The ADMP405 is a low‑cost, low‑power, bottom‑port, analog output MEMS omnidirectional microphone with high SNR and flat frequency response.
The ADMP405 is a high‑quality, low‑cost MEMS microphone featuring a bottom‑port acoustic inlet and an analog output. It offers a high signal‑to‑noise ratio of 62 dBA, a sensitivity of –38 dBV, and a flat frequency response from 200 Hz to 15 kHz, making it suitable for both near‑field and far‑field audio capture. Its low power consumption (<250 µA) and high PSRR (70 dB) help extend battery life in portable devices.
Typical applications include smart phones, conference systems, digital camcorders, Bluetooth headsets, video phones, and tablets. The device is supplied in a compact 3.35 mm × 2.50 mm × 0.88 mm LGA package that is compatible with standard reflow soldering and RoHS‑compliant processes. This manual is written in Chinese.
| Signal‑to‑Noise Ratio (SNR) | 62 dBA |
|---|---|
| Sensitivity | -38 dBV |
| Frequency Response | 200 Hz – 15 kHz |
The recommended PCB pad layout should follow a 1:1 scale to the microphone package, avoid applying solder paste over the acoustic port, and keep the pad diameter larger than 0.5 mm.