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INMP441
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Ông. Phần #INMP441
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Equivalent
The INMP441 (MEMS digital microphone) has several equivalents, including:
- SPH0645LM4H-1 (Knowles)
- ICS-43434 (TDK InvenSense)
- SPU0410LR5H-QB (Knowles)
- ADMP521 (Analog Devices)
These alternatives offer similar digital PDM output, sensitivity, and performance. Check datasheets for exact specs like SNR, frequency response, and power requirements.
- SPH0645LM4H-1 (Knowles)
- ICS-43434 (TDK InvenSense)
- SPU0410LR5H-QB (Knowles)
- ADMP521 (Analog Devices)
These alternatives offer similar digital PDM output, sensitivity, and performance. Check datasheets for exact specs like SNR, frequency response, and power requirements.
Features
The INMP441 is a high-performance, low-power digital MEMS microphone with the following key features:
- Digital Output: I²S interface for direct connection to processors.
- Omnidirectional Polar Pattern: Captures sound uniformly from all directions.
- Wide Frequency Response: 60 Hz – 15 kHz (±3 dB).
- High SNR: 61 dBA for clear audio capture.
- Low Power Consumption: 1.5 mA typical at 1.8V.
- High Acoustic Overload Point (AOP): 120 dBSPL for minimal distortion.
- Small Form Factor: 3.76 x 4.72 x 1.0 mm (LxWxH).
- Operating Voltage: 1.8V (±10%).
- Low Self-Noise: 29 dBA for high-quality recordings.
Ideal for smartphones, IoT devices, and voice recognition systems.
- Digital Output: I²S interface for direct connection to processors.
- Omnidirectional Polar Pattern: Captures sound uniformly from all directions.
- Wide Frequency Response: 60 Hz – 15 kHz (±3 dB).
- High SNR: 61 dBA for clear audio capture.
- Low Power Consumption: 1.5 mA typical at 1.8V.
- High Acoustic Overload Point (AOP): 120 dBSPL for minimal distortion.
- Small Form Factor: 3.76 x 4.72 x 1.0 mm (LxWxH).
- Operating Voltage: 1.8V (±10%).
- Low Self-Noise: 29 dBA for high-quality recordings.
Ideal for smartphones, IoT devices, and voice recognition systems.
Pinout
The INMP441 is a digital MEMS microphone with a 5-pin LGA package. Its pin functions are as follows:
1. VDD (Pin 1) – Power supply (1.8V–3.3V).
2. GND (Pin 2) – Ground.
3. LR (Pin 3) – Left/right channel select (tied high/low or left floating for mono mode).
4. SCK (Pin 4) – Serial clock input (I²S interface).
5. WS (Pin 5) – Word select (I²S, determines left/right channel).
6. SD (Pin 6) – Serial data output (I²S).
It supports I²S output with a 24-bit resolution and operates at a 64× clock-to-sample rate ratio (e.g., 1.024 MHz for 16 kHz sampling). The INMP441 is omnidirectional and widely used in voice recognition and audio recording applications.
1. VDD (Pin 1) – Power supply (1.8V–3.3V).
2. GND (Pin 2) – Ground.
3. LR (Pin 3) – Left/right channel select (tied high/low or left floating for mono mode).
4. SCK (Pin 4) – Serial clock input (I²S interface).
5. WS (Pin 5) – Word select (I²S, determines left/right channel).
6. SD (Pin 6) – Serial data output (I²S).
It supports I²S output with a 24-bit resolution and operates at a 64× clock-to-sample rate ratio (e.g., 1.024 MHz for 16 kHz sampling). The INMP441 is omnidirectional and widely used in voice recognition and audio recording applications.
Application
The INMP441 is a digital MEMS microphone widely used in:
1. Smart Devices – Smartphones, tablets, and wearables for voice capture.
2. IoT & Home Automation – Voice-controlled assistants (e.g., Alexa, Google Home).
3. Audio Recording – Cameras, drones, and conferencing systems.
4. Noise Monitoring – Environmental and industrial noise detection.
5. Automotive – In-car voice recognition and hands-free systems.
6. Gaming – VR headsets and gaming peripherals for immersive audio.
Its low power consumption, high SNR, and small size make it ideal for compact, high-quality audio applications.
1. Smart Devices – Smartphones, tablets, and wearables for voice capture.
2. IoT & Home Automation – Voice-controlled assistants (e.g., Alexa, Google Home).
3. Audio Recording – Cameras, drones, and conferencing systems.
4. Noise Monitoring – Environmental and industrial noise detection.
5. Automotive – In-car voice recognition and hands-free systems.
6. Gaming – VR headsets and gaming peripherals for immersive audio.
Its low power consumption, high SNR, and small size make it ideal for compact, high-quality audio applications.
Package
The INMP441 is a digital MEMS microphone with an omnidirectional polar pattern. It comes in a surface-mount (SMD) package, specifically a 3.76 x 4.72 x 1.0 mm LGA (Land Grid Array) package. This compact design is suitable for PCB mounting in space-constrained applications like smartphones, IoT devices, and audio recording systems. It supports I²S output for direct digital audio interfacing.
