Compact PDM MEMS Microphone – Smart Devices & IoT

Ultra-low power PDM digital output MEMS microphone with 61dB SNR and -29dBFS sensitivity. Consumes only 0.54mA, perfect for battery-powered devices. Compact 4.00×3.00×1.10mm size for smart home, wearables, and IoT applications.

Model: ECM-M4030-2961D
Dimensions: 4 × 3 × 1.1 mm
Directivity: Omnidirectional
Sensitivity: -29 dB ± 3
S/N Ratio: 61 dB
Max SPL: 100 dB
Operating Voltage: 2 Vdc
Frequency Response: 100 Hz ~ 10 kHz
Current Consumption: 540 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-M4030-2961D is a high-sensitivity, low-power PDM digital output MEMS microphone designed for applications requiring high-fidelity audio capture and far-field voice recognition. With excellent 61dB SNR and ultra-low 0.54mA current consumption, it is ideal for battery-powered portable devices. Sensitivity of -29dBFS ±3dB enables subtle sound capture even in far-field scenarios. A wide operating voltage range (1.6V – 3.6V) and PSR of -90dB provide stable operation across diverse power environments. Its compact 4.00mm x 3.00mm x 1.10mm form factor makes it easy to integrate into smart home devices, wearables, and IoT applications.

Application Scenarios

Smart home devices, such as smart speakers and smart light bulbs, for far-field voice control and ambient sound detection.
Wearable devices, such as smartwatches and earbuds, where its low power and compact size are ideal.
IoT devices, including smart sensors and security systems, enabling remote voice monitoring and voice interaction.

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.