VLFX-950+

Overview

The VLFX-950+ is an LTCC low-pass filter designed for RF applications with a cutoff frequency of 950 MHz. It operates within a DC to 1400 MHz passband and maintains a 50 Ohm impedance. The component features SMA connectors for inline integration. Electrical specifications include a maximum insertion loss of 1.4 dB in the passband, rising to 21 dB at 1750 MHz and exceeding 10 dB up to 20 GHz. The device ensures signal integrity by attenuating frequencies above the designated cutoff while preserving lower frequency signals.

Feature Summary

• Utilizes LTCC technology for compact form factor and thermal stability
• Provides high isolation performance extending up to 20 GHz
• Features SMA connectors for reliable inline circuit integration

Applications

• RF front-end filtering in communication systems
• Signal conditioning in test and measurement equipment
• Harmonic suppression in microwave circuits

Procurement Notes

Verify the specific datasheet version for precise electrical tolerances and mechanical dimensions before integration. Confirm connector orientation and pinout requirements against your PCB layout. Ensure environmental conditions match the component's operational ratings. Cross-reference part numbers to distinguish between standard and miniaturized variants if space constraints exist.

Selection Notes

Select this component when a sharp cutoff near 950 MHz is required with minimal insertion loss in the passband. Consider the physical size and SMA termination compatibility with existing infrastructure. Evaluate stop-band attenuation requirements against the specified isolation levels up to 20 GHz. Ensure the 50 Ohm system impedance matches the rest of the RF chain to prevent signal reflection.

Part Context

This component belongs to Mini-Circuits' VLFX series of low-pass filters. The series offers various cutoff frequencies tailored for different RF bands. These filters are engineered for consistent performance across wide temperature ranges. The LTCC construction allows for robustness in demanding electronic environments.

Replacement Considerations

Check Mini-Circuits documentation for direct substitutes like the MINI-VLFX-950 for space-constrained designs. Verify that alternative parts maintain identical SMA connectivity and 50 Ohm impedance. Ensure replacement components meet or exceed the original stop-band attenuation specifications.