XLF-133+

Overview

The XLF-133+ is a reflectionless low-pass filter manufactured by Mini-Circuits, designed for RF signal conditioning applications. It operates from DC to 13,100 MHz with a cutoff frequency of 15.8 GHz and maintains a system impedance of 50Ω. The component utilizes a novel topology that absorbs stop-band signals rather than reflecting them, which prevents standing waves and improves system stability. Key electrical specifications include an insertion loss of 2.4 dB. It is housed in a compact 12-VQFN exposed pad package suitable for surface mount technology.

Feature Summary

• Employs reflectionless topology to absorb stop-band energy
• Provides stable operation by eliminating reflected signals
• Designed for high-performance RF signal conditioning

Applications

• RF front-end modules requiring stable impedance matching
• Upconverter and downconverter assemblies
• Test and measurement equipment filters

Procurement Notes

Verify the specific suffix designation when ordering, as variations such as DG+ may exist within the product family. Confirm the package type matches the design requirements, typically 12-VQFN. Ensure the datasheet version aligns with the latest Mini-Circuits specifications for accurate performance parameters. Cross-reference part numbers with official manufacturer documentation to avoid confusion between similar models.

Selection Notes

Select this component when system stability is critical due to reactive loads or mismatched impedances downstream. The reflectionless characteristic makes it superior to traditional absorptive or reflective filters in complex multi-stage designs. Consider the 12-VQFN package size for space-constrained PCB layouts. Evaluate the 2.4 dB insertion loss against system gain budgets to ensure signal integrity is maintained across the passband.

Part Context

This component belongs to Mini-Circuits' XLF series of reflectionless filters, which are engineered to address common issues in RF systems caused by signal reflections. Unlike standard filters that reflect out-of-band energy, these devices terminate unwanted frequencies internally. This series supports various frequency ranges and topologies, providing designers with versatile solutions for modern wireless communication infrastructure and microwave applications.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult Mini-Circuits for direct equivalents or alternative reflectionless filter models with compatible cutoff frequencies and package dimensions.