XLF-13H+

Overview

The XLF-13H+ is a three-section reflectionless low-pass filter designed for RF applications. It operates from DC to 1000 MHz with a 50Ω impedance. The component features a 3 dB cutoff frequency of 1.15 GHz and provides stopband performance from 1.85 to 19 GHz. Packaged in the DG1847 24VFQFN surface-mount format, it utilizes a novel topology that absorbs and terminates stop-band energy rather than reflecting it.

Feature Summary

• Employs a three-section reflectionless topology that absorbs stop-band energy
• Terminates out-of-band signals internally to prevent signal reflections
• Provides stable impedance matching across the operational bandwidth

Applications

• RF front-end filtering in communication systems
• Harmonic suppression in transmitter chains
• Interference mitigation in sensitive receiver inputs

Procurement Notes

Verify the specific datasheet revision and ordering suffix when sourcing. Confirm the package type matches the design footprint requirements. Ensure the supplier provides official Mini-Circuits documentation to validate the reflectionless characteristics and electrical specifications for the intended frequency range.

Selection Notes

Select this component when preventing reflected signals is critical for system stability. The absorption-based design differs from traditional reflective filters. Verify that the 1.15 GHz cutoff meets the passband requirements and that the 19 GHz stopband covers the necessary interference frequencies for the application.

Part Context

This part belongs to Mini-Circuits' XLF series of reflectionless filters. These components are engineered to eliminate the VSWR issues associated with standard reactive filters. The series offers various cutoff frequencies while maintaining consistent 50Ω performance and internal termination capabilities for improved signal integrity.

Replacement Considerations

Direct substitutes within the same reflectionless family include models such as TB-952-13H+. Verify pinout compatibility and electrical parameters before substitution. Standard reflective low-pass filters are not equivalent replacements due to differing reflection behaviors.