MEM1608D401RT001

Current:	200mA
Height:	0.028" (0.70mm)
Size / Dimension:	0.063" L x 0.032" W (1.60mm x 0.80mm)
Package / Case:	0603 (1608 Metric), 3 PC Pad
Mounting Type:	Surface Mount
Voltage - Rated:	6.3V
Applications:	Data Lines for Mobile Devices
Operating Temperature:	-40°C ~ 85°C
ESD Protection:	No
Values:	--
Series:	MEM
Resistance - Channel (Ohms):	--
Attenuation Value:	--
Center / Cutoff Frequency:	400MHz (Cutoff)
Number of Channels:	1
Technology:	LC (T-Type)
Filter Order:	2nd
Type:	Low Pass
Part Status:	Active
Packaging:	Tape & Reel (TR)

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EMI/RFI Filters (LC, RC Networks)

Electromagnetic interference (EMI) and radio frequency interference (RFI) can have damaging effects on the electrical components in an electronic circuit, such as those used in MEM1608D401RT001. These electromagnetic interferences are caused by external sources, such as electric motors, high power radio or TV broadcast stations, power lines and welding machines. An efficient and effective way to combat against these interferences is to use EMI/RFI filters. One popular type of filter used in different applications is an LC filter, which is the short form of an inductor-capacitor filter. An LC filter is largely made up of inductors and capacitors. The inductors are in series and the capacitors are in parallel along the circuit, creating a low-pass filter that attenuates high frequency signals. At lower frequencies, the capacitor acts as a short circuit, allowing for signal to pass through. At higher frequencies, the inductor acts as a short, blocking the high frequency signals. RC filters, which use resistors and capacitors, are also used in applications requiring EMI/RFI protection. This kind of filter is a high-pass filter in which high frequency signals are insulated from lower frequency signals. The MEM1608D401RT001 circuit needs to have EMI/RFI protection due to its sensitivity to interference from external sources. Here, an LC filter has proven to be the most efficient and cost effective solution. The filter consists of three series inductors (L1, L2, L3), with one parallel capacitor acting as an output (C1). These components attenuate the EMI/RFI signals, enabling the circuit to perform optimally. By forming a complex series-parallel arrangement, the filter establishes a custom cutoff frequency for the application, blocking out high frequency signals, but still allowing for a pass through rate of low frequency signals.The working principle of an LC filter can be explained using an example of a tank circuit. In the circuit, an inductor is placed in series with a capacitor, forming a tank circuit that resonates when power is added. This enables the circuit to act as a filter, allowing for the required frequencies to pass through the system. The combination of an inductor and a capacitor allows the filter to have the property of frequency selectivity since the series and parallel combination is tuned to the particular frequency of the circuit. It also has a better performance in comparison to an RC filter due to its higher attenuation at lower frequencies.In conclusion, EMI/RFI filters can be a great way to ensure that circuits, such as the MEM1608D401RT001, are well protected against electromagnetic interference. LC filters are the most popular and cost effective solutions, due to their frequency selectivity and ability to attenuate the signals. RC filters are also viable options for EMI/RFI protection, as they filter out high frequency signals, providing effective insulation from the interference.

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