SPK0641HT4H-1

Overview

The SPK0641HT4H-1 is a digital MEMS microphone from the SiSonic series, manufactured by Syntiant. It features a top-port design with an omnidirectional response and PDM output. Key electrical parameters include a signal-to-noise ratio of 64.5 dBA, sensitivity of -26 dB ±1dBV at 94 dB SPL, and a frequency range of 20 Hz to 20 kHz. Operating voltage ranges from 1.6 V to 3.6 V, with a typical current consumption of 800 µA. The device supports a maximum sound pressure level of 120 dB SPL and offers a power supply rejection ratio of 70 dB.

Feature Summary

• Digital PDM output interface for direct connection to processors
• Top-port acoustic design for omnidirectional sound capture
• High signal-to-noise ratio performance for clear audio acquisition
• Low power consumption suitable for battery-operated devices

Applications

• Voice recognition systems
• Smart home voice assistants
• Mobile communication devices
• IoT audio sensors

Procurement Notes

Verify the specific suffix and revision code against the manufacturer's latest datasheet to ensure compatibility with your system requirements. Confirm RoHS compliance status and moisture sensitivity level before procurement. Check for any obsolescence notices or lifecycle changes directly from Syntiant authorized distributors. Ensure ordering quantities align with standard packaging formats such as cut tape or reel options provided by suppliers.

Selection Notes

Select this component when a high SNR digital microphone with a top-port configuration is required. Compare current consumption figures against other SiSonic models if power efficiency is critical. Verify that the PDM interface matches the host processor's digital audio interface capabilities. Consider the physical dimensions and mounting style for PCB layout constraints.

Part Context

This part belongs to the SPK series of digital MEMS microphones from Syntiant. It is designed for applications requiring high-fidelity audio capture in compact form factors. The SiSonic technology integrates the MEMS sensor and ASIC on a single silicon die. This model is distinct from bottom-port variants like the SPH series.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.