Ultra-Compact Analog MEMS Microphone – High Sensitivity & Low Power

application scenarios for action cameras

The ECM-M2718-4256M is an ultra-compact analog MEMS microphone designed for high sensitivity and reliability in space-constrained consumer electronics. It combines a MEMS microphone element, an impedance converter, and an output amplifier to deliver exceptional audio performance. With its omnidirectional sound capture and strong RF immunity, this microphone is perfect for applications requiring clear audio in challenging environments.

Model: ECM-M2718-4256M
Dimensions: 2.75 × 1.85 × 0.95 mm
Directivity: Omnidirectional
Sensitivity: -42dB±3
Impedance: 300Ω
S/N Ratio: 56dB
Operating Voltage: 2.1Vdc
Frequency Response: 100Hz~10KHz

Tags: #Equipment

Performance Overview

The ECM-M2718-4256M boasts a sensitivity of -42±3dB, ensuring clear audio capture even in low-volume settings. Its ultra-compact size of 2.75mm x 1.85mm x 0.95mm makes it ideal for devices with extremely limited space, such as wearables. Operating within a voltage range of 1.5V to 3.6V, it is highly efficient and suitable for battery-powered devices. The microphone also features robust ESD protection (±8kV contact discharge) and operates reliably across a wide temperature range of -40℃ to +100℃.

Application Scenarios

Wearable Devices: Its ultra-compact size and low power consumption make it ideal for smartwatches, fitness trackers, and other wearable devices.
Cameras: Suitable for security cameras, action cameras, and other devices requiring clear audio in noisy environments.
Portable Electronics: Its high sensitivity and RF immunity make it perfect for smartphones, tablets, and other portable devices.

Standard Test Circuit

Typical Frequency Response

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.