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Product Detailed Parameters
- Description：TITAN DIGITAL BOTTOM PART MIC
- Series：SiSonic™
- Mfr：Syntiant
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：MEMS (Silicon)
- Output Type：Digital, PDM
- Direction：Omnidirectional
- Frequency Range：10 Hz ~ 10 kHz
- Sensitivity：-37dB ±1dB @ 94dB SPL
- S/N Ratio：68.5dB
- Impedance：-
- Voltage Range：1.65 V ~ 1.98 V
- Current - Supply：185 µA
- 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" (1.10mm)
- Shape：Rectangular
- Grade：-
- Qualification：-
- Voltage - Rated：1.8 V
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Overview
The SPH18R1LM4H-1 is a miniature, high-performance, low-power digital MEMS microphone manufactured by Syntiant. It features a bottom port design and delivers a single-bit PDM output. Key electrical specifications include a signal-to-noise ratio of 68 dB, a maximum sound pressure level of 128 dB SPL, and a sensitivity of -37 +/-1 dBV. The device operates at a nominal voltage of 1.8 V with a power consumption of 180 uA in low-power mode. It exhibits a frequency response starting at 30 Hz and provides 84 dB of power supply rejection ratio.
Feature Summary
- Integrates a bottom port acoustic structure for versatile mounting flexibility.
- Delivers a single-bit PDM digital output to simplify system integration.
- Optimized for ultra-low power consumption suitable for battery-operated devices.
Applications
- Voice-controlled smart home assistants
- Wearable audio recording devices
- Hands-free communication modules
Procurement Notes
Verify the specific suffix and tape/reel configuration against the manufacturer's official datasheet before ordering. Confirm that the component meets all required environmental certifications and RoHS compliance standards for your target market. Ensure compatibility with your PCB footprint and reflow soldering profile requirements.
Selection Notes
Select this component when a bottom-port configuration is required for compact form factors. It is suitable for applications demanding high acoustic performance combined with minimal power draw. Compare the 68 dB SNR and 128 dB SPL limits against your specific acoustic environment requirements.
Part Context
This part belongs to Syntiant's SiSonic family of digital microphones. These components are designed to replace analog counterparts by providing integrated amplification and ADC functionality within a small package. The SPH18R1LM4H-1 represents a specialized variant optimized for bottom-port acoustic coupling.
Replacement Considerations
Consult official substitution lists for verified equivalents. Cross-reference pinouts and acoustic characteristics carefully when considering alternative manufacturers.
FAQ
What is the output format of the SPH18R1LM4H-1?
The device outputs a single-bit Pulse Density Modulation (PDM) signal.
Does this microphone use a top or bottom port design?
It utilizes a bottom port design for acoustic input.
