TDK Releases World’s Lowest-power PDM Microphone

June 22, 2020 Perry Cohen

TDK Corporation released its InvenSense T3902 pulse density modulation (PDM) microphone for consumer devices. The company said in a press release that it is the world’s lowest power PDM.

The ultra-low power, low noise, multi-mode bottom-port MEMS microphone enhances voice-based application being used in devices and homes. The T3902 features 185 µA ultra-low power mode, high SNR of 64.5 dB, and high Acoustic Overload Point (AOP) of 120 dB in a size of 3.5 mm x 2.65 mm x 0.98 mm.

Furthermore, the InvenSense T3902 offers the SNR at a frequency bandwidth up to 20kHz.

Other features include:

  • High power supply rejection (PSR): −97 dB FS
  • Fourth‐order Σ‐Δ modulator
  • Digital pulse density modulation (PDM) output
  • Compatible with Sn/Pb and Pb‐free solder processes
  • RoHS/WEEE compliant

Per the release, the new microphone allows OEMs to differentiate products offerings by improving consumer experience with reduced power consumption.

For more information, visit

About the Author

Perry Cohen

Perry Cohen, associate editor for Embedded Computing Design, is responsible for web content editing and creation in addition to podcast production. He also assists with the publication’s social media efforts which include strategic posting, follower engagement, and social media analysis. Before joining the ECD editorial team, Perry has been published on both local and national news platforms including (Phoenix), (Phoenix),, Cronkite News, and MLB/MiLB among others. Perry received a BA in Journalism from the Walter Cronkite School of Journalism and Mass Communications at Arizona State university. He can be reached by email at <a href=""></a>. Follow Perry’s work and ECD content on his twitter account @pcohen21.

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