Hello, I want to ask for electronic component.
How to Soldering Male Header Pins to INMP441 right ? on the module there a hole. So, the hole facing on top (Picture A) or facing bottom (Picture B)
Thank you for your attention
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If you are wiring this as a replacement in an existing PCB you need to match the pins to the existing circuitry.
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If you are making your own PCB, it does not matter.
Keep track of these signals and confirm their destinations. -
It it was me, on a new PCB, I would use B, components up, however, the microphone hole might work better if it was up.
There is an application note:
Recommendations-for-Mounting-and-Connecting-InvenSense-MEMS-Microphones.pdf
Even that document doesn't seem to give a definitive answer.
I would favour your 'type A' method of mounting, with the hole for the sound to enter upwards.
The hole is described as a 'bottom port', but I think that just refers to the fact that it is on the bottom side of the package.
I think that if you were to mount it as 'type B' then the cavity formed between the sensor PCB and the main PCB would add resonances and hence affect the frquency responce of the microphone.
Sound inlet is the ‘front’ side of the mems mic.
https://www.ednasia.com/wp-content/uploads/sites/3/2021/04/MEMS-Microphone-CUI-1.jpg?w=600
Always keep the labeled side facing upward. Insert the header pins from the top. The short leads pass through the board. Flip it and solder underneath carefully. The long pins should point downward. This fits standard breadboards perfectly. Keep the microphone port unobstructed always. Do not cover it with plastic. Sound enters through that tiny hole. Blocking it reduces sensitivity and clarity. Reverse mounting only for custom enclosures. Electrical connections remain identical either way. For a clean adapter layout consider proven designs. Check this reference project for guidance. WLED controller SR - INMP441 adapter - Share Project - PCBWay
shows a practical implementation. Use flux to ensure clean joints. Heat the pad not the pin. Apply solder briefly and smoothly evenly. Avoid overheating the tiny microphone component. Inspect each joint for bridges carefully. Trim excess pin length neatly afterward. Test continuity before powering everything up.
Use double length header pins and try which way works best.
Chop off the unused part of the pins.
As long as you keep an air gap around the open port, it should work.
You can always press some spare pin spacers onto the pins to increase spacing.
okay thanks for your advise. Based on Your link reference project, thats give me view setting-up inmp441. i will try soldering and test.
Don't use flux