TDK Corporation Announces an Expansion of its Ultra-Low Noise MEMS Microphone Family with the ICS-40740
January 09, 2018 at 08:00 am
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TDK Corporation announced an expansion of its ultra-low noise MEMS microphone family with the ICS-40740, delivering 70 dB (A) SNR with 133 dB sound pressure level Acoustic Overload Point. The low self-noise coupled with wide dynamic range makes the ICS-40740 ideal for voice controlled IoT applications, especially those with integrated loudspeakers, as well as wearable applications like noise-cancelling headsets. A microphone’s Signal to Noise Ratio (SNR) has long been recognized as a key specification to enable far-field voice capture. But as the smart speaker market has shown, the capability of these microphones to operate in a very loud environment is also critical to enable the user to interrupt loud audio with spoken commands. The ICS-40740 performs in both demanding respects. Beyond simple SNR and dynamic range, the ICS-40740 performs across a very wide frequency band, from 80 Hz to 20 kHz. The sensitivity tolerance of ±1 dB also makes it ideal for use in an array with very consistent performance from unit to unit. Wearable noise-cancelling applications are also a fit for the ICS-40740. With a 4 mm by 3 mm by 1.2 mm package and consuming only 155 uA in operation, the ICS-40740 fits both the size and power budget of a noise-cancelling headset. The ICS-40740 is sampling now to select customers and is slated for production in the second quarter of 2018. The ICS-40740 leverages a proven, robust supply chain for fabrication, packaging and test for smooth launch into high volume consumer applications. Glossary: dB: decibel; SPL: Sound Pressure Level; MEMS: Micro Electrical Mechanical Systems; SNR:Signal to Noise Ratio; AOP: Acoustic Overload Point. Key applications: ICS-40740: Voice controlled speakers; Noise-cancelling headsets; Teleconferencing; Security and surveillance; Microphone arrays; Voice control and activation. Main features and benefits: High SNR ICS-40740 70 dBA; High AOP ICS-40740 133 dB SPL; 20 kHz bandwidth; Very tight tolerances for array processing.
TDK Corporation specialises in the design, manufacture and sales of electronic products and recording equipment. Net sales break down by family product as follows:
- rechargeable batteries and energy converters (46.9%);
- electronic equipment and components (33.1%): ceramic capacitors, ferrites, magnets, inductors, high-frequency components, transformers, converters, thermistors, etc.;
- recording equipment (13.5%): recording appliances (notably magnetic heads for hard disks, heads for disk drives and thermal printer heads), recording equipment (audio and video cassettes, optical disks, computer data storage tapes, PC cards, etc.);
- other (3.5%): rechargeable batteries, memory cards, displays and mechatronic equipment.
Net sales break down geographically as follows: Japan (8%), China (56.8%), Asia (18.7%), Europe (10%) and Americas (6.5%).