SPM0408LE5H

Overview

The SPM0408LE5H is an analog omnidirectional MEMS microphone from the SiSonic series by Knowles. It features a sensitivity of -18 dB, a signal-to-noise ratio of 63 dB, and an impedance of 200 Ohms. The device operates within a frequency range of 100 Hz to 10 kHz, drawing 350 uA at a supply voltage of 3.6 V. Its physical dimensions are 4.72 mm in length, 3.76 mm in width, and 1.35 mm in depth.

Feature Summary

• Omnidirectional acoustic port design for uniform sound capture
• Analog output interface for direct signal processing
• Low power consumption suitable for battery-operated devices

Applications

• Voice recognition systems
• Smart home audio interfaces
• Portable consumer electronics

Procurement Notes

Verify the manufacturer designation carefully, as this component is associated with both Syntiant and Knowles Acoustics due to corporate history. Confirm the specific suffix (e.g., TB) matches your required packaging format. Ensure compatibility with RoHS standards and moisture sensitivity levels before integration into production lines.

Selection Notes

Select this model when high signal-to-noise ratio and low current draw are critical. The 200 Ohm impedance requires appropriate pre-amplifier matching. Verify that the 3.6 V operating voltage aligns with your system's power rails. Consider the 1.35 mm height constraint for thin form-factor designs.

Part Context

This component belongs to the SiSonic family of MEMS microphones, originally developed by Syntiant and later integrated into Knowles Acoustics. The SPM series represents a line of high-performance analog microphones designed for voice-centric applications requiring reliable performance in compact spaces.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with SP0408LE5H-SB or SPM0192LR5H-1 only if electrical parameters and pinouts are verified against official datasheets.