LFCN-1400D+

Overview

The LFCN-1400D+ is a low-pass filter with a cutoff frequency of 1400 MHz and a passband extending to DC. It features a 50 Ohm impedance rating and utilizes an LTCC construction housed in a 1206 surface-mount package. The component provides high stopband rejection and includes a 'D' suffix variant that supports DC continuity between input and output, offering greater than 100 MOhm isolation to ground.

Feature Summary

• LTCC ceramic construction for compact SMD integration
• DC-to-1400 MHz passband with 50 Ohm impedance
• High stopband rejection characteristics
• DC continuity capability with high ground isolation

Applications

• RF signal conditioning circuits
• Harmonic suppression in transmission lines
• Base station front-end filtering
• Test and measurement equipment

Procurement Notes

Verify the specific datasheet revision for the LFCN-1400D+ to confirm electrical tolerances and thermal specifications. Ensure the design accommodates the 1206 footprint dimensions. Confirm that the DC continuity feature aligns with system grounding requirements, as this distinguishes it from standard AC-coupled variants.

Selection Notes

Select this component when a sharp cutoff near 1.4 GHz is required alongside DC signal passage. The 1206 package suits space-constrained PCB layouts. Consider the high ground isolation provided by the D-suffix if DC biasing or grounding schemes necessitate minimal leakage to chassis.

Part Context

This part belongs to Mini-Circuits' LFCN series of LTCC low-pass filters. These components are designed for RF and microwave applications up to 86 GHz. The series offers various cutoff frequencies and package styles, providing standardized solutions for filtering needs across communication systems.

Replacement Considerations

Consult official substitution lists for equivalent LTCC low-pass filters with similar cutoff frequencies and 1206 footprints. Verify impedance matching and physical dimensions before replacing.