ELK-EA220FA Filters

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EMI/RFI filters, like LC, RC networks, are widely used in digital systems because of their ability to suppress unwanted noise and interference. The ELK-EA220FA is a two-channel, dual-sided surface-mount EMI/RFI filter that offers linear performance from DC to beyond 1 GHz.

This filter is most typically used in applications that require good noise suppression performance and low insertion loss. It is especially suitable for power/data lines, and it is designed to be easily mounted on PCBs. Once installed, it offers significant protection from emissions and interference.

The ELK-EA220FA is designed to provide broad-band performance and low insertion loss. It is capable of achieving greater than 65 dB of insertion loss and typically greater than 85 dB of common-mode suppression, making it suitable for applications requiring improved immunity to EMI/RFI noise.

To understand the filter’s working principle, it is useful to understand its component design. The filter consists of two parts: an input resistor network and an output capacitor network. The resistor network is designed to reject common-mode and differential-mode interference, while the capacitor network is designed to reject high-frequency noise.

The filter’s input resistor network is designed with a differential pair of series resistors in order to reject common-mode and differential-mode noise. The resistor network has high frequency roll-off characteristics, which means that it is capable of rejecting high-frequency noise that is in the 10 MHz to 1 GHz range.

The filter’s output capacitor network is designed with a series array of capacitors in order to reject high-frequency noise. The capacitor network also has high frequency roll-off characteristics, providing a loss of insertion greater than 65 dB and typically greater than 85 dB of common-mode suppression.

The combination of the input resistor network and the output capacitor network provides the filter with a broadband performance from DC to beyond 1 GHz. This allows the filter to reduce emissions and interferences significantly, making it suitable for use in power/data lines.

The ELK-EA220FA is a good choice for applications requiring improved immunity to EMI/RFI noise as it is designed to provide broad-band performance and low insertion loss. Its differential pair of series resistors along with its series array of capacitors help it reject common-mode and different-mode noise, making it especially suitable for power/data lines.

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