From whispers to rock concerts! What is a high quality "Digital MEMS microphone"?

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Base sensor Infineon

MEMS microphone with a high signal-to-noise ratio (S/N) of 69dB

"IM69D130" is a Digital MEMS microphone provided by Infineon.

It achieves 130dB SPL at maximum input sound pressure level (AOP: THD=10%) and 128dB SPL at THD=1%.

Article header library 129257 pic05 1 — Achieves high signal-to-noise ratio (S/N)

This article explains the following three features of the IM69D130.

69dB signal-to-noise ratio (S/N) for high-quality speech acquisition
Acquisition of "whispered voice" is possible with a wide dynamic range
Easy to solder to the printed circuit board. Supports reflow soldering!

1. 69dB signal-to-noise ratio (S/N) for high-quality voice acquisition

The IM69D130 achieves a high signal-to-noise ratio (S/N) of 69dB. Not only can you get high-quality voice, but you can also get clear voice even at low volumes.

Therefore, it is ideal for applications such as:

hands free headset
Digital camera
consumer electronics
Medical devices such as hearing aids
Hands-free call set for automobiles, etc.

Example of use	Details and challenges
home video	Homes are usually quiet environments where microphone noise can easily dominate. There are various capturing, playback conditions and equipment.
child	The subject moves well and has a soft (quiet) voice.
Social media	High image quality is required for maximum viewer engagement.
professional video	Job applications, interviews, recruitment, presentations, etc. High image quality is important for differentiating applicants and businesses.
music	High sound quality is important to ensure a natural recording. Diverse capturing and playback conditions present challenges.
performance	School performance can be difficult. Low voice, distance to target, ambient noise
Nature	The recorded sound has a low or very low sound pressure level.
Monitoring	The sound it picks up is small and comes from a distance.

2. Capable of capturing whispered voices with a wide dynamic range

The IM69D130 has a wide dynamic range of 105dB and high output linearity of up to 130dBSPL.
This makes it ideal for sensitive applications with low noise audio signals like whispers to rock concerts, excellent hit rate, and weak to strong signals.

Article header library 129257 pic01 1 — Dynamic range and standard MEMS microphones

Example of use	Details and challenges
pop/ rock music concert	Concerts are usually very loud. High sound quality is the key to good and natural acoustic performance.
sporting event	A situation where either the sport (such as motorsports) or the crowd (such as an ice hockey stadium) is very large.
Transportation	There is a lot of low frequency noise.
Wind	Wind is a common cause of poor quality audio/video recordings taken outdoors. A high AOP is useful for certain types of wind conditions.

3. Easy to solder to printed circuit board. Supports reflow soldering!

The IM69D130 MEMS microphone can withstand temperatures up to 260°C.

Due to its high heat resistance, it can be easily soldered to printed circuit boards. It can be used without problems on fully automated production lines including solder reflow.

Article header library 129257 pic02 1 — Dimensional drawing

Evaluation kit for easy evaluation of IM69D130

The "EVAL_IM69D130_FLEXKIT" evaluation kit is available for easy evaluation of the IM69D130.
This development kit has the IM69D130 mounted with the necessary pins pulled out.

This evaluation kit enables immediate evaluation.