SF2137D

Overview

The SF2137D is a Surface Acoustic Wave (SAW) filter manufactured by RFMi, an Akoustis brand. It operates at a center frequency of 869 MHz with a bandwidth of 2 MHz, covering the range from 868 MHz to 870 MHz. The component features a maximum voltage rating of 3 V and a nominal impedance of 50 Ohms. It utilizes SMD/SMT termination style within an SM3838-6 package. Key electrical characteristics include an amplitude ripple of 0.2 dB to 1.5 dB p-p within the passband and attenuation levels of 40 dB to 47 dB in the stopband regions of 825–828 MHz and 835–842 MHz.

Feature Summary

• Surface Acoustic Wave technology for general purpose RF signal conditioning
• Designed for operation within the 868 MHz to 870 MHz frequency range
• Low profile surface mount packaging for automated assembly

Applications

• RF front-end filtering in wireless communication modules
• Signal conditioning in ISM band transceivers
• General purpose RF applications requiring 869 MHz center frequency

Procurement Notes

Verify the specific manufacturer documentation for the SF2137D to confirm current production status and exact mechanical dimensions. Ensure compatibility with your PCB layout regarding the SM3838-6 footprint. Cross-reference technical specifications against your system requirements for impedance matching and voltage handling capabilities before finalizing procurement decisions.

Selection Notes

Select this component when a SAW filter is required for 869 MHz applications with a 2 MHz bandwidth. Consider the 50 Ohm impedance match and 3 V voltage rating relative to your circuit design. Evaluate the SM3838-6 package size against available board space. Confirm that the specified attenuation characteristics meet your system's interference rejection needs.

Part Context

The SF2137D belongs to the RFMi family of SAW filters, which are part of Akoustis' broader portfolio of RF components. These devices utilize Surface Acoustic Wave technology to provide precise frequency selection and signal conditioning. The product line targets digital and wireless applications requiring reliable performance in compact form factors.

Replacement Considerations

Publicly confirmed substitute part numbers for the SF2137D were not identified in the provided source material. Consult official manufacturer documentation or authorized distributors for verified cross-reference data.