Compact PDM MEMS Microphone – Smart Devices & IoT

application scenarios for smart speakers

application scenarios for security systems

The ECM-M4030-2961D is a high-sensitivity, low-power digital MEMS microphone designed for applications requiring high-fidelity audio capture and far-field voice recognition. With its excellent signal-to-noise ratio (SNR) and low current consumption, this microphone is an ideal choice for smart home devices, wearables, and IoT applications. It features a compact form factor of just 4.00mm x 3.00mm x 1.10mm, making it easy to integrate into space-constrained designs.

Model: ECM-M4030-2961D
Dimensions: 4 × 3 × 1.1 mm
Directivity: Omnidirectional
Sensitivity: -29dB±3
S/N Ratio: 61dB
Operating Voltage: 2Vdc
Frequency Response: 100Hz~10KHz

Tags: #Equipment

Performance Overview

The ECM-M4030-2961D stands out for its low power consumption and high SNR. With a typical current consumption of only 0.54mA, it is well-suited for battery-powered portable devices. Its sensitivity of -29±3dB enables it to capture subtle acoustic signals, delivering outstanding performance even in far-field voice scenarios. The 61dB SNR ensures clean and clear audio signals with minimal background noise. A wide operating voltage range (1.6V – 3.6V) offers flexibility in power design, while a power supply rejection ratio (PSR) of -90dB further enhances stability in noisy environments.

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.

Standard Test Circuit

Typical Frequency Response

Appearance Dimension

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.