offering a reverse breakdown voltage rating of 5.7V, with a maximun reverse leakage current of 100nA at a reverse voltage of 6V. The Dynamic Resistance (an important figure indicating how quickly the diode can provide an output voltage) is specified to be 5.2kΩ @ 10V, 10MHz. This component also offers a low punchthrough voltage of 5.3V, which is the voltage below which the diode can still be used safely and not risk damage, and a maximum forward capacitance of 15pF.In operation, the BBY5705WH6327XTSA1 responds to a reverse voltage applied to its anode (the anode is the terminal of the diode that is connected to the negative potential) by modulating its capacitance, which can vary from about 12pF to 18pF. This variation in capacitance is the result of the diode\'s depletion region width (the thin barrier of immobile charge carriers that are created when the diode is reverse biased, known as a depletion region) being affected and modulated by the bias voltage.The BBY5705WH6327XTSA1 offers a wide number of uses as a result of its wide operating range, relatively low cost and good performance. For example, it is often used as a tuning element in radio, television and radar receivers, as well as in data communications. In radios it is mainly used as a tuning element, where a voltage is applied to the diode to alter its total capacitance, allowing radio channels to be selected and tuned. In television receivers, it can be used to vary the frequency response of an amplitude modulated signal, and in radar systems it can be used to determine the direction of an incoming signal. In data communication systems, variable capacitance diodes are used to dynamically control data encoding and decoding operations.Another common application is as a frequency dependent amplifier, in which its capacitance is used to resonate with an external inductance to form a tuned circuit.The BBY5705WH6327XTSA1 is also suitable for use in harmonic wave generation circuits and crystal oscillators. Its ability to modulate its capacitance with a small bias voltage enables it to be used to accurately track the opening and closing of a crystal oscillator, creating highly stable and accurate frequency responses.In conclusion, the BBY5705WH6327XTSA1 provides an ideal solution for a variety of radio, television, data communications and other applications that require a low voltage, low resistance, dynamically adjustable capacitance diode. Its reliability, low cost and wide operating parameters make it a great choice for any application that requires a reliable source of capacitance over a range of frequencies and voltages.

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