In an exciting development for audio technology enthusiasts, WorldWide WCE has introduced its latest range of MEMS (Micro-Electro-Mechanical Systems) microphones. These cutting-edge devices integrate a specialized preamplification ASIC, elevating them to new levels of sensitivity and signal-to-noise ratio (SNR) performance. Not only do they boast a compact design, but they also outperform most competitors on the market with their ultra-low power consumption, minimal distortion, and impressive dynamic range.
The applications for these innovative microphones are vast and varied. They are ideal for security systems such as glass break detection and fire alarms, industrial applications such as machine monitoring for predictive maintenance and operator safety, as well as in microphone arrays and consumer electronics including headsets and smart IoT devices.
Key features of the new WorldWide WCE MEMS microphones:
- Exceptionally high signal-to-noise ratio
- Unparalleled high sensitivity
- Ultra low current consumption
- Compact surface mount design
What distinguishes MEMS microphones?
MEMS microphones represent a fusion of mechanical elements, sensors, and electronic circuits on a silicon substrate, made possible by advanced microfabrication technology. These microphones offer several advantages over traditional electret condenser microphones (ECM):
- Improved power supply noise isolation: Thanks to a charge pump that maintains a constant charge on the diaphragm, MEMS microphones are less susceptible to charge decay and sensitivity changes due to changes in power supply voltage.
- Moisture Condensation Recovery: The charge pump renews the diaphragm charge after the condensation dries, ensuring consistent performance.
- Reduced sensitivity to vibration and dust: Lower diaphragm mass and robust construction improve durability.
- Superior Temperature Performance: MEMS microphones operate reliably over a wide temperature range (-40°C to +100°C), withstanding standard lead-free soldering profiles without performance degradation.
- Automated manufacturing: This results in better overall repeatability and custom configuration options.
Understanding how MEMS microphones work
MEMS microphones consist of a MEMS sensor and an ASIC. The sensor comprises a pressure-sensitive diaphragm, a perforated stationary plate, and a housing. The sound pressure is converted into capacitance changes, which are then processed by the ASIC into digital or analog outputs. The interaction of the diaphragm and plate under acoustic influence creates a variable capacitor, generating an AC voltage, the microphone's output signal.
Digging deeper into the components
The diaphragm, a key component, is a thin membrane that reacts to incoming sound waves, altering capacitance by changing its distance from the backplate. The backplate and the air gap between it and the diaphragm are crucial in defining the microphone's sensitivity and signal-to-noise ratio.
Innovative power supply design
WorldWide WCE analog MEMS microphones are uniquely designed to be unaffected by slight variations in power supply voltage. Unlike traditional ECMs, they do not require a bias resistor, and a simple decoupling capacitor is sufficient to filter out power supply noise.
Digital output options and power modes
WorldWide WCE also offers digital MEMS microphones with PDM and I2S data formats, with a Left/Right channel selection for stereo audio capture. These microphones come with various power modes such as Full Power, Low Power and Sleep, suitable for battery-powered systems, ensuring efficient power consumption.
A revolution in sound technology
WorldWide WCE’s new MEMS microphones are not just an incremental improvement, but a significant leap forward in audio technology. They open up new possibilities in a number of fields, from security to consumer electronics, marking an exciting era in the world of sound and technology.
Innovation in sound technology