SPM0408HE5H-SB

Overview

The SPM0408HE5H-SB is an analog MEMS microphone from the SiSonic series by Syntiant. It features a 100 Hz to 10 kHz frequency response and omnidirectional sound pickup. The device operates on a supply voltage of 1.5 V to 3.6 V with a typical current consumption of 350 µA. Sensitivity is rated at -22 dB ±3 dB @ 94 dB SPL, providing a signal-to-noise ratio of 59 dB. The component utilizes solder pad termination for surface mount integration.

Feature Summary

• Omnidirectional acoustic design for uniform sound capture
• Silicon-based MEMS construction for reliability
• Low voltage operation suitable for battery-powered systems

Applications

• Voice-controlled devices
• Smart home sensors
• Wearable audio gear

Procurement Notes

Verify the manufacturer designation carefully, as distribution sources may list Knowles or Syntiant due to historical corporate acquisitions. Confirm the specific suffix matches the required sensitivity and package variant. Check for obsolescence status, as some related models in this family have been discontinued. Ensure compatibility with existing PCB footprints before ordering.

Selection Notes

Select this model for applications requiring low power consumption and broad frequency response within a compact form factor. The analog output interface requires compatible ADC circuitry. Consider the 59 dB SNR for standard voice recognition tasks rather than high-fidelity recording. Verify voltage headroom against the 1.5 V minimum requirement.

Part Context

This component belongs to the SiSonic MEMS microphone portfolio, designed for edge AI and always-on sensing applications. Syntiant provides full-stack solutions combining neural processors with intelligent sensors. These microphones support hardware-agnostic machine learning models optimized for compute-constrained environments.

Replacement Considerations

SPM0408HD5H-SB is a documented alternative within the same series.