LFCN-3400D-1+

Overview

The LFCN-3400D-1+ is a miniature low-pass filter manufactured by Mini-Circuits using low-temperature co-fired ceramic (LTCC) technology. It provides a DC to 3400 MHz passband with a 3.95 GHz cutoff frequency. The component operates at a nominal impedance of 50 Ohms and features an insertion loss of 1.5 dB. It is housed in a compact 4-SMD, no-lead package with dimensions of 3.20 mm x 1.60 mm x 0.94 mm.

Feature Summary

• Utilizes LTCC construction for high reliability and thermal stability
• Designed for surface-mount integration into RF circuits
• Provides effective attenuation above the 3.95 GHz cutoff frequency

Applications

• RF front-end filtering in wireless communication systems
• Harmonic suppression in signal generation circuits
• Interference mitigation in microwave receiver stages

Procurement Notes

Verify the specific suffix designation when ordering, as the D-1 variant may differ from standard D versions. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer. Ensure compatibility with standard SMD reflow profiles during assembly planning.

Selection Notes

Select this component for applications requiring a sharp cutoff near 4 GHz with minimal footprint. Evaluate insertion loss requirements against system noise budget. Consider the 50 Ohm impedance match for seamless integration into standard transmission lines without additional matching networks.

Part Context

This part belongs to the LFCN series of LTCC low-pass filters from Mini-Circuits. The series offers various cutoff frequencies tailored for different RF bands. The LFCN-3400D-1+ specifically targets applications needing filtering up to approximately 3.4 GHz with a defined stopband starting at 3.95 GHz.

Replacement Considerations

Check Mini-Circuits documentation for direct substitutes within the LFCN family. Verify electrical equivalence for cutoff frequency and impedance. Ensure physical footprint compatibility if replacing on existing PCB layouts.