ADMP521 is an ultralow noise microphone with bottom port and PDM digital output, suitable for applications such as smartphones and feature phones, tablets, telephone conferencing systems, digital cameras and video cameras, Bluetooth headsets, notebook computers, security and surveillance.
The ADMP521 is an ultralow‑noise, low‑power, bottom‑ported omnidirectional MEMS microphone with a 4 mm × 3 mm × 1 mm surface‑mount package. It offers a high SNR of 65 dBA, sensitivity of –26 dBFS, and a wide frequency response from 100 Hz to 16 kHz, making it suitable for smartphones, tablets, cameras, and other portable audio devices.
The handbook includes detailed specifications, timing characteristics, absolute maximum ratings, pin configuration, typical performance graphs, theory of operation, PDM data format, and ordering information. It also provides revision history, application notes, and recommended soldering profiles for designers and integrators.
| Sensitivity | -26 dBFS |
|---|---|
| Signal‑to‑Noise Ratio (SNR) | 65 dBA |
| Frequency Response | 100 Hz – 16 kHz |
| Supply Voltage (Vop) | 1.8 V – 3.3 V |
| Supply Current (Normal Mode) | 0.9 mA – 1.0 mA |
The ADMP521 operates from 1.8 V to 3.3 V supply voltage.
The ADMP521 has a sensitivity of –26 dBFS at 94 dB SPL.
The device can handle up to 120 dB SPL acoustic input.
In sleep mode the ADMP521 consumes less than 0.5 µA at 1.8 V.