SmartSound™ MEMS Microphones

When I click on the AN-000298 thread it just takes me back to the login screen. All the other threads take me to the actual thread. What is going on?

Hi everyone.
I want to build a phantom XLR microphone for audio measurements on speakers and their enclosures, to be used in conjunction with a sound card. One possible candidate is the ICS-40730, but I also need the ideal preamplifier. I'm not sure which one to choose, and that's what I'm asking for your advice. I've identified a few solutions, which I'll list below. Let me know if there's a suitable one:
- INA166
- OPA1637
Hi and thanks

Hi everyone,

I’m testing a T5848 microphone with the goal of recording audio (mono) and logging it on an SD card using a nRF54L15DK microcontroller.
However, I’m currently getting no data on the microphone output, and I’m trying to determine why.

Setup : - Microcontroller: nRF54L15DK
- Microphone: T5848
- uC I/O voltage: 1.8 V (in final design 3.3V with a level shifter)
- Microphone board voltage: 3.3 V (LDO + components)

Tests performed : I have tried to test the microphone without AAD first in both LPM and HQM.

Dears,
Kindly let me know the link to download the drivers for the T3902 and T5837 MEMS Microphone and the corresponding documentation.
Also please point me to the EVK for the same MICs.
Thanks,
S

We have four ICS-43434 microphones connected to an ESP32 on a custom PCB. During manufacturing, we've noticed a high failure rate: on many boards, one of the microphones either produces excessive noise or does not respond at all. Out of 10 PCBs assembled, 6 exhibit these issues. We're trying to determine whether this problem is related to our design, assembly process, or just due to component variability. Has anyone experienced something similar or can offer advice on possible root causes?

Hello. We have been using ICS-41350 microphones for several years, with 2 microphones in each product. We have already assembled several thousand products using the same technology, taking into account all your recommendations for installing and soldering MEMS microphones.

Hello,

Does TDK offer a direct replacement for the INMP441 MEMS microphone?
Looking specifically for a replacement MEMS microphone with the attached graph in terms of Amplitude vs. Frequency.

Thank you,

In my keenness to work with this microphone, I overlooked one major parameter - that it is meant to run at 1.8V max. I was reading data from the device and had tested it for several hours before I realised my mistake. (I was very happy with the performance of the mic to that point). I thought I might as well continue testing with the over-voltaged part ( I didn't want to waste my soldering efforts, see picture) and I wrote the one-wire interface and tested that at 3V too (AAD A mode) - again happy with the results.

Our team is currently using the T3902 MEMs mic in the cellular modem signal chain in one of our wearable products. We're currently experiencing difficulty with echo cancellation and are investigating root causes. One potential root cause is mechanical coupling between mic and speaker but I'm also interested in investigating the role that mic pattern may play in this issue. Is there a part number with a pattern other than omni (cardioid, etc) that is pin compatible with the T3902? If so, I'd be really interested in giving it a try.

We are testing the TDK T3902 for use as a PDM microphone connected to the ESP32-S3. I have a simple test PCB set up and the samples I am getting have a sizable baseline offset. We have sampled at 11025 and 22050 and same result. Any suggestions on what would be causing this?