The INMP421 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 to microphones to be time multiplexed on a single data line using a single clock.
The INMP421 has a high SNR and a high sensitivity making it an excellent choice for far field applications. The INMP421 has a flat wideband frequency response resulting in natural soundwith high intelligibility. Low current consumption and a sleep mode enable long battery life for portable applications. The INMP421 complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard.
The INMP421 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.
|Part #||Output||Port Location||SNR||Equivalent
||Maximum SPL||Sensitivity @1kHz||Sensitivity Tol||Package Size||Documentation||Flex Board||Evaluation Board||Device|
|UNITS:||(dBA)||(dBA)||(min - max)||+/- dB||mm||(.pdf)||(add to cart)||(add to cart)||(add to cart)|
|PDM||Bottom||61dB||33dB||100Hz - 15kHz||120dB SPL||-26 dBFS||3dB||3.00x4.00x1.00|