INMP401ACEZ-R0

Microphones Overview

The INMP401ACEZ-R0 is an analog MEMS microphone manufactured by TDK InvenSense. It features a silicon-based omnidirectional acoustic port with bottom-side placement. The device operates within a voltage range of 1.5 V to 3.3 V and draws a supply current of 250 µA. Its frequency response spans from 60 Hz to 15 kHz, providing audio capture capabilities suitable for voice applications. The sensitivity is specified at -42 dB ±3 dB relative to 1 V/Pa at 94 dB SPL. The signal-to-noise ratio is rated at 62 dB. The output impedance is 200 Ohms. The component utilizes a pad termination method and is housed in a rectangular package measuring 4.72 mm in length, 3.76 mm in width, and 1.10 mm in maximum height.

Microphones Feature Summary

• Omnidirectional acoustic design utilizing silicon MEMS technology for consistent sound pickup from all directions.
• Analog output interface compatible with standard audio processing circuits without requiring digital conversion.
• Low power consumption profile optimized for battery-operated portable devices and always-on listening scenarios.

Microphones Applications

• Mobile phones and smartphones
• Laptops and personal computers
• Wearable electronic devices

Microphones Procurement Notes

Verify the specific ordering suffix and packaging configuration against the latest manufacturer documentation, as distribution channels may list varying reel quantities or tape specifications. Confirm that the procurement source accepts components marked as obsolete or end-of-life status if applicable to your inventory planning. Ensure compliance with RoHS3 regulations and check moisture sensitivity level (MSL) handling requirements prior to soldering. Cross-reference the manufacturer part number with distributor codes to avoid substitution errors during sourcing.

Microphones Selection Notes

Select this component when an analog audio interface is required rather than a digital PDM or I2S alternative. Consider the 62 dB SNR and -42 dB sensitivity metrics for environments where moderate acoustic clarity is sufficient. Evaluate the 250 µA current draw against system power budgets for portable applications. The bottom-port orientation must be accommodated in the mechanical enclosure design to ensure unobstructed sound entry. Verify that the 1.5 V to 3.3 V operating range aligns with the target system's logic and power supply levels.

Microphones Part Context

This microphone belongs to the INMP401 series produced by TDK InvenSense, a subsidiary of TDK Corporation specializing in MEMS sensor solutions. The company provides motion, audio, and pressure sensors for consumer, industrial, and automotive markets. The INMP401 series represents the analog microphone segment of their portfolio, designed for integration into mobile and computing platforms. TDK InvenSense leverages extensive patent history in MEMS innovation to deliver high-reliability sensing components.

Microphones Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. The product status is listed as discontinued or obsolete in distributor records. Designers should consult official TDK InvenSense resources for potential next-generation replacements or contact authorized distributors for legacy stock availability.