INMP405: Omnidirectional Microphone with Bottom Port and Analog Output


InvenSense MEMS Microphone

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 ultraminiature 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.

† – 7” Tape and reel to be discontinued. Contact for availability.

INMP405 Functional Block Diagram

INMP405 Functional Block Diagram


  • Mobile devices
  • Digital video cameras
  • Bluetooth headsets
  • Video phones
  • Teleconferencing systems

Features and Benefits

  • Tiny 3.35 mm × 2.50 mm × 0.88 mm surface-mount package
  • High SNR of 62 dBA
  • High sensitivity of −38 dBV
  • Flat frequency response from 200 Hz to 15 kHz
  • Low current consumption: <250 μA
  • Single-ended analog output
  • High PSRR of 70 dB
  • Compatible with Sn/Pb and Pb-free solder processes
  • RoHS/WEEE compliant


Application Notes (General)

Application Notes (Specific)

Evaluation Board User Guides


Part # Output Port Location SNR Equivalent
Input Noise
Frequency Response
Maximum SPL Sensitivity @1kHz Sensitivity Tol Package Size Documentation Flex Board Evaluation Board Device
UNITS: (dBA) (dBA) (min - max) +/- dB mm (.pdf) (add to cart) (add to cart) (add to cart)

Analog Bottom 62dB 32dB 200Hz - 15kHz 120dB SPL -38 dBV 3dB 3.35x2.50x0.88 Datasheet

  • Disclaimer

    • InvenSense sensors should not be used or sold in the development, storing, production and utilization of any conventional or mass-destructive weapons or any other weapons or life-threatening applications as well as in any other life-critical applications including but not limited to medical equipment, transportation, aerospace and nuclear instruments, undersea equipment, power plant equipment, disaster prevention and crime prevention equipment. In devices or systems whereby malfunction of these products can be expected to result in personal injury and casualties, InvenSense customers using or selling these products do so at their own risk and agree to keep InvenSense harmless from any consequences. InvenSense reserves the right to make changes to this product, including its circuits and software, in order to improve its design and/or performance, without prior notice. InvenSense makes no warranty, either expressed or implied with respect to any product, and specifically disclaims all other warranties, including warranties for merchantability, non-infringement, and fitness for any particular purpose. For more information go to Terms and Conditions.

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