FDS3812

Series:	PowerTrench®
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
FET Type:	2 N-Channel (Dual)
FET Feature:	Logic Level Gate
Drain to Source Voltage (Vdss):	80V
Current - Continuous Drain (Id) @ 25°C:	3.4A
Rds On (Max) @ Id, Vgs:	74 mOhm @ 3.4A, 10V
Vgs(th) (Max) @ Id:	4V @ 250µA
Gate Charge (Qg) (Max) @ Vgs:	18nC @ 10V
Input Capacitance (Ciss) (Max) @ Vds:	634pF @ 40V
Power - Max:	900mW
Operating Temperature:	-55°C ~ 175°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SO

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FDS3812 Application Field and Working Principle

The FDS3812 is an Integrated Circuit (IC) from Fairchild Semiconductor designed for a variety of transistor applications. It is part of a family of multiple-gate transistors, which are commonly used for digital signal processing, dynamic power management, and analog signal-conditioning tasks. This particular device is a high-performance low-cost solution that offers gate-level control of current flow in high-gain, high-speed amplifiers.The FDS3812 has a total of three pins, two of which are control inputs and one is an output. The control inputs receive signals from a microcontroller or other processor, while the output is connected to the gate-level transistor in the associated circuit. With the inputs enabled, the FDS3812 can be used to effectively regulate current flow into and out of a circuit. It can also be used to reduce "overdrive", the excessive power consumed by the circuit when a high amount of current is flowing.The FDS3812 is a dual-gate array, which allows two signal sources to be connected to the same transistor. This allows the outputs from two independent signal sources to be combined, creating a single output signal with improved signal-to-noise ratio, accuracy, and gain. This device is also known for its low power consumption and high speed, both of which are essential for modern electronics applications.The FDS3812 has a rather simple operation principle, as the two control inputs provide an instruction to the transistor array. When current is applied to the input pins, the transistor array will then determine the amount of current that can flow through the gates. The output current is then determined by the voltage difference between the control inputs and the output. As the voltage difference between the control inputs and the output increases, the gain of the transistor array also increases.The FDS3812 is a versatile and powerful IC, allowing engineers to create customized multiple-gate transistors that can be used in a variety of applications. For example, this device can be used in low-noise amplifier and frequency multiplier circuits, as well as in data converters, switch driver circuits, and voltage regulators. The FDS3812 can also be combined with other components, such as logic gates, to create complex digital systems.In conclusion, the FDS3812 is a powerful, versatile and low-cost IC for multiple-gate transistor applications. It is capable of providing excellent gate-level current control and reducing "overdrive". Furthermore, its dual-gate array has made it a popular choice for signal conditioning and power management tasks. With its numerous uses and simple operational principle, the FDS3812 is an important component for analog circuit designers.

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