SPM0405HE4H

Overview

The SPM0405HE4H is a silicon MEMS digital microphone manufactured by Syntiant, operating within a voltage range of 1.6 V to 3.6 V. It features an omnidirectional acoustic port and delivers a sensitivity of -26 dB ±3 dB at 94 dB SPL. The device provides a signal-to-noise ratio of 56 dB and operates with a supply current of 600 µA. Its frequency response spans from 100 Hz to 10 kHz. The component utilizes a PDM digital output interface and is housed in a rectangular LGA-6 package measuring 4.72 mm in length, 3.76 mm in width, and 1.35 mm in maximum height.

Feature Summary

• Integrates a silicon MEMS sensor with a digital PDM output interface for direct connectivity to processors.
• Features an omnidirectional top-port design for consistent acoustic capture across all angles.
• Operates on low power consumption with a supply current of 600 µA within the specified voltage range.

Applications

• Voice recognition systems requiring low-power always-on listening capabilities
• Smart home devices utilizing edge AI processing for local command execution
• Wearable technology where compact form factors and minimal power draw are critical

Procurement Notes

Verify the specific suffix and revision level against official Syntiant documentation before procurement, as manufacturing sources may vary between Knowles Electronics and Syntiant. Confirm availability status directly with authorized distributors, as this component may be subject to discontinuation or lifecycle changes. Ensure compatibility with existing PCB footprints and soldering profiles during integration planning.

Selection Notes

Select this component when a digital PDM interface is required to reduce analog noise susceptibility in noisy environments. The 56 dB SNR and -26 dB sensitivity offer a balance suitable for near-field voice capture applications. Consider the 1.6 V to 3.6 V operating range for compatibility with standard logic levels in portable electronics. Evaluate the 600 µA current draw against total system power budgets for battery-operated devices.

Part Context

This microphone belongs to the SiSonic family of MEMS sensors designed for edge computing applications. Unlike traditional analog microphones, it integrates signal conditioning and digitization on-chip. This architecture simplifies board layout by eliminating sensitive analog traces and reducing electromagnetic interference susceptibility common in mixed-signal designs.

Replacement Considerations

SPM0405HE4H-WB: A variant with different packaging specifications.

FAQ

What is the output interface type for the SPM0405HE4H?

The device outputs a Pulse Density Modulation (PDM) digital signal.

Does the SPM0405HE4H support omnidirectional sound pickup?

Yes, it features an omnidirectional acoustic response pattern.