<div class="detailmodule_html"><div class="detail-desc-decorate-richtext"><strong><span style="font-size:20px;">【Product Introduction】</span></strong><br /> <br /> <span style="font-size:18px;">INMP441 is a high-performance, low-power, digital output, omnidirectional MEMS microphone with a bottom port. The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog-to-digital converter, anti aliasing filter, power management, and industry standard 24 bit I &sup2; S interface. The I &sup2; S interface allows the INMP441 to be directly connected to digital processors such as DSP and microcontrollers without the need for audio codecs used in the system. INMP441 has a high signal-to-noise ratio and is an excellent choice for near-field applications. INMP441 has a flat broadband frequency response, resulting in high clarity of natural sound.</span><br /> <br /> <strong><span style="font-size:20px;">【Product Features】</span></strong><br /> <br /> <span style="font-size:18px;">1. Digital I &sup2; S interface with high-precision 24 bit data<br /> <br /> 2. High signal-to-noise ratio of 61 dBA<br /> <br /> 3. High sensitivity -26 dBFS<br /> <br /> 4. Stable frequency response from 60 Hz to 15 kHz<br /> <br /> 5. Low power consumption: low current consumption of 1.4 mA<br /> <br /> 6. High PSR: -75 dBFS</span><br /> <br /> <strong><span style="font-size:20px;">【 Interface definition 】</span></strong><br /> <br /> <span style="font-size:18px;">SCK: Serial Data Clock for I &sup2; S Interface<br /> <br /> WS: Serial Data Word Selection for I &sup2; S Interface<br /> <br /> L/R: Left/right channel selection.<br /> <br /> When set to low level, the microphone outputs a signal in the left channel of the I &sup2; S frame.<br /> <br /> When set to high level, the microphone outputs a signal in the right channel<br /> <br /> SD: Serial data output of I &sup2; S interface.<br /> <br /> VCC: Input power supply, 1.8V to 3.3V<br /> <br /> GND: Power Ground</span><br /> <br /> <span style="color:#3498db;"><span style="font-size:18px;"><strong>Connecting with ESP32 development board：</strong></span></span><br /> <br /> <span style="font-size:18px;">INMP441&nbsp;&nbsp;ESP32&nbsp;<br /> <br /> 1.SCK &gt;&gt; GPIO14<br /> 2.SD &gt;&gt; GPIO32<br /> 3.WS &gt;&gt; GPIO15<br /> 4.L/R &gt;&gt; GND<br /> 5.GND &gt;&gt; GND<br /> 6.VDD &gt;&gt; VDD3.3<br /> </span></div></div>