TDK’s SmartSound™ family of digital MEMS microphones deliver high signal to noise ratio (SNR) and unique features like Acoustic Activity Detect (AAD) at the lowest power in the industry, making them suitable for a wide range of consumer, IoT, and Edge AI applications.
Pioneers in AAD
First to bring AAD to market - proven technology that intelligently wakes the audio chain only when sound matters.
Highest performance with PDM or I²S
Studio‑quality digital capture with flexible I/O to fit any system architecture.
Lowest power digital mic
Microamp‑class operation designed for always‑on devices and ultra‑long field life.
Low latency
Exceptional signal‑to‑noise with a minimal delay profile for clear, natural audio capture.
First to bring AAD to market - proven technology that intelligently wakes the audio chain only when sound matters.
Studio‑quality digital capture with flexible I/O to fit any system architecture.
Microamp‑class operation designed for always‑on devices and ultra‑long field life.
Exceptional signal‑to‑noise with a minimal delay profile for clear, natural audio capture.
See how TDK’s SmartSound™ T5848 microphones bring ultra-low-power Audio AI to life. From wearables to smart speakers, discover how Acoustic Activity Detect (AAD) enables always-on intelligence without draining battery. Watch the full interview with TDK InvenSense VP Uday Modoi at Sensors Converge 2024.
Applications for TDK MEMS microphones
Sound smart with TDK MEMS microphones
Access documentation for this line of analog microphones.
Product is EOL and not recommended for new designs
Compact, reliable, and ultra-low-power, delivering superior sound quality and Acoustic Activity Detection with built-in digital output.
The T5838 is a low noise, high AOP digital Pulse Density Modulation (PDM) microphone using a fifth-order Σ‑Δ modulator. It also features Acoustic Activity Detect (AAD), a new ultra-low power edge processing feature consuming as low as 20 µA.
Browse our SmartSound sensors portfolio
Bottom Port PDM Digital Output Multi‑Mode Microphone
The T5837 is a low noise, high AOP digital Pulse Density Modulation (PDM) microphone using a fifth-order Σ‑Δ modulator.
Bottom Port PDM Digital Output Multi‑Mode Microphone
The T5838 is a low noise, high AOP digital Pulse Density Modulation (PDM) microphone using a fifth-order Σ‑Δ modulator. It also features Acoustic Activity Detect (AAD), a new ultra-low power edge processing feature consuming as low as 20 µA.
Bottom Port I²S Digital Output Multi‑Mode Microphone
The T5848 is a low noise, high AOP I²S microphone with a 24‑bit PCM output for direct connection to a wide variety of SoCs. It also features Acoustic Activity Detect (AAD), a new ultra-low power edge processing feature consuming as low as 20 µA.
Explore our comprehensive development platforms custom developed for each sensor type.
Evaluation version of the ICS-40638
Note: The ICS-40638 and ICS-40638 EVB are marked as EOL and are not recommended for new designs.
Simple evaluation board which allows for quick evaluation of the ICS-40638 analog MEMS microphone. The small size and low profile of the flexible PCB enables direct placement of the microphone into a prototype or an existing design for an in situ evaluation. The evaluation board consists of a bottom port microphone soldered to a flexible PCB with color-coded wires attached. The only other component on the board is a 0.1μF supply bypass capacitor.
Please refer to the App Note below “AN-000048 – PDM Digital Output MEMS Microphone Flex Evaluation Board User Guide” for more detailed information.
The ICS-40638 is an analog MEMS microphone with very high dynamic range and capable of operation up to 105°C. The ICS-40638 includes a MEMS microphone element, an impedance converter, and a differential output amplifier.
Other high-performance specifications include 138 dB SPL acoustic overload point, tight ±1 dB sensitivity tolerance and enhanced immunity to both radiated and conducted RF interference.
The ICS-40638 is available in a small 3.50 mm × 2.65 mm × 0.98 mm bottom port surface-mount package.
Discover the analog advantage with pure, natural audio capture
Our analog microphones deliver clean, natural sound with the low noise and high sensitivity that audio engineers trust. Unlike digital microphones- which include onboard converters and are optimized for plug-and-play system integration-analog microphones provide a direct, uncompressed audio signal path.
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