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Product Detailed Parameters
- Description：LTCC LOW PASS FILTER, DC - 400 M
- Series：LFCN
- Mfr：Mini-Circuits
- Package：Tape & Reel (TR),Cut Tape (CT)
- Frequency：560MHz
- Impedance：50Ohm
- Bandwidth：-
- Insertion Loss：1dB
- Filter Type：Low Pass
- Mounting Type：Surface Mount
- Package / Case：4-SMD, No Lead
- Size / Dimension：0.126" L x 0.063" W (3.20mm x 1.60mm)
- Height (Max)：0.037" (0.94mm)
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Overview
The LFCN-400+ is an LTCC low-pass filter from Mini-Circuits, operating from DC to 400 MHz with a 50 Ohm impedance. It utilizes FV1206 surface-mount packaging and supports reel tape-and-reel delivery. The component is rated for operation between -40°C and +85°C. Key electrical specifications include a maximum insertion loss of 1 dB. This device is designed for board mounting in RF signal paths requiring frequency discrimination.
Feature Summary
- Utilizes LTCC technology for compact surface-mount integration
- Provides low-pass filtering characteristics up to 400 MHz
- Maintains 50 Ohm system impedance compatibility
Applications
- RF front-end filtering in communication systems
- Signal conditioning where DC blocking is acceptable
- Harmonic suppression in microwave circuits
Procurement Notes
Verify the specific suffix requirements against application needs. The standard LFCN-400+ lacks DC pass capability; use the D-suffix variant if DC continuity is required. Confirm package dimensions match the PCB layout. Ensure environmental ratings meet operational temperature ranges. Cross-reference datasheet graphs for precise attenuation performance at target frequencies.
Selection Notes
Select this model when a sharp cutoff near 400 MHz is needed in a small footprint. Consider the LFCG-400+ for similar frequency ranges but different package styles. Evaluate the LFCN-400D+ if DC voltage presence at ports necessitates isolation rather than coupling capacitors. Assess insertion loss limits against system sensitivity requirements before finalizing the design.
Part Context
This component belongs to the LFCN series of ceramic filters by Mini-Circuits. These components are engineered for high-performance RF applications across various industries. The series offers consistent impedance matching and reliable thermal stability. The LFCN-400+ specifically addresses needs for compact, high-isolation low-pass filtering solutions in modern electronic designs.
Replacement Considerations
Public confirmed substitute part numbers: LFCN-400D+
FAQ
Does the LFCN-400+ support DC pass-through?
No, the standard LFCN-400+ does not support DC pass-through. Coupling capacitors are required if DC voltage is present at the input or output ports.
What is the recommended alternative for DC pass applications?
The LFCN-400D+ variant provides DC pass-through capability with greater than 100 MOhm isolation to ground.
