SF2190B

Overview

The SF2190B is a general-purpose RF Surface Acoustic Wave (SAW) bandpass filter manufactured by RFMi, an Akoustis brand. Designed for signal conditioning in wireless applications, this component operates at a center frequency of 138 MHz with a bandwidth of 63 MHz. It features a typical insertion loss of 18.8 dB and a maximum of 21.0 dB. The device is rated for 3 V operation and maintains a 50 Ohm impedance. It is housed in a compact 10-SMD surface-mount package, suitable for integration into various digital and wireless communication systems requiring precise frequency selection.

Feature Summary

• Utilizes Surface Acoustic Wave (SAW) technology for effective RF signal filtering
• Provides bandpass filtering characteristics centered at 138 MHz
• Designed for general-purpose signal conditioning in wireless environments

Applications

• Digital wireless communication systems
• RF signal conditioning circuits
• Frequency selection in 138 MHz operational bands

Procurement Notes

Verify the specific ordering suffix to ensure the correct tape-and-reel or tray configuration matches your assembly requirements. Confirm RoHS compliance status and lead-free material declarations prior to procurement. Ensure the 10-SMD package footprint aligns with your PCB design constraints. Cross-reference the manufacturer part number with distributor catalogs to validate current availability and technical documentation accuracy.

Selection Notes

Select the SF2190B when a SAW-based solution is required for 138 MHz bandpass filtering with moderate insertion loss tolerance. Consider the 63 MHz bandwidth relative to your channel spacing needs. Evaluate the 10-SMD package size against available board real estate. Compare the 18.8 dB typical insertion loss against system link budget requirements to ensure adequate signal integrity without excessive amplification stages.

Part Context

RFMi, now operating under the Akoustis brand, specializes in RF components utilizing SAW, crystal, and ceramic technologies. The SF2190B belongs to their lineup of surface acoustic wave filters designed for digital and wireless applications. This product line focuses on providing reliable signal conditioning solutions for various frequency ranges, supporting the development of compact and efficient radio frequency front-end modules.

Replacement Considerations

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