LAT-4+

Overview

The LAT-4+ is a surface-mount fixed attenuator manufactured by Mini-Circuits, designed for RF and microwave applications. It provides a nominal attenuation of 4 dB across a frequency range from DC to 2500 MHz. The component operates with a 50-ohm impedance and features a TO-253-4 package. It supports a maximum power handling of 500 mW at ambient temperature, derating linearly to 0.2 W at +85°C. The device maintains a typical VSWR of 1.5:1 and functions within an operating temperature range of -55°C to +85°C.

Feature Summary

• Fixed 4 dB attenuation value suitable for signal level control in RF circuits
• Surface-mount construction utilizing the TO-253-4 package for compact integration
• Wideband operation covering DC to 2500 MHz with stable 50-ohm impedance
• Robust thermal performance with defined power derating characteristics up to +85°C

Applications

• RF signal path attenuation in communication systems
• Impedance matching networks in microwave test equipment
• Signal conditioning in radar and electronic warfare systems
• Component integration in mobile and base station hardware

Procurement Notes

Verify the exact datasheet version from Mini-Circuits to confirm current manufacturing status and compliance details. Ensure that the TO-253-4 package dimensions align with the target PCB footprint. Confirm thermal management requirements, as power handling decreases significantly at elevated temperatures. Check for RoHS compliance markers on official documentation. Validate that the 50-ohm system impedance matches the surrounding circuit design to prevent reflection issues.

Selection Notes

Select the LAT-4+ when a precise 4 dB reduction is required within the 2.5 GHz bandwidth. Consider the TO-253-4 form factor for space-constrained surface-mount designs. Evaluate thermal constraints if the operating environment exceeds standard ambient conditions, noting the linear derate curve. Compare against other LAT series values if different attenuation levels are needed. Ensure the application does not require adjustable attenuation, as this is a fixed component.

Part Context

The LAT-4+ belongs to Mini-Circuits' LAT series of miniature surface-mount fixed attenuators. This family offers various attenuation values while maintaining consistent electrical performance and mechanical footprints. The series is engineered for high reliability in demanding RF environments. Components in this line typically share similar impedance characteristics and frequency ranges, facilitating standardized design approaches across different signal processing stages.

Replacement Considerations

Direct substitutes include other Mini-Circuits LAT series components with identical attenuation values, such as the LAT-4 (non-plus variant) if lead-free compliance is not strictly required. Cross-manufacturer equivalents must match the 4 dB attenuation, 50-ohm impedance, and TO-253-4 package dimensions. Verify that alternative parts meet the same DC to 2500 MHz frequency range and power handling specifications.