XLF-123+

Overview

The XLF-123+ is a reflectionless low-pass filter from Mini-Circuits, designed for RF applications up to 15 GHz. It utilizes a novel topology that absorbs and terminates stop-band signals, preventing signal reflections. The component operates within a 50 Ohm impedance system and features a 12-VQFN package with an exposed pad. It supports surface mount technology (SMD/SMT) and functions reliably across a temperature range of -55°C to +105°C.

Feature Summary

• Employs reflectionless topology to absorb and terminate stop-band signals
• Provides low-pass filtering capability up to 15 GHz cutoff frequency
• Designed for 50 Ohm impedance systems
• Utilizes compact 12-VQFN surface mount package

Applications

• RF signal conditioning in communication systems
• Harmonic suppression in microwave circuits
• Signal integrity improvement in high-frequency designs

Procurement Notes

Verify the exact part number suffix against official Mini-Circuits documentation to ensure correct specifications. Confirm package type and termination style match your PCB design requirements. Check operating temperature ranges for your specific application environment. Ensure compatibility with 50 Ohm system impedance. Validate lead times and availability through authorized distributors.

Selection Notes

Select this component when reflectionless performance is critical for system stability. Consider the 15 GHz cutoff frequency relative to your signal bandwidth. Evaluate the 12-VQFN package size against available board space. Assess thermal management needs given the exposed pad design. Verify that the -55°C to +105°C operating range meets environmental constraints.

Part Context

The XLF series represents Mini-Circuits' line of reflectionless filters, which differ from traditional absorptive or reflective designs by terminating out-of-band energy internally. This approach minimizes standing waves and improves system performance in multi-stage RF chains. The XLF-123+ specifically targets high-frequency applications requiring precise low-pass characteristics without reflection-induced distortions.

Replacement Considerations

The XLF-123-D+ is a die version of this component. Verify if bare die form factor suits your assembly process. No other direct substitutes are confirmed in public documentation.