The ACF451832-472-T is a common mode filter manufactured by TDK Corporation. It is designed to suppress common mode noise in high-speed differential transmission lines. Common mode noise is unwanted electrical noise that appears equally on both lines of a differential pair, and this filter is specifically engineered to attenuate this type of interference without significantly affecting the desired differential signal.

Applications:

• USB 2.0 and 3.0 data lines in computers and peripherals
• HDMI interfaces in televisions, monitors, and media players
• LVDS (Low-Voltage Differential Signaling) in LCD displays
• DisplayPort connections in computing devices
• Ethernet connections in network devices

Features:

• Compact size (4.5 x 1.8 x 3.2 mm) suitable for dense PCB layouts
• High common mode impedance for effective noise suppression
• Low differential mode impedance to minimize signal degradation
• Surface Mount Technology (SMT) for automated assembly
• Excellent solderability and temperature resistance
• RoHS compliant

Benefits:

• Reduces electromagnetic interference (EMI) improving signal integrity
• Enhances the reliability and performance of high-speed data transmission
• Minimizes signal distortion and loss
• Saves board space due to its small footprint
• Simplifies assembly and reduces manufacturing costs
• Complies with environmental regulations

Additional Details:

The ACF451832-472-T filter achieves its noise suppression capabilities through the use of a ferrite core and a specific winding configuration. The ferrite core provides high impedance to common mode currents, effectively blocking the noise. The winding configuration is designed to minimize the impact on the differential signal, ensuring that the desired signal passes through with minimal attenuation. The '472' designation indicates a specific impedance value at a given frequency, typically around 4700 ohms at 100 MHz, optimized for the intended applications.

Technical Specifications:

• Impedance @ 100 MHz: Approximately 4700 ohms
• Rated Current: 500 mA (typical)
• DC Resistance: < 1 ohm (typical)
• Operating Temperature Range: -40°C to +85°C
• Package: 1812 (EIA) / 4532 (Metric)

This common mode filter from TDK is a robust and reliable solution for ensuring signal integrity in high-speed data transmission applications. Its compact size, high performance, and ease of assembly make it a popular choice for engineers designing modern electronic devices.