SPH1878LR5H-1

Overview

The SPH1878LR5H-1 is a SiSonic MEMS microphone manufactured by Syntiant. It features an analog differential output and bottom port configuration. Key electrical parameters include a sensitivity of -44 dB (±1 dB) for single-ended and -38 dB (±1 dB) for differential modes, measured at 1 V/Pa reference. The device achieves a signal-to-noise ratio of 67 dB and supports a maximum sound pressure level of 134 dB SPL. It operates on a supply voltage of 2.7 V with a power supply rejection ratio of 85 dB at 7 Hz. The component functions within a temperature range of -40°C to +100°C.

Feature Summary

• High acoustic performance with 67 dB signal-to-noise ratio
• Analog differential output capability for noise reduction
• Robust operation under high sound pressure levels up to 134 dB SPL

Applications

• Voice recognition systems requiring high fidelity audio capture
• Smart home devices utilizing far-field microphone arrays
• Wearable technology demanding low-power analog audio sensing

Procurement Notes

Verify the specific suffix against official Syntiant documentation to confirm exact packaging and tolerance variations. Ensure compatibility with existing PCB layouts regarding the bottom-port acoustic path. Confirm RoHS compliance status through current manufacturer declarations before finalizing procurement orders.

Selection Notes

Select this model when analog differential signaling is required to minimize electromagnetic interference in compact designs. The wide operating temperature range makes it suitable for automotive or industrial environments. Evaluate the 2.7 V supply requirement against system power rails to ensure adequate headroom for stable operation.

Part Context

This component belongs to the Syntiant SiSonic series of MEMS microphones. It represents a specialized analog solution designed for integration into complex audio processing architectures. The product line focuses on delivering high-performance acoustic sensing with minimal power consumption for embedded applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.