SF2485E

Overview

The RFMi SF2485E is a Surface Acoustic Wave (SAW) filter designed for signal conditioning applications. It operates at a center frequency of 868 MHz with a bandwidth ranging from 2 MHz to 4 MHz, covering the 867 MHz to 869 MHz range. The component features an insertion loss of 24 dB and is rated for 3 V. It utilizes SMD/SMT termination types within an SM-3030-8 package. The device supports board mounting and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Surface Acoustic Wave technology for precise RF signal filtering
• Matched impedance design optimized for 3 V operation
• Compact surface-mount packaging for automated assembly

Applications

• ISM band communication systems
• RF front-end signal conditioning
• Wireless sensor networks

Procurement Notes

Verify the specific datasheet revision to confirm exact bandwidth specifications, as sources indicate variations between 2 MHz and 4 MHz. Ensure the SM-3030-8 package footprint matches the target PCB layout. Confirm RoHS compliance status through official manufacturer documentation prior to integration.

Selection Notes

Select this component for applications requiring narrowband filtering in the 868 MHz ISM band. Consider the 24 dB insertion loss when designing gain stages. Verify thermal requirements against the -40°C to +85°C operating range. Compare against SF2472E if different frequency coverage is needed.

Part Context

This part belongs to the RFMi SF series of SAW filters. These components are engineered for general-purpose RF applications requiring stable frequency response. The series typically offers high Q-factor performance suitable for industrial, scientific, and medical radio bands.

Replacement Considerations

SF2472E shares similar packaging but operates at 869 MHz with a 2 MHz bandwidth. Verify frequency alignment before substitution.