LCF121002D900TG Filters

Series:	LCF
Packaging:	Tape & Reel (TR)
Part Status:	Active
Filter Type:	Signal Line
Number of Lines:	2
Impedance @ Frequency:	90 Ohms @ 100MHz
Current Rating (Max):	160mA
DC Resistance (DCR) (Max):	4 Ohm
Voltage Rating - DC:	--
Voltage Rating - AC:	--
Operating Temperature:	-40°C ~ 85°C
Ratings:	--
Approvals:	--
Features:	--
Mounting Type:	Surface Mount
Size / Dimension:	0.050" L x 0.039" W (1.27mm x 1.00mm)
Height (Max):	0.026" (0.65mm)
Package / Case:	0504 (1210 Metric), 4 Lead

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Common Mode Chokes

Common mode chokes, which are also known as line filters, are electrical components used in electronic circuits and applications that contain more than one connection to a signal ground. Common mode chokes are commonly used to reduce common mode interference noise on data/signal lines. Therefore, they are also known as signal line chokes or common mode filter chokes. Generally speaking, common mode chokes are used in applications such as switch-mode power supplies, data and signal lines, motor drives, and telecommunications.The LCF121002D900TG is a common mode choke. It is used to suppress common mode noise and has a wide application range for a variety of applications. Specifically, this common mode choke is commonly used in high frequency, wide band radio frequency amplifier circuitry and power supplies.The LCF121002D900TG common mode choke employs a unique, low-cost package design that allows the common mode filter to operate in a wide frequency range while achieving high common-mode noise rejection. This package design also allows multiple LCF121002D900TG filters to be placed together to provide additional noise suppression and better overall performance. The LCF121002D900TG filter also features an inner core that uses a combination of high energy and high-permeability materials to reduce the EMI/RFI noise common to all electronic products.The basic principle behind a common mode choke is to allow the transmission of the signal in one direction while blocking the return path of the signal. This is done by placing a ferrite-core inductor in series with the transmission line. The ferrite core acts as an inductor and provides the necessary impedance to suppress the transmission of high-frequency noise signals in the return direction.The LCF121002D900TG common mode choke also utilizes an advanced common-mode filtering technique that utilizes an open-circuit technique. This technique involves placing a capacitor between the two pins of the inductor to form a resonant circuit. This resonant circuit resonates at a specific frequency, thus allowing only the transmission of a single harmonic component at a specific frequency while suppressing all other noise and interference signals.In summary, the LCF121002D900TG common mode choke combines low cost and high performance to address the need for reducing common mode noise on data/signal lines. It employs a unique combination of inductor and capacitor to reduce EMI/RFI noise common to all electronic products. The open-circuit technique incorporated by the LCF121002D900TG to filter out unwanted noise is an effective technique that further reduces unnecessary noise on data/signal lines.

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