SF2229A

Overview

The RFMi SF2229A is a Surface Acoustic Wave (SAW) bandpass filter designed for signal conditioning applications. It operates with a center frequency of 70 MHz, covering a range from 69.9 MHz to 70.1 MHz. The component features a bandwidth of 0.92 MHz and an insertion loss of 10.5 dB. It is rated for a maximum voltage of 10 V and maintains a system impedance of 50 ohms. The device utilizes an SMD/SMT termination type within the SM-13365-12 package. It functions reliably across a temperature range of -55 °C to +95 °C.

Feature Summary

• Surface Acoustic Wave technology for precise signal filtering
• High selectivity with narrow bandwidth design
• Electrostatic protection via Faraday cage-based package structure

Applications

• Intermediate Frequency (IF) stages in radio receivers
• Signal conditioning in wireless communication systems
• OEM devices requiring internet connectivity and control

Procurement Notes

Verify the specific datasheet version and RoHS compliance status directly with RFMi or authorized distributors before integration. Confirm that the SM-13365-12 package dimensions match your PCB footprint requirements. Ensure operating conditions remain within the specified -55 °C to +95 °C range and do not exceed the 10 V rating to maintain performance integrity.

Selection Notes

Select this component when a 70 MHz center frequency with approximately 1 MHz bandwidth is required for IF filtering. The 50-ohm impedance matches standard RF transmission lines. Consider the 10.5 dB insertion loss impact on system gain. The wide operating temperature range supports industrial or automotive environments where thermal stability is critical for consistent signal processing.

Part Context

The SF2229A belongs to the RFMi SF series of SAW filters. These components are engineered for signal conditioning in modern electronic devices. RFMi products enable OEMs to integrate wireless functionality, allowing end-users to connect, communicate, and monitor equipment remotely. This series emphasizes reliability in high-frequency signal processing tasks.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs if considering alternative SAW filters from other manufacturers.