The ADMP404 is a high quality, high performance, low power, analog output bottom-ported omnidirectional MEMS microphone. It features high SNR, high sensitivity, flat frequency response, low current consumption and high PSRR. It is suitable for applications such as smartphones and feature phones, video conferencing systems, digital cameras, Bluetooth headsets, video phones and tablets.
The ADMP404 is a high‑performance, low‑power MEMS microphone featuring a tiny 3.35 mm × 2.50 mm × 0.88 mm surface‑mount package, high sensitivity (‑38 dBV), and a signal‑to‑noise ratio of 62 dBA. It offers a flat frequency response from 100 Hz to 15 kHz, low current draw (<250 pA), and a single‑ended analog output suitable for smartphones, tablets, video phones, and Bluetooth headsets.
The datasheet provides detailed specifications, absolute maximum ratings, pin configuration, typical performance curves, PCB land‑pattern guidelines, and ordering information. It also includes application notes for connecting the microphone to Analog Devices audio codecs and recommended soldering profiles.
| Package dimensions | 3.35 mm × 2.50 mm × 0.88 mm |
|---|---|
| Sensitivity (typ) | -38 dBV |
| Signal‑to‑Noise Ratio | 62 dBA |
| Frequency response | 100 Hz – 15 kHz |
| Supply current | <250 pA |
| Output impedance | 200 Ω |
| Maximum acoustic input | 120 dB SPL |
| Power‑supply rejection ratio | 70 dB |
| Absolute maximum supply voltage | -0.3 V to +3.6 V |
| Mechanical shock rating | 10 000 g |
| Temperature range | -40 °C to +70 °C |
The ADMP404 has a typical sensitivity of -38 dBV.
The microphone draws less than 250 pA of supply current.
The ADMP404 provides a signal‑to‑noise ratio of 62 dBA.