INMP441 MEMS High Precision Omnidirectional Microphone Module

190.00
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SKU: IFT00009-3 Category: Brand:

INMP441 MEMS High Precision Omnidirectional Microphone Module delivers clear, low-noise digital audio capture over I2S. Designers integrate it into voice assistants, IoT nodes, and audio recorders to stream high-fidelity mono data with simple clocking and minimal CPU load.

Key Features:
  • Digital I2S Output: Streams PDM-converted PCM-ready data for direct MCU/SoC input.
  • Omnidirectional Pattern: Captures sound uniformly for near- and far-field use.
  • Low Noise, High SNR: Typical SNR ~61 dBA for clean voice pickup.
  • Wide SPL Handling: Supports loud environments with low distortion.
  • Low Power: Operates efficiently for battery-powered designs.
  • Simple Left/Right Select: L/R pin configures left or right channel on shared data line.
Technical Specifications:
  • Microphone IC: INMP441 digital MEMS microphone
  • Interface: I2S (BCLK/SCK, LRCLK/WS, DOUT)
  • Supply Voltage (Module): 3.3 V DC typical
  • Sensitivity: −26 dBFS ±1 dB (typical)
  • Signal-to-Noise Ratio: ~61 dBA (typical)
  • Frequency Response: 60 Hz to 15 kHz usable band (voice-band focused)
  • Output Format: 24-bit right-justified I2S (common MCU-compatible modes)
  • Clocking: BCLK commonly 1–3.072 MHz; LRCLK commonly 16/32/48 kHz
  • Current Consumption: ~1 mA to 2 mA (operating, typical)
  • Operating Temperature: −40 °C to +85 °C
Mechanical Specifications:
  • Form Factor: Compact PCB module with sound port on top
  • Mounting: 2.54 mm header-compatible through-holes
  • Finish: ENIG or HASL pads for reliable soldering
  • Housing: MEMS transducer in protective acoustic cavity
Dimensions:
  • Module Size: Approx. 15 mm × 10 mm × 3 mm (varies by batch)
  • Hole Pitch: 2.54 mm between adjacent pins
  • Sound Port: ~Ø 0.5–1.0 mm top opening
Pinout and Wiring:
  • VDD: 3.3 V power input
  • GND: Ground
  • SCK / BCLK: Bit clock from host
  • WS / LRCLK: Word select (left/right clock) from host
  • SD / DOUT: Serial data output from microphone
  • L/R: Channel select; tie to GND for left, to VDD for right
  • Connect VDD and GND to 3.3 V rail. Provide BCLK and LRCLK from MCU/SoC, then read PCM data on DOUT. Use short traces and keep the sound port unobstructed.
Datasheet Reference:
  • Search for “INMP441 datasheet” and “INMP441 application notes” for full electrical characteristics, timing diagrams, and recommended I2S configurations.
Applications:
  • Voice Assistants and Smart Speakers: Capture commands with low noise.
  • IoT and Edge Audio: Stream microphone data to MCUs and Wi-Fi/BT SoCs.
  • Environmental Monitoring: Log sound levels and events.
  • Portable Recorders and Wearables: Add compact digital audio input.
  • Robotics and Drones: Enable voice control and acoustic sensing.
Equivalent Models:
  • ICS-43434: I2S digital MEMS microphone with similar performance
  • SPH0645LM4H-B: I2S MEMS mic used in low-power audio nodes
  • MP34DT05: Digital MEMS alternative; verify pinout and clocking
Package Includes:
  • 1 × INMP441 MEMS High Precision Omnidirectional Microphone Module

Additional information

Weight 1.6 g
Dimensions 14 × 14 × 5 mm
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INMP441 MEMS High Precision Omnidirectional Microphone Module

INMP441 MEMS High Precision Omnidirectional Microphone Module

190.00
You save

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