ADMP421

`Small and thin 3 mm  4 mm  1 mm surface-mount packag
`High SNR of 60.5 dBA
`High sensitivity of 26 dBFS
`Flat frequency response from 100 Hz to over 12 kHz
`Low current consumption: <650 A
`High PSRR of 80 dBFS
`Fourth-order  - modulato
`Digital PDM output
`Compatible with Sn/Pb and Pb-free solder processes 
`RoHS/WEEE compliant 

The ADMP421 is a low cost, low power, digital output bottom ported omnidirectional MEMS microphone. The ADMP421 ts of a MEMS microphone element, an output amplifier, and a fourth-order - modulator. The digital interface allow for e pulse density modulated (PDM) 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 bles long battery life for portable applications. A built-in particle filter provides for high reliability. 

The ADMP421 is available in a thin 3 mm  4 mm  1 m surface-mount package. It is reflow solder compatible with no itivity degradation.