TDK‘s Low-power T5837/T5838 MEMS Microphones Offering 68dBA SNR Emerge as the Preferred Choice for Edge AI Applications
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T5838 and T5837 PDM microphones offer 68dBA SNR while consuming only 130µA in always-on mode and 330µA in high-performance mode
The T5838 PDM microphone includes an innovative Acoustic Activity Detect (AAD) feature that saves system power and prolongs battery life
Suitable for many IoT and edge AI applications including voice-activated TV remote controls, window glass break detection for home security, augmented reality glasses, wearables, action cameras, smart speakers, and TWS earbuds
June 21, 2023——TDK Corporation announces that its low-power InvenSense T5838 and T5837 digital PDM microphones, part of the SmartSound™ family, have established themselves as the microphone of choice for low-power edge AI application processors that perform keyword detection, due to its innovative Acoustic Activity Detect (AAD) feature that enables system power savings, thus prolonging battery life, and ability to intelligently detect keywords or voice commands. With their exceptional power efficiency and superb performance, offering 68 dBA SNR and consuming only 130µA in always-on mode and 330µA in high-performance mode, the T5838 and T5837 microphones enable developers to integrate voice command functionalities and audio detection capabilities into their products.
Key features and advantages of the T5838 and T5837 MEMS microphones for low-power edge AI applications include:
Lowest Power Consumption: The T5838 and T5837 consume significantly less power compared to competing solutions in the market. This extends battery life, making it the ideal choice for applications where power efficiency is paramount, particularly critical for edge AI.
Acoustic Activity Detect (AAD) Feature: The T5838 advanced AAD intelligently screens for acoustic activity indicating keywords or voice commands, allowing the application’s processor to efficiently manage power consumption during idle periods. This enables IoT and edge AI devices to remain in an always-on state, ready to respond to user interactions, without draining the battery.
Superior Performance: The microphones offer ultra-low power consumption, yet do not compromise on audio quality or performance. In high-quality mode, the T5838 and T5837 deliver 68 dBA SNR and 133 AOP while only consuming a minuscule 310μA at 1.8 v, providing excellent sound fidelity to ensure accurate keyword detection even in noisy environments.
“The low power consumption and AAD functionalities of the T5838 microphone are essential to our customers’ who are deploying energy-efficient, high-performance edge AI solutions in speech recognition and acoustic event detection,” stated Kurt Busch, Syntiant’s CEO. He further emphasized, “Syntiant has closely collaborated with TDK to maximize the use of the T5838’s AAD features with our Neural Decision Processors, aiming to deliver the most power-efficient solutions available in the market today.”
“RASynBoard is a tiny, ultra-low power, edge AI/ML board that achieves highly efficient processing of acoustic- and motion events,” stated Jim Beneke, VP, of Advanced Applications Group, Avnet. “TDK’s innovative SmartSound performance solutions continue to represent disruptive and ground-breaking products that improve end-user experience, empowering our customers and partners.”
“The combination of Syntiant’s NDP120 neural processor and our T5838 digital PDM microphone enables always-on speech recognition and audio detection capabilities for edge IoT applications,” said Uday Mudoi, VP & GM – Microphone BU, InvenSense, a TDK group company. “The Avnet RASynBoard Kit with TDK’s T5838 Microphone and ICM-4670 IMU will accelerate time to market for customers building smart edge systems.”
Glossary
AI: Artificial Intelligence
AOP: Acoustic Overload Point
SNR: Signal-to-Noise Ratio
PDM: Pulse Density Modulation
AAD: Acoustic Activity Detect
Main applications
True wireless earbuds
Voice-activated TV remote controls
Window glass break detection
Augmented reality glasses
Wearables
Action cameras
Smart speakers
Conference phone systems
Main features and benefits
Low noise digital MEMS microphone with pulse density modulation (PDM) output
Multiple operational modes: Sleep, Low Power, High Quality, and Ultrasonic Mode
Acoustic Activity Detect (AAD) modes for both Analog and Digital
SNR of 68dBA and AOP of 133 dB SPL in high-quality mode
130 µA in always-on mode and 330 µA in high-performance mode
RoHS/WEEE compliant
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