1270-016

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EMI/RFI filters (LC, RC networks) are utilized to protect communications (analog and digital) systems from electromagnetic interference (EMI) or its variant, radio frequency interference (RFI). Different types of these filters, from basic LC to more complex RC networks, offer different levels of protection and can be applied to a variety of applications. Specifically, 1270-016, an RC Network-based EMI/RFI filter, is suitable for ensuring signal integrity in high-speed data transmission applications.

Description of the 1270-016 filter

The 1270-016 filter is an established EMI/RFI filter designed for data communication applications that operate at up to 1 GHz. Measures 5.5 x 6 x 2.3” in size, the filter consists of an RC network with capacitors to provide a high level of common mode and differential mode signal rejection, allowing the filter to be applied in noisy environments. Additionally, the filter boasts excellent return loss, ESD protection, creepage and clearance as compliant to UL94-V0 and meets the requirements of IEC/EN 61000-4-2, as well as various other industry standards. The filter also offers an attenuation of > 40 dB up to 1.0 GHz, making it suitable for protecting data transmission systems from EMI/RFI.

Application Field and Working Principle of the 1270-016 Filter

The RC network-based 1270-016 filter is suitable for many types of data communications systems, such as RS-232, RS-422, RS-485, HDMI, FIBER, Ethernet, and Fibre Channel. It is designed to operate in noise-sensitive applications by suppressing both common-mode and differential-mode interference signals.

The filter works by utilizing capacitors to screen out high-frequency electric and magnetic fields and passing only desired signals. By virtue of its RC network structure, the 1270-016 filter offers better performance than the basic LC filter in terms of noise rejection. Specifically, the filter utilizes capacitors to provide efficient high-frequency mutual coupling between input and output lines, allowing it to offer low differential or common-mode impedance and ultimately reject current noise from reaching the system.

Conclusion

EMI/RFI filters are used to protect communications systems from various sources of EMI or RFI. RC Network-based filters, such as the 1270-016, are suitable for high-speed data transmission applications, offering superior common-mode and differential-mode signal rejection performance. The filter utilizes capacitors to provide high-frequency mutual coupling between input and output lines in order to suppress unwanted current noise. With their advanced features, these filters can be counted on to guarantee signal integrity in all data transmission systems.

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