LFCN-4400+

Overview

The LFCN-4400+ is a low-pass ceramic filter manufactured by Mini-Circuits, designed for RF applications up to 4400 MHz. It features a cutoff frequency of 5290 MHz and operates at a nominal impedance of 50 ohms. The component utilizes LTCC technology and is housed in a compact 4-SMD, No Lead package with dimensions of 3.2x1.6mm. It supports an average input power of 8 W and exhibits a maximum insertion loss of 3 dB.

Feature Summary

• Low-pass filtering capability utilizing LTCC ceramic technology
• Compact surface-mount design suitable for space-constrained PCB layouts
• High power handling capacity for robust signal integrity

Applications

• RF front-end filtering in communication systems
• Harmonic suppression in transmitter stages
• Signal conditioning in microwave circuits

Procurement Notes

Verify the specific suffix requirements before ordering. The standard LFCN-4400+ provides DC isolation to ground; if DC pass-through is required, the LFCN-4400D+ variant must be selected. Confirm package orientation and pinout compatibility with your PCB footprint during the procurement phase to ensure correct installation.

Selection Notes

Select this component when a sharp cutoff near 4.4 GHz is needed with minimal insertion loss. Consider the LFCN-4400D+ if DC continuity between input and output is necessary. Ensure the system impedance matches the 50-ohm specification. Evaluate thermal management capabilities given the 8 W average input power rating for high-power environments.

Part Context

This part belongs to Mini-Circuits' LFCN series of LTCC low-pass filters. These components are engineered for high performance in RF and microwave frequencies. The series offers various cutoff frequencies and power ratings, providing designers with flexible options for filtering applications across different bandwidths and power levels.

Replacement Considerations

The LFCN-4400D+ serves as a functional substitute where DC pass-through is required instead of DC isolation. Verify that any alternative component maintains the 50-ohm impedance and similar cutoff characteristics to ensure circuit compatibility without redesign.