Dingxin MEMS Microphone New Product Launch

Preface

TWS earphones, smart glasses, and smart wearables have been in great demand in the past two years, but the small MEMS microphone inside has always been a concern for many supply chain friends - international manufacturers have fluctuating delivery times and high prices, and domestic solution providers are looking for a domestically produced substitute with parameter benchmarking, no material selection on the machine, and easy SMT processing. Choosing between them is always a disappointment.
Now, Dingxin Electronics has completed this matter. Two new MEMS analog microphones from Dingxin have officially started mass production and sale: the bottom input MP381A and the top input MP421A, which are directly benchmarked against the same specification part numbers of Loushi/GoerTek. They are available in stock and can be shipped on the same day of sample collection.

1、 Two main models with parameters directly benchmarked against top tier manufacturers
Typical applications of model input method sensitivity signal-to-noise ratio
MP381A bottom input -38 dB 59 dB TWS earphones main microphone, call earphones
MP421A top input -42 dB 55 dB smart glasses, smart wearables, external microphone

The bottom input is suitable for vertical stacking of motherboards and the design where the cavity is hidden inside the shell; Top entry is suitable for wearable products with front openings and close range sound pickup. Both models are standard 3.5 × 2.6 mm MEMS packages, with PCB pads compatible with mainstream solutions, and no need to redraw the board after material replacement.

2、 Five hard strengths, each one is a product of mass production stepping on pitfalls
✅  Sensitivity deviation ± 1 dB, no need to pick materials on the machine
Anyone who has worked on a complete machine knows that microphone sensitivity has a large variability, which is the root of all problems in post production tuning and consistency. The full frequency sensitivity deviation of these two materials from Dingxin is controlled within ± 1 dB, and the consistency of the entire batch of incoming materials is high. There is no need for manual sorting or individual calibration on the production line, and the sound engineer can finish work earlier.

✅  Anti RF interference, no stuttering or swallowing during calls
In the scenario where 5G, WiFi 6, and Bluetooth earphones coexist on mobile phones, MEMS microphones are most susceptible to radio frequency interference, producing "sizzling sound" and swallowing words. The MP381A/MP421A has been designed with RF shielding inside, which ensures clean communication even in strong RF environments. The other party listens to you as clearly as in a quiet room.

✅  Standard SMT mounting, no selection of OEM factories
Roll and tape packaging, moisture-proof vacuum packaging (the actual picture is the original disc we sent out), compatible with mainstream SMT production line reflow soldering curves, any legitimate SMT factory can directly machine it, without the need for special process debugging, and without the embarrassment of "only one line can be pasted well".

✅  A high signal-to-noise ratio is necessary for clean sound pickup
MP381A: 59 dB SNR - This number belongs to the first tier in the TWS main microphone range, with wind noise floor that can be suppressed and vocal details preserved.
MP421A: 55 dB SNR - meets the call and voice wake-up needs of near-field pickup scenarios such as smart glasses, wristbands, and watches.
✅  Domestic supply chain, delivery time and price are the the final say
Benchmarking with Lou's and GoerTek's same specification part numbers, Dingxin's local wafer+local packaging and testing, competitive spot inventory, weekly delivery time, and bulk price. Geography is not a bottleneck, large customer orders are not squeezed, and small batch sampling will not be rejected.

3、 Who is most suitable for use?
TWS earphone/call earphone solution provider: MP381A as the main microphone, directly replacing imported materials of the same specifications, reducing costs without compromising call quality.
Smart glasses/AR glasses team: MP421A with top sound input and friendly front opening structure, suitable for lightweight temple design.
Smart wearables (watches, bracelets, rings, Bluetooth earphones): A stable, inexpensive, and non picky digital/analog microphone is needed as an alternative.
AI recording pens, smart speakers, remote controls, security cameras: Any product that needs to pick up sound is worth adding to the BOM as a second supplier.
4、 Write at the end
Domestic substitution has been advocated for many years, and what can truly be implemented on the production line is not "similar parameters", but the solid implementation of consistency, anti-interference, manufacturability, and delivery time.

These two MEMS microphones from Dingxin are aimed at being "ready to use on the machine and batch production without tipping over".

The bosses of TWS earphones, smart glasses, and smart wearables have put alternative solutions on the table. Welcome to request samples, conduct mapping, and do second supplier verification - sample in stock, ready for shipment at any time.