High-Performance Analog MEMS Microphone – Compact & Low Power

Low-power analog MEMS microphone with -42dBV/Pa ±1dB sensitivity, 58dB SNR, and 130dB AOP. Ultra-slim 2.24mm width ideal for TWS earbuds, smart home devices, and IoT applications.

Model: ECM-M3722T421
Dimensions: 3.76 × 2.24 × 1.1 mm
Directivity: Omnidirectional
Sensitivity: -42 dB ± 1
Impedance: 100 Ω
S/N Ratio: 58 dB
Max SPL: 130 dB
Operating Voltage: 2 Vdc
Frequency Response: 100 Hz ~ 10 kHz
Current Consumption: 250 μA

Request Information / Sample

Tell us your project stage. Our engineering team will respond accordingly.

Lead Time

Samples: 1–3 weeks
Mass production: 2–4 weeks

Customization

Application-based engineering support
Structure / sensitivity / acoustic tuning

MOQ

5,700 pcs (1 reel)
Per model / per production batch

Certification

RoHS & UL compliant
Industrial reliability assured

Technical Specifications

The ECM-M3722T421 is a low-power analog MEMS microphone designed for space-constrained applications. With precise sensitivity of -42dBV/Pa ±1dB and 58dB SNR, it delivers consistent, clear audio capture across mass production. Its 130dB SPL acoustic overload point ensures distortion-free recording even in high-volume environments. The ultra-slim design measures just 3.76mm x 2.24mm x 1.10mm, making it one of the narrowest MEMS microphones available—perfect for TWS earbuds and wearables. Operating voltage ranges from 1.5V to 3.6V with excellent RF immunity for reliable performance in wireless devices. Temperature range spans -40℃ to +100℃ for robust operation in any environment.

Application Scenarios

Bluetooth Headsets & TWS Earbuds: Ultra-low power consumption and high SNR deliver crystal-clear voice calls and immersive audio.
Smart Home Devices: Suitable for smart speakers, doorbells, and other devices requiring clear audio in noisy environments, thanks to its 130 dB AOP.
Wearable & Portable Electronics: Its miniature size and low profile fit perfectly into wearables, smart glasses, and portable recorders.

Recommended Interface Circuit

Standard Test Circuit

Frequency Response Curve

Typical Frequency Response

Dimensions (UNIT: mm)

Appearance Dimension

Packaging Overview

Use ESD-safe reel and carrier tape for packing.
Quantity per reel: 5,000 pcs.
Each reel is sealed in a moisture-proof, anti-static bag.
Strict anti-static procedures are followed during the packing process.
Label includes model number, quantity, lot number, and manufacturing date.

Reliability Tests

Thermal Shock: 100 cycles of air-air thermal shock from -40℃ to +100℃ with 15-minute soaks.

High Temperature Bias: +125℃ environment while under bias for 1000 hours.

Low Temperature Bias: -40℃ environment while under bias for 1000 hours.

Temperature/Humidity Bias: +85℃/85% relative humidity environment while under bias for 1000 hours.

Mechanical Shock: 3 pulses of 10,000g in the X, Y, and Z directions.

Vibration Test: 10～60Hz: 0.35mm; 60～500Hz: 5g, 1 octave/min, Duration: 15 minutes per plane.

Drop Test: 1.5-meter height onto a concrete surface in three directions while in packaging.

Reflow: 5 reflow cycles with a peak temperature of +260℃.

ESD Protection: 150pF, 330Ohm, contact discharge ±2KV/air discharge ±4KV, 10 times, applying voltage to I/O pins.

Sampling Process

Confirm customer requirements:

Review product application, microphone capsule specifications, usage scenarios, and sound quality needs.

Recommend and specify:

Provide recommended microphone capsule models and detailed specifications for customer evaluation.

Sample provision and testing:

Deliver microphone samples for customer testing and feedback purposes.

Optimize and finalize:

Refine microphone design based on feedback, finalize samples, and proceed to mass production upon quality approval.

Quality Assurance

Conducting sampling inspections of incoming materials to ensure compliance with standard requirements.

Performing inspection audits to ensure the stability and control of the entire manufacturing process.

Conducting pre-shipment inspections to ensure that products meet established quality standards.

Acoustic Laboratory

Testing of background noise, sensitivity, frequency response curve, and directionality indicators.

Verification of the impact of different circuits, structural dimensions, materials, and processes on indicators.

Reliability testing at both the new product design stage and the mass production regular stage.

Automatic Workshop

Utilizing fully automated production lines to ensure high efficiency and consistency.

Equipped with state-of-the-art facilities, including a 10,000-level dust-free workshop.

Employing a rigorous 21-step process to guarantee product stability.