XLF-112H+

Overview

The XLF-112H+ is a three-section reflectionless low-pass filter manufactured by Mini-Circuits. It features a 3 dB cutoff frequency of 1.2 GHz and operates within a 50Ω system. The device provides a passband from DC to 1.05 GHz and an effective stopband ranging from 2 GHz to 19 GHz. It is housed in a compact 24-VFQFN exposed pad package, designed for high-performance RF applications requiring superior out-of-band rejection.

Feature Summary

• Employs a novel three-section reflectionless topology that absorbs and terminates stopband energy rather than reflecting it.

Applications

• RF signal chain filtering
• Harmonic suppression
• Interference mitigation

Procurement Notes

Verify the specific datasheet version and ordering suffixes directly with Mini-Circuits or authorized distributors. Confirm that the 24-VFQFN package dimensions and pinout match your PCB layout requirements. Ensure thermal management considerations are addressed due to the exposed pad design. Cross-reference specifications against current product releases to avoid obsolete variants.

Selection Notes

Select this component when minimizing reflected power in the stopband is critical for system stability. The reflectionless design prevents standing waves that can degrade amplifier performance. Verify that the 1.2 GHz cutoff meets the specific bandwidth needs of the application. Consider the 24-VFQFN footprint during the initial schematic capture phase to ensure compatibility.

Part Context

This part belongs to the XLF series of reflectionless filters from Mini-Circuits. These components utilize proprietary technology to absorb unwanted frequencies. The series covers various cutoff frequencies and packages. The XLF-112H+ specifically targets applications requiring sharp roll-off characteristics near 1.2 GHz while maintaining a small form factor.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Direct replacement requires matching the reflectionless topology and 24-VFQFN package constraints.

FAQ

How does the reflectionless topology benefit the circuit?

It absorbs stopband energy instead of reflecting it, preventing standing waves and improving system stability.

What is the operating impedance of the XLF-112H+?

The filter is designed for a 50Ω system.