NMP441 MEMS High Precision Omnidirectional Microphone

The INMP441 is a high-per­for­mance, low-pow­er, dig­i­tal out­put, omni­di­rec­tion­al MEMS micro­phone with a bot­tom port design. It inte­grates a com­plete solu­tion that includes a MEMS sen­sor, sig­nal con­di­tion­ing, ADC (Ana­log-to-Dig­i­tal Con­vert­er), anti-alias­ing fil­ter, pow­er man­age­ment, and a stan­dard 24-bit I2S inter­face.Thanks to its I2S out­put, the INMP441 can be con­nect­ed direct­ly to dig­i­tal proces­sors such as DSPs and micro­con­trollers with­out the need for an exter­nal audio codec. With its high sig­nal-to-noise ratio and wide, flat fre­quen­cy response, it is an excel­lent choice for near-field audio appli­ca­tions, deliv­er­ing clear and nat­ur­al sound repro­duc­tion.Product FeaturesDig­i­tal I2S inter­face with high-pre­ci­sion 24-bit dataHigh sig­nal-to-noise ratio: 61 dBAHigh sen­si­tiv­i­ty: -26 dBFSSta­ble fre­quen­cy response: 60 Hz to 15 kHzLow pow­er con­sump­tion: only 1.4 mAHigh pow­er sup­ply rejec­tion (PSR): -75 dBFSPin Description (Interface Definition)SCK: Ser­i­al data clock for the I2S inter­faceWS: Word select (chan­nel selec­tion) for the I2S inter­faceL/R: Left/Right chan­nel selectLow → out­puts audio on the Left chan­nelHigh → out­puts audio on the Right chan­nelSD: Ser­i­al data out­put of the I2S inter­faceVCC: Pow­er input (1.8V to 3.3V)GND: GroundConnection to ESP32This prod­uct includes tuto­ri­als for using ESP32 mod­ules with I2S func­tion­al­i­ty. Wiring exam­ple:INMP441ESP32SCKGPIO14SDGPIO32WSGPIO15L/RGNDGNDGNDVDD3.3V