The CSPEMI400 is a Common Mode EMI Filter designed by California Micro Devices Corp. This filter is intended to suppress common-mode noise on high-speed data lines while minimizing signal degradation. It is particularly useful in applications where electromagnetic interference (EMI) needs to be reduced to meet regulatory requirements or improve system performance.

Applications:

• USB Ports: Filtering common-mode noise on USB data lines.
• HDMI Interfaces: Suppression of EMI on HDMI connections.
• DisplayPort Interfaces: Used in DisplayPort applications to reduce EMI emissions.
• Ethernet Ports: Reducing noise on Ethernet data lines to improve signal integrity.
• Mobile Devices: Filtering noise in smartphones, tablets, and other portable devices.

Features:

• Common Mode Attenuation: Provides significant attenuation of common-mode noise.
• Low Differential Mode Insertion Loss: Minimizes signal degradation on differential data lines.
• Small Footprint: Compact package for space-constrained applications.
• High ESD Protection: Offers protection against electrostatic discharge (ESD) events.
• RoHS Compliant: Complies with Restriction of Hazardous Substances directive.

Benefits:

• Reduced EMI Emissions: Helps to meet regulatory requirements for EMI emissions.
• Improved Signal Integrity: Minimizes signal degradation for reliable data transmission.
• Enhanced System Performance: Reduces noise for improved system stability.
• Space Saving: Compact package allows for use in small devices.
• ESD Protection: Protects sensitive components from damage due to ESD.

Additional Details:

The CSPEMI400 has a typical common-mode attenuation of -20dB or more at critical frequencies. It is available in a small chip-scale package (CSP). It is commonly used in consumer electronics, computer peripherals, and communication equipment. The low differential mode insertion loss ensures that the signal integrity is maintained, allowing for high-speed data transmission. The integrated ESD protection diodes provide additional protection against electrostatic discharge events, increasing the reliability of the device. The CSPEMI400 is designed to be easily integrated into existing circuit designs, making it a versatile solution for EMI filtering. Specific impedance and attenuation characteristics can be found in the product datasheet to optimize performance in different applications.