SPM1423HM4H.B

Overview

The SPM1423HM4H-B is a miniature, high-performance, low-power silicon digital MEMS microphone featuring a top-port design and single-bit PDM output. It operates within a voltage range of 1.6 V to 3.6 V and delivers an omnidirectional frequency response spanning 100 Hz to 10 kHz. The device provides a sensitivity of -22 dB (±3 dB) at 94 dB SPL and achieves a signal-to-noise ratio of 61.5 dB.

Feature Summary

• Compact top-port silicon MEMS construction for space-constrained designs
• Single-bit PDM digital output interface eliminating analog conversion needs
• Omnidirectional acoustic pickup pattern for uniform sound capture

Applications

• Voice-activated consumer electronics
• Portable audio recording devices
• Smart home voice assistants

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required electrical characteristics. Check current lifecycle status as this part may be obsolete or subject to supply constraints. Ensure compatibility with existing PCB footprints and soldering profiles before integration.

Selection Notes

Select this component when a small form factor and digital interface are required. Consider the 1.6 V to 3.6 V supply range for system power budgeting. Evaluate the 61.5 dB SNR against application noise floor requirements. Verify that the top-port orientation aligns with the mechanical enclosure design.

Part Context

This microphone belongs to the SiSonic family of digital MEMS sensors produced by Syntiant. It represents a class of miniaturized acoustic transducers designed to replace traditional analog microphones in modern digital systems. The technology integrates the sensing element and signal conditioning on a single silicon substrate.

Replacement Considerations

Public confirmed substitute part numbers: SPH0141LM4H-1-8.