INMP504: Ultralow Noise Microphone with Bottom Port and Analog Output


InvenSense MEMS Microphone

The INMP504 is a high performance, very low noise, low power, analog output, bottom-ported omnidirectional MEMS microphone. The INMP504 consists of a MEMS microphone element, an impedance converter and an output amplifier. The INMP504 sensitivity specification makes it an excellent choice for both near field and far field applications. The INMP504 is function- and pin-compatible with the INMP404 microphone, providing an easy upgrade path.

The INMP504 has very high SNR and extended wideband frequency response, resulting in natural sound with high intelligibility. Low current consumption enables long battery life for portable applications. The INMP504 complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard.

The INMP504 is available in an ultraminiature 3.35 mm × 2.5 mm × 0.88 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. The INMP504 is halide free.

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

INMP504 Functional Block Diagram

INMP504 Functional Block Diagram


  • Smartphones and feature phones
  • Tablet computers
  • Teleconferencing systems
  • Digital still & video cameras
  • Bluetooth headsets
  • Notebook PCs
  • Security and surveillance

Features and Benefits

  • Tiny 3.35 mm × 2.5 mm × 0.88 mm surface mount package
  • Omnidirectional Response
  • Very high SNR of 65 dBA
  • Sensitivity of –38 dBV
  • Extended frequency response from 100 Hz to 20 kHz
  • Low current consumption: < 180 uA
  • Single-ended analog output
  • 120 dB maximum SPL
  • High PSR of 70 dBV
  • Compatible with Sn/Pb and Pb-free solder processes
  • RoHS/WEEE compliant


Application Notes (General)

Application Notes (Specific)

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 65dB 29dB 100Hz - 20kHz 120dB SPL -38 dBV 3dB 3.35x2.5x0.88 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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