MEMS Microphone Omni Directional Microphone with Bottom Port and Digital Output

Analog Devices has sold its MEMS Microphone product line to InvenSense.

Please visit the InvenSense ADMP421 product page for all technical support and sales information.

The ADMP421 is a low cost, low power, digital output bottom ported omni-directional MEMS microphone. The ADM421 consists of a MEMS microphone element, an output amplifier and a 4th order sigma delta modulator. The digital interface allows for the PDM (Pulse Density Modulated) output of two microphones to be time multiplexed on a single data line using a single clock.

The ADMP421 has a high SNR and a high sensitivity making it an excellent choice for far field applications. The ADMP421 has a flat wideband frequency response resulting in natural sound with high intelligibility. Low current consumption and a sleep mode enable long battery life for portable applications. The ADMP421 complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard.

The ADMP421 will be available in a very thin 3 mm × 4 mm × 1 mm surface mount package. It is reflow solder compatible with no sensitivity degradation. It is halide-free.

Applications

* Smartphones and features phones

* Digital video cameras

* Bluetooth Headsets

* Video Phones

* Teleconferencing systems

* Small and thin 3 mm × 4 mm × 1 mm surface mount package * High SNR 61 dBA * High Sensitivity -26 dBFS * Flat Frequency Response from 100 to 15 kHz * Low Current Consumption < 650 μAmps