NZF220DFT1 Filters

Resistance - Channel (Ohms):	110
Height:	0.043" (1.09mm)
Size / Dimension:	0.079" L x 0.049" W (2.00mm x 1.25mm)
Package / Case:	5-TSSOP, SC-70-5, SOT-353
Mounting Type:	Surface Mount
Voltage - Rated:	--
Applications:	Data Lines for Mobile Devices
Operating Temperature:	--
ESD Protection:	Yes
Values:	R = 110 Ohms, C = 22pF
Series:	--
Attenuation Value:	--
Center / Cutoff Frequency:	220MHz (Cutoff)
Number of Channels:	2
Technology:	RC (Pi)
Filter Order:	2nd
Type:	Low Pass
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

EMI/RFI filters are commonly used to reduce the amount of electromagnetic interference (EMI) emitted from electrical and electronic equipment. The filters employ series/parallel resistor-capacitor (RC) networks to filter off any high-frequency components that can be radiated or conducted into other sensitive equipment and causing interference. The NZF220DFT1 is a popular EMI/RFI filter designed for a wide selection of applications.

Application Field

The NZF220DFT1 works as a high-performance EMI/RFI filter designed for numerous applications, such as consumer electronics, broadband communication, medical instruments, and data processing. This filter features an extended -50 dB bandwidth and excellent differential-mode current-limiting capabilities to prevent EMI radiations and rectified radio frequency interference. With the low cutoff frequency option, the filter also provides minimal insertion loss at extreme low frequencies, commonly found in cell phone applications.

Working Principle

The NZF220DFT1 series filter works on two principal principles. Firstly, it works to filter out any high-frequency components that can be radiated or conducted into other sensitive equipment; secondly, the filter also offers minimal insertion loss at extreme low frequencies, commonly found in cell phone applications. Thefilter is constructed using two independent capacitor-resistor-capacitor (CRC) networks connected in series, and the resistors are connected in parallel. The filter elements are housed in an aluminum enclosure that provides a good thermal and electrical connection. The enclosure is sealed to ensure that the filter elements remain in place and offer maximum safety. The enclosure also serves as an effective shield to block any electromagnetic interference.The active filter elements of the NZF220DFT1 consist primarily of inductors and capacitors. The inductors block high frequencies, while the capacitors provide a low-impedance path for low frequencies. The combination of the two filter elements reduces any unwanted signals in the form of EMI and RFI, allowing the correct signals to pass through. The inductors of the filter also offer current-limiting capabilities.

Conclusion

The NZF220DFT1 is an excellent EMI/RFI filter designed for multiple applications. It features two independent CRC networks connected in series and highly effective filter elements that block unwanted signals. The combination of these two factors, plus an effectively sealed enclosure, create a highly reliable and efficient filter suitable for various applications such as consumer electronics, broadband communication, medical instruments, and data processing.

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