INMP504

Microphones Overview

The INMP504 is a digital MEMS microphone featuring an I2S interface. It integrates a silicon capacitor microphone element with an integrated circuit for signal conditioning and digital conversion. The device operates at a supply voltage of 1.62V to 3.6V. It supports standard sampling rates including 8kHz, 16kHz, 32kHz, 48kHz, and 96kHz. The microphone offers a sensitivity of -26dBFS typical at 1kHz with 94dB SPL input. It provides a dynamic range of 64dB and a signal-to-noise ratio of 64dBA.

Microphones Feature Summary

• Digital output via standard I2S interface eliminates need for external analog-to-digital conversion
• Integrated silicon capacitor microphone element ensures high reliability and consistency
• Low power consumption suitable for battery-operated portable devices
• Compact package design facilitates integration into space-constrained applications

Microphones Applications

• Smartphones and tablets
• Laptops and ultrabooks
• Voice-activated remote controls
• Internet of Things (IoT) devices

Microphones Procurement Notes

Verify the specific suffix code on the component marking against the official TDK InvenSense datasheet to confirm pinout configuration and packaging type. Ensure the ordering part number matches the required sampling rate support and sensitivity specifications for your design. Cross-reference the RoHS compliance status and lead-free finish requirements with current manufacturer documentation before finalizing procurement.

Microphones Selection Notes

Select this component when a digital audio interface is preferred over analog outputs to reduce noise susceptibility in PCB layout. Consider the operating voltage range compatibility with the host processor's I/O levels. Evaluate the acoustic performance metrics such as sensitivity and SNR against the target application's voice recognition or recording quality requirements. Confirm the physical dimensions fit within the available enclosure space.

Microphones Part Context

This component belongs to the family of digital MEMS microphones designed for consumer electronics. It replaces traditional analog electret condenser microphones by providing a direct digital signal. The technology leverages silicon micromachining for consistent acoustic performance. It is engineered to meet the stringent size and power constraints of modern mobile and computing platforms.

Microphones Replacement Considerations

Check for compatible alternatives from the same product family that share identical pinouts and electrical characteristics. Verify that any substitute part maintains the same I2S protocol compatibility and mechanical footprint. Ensure the replacement meets the same environmental and reliability standards required for the original design.