The INMP401 is a high quality, low cost, low power analog output bottom-ported omnidirectional MEMS microphone. The INMP401 consists of a MEMS microphone element, an impedance converter, and an output amplifier. The INMP401 sensitivity specification makes it an excellent choice for both near field and far field applications. The INMP401 has a high SNR and flat wideband frequency response, resulting in natural sound with high intelligibility. Low current consumption enables long battery life for portable applications. The INMP401 complies with the TIA-920 standard Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones.
The INMP401 is available in a thin, 4.72 mm × 3.76 mm × 1.0 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. The INMP401 is halide free.
| Part # | Market Status | Output | Port Location | SNR | AOP | Sensitivity | Package Size | LF Cutoff |
|---|---|---|---|---|---|---|---|---|
| UNITS: | dBA | dB SPL | dBV | (mm) | Hz |
| Part # | Market Status | Output | Port Location | SNR | AOP | Sensitivity | Package Size | LF Cutoff |
|---|---|---|---|---|---|---|---|---|
| UNITS: | dBA | dB SPL | dBV | (mm) | Hz | |||
 INMP401 |
NR/ND | Analog | Bottom | 62 | 120 | -42 | 4.72 x 3.76 x 1 | N/A |
INMP401 Datasheet
AN-100 – MEMS Microphone Handling and Assembly Guide
AN-1112 – Microphone Specifications Explained
AN-1124 – Recommendations for Sealing InvenSense Bottom-Port MEMS Microphones from Dust and Liquid Ingress
AN-1140 – Microphone Array Beamforming
AN-1003 – Recommendations for Mounting and Connecting InvenSense MEMS Microphones
AN-0207 – High-Performance Analog MEMS Microphone Simple Interface to SigmaDSP Audio Codec
AN-1165 – Op Amps for MEMS Microphone Preamp Circuits
AN-1181 – Using a MEMS Microphone in a 2-Wire Microphone Circuit
AN-0262 – Low-Noise Analog MEMS Microphone and Preamp with Compression and Noise Gating
Low Self Noise: The First Step to High-Performance MEMS Microphone Applications
Analog and Digital MEMS Microphone Design Considerations
Understanding Microphone Sensitivity
