FJY3005R Discrete Semiconductor Products

DC Current Gain (hFE) (Min) @ Ic, Vce:	30 @ 5mA, 5V
Base Part Number:	FJY3005
Supplier Device Package:	SOT-523F
Package / Case:	SC-89, SOT-490
Mounting Type:	Surface Mount
Power - Max:	200mW
Frequency - Transition:	250MHz
Current - Collector Cutoff (Max):	100nA (ICBO)
Vce Saturation (Max) @ Ib, Ic:	300mV @ 500µA, 10mA
Series:	--
Resistor - Emitter Base (R2):	10 kOhms
Resistor - Base (R1):	4.7 kOhms
Voltage - Collector Emitter Breakdown (Max):	50V
Current - Collector (Ic) (Max):	100mA
Transistor Type:	NPN - Pre-Biased
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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The FJY3005R is a pre-biased, single-transistor amplifier integrated circuit (IC) manufactured by Fairchild Semiconductor. It is one of the most commonly used amplifiers in modern electronic systems, since it offers high efficiency and reliable operation.Technically speaking, the FJY3005R is a bipolar junction transistor (BJT), which means that two PNP and two NPN transistors are placed side-by-side and wired in a specific configuration. This specific configuration is called the "common-collector" configuration, and it ensures that the collector-emitter voltage is equal to the input voltage. This allows the FJY3005R to provide a high-gain current buffer for voltage amplifiers, as well as for audio amplifiers, voltage followers, and current mirrors.The FJY3005R is ideal for use in demanding applications such as instrumentation, communication systems, control systems, and automotive applications, where high-gain and high bandwidth performance are needed. Additionally, the FJY3005R offers low noise and low distortion, thanks to its three-stage cascode configuration.When it comes to its working principle, the FJY3005R is a typical BJT amplifier. To start with, the input signal is applied to the base, which will in turn control the base current. The base current then flows through the emitter-collector junction and is amplified by the transistor\'s gain. This gain is determined by the ratio of the flow of current through the collector and emitter terminals, which is referred to as the current gain (hFE), and is typically specified in the datasheet.The FJY3005R operates on a single power supply, and its voltage and current rating can be adjusted by changing the supply voltage. Additionally, the FJY3005R also has an internal offset voltage of approximately 2.5 V, that can be used to bias the amplifier in the desired way. This offset voltage can be adjusted by changing the gain of the amplifier through an external feedback network.Finally, the FJY3005R has a bipolar junction transistor (BJT) output stage designed for optimal efficiency and linearity. This output stage helps to eliminate the need for an additional external driver circuit.Overall, the FJY3005R is a versatile and reliable pre-biased BJT amplifier, which can be used in a variety of applications. It is ideal for use in demanding applications where high gain, bandwidth, and efficiency are needed. Additionally, thanks to its three-stage cascode configuration, the FJY3005R offers low noise and distortion. Its offset voltage and adjustable gain make it easy to bias the amplifier in the desired way, while the output stage negates the need for an external driver circuit.

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