The INMP405 is a high quality, low cost, low power, analog output bottom-ported omnidirectional MEMS microphone. The INMP405 consists of a MEMS microphone element, an impedance converter, and an output amplifier. The INMP405 sensitivity specification makes it an excellent choice for both near field and far field applications. The INMP405 has a high SNR and flat, wideband frequency response, resulting in natural sound with high intelligibility. The specially designed low-frequency cutoff reduces wind noise. Low current consumption enables long battery life for portable applications. The INMP405 complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard.
The INMP405 is available in an ultra-miniature 3.35 mm × 2.50 mm × 0.88 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. The INMP405 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 | |||
 INMP405 |
NR/ND | Analog | Bottom | 62 | 120 | -38 | 3.35 x 2.5 x 0.88 | N/A |
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
AN-000013 – Analog Output MEMS Microphone Flex Evaluation Board User Guide
Low Self Noise: The First Step to High-Performance MEMS Microphone Applications
Analog and Digital MEMS Microphone Design Considerations
Understanding Microphone Sensitivity
