Description

Applications

• ESP32 Based Audio Recorders / Playback systems
• DIY Google Assistant, Amazon Alexa, Siri, Cortana
• Bluetooth Headsets
• Two-Way Communicators
• Portable Voice Recorders
• IP Phones/Telephone Conferencing

Technical Specifications

• Type: MEMS
• Operating Voltage: 1.8v-3.3v
• Current Consumption
  • Operating Current: 1.4mA ~16mA @ 1.8v; 2.2mA ~2.5mA @3.3V
  • Standby Current: 0.8mA @1.8V and 3.3v
  • Power Down Current: 2uA @1.8V; 4.5uA @ 3.3V
• Output: Digital I2S Interface
• Frequency Response: 60Hz – 15 KHz
• Sensitivity: -26dB ±3dB @ 94dB SPL
• Signal to Noise Ratio: High signal to noise ratio is 61 dBA
• PSRR: -75dfs
• Dimensions: Diameter 14mm
• Weight: 0.7g ~ 1.0g

Pinouts

• SCK: Serial data clock for I2S interface
• WS: Serial data word selection for I2S interface
• L/R: Left/Right channel selection.
  • When set to low, the microphone outputs a signal on the left channel of the I2S frame.
  • When set to high level, the microphone outputs signals on the right channel
• SD: Serial data output of the I2S interface.
• VCC: Input power, 1.8V to 3.3V.
• GND: power ground

Documents and Downloads

• INMP441 Datasheet
• ESP32 INMP441 based Matrix VU meter example

Package Includes

• 1x Omnidirectional 24-Bit I2S MEMS Microphone Module – INMP441