TDK claims T3902 is world’s lowest power PDM microphone

Designed for use in mobile devices, wearables, headsets and TV remotes, the InvenSense T3902 digital microphone is supplied in a 3.5 x 2.65 x 0.98mm package.

It is versatile, supporting far-field communication (video and phone conference) while enabling clear audio capture in loud conditions, says TDK.

It is also claimed to be the world’s lowest power pulse density modulation (PDM) microphone for mobile, IoT and other consumer devices. The low power, low noise, multi-mode bottom-port MEMS microphone offers an efficient 185 microA low power mode, high SNR of 64.5 dB, and high acoustic overload point (AOP) of 120 dB.

The microphone’s always-on functionality in low-power mode enables immediate accessibility upon wake command.

The T3902 microphone enables OEM partners to differentiate products by improving the consumer experience with reduced power consumption. This is especially critical to wearable and IoT designs where reduced board space and battery size are critical design elements.

The InvenSense T3902 is available from multiple distributors worldwide.

TDK was established in 1935 to commercialise ferrite, a key material in electronic and magnetic products. TDK’s portfolio features passive components such as ceramic, aluminium electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. The company also provides sensors and sensor systems such as temperature and pressure, magnetic and MEMS sensors. In addition, TDK provides power supplies, energy devices and magnetic heads. The products are marketed under the brands TDK, Epcos, InvenSense, Micronas, Tronics and TDK-Lambda.

TDK focuses on demanding markets in automotive, industrial and consumer electronics, and information and communications technology.

InvenSense is a TDK company, providing micro electrical mechanical systems (MEMS) sensor platforms. InvenSense supplies customers in the consumer electronics and industrial areas with integrated motion, sound and ultrasonic products. InvenSense combines MEMS sensors, such as accelerometers, gyroscopes, compasses, microphones, and ultrasonic 3D-sensing with proprietary algorithms and firmware that intelligently process, synthesise and calibrate the output of sensors, maximising performance and accuracy. InvenSense’s motion tracking, ultrasonic, audio, fingerprint, location platforms and services can be found in mobile, wearables, smart homes, industrial, automotive and IoT products.

InvenSense is headquartered in San Jose, California, USA.

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