XLF-222H+

Overview

The XLF-222H+ is a reflectionless low-pass RF filter manufactured by Mini-Circuits, designed for signal conditioning applications. It operates with a passband from DC to 2200 MHz and features a cutoff frequency of 2.4 GHz. The device provides a bandwidth of 2.2 GHz and exhibits an insertion loss of 2.9 dB within the passband. It maintains a 50-ohm impedance system and includes stopband coverage across multiple ranges: 4 to 6 GHz, 6 to 10 GHz, and 10 to 20 GHz. The component utilizes a novel topology that absorbs and terminates stopband signals internally, preventing reflections. It is housed in a compact 24-VFQFN package with an exposed pad.

Feature Summary

• Employs a reflectionless topology that internally absorbs and terminates stopband signals to prevent signal reflections.

Applications

• S-band upconverter assembly design
• Wide temperature range signal conditioning

Procurement Notes

Verify the specific datasheet version when sourcing, as Mini-Circuits may update documentation over time. Confirm the package type matches the 24-VFQFN specification with an exposed pad for proper thermal management and mounting. Ensure the application environment aligns with the component's robustness and temperature stability characteristics. Cross-reference the part number suffix to confirm it denotes the standard surface-mount variant without additional connectors unless specified.

Selection Notes

Select this component when reflectionless performance is critical to maintain signal integrity in sensitive RF paths. The internal termination of out-of-band energy makes it suitable for systems where reflected power could damage upstream components or cause instability. Consider the 2.2 GHz bandwidth and 2.9 dB insertion loss against system requirements. The wide stopband coverage ensures effective filtering across multiple harmonic ranges without requiring additional external termination networks.

Part Context

This component belongs to Mini-Circuits' XLF series of reflectionless filters, which utilize proprietary technology to absorb stopband energy rather than reflecting it. This series is distinct from traditional absorptive or reflective filters by integrating the termination load directly into the filter structure. The XLF-222H+ specifically targets low-frequency RF applications requiring high isolation and minimal VSWR degradation due to source/load mismatches.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Direct replacement requires matching the reflectionless topology, 2.2 GHz bandwidth, and 24-VFQFN package dimensions. Verify if alternative components offer similar internal termination capabilities to avoid redesigning the PCB layout for external terminations.

FAQ

How does the XLF-222H+ handle stopband signals compared to standard low-pass filters?

Unlike standard filters that reflect stopband signals, the XLF-222H+ uses a reflectionless topology to absorb and terminate these signals internally, eliminating reflections.

What is the operating frequency range of this filter?

The filter operates from DC to 2200 MHz in the passband, with a cutoff frequency at 2.4 GHz.