SPH0655LM4H-1-8

Overview

The SPH0655LM4H-1-8 is a digital MEMS microphone from the SiSonic Cornell series by Syntiant. It features a bottom port and PDM output. Key electrical parameters include a sensitivity of -37 dBFS ±1 dB at 94 dB SPL, an SNR of 66 dBA, and a frequency range of 20 Hz to 10 kHz. Operating voltage is 1.8 V with current consumption of 260 uA (low power) or 1.85 mA (standard). Dimensions are 3.5 mm x 2.65 mm x 0.98 mm in an LGA-5 package.

Feature Summary

• Digital PDM output interface for direct connection to processors
• Bottom port acoustic design for flexible PCB mounting
• Low power operation mode for extended battery life
• High signal-to-noise ratio for clear audio capture

Applications

• Voice recognition systems
• Smart home devices
• Wearable audio equipment
• IoT voice interfaces

Procurement Notes

Verify the ordering suffix '-8' indicates reel packaging when sourcing. Confirm RoHS compliance status as detailed in official documentation. Ensure compatibility with 1.8 V supply rails. Check for specific moisture sensitivity level requirements during storage and handling procedures.

Selection Notes

Choose this model for applications requiring high SNR and low power consumption. The bottom port design suits compact enclosures. Verify that the PDM interface matches the host processor capabilities. Consider the operating temperature range of -40 C to +100 C for environmental suitability.

Part Context

Part of the SiSonic Cornell series, designed for edge AI and always-on voice processing. Syntiant integrates these microphones with neural decision processors for efficient speech detection. The component supports low-latency audio streaming for smart assistants and voice-controlled devices.

Replacement Considerations

SPH0655LM4H-1-2 is a compatible variant with identical electrical specifications but differs in packaging format. Both share the same core performance metrics and pinout configuration.