The ICS-40181 is an analog MEMS microphone with high SNR and enhanced RF immunity. The ICS-40181 includes a MEMS microphone element, an impedance converter, and an output amplifier.
Other high-performance specification include a linear response up to 124 dB SPL, tight ±1 dB sensitivity tolerance and enhanced immunity to both radiated and conducted RF interference.
This microphone’s electro-acoustic performance matches the bottom port ICS-40180, making this pair of microphones suitable to use together in applications requiring both top and bottom port devices.
The ICS-40181 is available in a small 3.5 mm × 2.65 mm × 0.98 mm surface-mount package.
| 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 | |||
 ICS-40181 |
EOL | Analog | Top | 65 | 124 | -38 | 3.5 × 2.65 × 0.98 | 60 |
AN-100 – MEMS Microphone Handling and Assembly Guide
AN-1003 – Recommendations for Mounting and Connecting InvenSense MEMS Microphones
AN-1112 – Microphone Specifications Explained
AN-1140 – Microphone Array Beamforming
AN-1165 – Op Amps for MEMS Microphone Preamp Circuits
AN-0207 – High-Performance Analog MEMS Microphone Simple Interface to SigmaDSP Audio Codec
AN-1181 – Using a MEMS Microphone in a 2-Wire Microphone Circuit
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
