An electromagnetic interference (EMI) filter is used in electronic circuits to improve system immunity against unwanted external electromagnetic signals from neighboring circuits and to avoid emitting radiation (“noise”) that may disturb the same nearby circuits by canceling unwanted frequencies.
EMI noise can adversely affect useful data line signals, possibly altering their functionality, either by coupling (capacitive or magnetic), conduction (common or differential mode), or electromagnetic field coupling (antenna effect).
ST’s EMI filters help electronic designers reduce their design time and achieve required performance levels.
Main applications for EMI filters and ASIP technology
For EMI filters:
For ASIP technology:
HDMI 2.0,
HDMI 2.1,
MIPI DSI,
CSI communications
USB 4.0
EMI filter and ASIP product types
Our EMI filter and ASIP portfolio includes 4 main types of solutions designed to reduce high-frequency electromagnetic noise present on power and signal lines. These flexible and highly integrated solutions help electronic engineers meet their main design challenges, while reducing development time and costs.
Benefits of ST’s EMI filters and ASIP technology
ST’s EMI filters and ECMF provide a monolithic integration of the required ESD protection at system-level (according to standard IEC 61000-4-2 level 4 +8kV contact) along with a filter that reduces EMI noise on digital or analog communication lines for space-saving purposes.
Main benefits:
- Requires less PCB space compared to equivalent discrete solutions
- Increases application robustness against electrostatic discharges and EMI / common-mode noise.
- Offers a wider frequency range rejection thanks to a lower parasitic inductance compared with discrete solutions.
- Improved design flexibility as the filter’s resonant frequency is not modified when designers need to slightly change the PCB layout (unlike with discrete solutions).
- EMI filters are available in first order (R-C) or second order (L-C)
Featured Videos
In this video, we explain why it is important to protect against electrostatic discharges. We give a quick demonstration to show exactly what happens when you shoot at a microcontroller with an ESD gun!
During this one-hour webinar, you will learn how to make your electronic system more robust against destructive Electrostatic Discharges (ESD) by using ST ESD Protection components. Agenda : 1) ESD major root causes and EMC standards, 2) ST ESD Protections which can help to protect your application againts ESD, 3) Many real application examples demonstrating where protections play an important role, 4) How to select the best protection for your usecases
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