SF2194E

Overview

The RFMi SF2194E is a Surface Acoustic Wave (SAW) bandpass filter designed for signal conditioning in RF front-end circuits. It operates at a center frequency of 1.22 GHz with a narrow bandwidth ranging from 0.5 MHz to 0.75 MHz, specifically covering the range of 1.21972 GHz to 1.22042 GHz. The component features a 50 Ohm impedance and a maximum insertion loss of 7 dB. It is rated for a voltage of 3 V and utilizes an 8-pin SMD/SMT package, identified as SM-3030-6 or similar surface mount configuration. The device supports board mounting and is suitable for applications requiring precise frequency selection.

Feature Summary

• Surface Acoustic Wave technology for high-performance signal filtering
• Narrow bandwidth design for precise frequency selection around 1.22 GHz
• Low insertion loss characteristics for efficient signal transmission
• Compact surface-mount packaging for automated assembly integration

Applications

• RF front-end circuits requiring specific 1.22 GHz channel filtering
• Wireless communication systems utilizing narrowband SAW filters
• Signal conditioning modules in radio frequency equipment

Procurement Notes

Verify the exact bandwidth specification, as sources indicate variations between 0.5 MHz and 0.75 MHz for this part number. Confirm the physical package dimensions against the SM-3030-6 designation to ensure compatibility with existing PCB footprints. Check RoHS compliance status directly with the manufacturer documentation before finalizing procurement decisions.

Selection Notes

Select this component when a narrow bandpass filter centered at 1.22 GHz is required. Ensure the system impedance matches the 50 Ohm rating of the filter. Consider the 7 dB insertion loss impact on overall link budget. Verify that the operating voltage does not exceed the 3 V rating. Compare alternative SAW filters if wider bandwidths are acceptable for the application.

Part Context

The SF2194E belongs to the RFMi SAW filter series, which provides general-purpose RF filtering solutions. These components are engineered for reliability in consumer and industrial electronics. The series typically offers various center frequencies and bandwidth options to suit different wireless standards. This specific model targets the 1.22 GHz region, distinct from other models like the SF2197E or SF2199E which operate at lower frequencies.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Engineers should consult official RFMi documentation or authorized distributors for validated cross-reference lists. Direct replacements must match the 1.22 GHz center frequency, 50 Ohm impedance, and compatible package type.