SPC18P8LM4H-1

Overview

The SPC18P8LM4H-1 is a miniature, high-performance, low-power digital MEMS microphone utilizing SiSonic technology. It features a bottom-port design and single-bit PDM output. Key electrical parameters include a sensitivity of -26 dBFS, an SNR of 65 dBA, and a frequency range of 25 Hz to 20 kHz. Operating voltage ranges from 1.65 V to 3.6 V, with power consumption varying between 260 uA in low-power mode and 1.675 mA in standard mode. The device has a depth of 1 mm.

Feature Summary

• Utilizes proven high-performance SiSonic MEMS technology for reliable acoustic performance.
• Features a bottom-port configuration suitable for compact device integration.
• Provides a single-bit PDM digital output interface for direct connection to processors.

Applications

• Voice-enabled smart home devices
• Wearable audio electronics
• IoT voice recognition modules

Procurement Notes

Verify the specific suffix and package type against official Syntiant documentation before ordering. Confirm that the required operating voltage and current modes align with your system's power budget. Ensure compatibility with your host processor's PDM interface specifications. Check for any recent lifecycle status updates or alternative recommendations directly from the manufacturer.

Selection Notes

Select this component when a low-profile, bottom-port digital microphone is required for space-constrained designs. Consider the trade-off between the 260 uA low-power mode and the 1.675 mA standard mode based on battery life requirements. Ensure the 65 dBA SNR meets the noise floor requirements of your target application environment.

Part Context

This part belongs to the Syntiant SiSonic family of silicon microphones. These components are designed to replace traditional analog MEMS microphones by integrating signal conditioning and ADC functions directly onto the die. This integration reduces board-level noise and simplifies system architecture.

FAQ

What is the acoustic overload point (AOP) for the SPC18P8LM4H-1?

Official datasheets do not explicitly state the AOP value for this specific model; only sensitivity and SNR are provided.

Does the SPC18P8LM4H-1 support I2S output?

No, the device outputs a single-bit PDM (Pulse Density Modulation) signal, not I2S.