LFCN-3800+

Overview

The LFCN-3800+ is a ceramic low-pass filter manufactured by Mini-Circuits, designed for RF applications ranging from DC to 3900 MHz. It features a 50 Ohm impedance and utilizes an LTCC construction housed in a compact 1206 (3216 metric) surface-mount package with four SMD no-lead terminations. The component provides high power handling capabilities and is optimized for performance up to 4.85 GHz. This model supports direct DC pass-through between input and output ports without requiring external coupling capacitors.

Feature Summary

• LTCC ceramic construction for robust thermal stability
• Surface-mount design compatible with automated assembly
• High power handling capability for demanding RF environments

Applications

• RF signal filtering in wireless communication systems
• Harmonic suppression in microwave circuits
• Signal conditioning in test and measurement equipment

Procurement Notes

Verify the specific suffix designation when ordering, as the standard LFCN-3800+ supports DC pass-through, whereas variants with a 'D' suffix may offer different isolation characteristics. Confirm that the required impedance matches the system's 50 Ohm standard. Ensure the PCB footprint aligns with the 1206 package dimensions to guarantee proper soldering and electrical connection during assembly.

Selection Notes

Select this component when a low-pass filter is required for frequencies up to 3900 MHz with a need for DC continuity. Consider the LFCN-3800+ for space-constrained designs due to its small form factor. Evaluate the trade-off between insertion loss and stopband rejection against other Mini-Circuits models if stricter attenuation specifications are necessary beyond the standard performance profile.

Part Context

This part belongs to Mini-Circuits' LFCN series of ceramic filters, which are engineered for high reliability in RF and IF applications. The series utilizes Low Temperature Co-fired Ceramic technology to achieve consistent performance across varying environmental conditions. These components are widely used in modern electronic devices where size reduction and signal integrity are critical priorities.

Replacement Considerations

For applications requiring DC isolation to ground instead of DC pass-through, consider the variant with the 'D' suffix, such as LFCN-3800-D+, which provides greater than 100 MOhm isolation to ground. Verify compatibility before substitution.