ADMP405 is a high quality, high performance, low power, analog output, bottom-ported omnidirectional MEMS microphone from Analog Devices. It features high SNR, high sensitivity, low power consumption, single-ended analog output, and is compatible with Sn/Pb and Pb-free solder processes. It is suitable for use in a variety of applications, including smartphones, feature phones, video conferencing systems, digital video cameras, Bluetooth headsets, video phones, and tablets.
The ADMP405 is a high‑performance, low‑power MEMS microphone with a single‑ended analog output. It features a tiny 3.35 mm × 2.50 mm × 0.88 mm package, high SNR of 62 dBA, sensitivity of –38 dBV, flat frequency response from 200 Hz to 15 kHz, and a supply current below 250 pA, making it suitable for portable devices.
The datasheet provides detailed electrical specifications, absolute maximum ratings, pin configuration, typical performance curves, PCB land‑pattern guidelines, and ordering information. Application notes describe how to connect the microphone to audio codecs and op‑amps, and give recommendations for mounting, soldering, and sealing against dust and liquid ingress.
| Sensitivity (typ) | -38 dBV |
|---|---|
| Signal‑to‑Noise Ratio (SNR) | 62 dBA |
| Frequency response | 200 Hz – 15 kHz |
| Supply voltage range | 1.5 V – 3.3 V |
| Supply current | <250 pA |
| Output impedance | 200 Ω |
| Maximum acoustic input | 120 dB SPL |
The ADMP405 has a signal‑to‑noise ratio of 62 dBA.
It operates from 1.5 V up to 3.3 V.
Typical sensitivity is –38 dBV at 1 kHz, 94 dB SPL.
The device can tolerate up to 120 dB SPL acoustic input.