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Product Detailed Parameters
- Description：MIC MEMS DIGITAL PDM OMNI -37DB
- Series：SiSonic™ SPH
- Mfr：Syntiant
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：MEMS (Silicon)
- Output Type：Digital, PDM
- Direction：Omnidirectional
- Frequency Range：20 Hz ~ 10 kHz
- Sensitivity：-37dB ±1dB @ 94dB SPL
- S/N Ratio：65.5dB
- Impedance：-
- Voltage Range：1.6 V ~ 3.6 V
- Current - Supply：1.4 mA
- Port Location：Bottom
- Ratings：-
- Termination：Solder Pads
- Size / Dimension：0.138" L x 0.104" W (3.50mm x 2.65mm)
- Height (Max)：0.043" (1.08mm)
- Shape：Rectangular
- Grade：-
- Qualification：-
- Voltage - Rated：-
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Overview
The SPH0644LM4H-1 is a SiSonic digital MEMS microphone featuring an omnidirectional acoustic port located at the bottom. It operates within a supply voltage range of 1.6 V to 3.6 V and draws 1.4 mA of operating current. The device provides a sensitivity of -37 dB ±1 dB at 94 dB SPL and achieves a signal-to-noise ratio of 65.5 dBA. Its frequency response spans from 20 Hz to 10 kHz. The component utilizes a PDM digital output interface and is housed in a rectangular LGA-5 package measuring 3.5 mm by 2.65 mm.
Feature Summary
- Integrates a silicon-based MEMS sensor with a digital PDM output interface for direct connectivity to host processors.
- Features a bottom-port acoustic design suitable for applications requiring specific board layout constraints.
- Operates on a wide supply voltage range, supporting both 1.8 V and 3.3 V logic systems.
Applications
- Voice recognition modules
- Smart home audio devices
- Hands-free communication systems
Procurement Notes
Verify component status before integration as it is marked as not recommended for new designs. Confirm RoHS compliance details via official documentation. Ensure ESD handling protocols are followed during assembly. Check for valid datasheet versions to confirm electrical characteristics. Validate package dimensions against PCB footprint requirements.
Selection Notes
Select this component when a low-profile digital microphone with bottom-port access is required. Consider the 65.5 dBA SNR for standard voice capture needs. Evaluate the 1.4 mA current consumption against battery life requirements. Ensure the host system supports PDM interfaces. Verify compatibility with the 1.6 V to 3.6 V operating voltage range.
Part Context
This part belongs to the Syntiant SiSonic SPH series, which focuses on digital MEMS microphones. The SPH0644LM4H-1 represents a Cornell-series variant designed for general-purpose voice applications. It shares the LGA-5 form factor common to this family, ensuring mechanical compatibility with other similarly sized sensors in the lineup.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided source material. Consult manufacturer documentation for potential obsolescence management strategies or alternative series recommendations.
